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85c20c304f
Plain gcc may not but sparse catches and complains about this sort of stuff. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2569 lines
66 KiB
C
2569 lines
66 KiB
C
/*
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* Blame
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*
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* Copyright (c) 2006, Junio C Hamano
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*/
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#include "cache.h"
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#include "builtin.h"
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#include "blob.h"
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#include "commit.h"
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#include "tag.h"
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#include "tree-walk.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "revision.h"
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#include "quote.h"
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#include "xdiff-interface.h"
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#include "cache-tree.h"
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#include "string-list.h"
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#include "mailmap.h"
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#include "parse-options.h"
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#include "utf8.h"
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#include "userdiff.h"
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static char blame_usage[] = "git blame [options] [rev-opts] [rev] [--] file";
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static const char *blame_opt_usage[] = {
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blame_usage,
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"",
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"[rev-opts] are documented in git-rev-list(1)",
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NULL
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};
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static int longest_file;
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static int longest_author;
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static int max_orig_digits;
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static int max_digits;
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static int max_score_digits;
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static int show_root;
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static int reverse;
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static int blank_boundary;
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static int incremental;
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static int xdl_opts;
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static int abbrev = -1;
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static enum date_mode blame_date_mode = DATE_ISO8601;
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static size_t blame_date_width;
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static struct string_list mailmap;
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#ifndef DEBUG
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#define DEBUG 0
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#endif
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/* stats */
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static int num_read_blob;
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static int num_get_patch;
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static int num_commits;
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#define PICKAXE_BLAME_MOVE 01
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#define PICKAXE_BLAME_COPY 02
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#define PICKAXE_BLAME_COPY_HARDER 04
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#define PICKAXE_BLAME_COPY_HARDEST 010
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/*
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* blame for a blame_entry with score lower than these thresholds
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* is not passed to the parent using move/copy logic.
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*/
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static unsigned blame_move_score;
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static unsigned blame_copy_score;
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#define BLAME_DEFAULT_MOVE_SCORE 20
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#define BLAME_DEFAULT_COPY_SCORE 40
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/* bits #0..7 in revision.h, #8..11 used for merge_bases() in commit.c */
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#define METAINFO_SHOWN (1u<<12)
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#define MORE_THAN_ONE_PATH (1u<<13)
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/*
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* One blob in a commit that is being suspected
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*/
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struct origin {
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int refcnt;
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struct origin *previous;
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struct commit *commit;
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mmfile_t file;
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unsigned char blob_sha1[20];
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unsigned mode;
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char path[FLEX_ARRAY];
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};
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static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b, long ctxlen,
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xdl_emit_hunk_consume_func_t hunk_func, void *cb_data)
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{
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xpparam_t xpp = {0};
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xdemitconf_t xecfg = {0};
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xdemitcb_t ecb = {NULL};
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xpp.flags = xdl_opts;
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xecfg.ctxlen = ctxlen;
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xecfg.hunk_func = hunk_func;
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ecb.priv = cb_data;
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return xdi_diff(file_a, file_b, &xpp, &xecfg, &ecb);
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}
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/*
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* Prepare diff_filespec and convert it using diff textconv API
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* if the textconv driver exists.
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* Return 1 if the conversion succeeds, 0 otherwise.
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*/
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int textconv_object(const char *path,
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unsigned mode,
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const unsigned char *sha1,
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char **buf,
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unsigned long *buf_size)
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{
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struct diff_filespec *df;
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struct userdiff_driver *textconv;
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df = alloc_filespec(path);
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fill_filespec(df, sha1, mode);
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textconv = get_textconv(df);
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if (!textconv) {
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free_filespec(df);
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return 0;
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}
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*buf_size = fill_textconv(textconv, df, buf);
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free_filespec(df);
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return 1;
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}
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/*
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* Given an origin, prepare mmfile_t structure to be used by the
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* diff machinery
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*/
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static void fill_origin_blob(struct diff_options *opt,
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struct origin *o, mmfile_t *file)
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{
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if (!o->file.ptr) {
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enum object_type type;
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unsigned long file_size;
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num_read_blob++;
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if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
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textconv_object(o->path, o->mode, o->blob_sha1, &file->ptr, &file_size))
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;
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else
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file->ptr = read_sha1_file(o->blob_sha1, &type, &file_size);
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file->size = file_size;
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if (!file->ptr)
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die("Cannot read blob %s for path %s",
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sha1_to_hex(o->blob_sha1),
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o->path);
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o->file = *file;
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}
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else
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*file = o->file;
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}
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/*
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* Origin is refcounted and usually we keep the blob contents to be
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* reused.
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*/
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static inline struct origin *origin_incref(struct origin *o)
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{
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if (o)
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o->refcnt++;
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return o;
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}
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static void origin_decref(struct origin *o)
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{
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if (o && --o->refcnt <= 0) {
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if (o->previous)
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origin_decref(o->previous);
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free(o->file.ptr);
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free(o);
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}
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}
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static void drop_origin_blob(struct origin *o)
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{
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if (o->file.ptr) {
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free(o->file.ptr);
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o->file.ptr = NULL;
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}
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}
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/*
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* Each group of lines is described by a blame_entry; it can be split
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* as we pass blame to the parents. They form a linked list in the
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* scoreboard structure, sorted by the target line number.
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*/
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struct blame_entry {
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struct blame_entry *prev;
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struct blame_entry *next;
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/* the first line of this group in the final image;
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* internally all line numbers are 0 based.
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*/
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int lno;
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/* how many lines this group has */
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int num_lines;
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/* the commit that introduced this group into the final image */
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struct origin *suspect;
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/* true if the suspect is truly guilty; false while we have not
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* checked if the group came from one of its parents.
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*/
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char guilty;
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/* true if the entry has been scanned for copies in the current parent
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*/
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char scanned;
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/* the line number of the first line of this group in the
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* suspect's file; internally all line numbers are 0 based.
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*/
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int s_lno;
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/* how significant this entry is -- cached to avoid
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* scanning the lines over and over.
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*/
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unsigned score;
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};
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/*
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* The current state of the blame assignment.
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*/
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struct scoreboard {
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/* the final commit (i.e. where we started digging from) */
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struct commit *final;
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struct rev_info *revs;
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const char *path;
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/*
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* The contents in the final image.
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* Used by many functions to obtain contents of the nth line,
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* indexed with scoreboard.lineno[blame_entry.lno].
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*/
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const char *final_buf;
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unsigned long final_buf_size;
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/* linked list of blames */
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struct blame_entry *ent;
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/* look-up a line in the final buffer */
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int num_lines;
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int *lineno;
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};
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static inline int same_suspect(struct origin *a, struct origin *b)
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{
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if (a == b)
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return 1;
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if (a->commit != b->commit)
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return 0;
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return !strcmp(a->path, b->path);
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}
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static void sanity_check_refcnt(struct scoreboard *);
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/*
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* If two blame entries that are next to each other came from
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* contiguous lines in the same origin (i.e. <commit, path> pair),
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* merge them together.
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*/
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static void coalesce(struct scoreboard *sb)
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{
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struct blame_entry *ent, *next;
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for (ent = sb->ent; ent && (next = ent->next); ent = next) {
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if (same_suspect(ent->suspect, next->suspect) &&
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ent->guilty == next->guilty &&
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ent->s_lno + ent->num_lines == next->s_lno) {
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ent->num_lines += next->num_lines;
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ent->next = next->next;
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if (ent->next)
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ent->next->prev = ent;
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origin_decref(next->suspect);
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free(next);
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ent->score = 0;
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next = ent; /* again */
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}
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}
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if (DEBUG) /* sanity */
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sanity_check_refcnt(sb);
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}
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/*
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* Given a commit and a path in it, create a new origin structure.
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* The callers that add blame to the scoreboard should use
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* get_origin() to obtain shared, refcounted copy instead of calling
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* this function directly.
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*/
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static struct origin *make_origin(struct commit *commit, const char *path)
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{
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struct origin *o;
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o = xcalloc(1, sizeof(*o) + strlen(path) + 1);
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o->commit = commit;
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o->refcnt = 1;
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strcpy(o->path, path);
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return o;
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}
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/*
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* Locate an existing origin or create a new one.
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*/
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static struct origin *get_origin(struct scoreboard *sb,
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struct commit *commit,
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const char *path)
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{
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struct blame_entry *e;
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for (e = sb->ent; e; e = e->next) {
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if (e->suspect->commit == commit &&
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!strcmp(e->suspect->path, path))
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return origin_incref(e->suspect);
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}
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return make_origin(commit, path);
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}
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/*
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* Fill the blob_sha1 field of an origin if it hasn't, so that later
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* call to fill_origin_blob() can use it to locate the data. blob_sha1
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* for an origin is also used to pass the blame for the entire file to
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* the parent to detect the case where a child's blob is identical to
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* that of its parent's.
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*
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* This also fills origin->mode for corresponding tree path.
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*/
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static int fill_blob_sha1_and_mode(struct origin *origin)
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{
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if (!is_null_sha1(origin->blob_sha1))
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return 0;
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if (get_tree_entry(origin->commit->object.sha1,
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origin->path,
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origin->blob_sha1, &origin->mode))
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goto error_out;
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if (sha1_object_info(origin->blob_sha1, NULL) != OBJ_BLOB)
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goto error_out;
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return 0;
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error_out:
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hashclr(origin->blob_sha1);
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origin->mode = S_IFINVALID;
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return -1;
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}
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/*
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* We have an origin -- check if the same path exists in the
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* parent and return an origin structure to represent it.
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*/
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static struct origin *find_origin(struct scoreboard *sb,
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struct commit *parent,
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struct origin *origin)
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{
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struct origin *porigin = NULL;
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struct diff_options diff_opts;
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const char *paths[2];
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if (parent->util) {
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/*
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* Each commit object can cache one origin in that
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* commit. This is a freestanding copy of origin and
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* not refcounted.
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*/
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struct origin *cached = parent->util;
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if (!strcmp(cached->path, origin->path)) {
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/*
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* The same path between origin and its parent
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* without renaming -- the most common case.
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*/
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porigin = get_origin(sb, parent, cached->path);
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/*
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* If the origin was newly created (i.e. get_origin
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* would call make_origin if none is found in the
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* scoreboard), it does not know the blob_sha1/mode,
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* so copy it. Otherwise porigin was in the
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* scoreboard and already knows blob_sha1/mode.
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*/
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if (porigin->refcnt == 1) {
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hashcpy(porigin->blob_sha1, cached->blob_sha1);
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porigin->mode = cached->mode;
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}
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return porigin;
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}
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/* otherwise it was not very useful; free it */
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free(parent->util);
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parent->util = NULL;
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}
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/* See if the origin->path is different between parent
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* and origin first. Most of the time they are the
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* same and diff-tree is fairly efficient about this.
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*/
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diff_setup(&diff_opts);
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DIFF_OPT_SET(&diff_opts, RECURSIVE);
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diff_opts.detect_rename = 0;
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diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
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paths[0] = origin->path;
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paths[1] = NULL;
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diff_tree_setup_paths(paths, &diff_opts);
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if (diff_setup_done(&diff_opts) < 0)
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die("diff-setup");
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if (is_null_sha1(origin->commit->object.sha1))
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do_diff_cache(parent->tree->object.sha1, &diff_opts);
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else
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diff_tree_sha1(parent->tree->object.sha1,
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origin->commit->tree->object.sha1,
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"", &diff_opts);
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diffcore_std(&diff_opts);
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if (!diff_queued_diff.nr) {
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/* The path is the same as parent */
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porigin = get_origin(sb, parent, origin->path);
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hashcpy(porigin->blob_sha1, origin->blob_sha1);
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porigin->mode = origin->mode;
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} else {
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/*
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* Since origin->path is a pathspec, if the parent
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* commit had it as a directory, we will see a whole
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* bunch of deletion of files in the directory that we
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* do not care about.
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*/
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int i;
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struct diff_filepair *p = NULL;
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for (i = 0; i < diff_queued_diff.nr; i++) {
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const char *name;
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p = diff_queued_diff.queue[i];
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name = p->one->path ? p->one->path : p->two->path;
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if (!strcmp(name, origin->path))
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break;
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}
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if (!p)
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die("internal error in blame::find_origin");
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switch (p->status) {
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default:
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die("internal error in blame::find_origin (%c)",
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p->status);
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case 'M':
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porigin = get_origin(sb, parent, origin->path);
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hashcpy(porigin->blob_sha1, p->one->sha1);
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porigin->mode = p->one->mode;
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break;
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case 'A':
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case 'T':
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/* Did not exist in parent, or type changed */
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break;
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}
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}
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diff_flush(&diff_opts);
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diff_tree_release_paths(&diff_opts);
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if (porigin) {
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/*
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* Create a freestanding copy that is not part of
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* the refcounted origin found in the scoreboard, and
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* cache it in the commit.
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*/
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struct origin *cached;
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cached = make_origin(porigin->commit, porigin->path);
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hashcpy(cached->blob_sha1, porigin->blob_sha1);
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cached->mode = porigin->mode;
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parent->util = cached;
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}
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return porigin;
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}
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|
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/*
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* We have an origin -- find the path that corresponds to it in its
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* parent and return an origin structure to represent it.
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*/
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static struct origin *find_rename(struct scoreboard *sb,
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struct commit *parent,
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struct origin *origin)
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{
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struct origin *porigin = NULL;
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struct diff_options diff_opts;
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int i;
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const char *paths[2];
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diff_setup(&diff_opts);
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DIFF_OPT_SET(&diff_opts, RECURSIVE);
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diff_opts.detect_rename = DIFF_DETECT_RENAME;
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diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
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diff_opts.single_follow = origin->path;
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paths[0] = NULL;
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diff_tree_setup_paths(paths, &diff_opts);
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if (diff_setup_done(&diff_opts) < 0)
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die("diff-setup");
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if (is_null_sha1(origin->commit->object.sha1))
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do_diff_cache(parent->tree->object.sha1, &diff_opts);
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else
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diff_tree_sha1(parent->tree->object.sha1,
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origin->commit->tree->object.sha1,
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"", &diff_opts);
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diffcore_std(&diff_opts);
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for (i = 0; i < diff_queued_diff.nr; i++) {
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struct diff_filepair *p = diff_queued_diff.queue[i];
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if ((p->status == 'R' || p->status == 'C') &&
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!strcmp(p->two->path, origin->path)) {
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porigin = get_origin(sb, parent, p->one->path);
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hashcpy(porigin->blob_sha1, p->one->sha1);
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porigin->mode = p->one->mode;
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break;
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}
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}
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diff_flush(&diff_opts);
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diff_tree_release_paths(&diff_opts);
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return porigin;
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}
|
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|
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/*
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|
* Link in a new blame entry to the scoreboard. Entries that cover the
|
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* same line range have been removed from the scoreboard previously.
|
|
*/
|
|
static void add_blame_entry(struct scoreboard *sb, struct blame_entry *e)
|
|
{
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struct blame_entry *ent, *prev = NULL;
|
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origin_incref(e->suspect);
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|
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for (ent = sb->ent; ent && ent->lno < e->lno; ent = ent->next)
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prev = ent;
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|
|
/* prev, if not NULL, is the last one that is below e */
|
|
e->prev = prev;
|
|
if (prev) {
|
|
e->next = prev->next;
|
|
prev->next = e;
|
|
}
|
|
else {
|
|
e->next = sb->ent;
|
|
sb->ent = e;
|
|
}
|
|
if (e->next)
|
|
e->next->prev = e;
|
|
}
|
|
|
|
/*
|
|
* src typically is on-stack; we want to copy the information in it to
|
|
* a malloced blame_entry that is already on the linked list of the
|
|
* scoreboard. The origin of dst loses a refcnt while the origin of src
|
|
* gains one.
|
|
*/
|
|
static void dup_entry(struct blame_entry *dst, struct blame_entry *src)
|
|
{
|
|
struct blame_entry *p, *n;
|
|
|
|
p = dst->prev;
|
|
n = dst->next;
|
|
origin_incref(src->suspect);
|
|
origin_decref(dst->suspect);
|
|
memcpy(dst, src, sizeof(*src));
|
|
dst->prev = p;
|
|
dst->next = n;
|
|
dst->score = 0;
|
|
}
|
|
|
|
static const char *nth_line(struct scoreboard *sb, int lno)
|
|
{
|
|
return sb->final_buf + sb->lineno[lno];
|
|
}
|
|
|
|
/*
|
|
* It is known that lines between tlno to same came from parent, and e
|
|
* has an overlap with that range. it also is known that parent's
|
|
* line plno corresponds to e's line tlno.
|
|
*
|
|
* <---- e ----->
|
|
* <------>
|
|
* <------------>
|
|
* <------------>
|
|
* <------------------>
|
|
*
|
|
* Split e into potentially three parts; before this chunk, the chunk
|
|
* to be blamed for the parent, and after that portion.
|
|
*/
|
|
static void split_overlap(struct blame_entry *split,
|
|
struct blame_entry *e,
|
|
int tlno, int plno, int same,
|
|
struct origin *parent)
|
|
{
|
|
int chunk_end_lno;
|
|
memset(split, 0, sizeof(struct blame_entry [3]));
|
|
|
|
if (e->s_lno < tlno) {
|
|
/* there is a pre-chunk part not blamed on parent */
|
|
split[0].suspect = origin_incref(e->suspect);
|
|
split[0].lno = e->lno;
|
|
split[0].s_lno = e->s_lno;
|
|
split[0].num_lines = tlno - e->s_lno;
|
|
split[1].lno = e->lno + tlno - e->s_lno;
|
|
split[1].s_lno = plno;
|
|
}
|
|
else {
|
|
split[1].lno = e->lno;
|
|
split[1].s_lno = plno + (e->s_lno - tlno);
|
|
}
|
|
|
|
if (same < e->s_lno + e->num_lines) {
|
|
/* there is a post-chunk part not blamed on parent */
|
|
split[2].suspect = origin_incref(e->suspect);
|
|
split[2].lno = e->lno + (same - e->s_lno);
|
|
split[2].s_lno = e->s_lno + (same - e->s_lno);
|
|
split[2].num_lines = e->s_lno + e->num_lines - same;
|
|
chunk_end_lno = split[2].lno;
|
|
}
|
|
else
|
|
chunk_end_lno = e->lno + e->num_lines;
|
|
split[1].num_lines = chunk_end_lno - split[1].lno;
|
|
|
|
/*
|
|
* if it turns out there is nothing to blame the parent for,
|
|
* forget about the splitting. !split[1].suspect signals this.
|
|
*/
|
|
if (split[1].num_lines < 1)
|
|
return;
|
|
split[1].suspect = origin_incref(parent);
|
|
}
|
|
|
|
/*
|
|
* split_overlap() divided an existing blame e into up to three parts
|
|
* in split. Adjust the linked list of blames in the scoreboard to
|
|
* reflect the split.
|
|
*/
|
|
static void split_blame(struct scoreboard *sb,
|
|
struct blame_entry *split,
|
|
struct blame_entry *e)
|
|
{
|
|
struct blame_entry *new_entry;
|
|
|
|
if (split[0].suspect && split[2].suspect) {
|
|
/* The first part (reuse storage for the existing entry e) */
|
|
dup_entry(e, &split[0]);
|
|
|
|
/* The last part -- me */
|
|
new_entry = xmalloc(sizeof(*new_entry));
|
|
memcpy(new_entry, &(split[2]), sizeof(struct blame_entry));
|
|
add_blame_entry(sb, new_entry);
|
|
|
|
/* ... and the middle part -- parent */
|
|
new_entry = xmalloc(sizeof(*new_entry));
|
|
memcpy(new_entry, &(split[1]), sizeof(struct blame_entry));
|
|
add_blame_entry(sb, new_entry);
|
|
}
|
|
else if (!split[0].suspect && !split[2].suspect)
|
|
/*
|
|
* The parent covers the entire area; reuse storage for
|
|
* e and replace it with the parent.
|
|
*/
|
|
dup_entry(e, &split[1]);
|
|
else if (split[0].suspect) {
|
|
/* me and then parent */
|
|
dup_entry(e, &split[0]);
|
|
|
|
new_entry = xmalloc(sizeof(*new_entry));
|
|
memcpy(new_entry, &(split[1]), sizeof(struct blame_entry));
|
|
add_blame_entry(sb, new_entry);
|
|
}
|
|
else {
|
|
/* parent and then me */
|
|
dup_entry(e, &split[1]);
|
|
|
|
new_entry = xmalloc(sizeof(*new_entry));
|
|
memcpy(new_entry, &(split[2]), sizeof(struct blame_entry));
|
|
add_blame_entry(sb, new_entry);
|
|
}
|
|
|
|
if (DEBUG) { /* sanity */
|
|
struct blame_entry *ent;
|
|
int lno = sb->ent->lno, corrupt = 0;
|
|
|
|
for (ent = sb->ent; ent; ent = ent->next) {
|
|
if (lno != ent->lno)
|
|
corrupt = 1;
|
|
if (ent->s_lno < 0)
|
|
corrupt = 1;
|
|
lno += ent->num_lines;
|
|
}
|
|
if (corrupt) {
|
|
lno = sb->ent->lno;
|
|
for (ent = sb->ent; ent; ent = ent->next) {
|
|
printf("L %8d l %8d n %8d\n",
|
|
lno, ent->lno, ent->num_lines);
|
|
lno = ent->lno + ent->num_lines;
|
|
}
|
|
die("oops");
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* After splitting the blame, the origins used by the
|
|
* on-stack blame_entry should lose one refcnt each.
|
|
*/
|
|
static void decref_split(struct blame_entry *split)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 3; i++)
|
|
origin_decref(split[i].suspect);
|
|
}
|
|
|
|
/*
|
|
* Helper for blame_chunk(). blame_entry e is known to overlap with
|
|
* the patch hunk; split it and pass blame to the parent.
|
|
*/
|
|
static void blame_overlap(struct scoreboard *sb, struct blame_entry *e,
|
|
int tlno, int plno, int same,
|
|
struct origin *parent)
|
|
{
|
|
struct blame_entry split[3];
|
|
|
|
split_overlap(split, e, tlno, plno, same, parent);
|
|
if (split[1].suspect)
|
|
split_blame(sb, split, e);
|
|
decref_split(split);
|
|
}
|
|
|
|
/*
|
|
* Find the line number of the last line the target is suspected for.
|
|
*/
|
|
static int find_last_in_target(struct scoreboard *sb, struct origin *target)
|
|
{
|
|
struct blame_entry *e;
|
|
int last_in_target = -1;
|
|
|
|
for (e = sb->ent; e; e = e->next) {
|
|
if (e->guilty || !same_suspect(e->suspect, target))
|
|
continue;
|
|
if (last_in_target < e->s_lno + e->num_lines)
|
|
last_in_target = e->s_lno + e->num_lines;
|
|
}
|
|
return last_in_target;
|
|
}
|
|
|
|
/*
|
|
* Process one hunk from the patch between the current suspect for
|
|
* blame_entry e and its parent. Find and split the overlap, and
|
|
* pass blame to the overlapping part to the parent.
|
|
*/
|
|
static void blame_chunk(struct scoreboard *sb,
|
|
int tlno, int plno, int same,
|
|
struct origin *target, struct origin *parent)
|
|
{
|
|
struct blame_entry *e;
|
|
|
|
for (e = sb->ent; e; e = e->next) {
|
|
if (e->guilty || !same_suspect(e->suspect, target))
|
|
continue;
|
|
if (same <= e->s_lno)
|
|
continue;
|
|
if (tlno < e->s_lno + e->num_lines)
|
|
blame_overlap(sb, e, tlno, plno, same, parent);
|
|
}
|
|
}
|
|
|
|
struct blame_chunk_cb_data {
|
|
struct scoreboard *sb;
|
|
struct origin *target;
|
|
struct origin *parent;
|
|
long plno;
|
|
long tlno;
|
|
};
|
|
|
|
static int blame_chunk_cb(long start_a, long count_a,
|
|
long start_b, long count_b, void *data)
|
|
{
|
|
struct blame_chunk_cb_data *d = data;
|
|
blame_chunk(d->sb, d->tlno, d->plno, start_b, d->target, d->parent);
|
|
d->plno = start_a + count_a;
|
|
d->tlno = start_b + count_b;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We are looking at the origin 'target' and aiming to pass blame
|
|
* for the lines it is suspected to its parent. Run diff to find
|
|
* which lines came from parent and pass blame for them.
|
|
*/
|
|
static int pass_blame_to_parent(struct scoreboard *sb,
|
|
struct origin *target,
|
|
struct origin *parent)
|
|
{
|
|
int last_in_target;
|
|
mmfile_t file_p, file_o;
|
|
struct blame_chunk_cb_data d;
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
d.sb = sb; d.target = target; d.parent = parent;
|
|
last_in_target = find_last_in_target(sb, target);
|
|
if (last_in_target < 0)
|
|
return 1; /* nothing remains for this target */
|
|
|
|
fill_origin_blob(&sb->revs->diffopt, parent, &file_p);
|
|
fill_origin_blob(&sb->revs->diffopt, target, &file_o);
|
|
num_get_patch++;
|
|
|
|
diff_hunks(&file_p, &file_o, 0, blame_chunk_cb, &d);
|
|
/* The rest (i.e. anything after tlno) are the same as the parent */
|
|
blame_chunk(sb, d.tlno, d.plno, last_in_target, target, parent);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The lines in blame_entry after splitting blames many times can become
|
|
* very small and trivial, and at some point it becomes pointless to
|
|
* blame the parents. E.g. "\t\t}\n\t}\n\n" appears everywhere in any
|
|
* ordinary C program, and it is not worth to say it was copied from
|
|
* totally unrelated file in the parent.
|
|
*
|
|
* Compute how trivial the lines in the blame_entry are.
|
|
*/
|
|
static unsigned ent_score(struct scoreboard *sb, struct blame_entry *e)
|
|
{
|
|
unsigned score;
|
|
const char *cp, *ep;
|
|
|
|
if (e->score)
|
|
return e->score;
|
|
|
|
score = 1;
|
|
cp = nth_line(sb, e->lno);
|
|
ep = nth_line(sb, e->lno + e->num_lines);
|
|
while (cp < ep) {
|
|
unsigned ch = *((unsigned char *)cp);
|
|
if (isalnum(ch))
|
|
score++;
|
|
cp++;
|
|
}
|
|
e->score = score;
|
|
return score;
|
|
}
|
|
|
|
/*
|
|
* best_so_far[] and this[] are both a split of an existing blame_entry
|
|
* that passes blame to the parent. Maintain best_so_far the best split
|
|
* so far, by comparing this and best_so_far and copying this into
|
|
* bst_so_far as needed.
|
|
*/
|
|
static void copy_split_if_better(struct scoreboard *sb,
|
|
struct blame_entry *best_so_far,
|
|
struct blame_entry *this)
|
|
{
|
|
int i;
|
|
|
|
if (!this[1].suspect)
|
|
return;
|
|
if (best_so_far[1].suspect) {
|
|
if (ent_score(sb, &this[1]) < ent_score(sb, &best_so_far[1]))
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < 3; i++)
|
|
origin_incref(this[i].suspect);
|
|
decref_split(best_so_far);
|
|
memcpy(best_so_far, this, sizeof(struct blame_entry [3]));
|
|
}
|
|
|
|
/*
|
|
* We are looking at a part of the final image represented by
|
|
* ent (tlno and same are offset by ent->s_lno).
|
|
* tlno is where we are looking at in the final image.
|
|
* up to (but not including) same match preimage.
|
|
* plno is where we are looking at in the preimage.
|
|
*
|
|
* <-------------- final image ---------------------->
|
|
* <------ent------>
|
|
* ^tlno ^same
|
|
* <---------preimage----->
|
|
* ^plno
|
|
*
|
|
* All line numbers are 0-based.
|
|
*/
|
|
static void handle_split(struct scoreboard *sb,
|
|
struct blame_entry *ent,
|
|
int tlno, int plno, int same,
|
|
struct origin *parent,
|
|
struct blame_entry *split)
|
|
{
|
|
if (ent->num_lines <= tlno)
|
|
return;
|
|
if (tlno < same) {
|
|
struct blame_entry this[3];
|
|
tlno += ent->s_lno;
|
|
same += ent->s_lno;
|
|
split_overlap(this, ent, tlno, plno, same, parent);
|
|
copy_split_if_better(sb, split, this);
|
|
decref_split(this);
|
|
}
|
|
}
|
|
|
|
struct handle_split_cb_data {
|
|
struct scoreboard *sb;
|
|
struct blame_entry *ent;
|
|
struct origin *parent;
|
|
struct blame_entry *split;
|
|
long plno;
|
|
long tlno;
|
|
};
|
|
|
|
static int handle_split_cb(long start_a, long count_a,
|
|
long start_b, long count_b, void *data)
|
|
{
|
|
struct handle_split_cb_data *d = data;
|
|
handle_split(d->sb, d->ent, d->tlno, d->plno, start_b, d->parent,
|
|
d->split);
|
|
d->plno = start_a + count_a;
|
|
d->tlno = start_b + count_b;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Find the lines from parent that are the same as ent so that
|
|
* we can pass blames to it. file_p has the blob contents for
|
|
* the parent.
|
|
*/
|
|
static void find_copy_in_blob(struct scoreboard *sb,
|
|
struct blame_entry *ent,
|
|
struct origin *parent,
|
|
struct blame_entry *split,
|
|
mmfile_t *file_p)
|
|
{
|
|
const char *cp;
|
|
int cnt;
|
|
mmfile_t file_o;
|
|
struct handle_split_cb_data d;
|
|
|
|
memset(&d, 0, sizeof(d));
|
|
d.sb = sb; d.ent = ent; d.parent = parent; d.split = split;
|
|
/*
|
|
* Prepare mmfile that contains only the lines in ent.
|
|
*/
|
|
cp = nth_line(sb, ent->lno);
|
|
file_o.ptr = (char *) cp;
|
|
cnt = ent->num_lines;
|
|
|
|
while (cnt && cp < sb->final_buf + sb->final_buf_size) {
|
|
if (*cp++ == '\n')
|
|
cnt--;
|
|
}
|
|
file_o.size = cp - file_o.ptr;
|
|
|
|
/*
|
|
* file_o is a part of final image we are annotating.
|
|
* file_p partially may match that image.
|
|
*/
|
|
memset(split, 0, sizeof(struct blame_entry [3]));
|
|
diff_hunks(file_p, &file_o, 1, handle_split_cb, &d);
|
|
/* remainder, if any, all match the preimage */
|
|
handle_split(sb, ent, d.tlno, d.plno, ent->num_lines, parent, split);
|
|
}
|
|
|
|
/*
|
|
* See if lines currently target is suspected for can be attributed to
|
|
* parent.
|
|
*/
|
|
static int find_move_in_parent(struct scoreboard *sb,
|
|
struct origin *target,
|
|
struct origin *parent)
|
|
{
|
|
int last_in_target, made_progress;
|
|
struct blame_entry *e, split[3];
|
|
mmfile_t file_p;
|
|
|
|
last_in_target = find_last_in_target(sb, target);
|
|
if (last_in_target < 0)
|
|
return 1; /* nothing remains for this target */
|
|
|
|
fill_origin_blob(&sb->revs->diffopt, parent, &file_p);
|
|
if (!file_p.ptr)
|
|
return 0;
|
|
|
|
made_progress = 1;
|
|
while (made_progress) {
|
|
made_progress = 0;
|
|
for (e = sb->ent; e; e = e->next) {
|
|
if (e->guilty || !same_suspect(e->suspect, target) ||
|
|
ent_score(sb, e) < blame_move_score)
|
|
continue;
|
|
find_copy_in_blob(sb, e, parent, split, &file_p);
|
|
if (split[1].suspect &&
|
|
blame_move_score < ent_score(sb, &split[1])) {
|
|
split_blame(sb, split, e);
|
|
made_progress = 1;
|
|
}
|
|
decref_split(split);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct blame_list {
|
|
struct blame_entry *ent;
|
|
struct blame_entry split[3];
|
|
};
|
|
|
|
/*
|
|
* Count the number of entries the target is suspected for,
|
|
* and prepare a list of entry and the best split.
|
|
*/
|
|
static struct blame_list *setup_blame_list(struct scoreboard *sb,
|
|
struct origin *target,
|
|
int min_score,
|
|
int *num_ents_p)
|
|
{
|
|
struct blame_entry *e;
|
|
int num_ents, i;
|
|
struct blame_list *blame_list = NULL;
|
|
|
|
for (e = sb->ent, num_ents = 0; e; e = e->next)
|
|
if (!e->scanned && !e->guilty &&
|
|
same_suspect(e->suspect, target) &&
|
|
min_score < ent_score(sb, e))
|
|
num_ents++;
|
|
if (num_ents) {
|
|
blame_list = xcalloc(num_ents, sizeof(struct blame_list));
|
|
for (e = sb->ent, i = 0; e; e = e->next)
|
|
if (!e->scanned && !e->guilty &&
|
|
same_suspect(e->suspect, target) &&
|
|
min_score < ent_score(sb, e))
|
|
blame_list[i++].ent = e;
|
|
}
|
|
*num_ents_p = num_ents;
|
|
return blame_list;
|
|
}
|
|
|
|
/*
|
|
* Reset the scanned status on all entries.
|
|
*/
|
|
static void reset_scanned_flag(struct scoreboard *sb)
|
|
{
|
|
struct blame_entry *e;
|
|
for (e = sb->ent; e; e = e->next)
|
|
e->scanned = 0;
|
|
}
|
|
|
|
/*
|
|
* For lines target is suspected for, see if we can find code movement
|
|
* across file boundary from the parent commit. porigin is the path
|
|
* in the parent we already tried.
|
|
*/
|
|
static int find_copy_in_parent(struct scoreboard *sb,
|
|
struct origin *target,
|
|
struct commit *parent,
|
|
struct origin *porigin,
|
|
int opt)
|
|
{
|
|
struct diff_options diff_opts;
|
|
const char *paths[1];
|
|
int i, j;
|
|
int retval;
|
|
struct blame_list *blame_list;
|
|
int num_ents;
|
|
|
|
blame_list = setup_blame_list(sb, target, blame_copy_score, &num_ents);
|
|
if (!blame_list)
|
|
return 1; /* nothing remains for this target */
|
|
|
|
diff_setup(&diff_opts);
|
|
DIFF_OPT_SET(&diff_opts, RECURSIVE);
|
|
diff_opts.output_format = DIFF_FORMAT_NO_OUTPUT;
|
|
|
|
paths[0] = NULL;
|
|
diff_tree_setup_paths(paths, &diff_opts);
|
|
if (diff_setup_done(&diff_opts) < 0)
|
|
die("diff-setup");
|
|
|
|
/* Try "find copies harder" on new path if requested;
|
|
* we do not want to use diffcore_rename() actually to
|
|
* match things up; find_copies_harder is set only to
|
|
* force diff_tree_sha1() to feed all filepairs to diff_queue,
|
|
* and this code needs to be after diff_setup_done(), which
|
|
* usually makes find-copies-harder imply copy detection.
|
|
*/
|
|
if ((opt & PICKAXE_BLAME_COPY_HARDEST)
|
|
|| ((opt & PICKAXE_BLAME_COPY_HARDER)
|
|
&& (!porigin || strcmp(target->path, porigin->path))))
|
|
DIFF_OPT_SET(&diff_opts, FIND_COPIES_HARDER);
|
|
|
|
if (is_null_sha1(target->commit->object.sha1))
|
|
do_diff_cache(parent->tree->object.sha1, &diff_opts);
|
|
else
|
|
diff_tree_sha1(parent->tree->object.sha1,
|
|
target->commit->tree->object.sha1,
|
|
"", &diff_opts);
|
|
|
|
if (!DIFF_OPT_TST(&diff_opts, FIND_COPIES_HARDER))
|
|
diffcore_std(&diff_opts);
|
|
|
|
retval = 0;
|
|
while (1) {
|
|
int made_progress = 0;
|
|
|
|
for (i = 0; i < diff_queued_diff.nr; i++) {
|
|
struct diff_filepair *p = diff_queued_diff.queue[i];
|
|
struct origin *norigin;
|
|
mmfile_t file_p;
|
|
struct blame_entry this[3];
|
|
|
|
if (!DIFF_FILE_VALID(p->one))
|
|
continue; /* does not exist in parent */
|
|
if (S_ISGITLINK(p->one->mode))
|
|
continue; /* ignore git links */
|
|
if (porigin && !strcmp(p->one->path, porigin->path))
|
|
/* find_move already dealt with this path */
|
|
continue;
|
|
|
|
norigin = get_origin(sb, parent, p->one->path);
|
|
hashcpy(norigin->blob_sha1, p->one->sha1);
|
|
norigin->mode = p->one->mode;
|
|
fill_origin_blob(&sb->revs->diffopt, norigin, &file_p);
|
|
if (!file_p.ptr)
|
|
continue;
|
|
|
|
for (j = 0; j < num_ents; j++) {
|
|
find_copy_in_blob(sb, blame_list[j].ent,
|
|
norigin, this, &file_p);
|
|
copy_split_if_better(sb, blame_list[j].split,
|
|
this);
|
|
decref_split(this);
|
|
}
|
|
origin_decref(norigin);
|
|
}
|
|
|
|
for (j = 0; j < num_ents; j++) {
|
|
struct blame_entry *split = blame_list[j].split;
|
|
if (split[1].suspect &&
|
|
blame_copy_score < ent_score(sb, &split[1])) {
|
|
split_blame(sb, split, blame_list[j].ent);
|
|
made_progress = 1;
|
|
}
|
|
else
|
|
blame_list[j].ent->scanned = 1;
|
|
decref_split(split);
|
|
}
|
|
free(blame_list);
|
|
|
|
if (!made_progress)
|
|
break;
|
|
blame_list = setup_blame_list(sb, target, blame_copy_score, &num_ents);
|
|
if (!blame_list) {
|
|
retval = 1;
|
|
break;
|
|
}
|
|
}
|
|
reset_scanned_flag(sb);
|
|
diff_flush(&diff_opts);
|
|
diff_tree_release_paths(&diff_opts);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* The blobs of origin and porigin exactly match, so everything
|
|
* origin is suspected for can be blamed on the parent.
|
|
*/
|
|
static void pass_whole_blame(struct scoreboard *sb,
|
|
struct origin *origin, struct origin *porigin)
|
|
{
|
|
struct blame_entry *e;
|
|
|
|
if (!porigin->file.ptr && origin->file.ptr) {
|
|
/* Steal its file */
|
|
porigin->file = origin->file;
|
|
origin->file.ptr = NULL;
|
|
}
|
|
for (e = sb->ent; e; e = e->next) {
|
|
if (!same_suspect(e->suspect, origin))
|
|
continue;
|
|
origin_incref(porigin);
|
|
origin_decref(e->suspect);
|
|
e->suspect = porigin;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* We pass blame from the current commit to its parents. We keep saying
|
|
* "parent" (and "porigin"), but what we mean is to find scapegoat to
|
|
* exonerate ourselves.
|
|
*/
|
|
static struct commit_list *first_scapegoat(struct rev_info *revs, struct commit *commit)
|
|
{
|
|
if (!reverse)
|
|
return commit->parents;
|
|
return lookup_decoration(&revs->children, &commit->object);
|
|
}
|
|
|
|
static int num_scapegoats(struct rev_info *revs, struct commit *commit)
|
|
{
|
|
int cnt;
|
|
struct commit_list *l = first_scapegoat(revs, commit);
|
|
for (cnt = 0; l; l = l->next)
|
|
cnt++;
|
|
return cnt;
|
|
}
|
|
|
|
#define MAXSG 16
|
|
|
|
static void pass_blame(struct scoreboard *sb, struct origin *origin, int opt)
|
|
{
|
|
struct rev_info *revs = sb->revs;
|
|
int i, pass, num_sg;
|
|
struct commit *commit = origin->commit;
|
|
struct commit_list *sg;
|
|
struct origin *sg_buf[MAXSG];
|
|
struct origin *porigin, **sg_origin = sg_buf;
|
|
|
|
num_sg = num_scapegoats(revs, commit);
|
|
if (!num_sg)
|
|
goto finish;
|
|
else if (num_sg < ARRAY_SIZE(sg_buf))
|
|
memset(sg_buf, 0, sizeof(sg_buf));
|
|
else
|
|
sg_origin = xcalloc(num_sg, sizeof(*sg_origin));
|
|
|
|
/*
|
|
* The first pass looks for unrenamed path to optimize for
|
|
* common cases, then we look for renames in the second pass.
|
|
*/
|
|
for (pass = 0; pass < 2; pass++) {
|
|
struct origin *(*find)(struct scoreboard *,
|
|
struct commit *, struct origin *);
|
|
find = pass ? find_rename : find_origin;
|
|
|
|
for (i = 0, sg = first_scapegoat(revs, commit);
|
|
i < num_sg && sg;
|
|
sg = sg->next, i++) {
|
|
struct commit *p = sg->item;
|
|
int j, same;
|
|
|
|
if (sg_origin[i])
|
|
continue;
|
|
if (parse_commit(p))
|
|
continue;
|
|
porigin = find(sb, p, origin);
|
|
if (!porigin)
|
|
continue;
|
|
if (!hashcmp(porigin->blob_sha1, origin->blob_sha1)) {
|
|
pass_whole_blame(sb, origin, porigin);
|
|
origin_decref(porigin);
|
|
goto finish;
|
|
}
|
|
for (j = same = 0; j < i; j++)
|
|
if (sg_origin[j] &&
|
|
!hashcmp(sg_origin[j]->blob_sha1,
|
|
porigin->blob_sha1)) {
|
|
same = 1;
|
|
break;
|
|
}
|
|
if (!same)
|
|
sg_origin[i] = porigin;
|
|
else
|
|
origin_decref(porigin);
|
|
}
|
|
}
|
|
|
|
num_commits++;
|
|
for (i = 0, sg = first_scapegoat(revs, commit);
|
|
i < num_sg && sg;
|
|
sg = sg->next, i++) {
|
|
struct origin *porigin = sg_origin[i];
|
|
if (!porigin)
|
|
continue;
|
|
if (!origin->previous) {
|
|
origin_incref(porigin);
|
|
origin->previous = porigin;
|
|
}
|
|
if (pass_blame_to_parent(sb, origin, porigin))
|
|
goto finish;
|
|
}
|
|
|
|
/*
|
|
* Optionally find moves in parents' files.
|
|
*/
|
|
if (opt & PICKAXE_BLAME_MOVE)
|
|
for (i = 0, sg = first_scapegoat(revs, commit);
|
|
i < num_sg && sg;
|
|
sg = sg->next, i++) {
|
|
struct origin *porigin = sg_origin[i];
|
|
if (!porigin)
|
|
continue;
|
|
if (find_move_in_parent(sb, origin, porigin))
|
|
goto finish;
|
|
}
|
|
|
|
/*
|
|
* Optionally find copies from parents' files.
|
|
*/
|
|
if (opt & PICKAXE_BLAME_COPY)
|
|
for (i = 0, sg = first_scapegoat(revs, commit);
|
|
i < num_sg && sg;
|
|
sg = sg->next, i++) {
|
|
struct origin *porigin = sg_origin[i];
|
|
if (find_copy_in_parent(sb, origin, sg->item,
|
|
porigin, opt))
|
|
goto finish;
|
|
}
|
|
|
|
finish:
|
|
for (i = 0; i < num_sg; i++) {
|
|
if (sg_origin[i]) {
|
|
drop_origin_blob(sg_origin[i]);
|
|
origin_decref(sg_origin[i]);
|
|
}
|
|
}
|
|
drop_origin_blob(origin);
|
|
if (sg_buf != sg_origin)
|
|
free(sg_origin);
|
|
}
|
|
|
|
/*
|
|
* Information on commits, used for output.
|
|
*/
|
|
struct commit_info {
|
|
const char *author;
|
|
const char *author_mail;
|
|
unsigned long author_time;
|
|
const char *author_tz;
|
|
|
|
/* filled only when asked for details */
|
|
const char *committer;
|
|
const char *committer_mail;
|
|
unsigned long committer_time;
|
|
const char *committer_tz;
|
|
|
|
const char *summary;
|
|
};
|
|
|
|
/*
|
|
* Parse author/committer line in the commit object buffer
|
|
*/
|
|
static void get_ac_line(const char *inbuf, const char *what,
|
|
int person_len, char *person,
|
|
int mail_len, char *mail,
|
|
unsigned long *time, const char **tz)
|
|
{
|
|
int len, tzlen, maillen;
|
|
char *tmp, *endp, *timepos, *mailpos;
|
|
|
|
tmp = strstr(inbuf, what);
|
|
if (!tmp)
|
|
goto error_out;
|
|
tmp += strlen(what);
|
|
endp = strchr(tmp, '\n');
|
|
if (!endp)
|
|
len = strlen(tmp);
|
|
else
|
|
len = endp - tmp;
|
|
if (person_len <= len) {
|
|
error_out:
|
|
/* Ugh */
|
|
*tz = "(unknown)";
|
|
strcpy(person, *tz);
|
|
strcpy(mail, *tz);
|
|
*time = 0;
|
|
return;
|
|
}
|
|
memcpy(person, tmp, len);
|
|
|
|
tmp = person;
|
|
tmp += len;
|
|
*tmp = 0;
|
|
while (person < tmp && *tmp != ' ')
|
|
tmp--;
|
|
if (tmp <= person)
|
|
goto error_out;
|
|
*tz = tmp+1;
|
|
tzlen = (person+len)-(tmp+1);
|
|
|
|
*tmp = 0;
|
|
while (person < tmp && *tmp != ' ')
|
|
tmp--;
|
|
if (tmp <= person)
|
|
goto error_out;
|
|
*time = strtoul(tmp, NULL, 10);
|
|
timepos = tmp;
|
|
|
|
*tmp = 0;
|
|
while (person < tmp && !(*tmp == ' ' && tmp[1] == '<'))
|
|
tmp--;
|
|
if (tmp <= person)
|
|
return;
|
|
mailpos = tmp + 1;
|
|
*tmp = 0;
|
|
maillen = timepos - tmp;
|
|
memcpy(mail, mailpos, maillen);
|
|
|
|
if (!mailmap.nr)
|
|
return;
|
|
|
|
/*
|
|
* mailmap expansion may make the name longer.
|
|
* make room by pushing stuff down.
|
|
*/
|
|
tmp = person + person_len - (tzlen + 1);
|
|
memmove(tmp, *tz, tzlen);
|
|
tmp[tzlen] = 0;
|
|
*tz = tmp;
|
|
|
|
/*
|
|
* Now, convert both name and e-mail using mailmap
|
|
*/
|
|
if (map_user(&mailmap, mail+1, mail_len-1, person, tmp-person-1)) {
|
|
/* Add a trailing '>' to email, since map_user returns plain emails
|
|
Note: It already has '<', since we replace from mail+1 */
|
|
mailpos = memchr(mail, '\0', mail_len);
|
|
if (mailpos && mailpos-mail < mail_len - 1) {
|
|
*mailpos = '>';
|
|
*(mailpos+1) = '\0';
|
|
}
|
|
}
|
|
}
|
|
|
|
static void get_commit_info(struct commit *commit,
|
|
struct commit_info *ret,
|
|
int detailed)
|
|
{
|
|
int len;
|
|
const char *subject;
|
|
char *reencoded, *message;
|
|
static char author_name[1024];
|
|
static char author_mail[1024];
|
|
static char committer_name[1024];
|
|
static char committer_mail[1024];
|
|
static char summary_buf[1024];
|
|
|
|
/*
|
|
* We've operated without save_commit_buffer, so
|
|
* we now need to populate them for output.
|
|
*/
|
|
if (!commit->buffer) {
|
|
enum object_type type;
|
|
unsigned long size;
|
|
commit->buffer =
|
|
read_sha1_file(commit->object.sha1, &type, &size);
|
|
if (!commit->buffer)
|
|
die("Cannot read commit %s",
|
|
sha1_to_hex(commit->object.sha1));
|
|
}
|
|
reencoded = reencode_commit_message(commit, NULL);
|
|
message = reencoded ? reencoded : commit->buffer;
|
|
ret->author = author_name;
|
|
ret->author_mail = author_mail;
|
|
get_ac_line(message, "\nauthor ",
|
|
sizeof(author_name), author_name,
|
|
sizeof(author_mail), author_mail,
|
|
&ret->author_time, &ret->author_tz);
|
|
|
|
if (!detailed) {
|
|
free(reencoded);
|
|
return;
|
|
}
|
|
|
|
ret->committer = committer_name;
|
|
ret->committer_mail = committer_mail;
|
|
get_ac_line(message, "\ncommitter ",
|
|
sizeof(committer_name), committer_name,
|
|
sizeof(committer_mail), committer_mail,
|
|
&ret->committer_time, &ret->committer_tz);
|
|
|
|
ret->summary = summary_buf;
|
|
len = find_commit_subject(message, &subject);
|
|
if (len && len < sizeof(summary_buf)) {
|
|
memcpy(summary_buf, subject, len);
|
|
summary_buf[len] = 0;
|
|
} else {
|
|
sprintf(summary_buf, "(%s)", sha1_to_hex(commit->object.sha1));
|
|
}
|
|
free(reencoded);
|
|
}
|
|
|
|
/*
|
|
* To allow LF and other nonportable characters in pathnames,
|
|
* they are c-style quoted as needed.
|
|
*/
|
|
static void write_filename_info(const char *path)
|
|
{
|
|
printf("filename ");
|
|
write_name_quoted(path, stdout, '\n');
|
|
}
|
|
|
|
/*
|
|
* Porcelain/Incremental format wants to show a lot of details per
|
|
* commit. Instead of repeating this every line, emit it only once,
|
|
* the first time each commit appears in the output (unless the
|
|
* user has specifically asked for us to repeat).
|
|
*/
|
|
static int emit_one_suspect_detail(struct origin *suspect, int repeat)
|
|
{
|
|
struct commit_info ci;
|
|
|
|
if (!repeat && (suspect->commit->object.flags & METAINFO_SHOWN))
|
|
return 0;
|
|
|
|
suspect->commit->object.flags |= METAINFO_SHOWN;
|
|
get_commit_info(suspect->commit, &ci, 1);
|
|
printf("author %s\n", ci.author);
|
|
printf("author-mail %s\n", ci.author_mail);
|
|
printf("author-time %lu\n", ci.author_time);
|
|
printf("author-tz %s\n", ci.author_tz);
|
|
printf("committer %s\n", ci.committer);
|
|
printf("committer-mail %s\n", ci.committer_mail);
|
|
printf("committer-time %lu\n", ci.committer_time);
|
|
printf("committer-tz %s\n", ci.committer_tz);
|
|
printf("summary %s\n", ci.summary);
|
|
if (suspect->commit->object.flags & UNINTERESTING)
|
|
printf("boundary\n");
|
|
if (suspect->previous) {
|
|
struct origin *prev = suspect->previous;
|
|
printf("previous %s ", sha1_to_hex(prev->commit->object.sha1));
|
|
write_name_quoted(prev->path, stdout, '\n');
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* The blame_entry is found to be guilty for the range. Mark it
|
|
* as such, and show it in incremental output.
|
|
*/
|
|
static void found_guilty_entry(struct blame_entry *ent)
|
|
{
|
|
if (ent->guilty)
|
|
return;
|
|
ent->guilty = 1;
|
|
if (incremental) {
|
|
struct origin *suspect = ent->suspect;
|
|
|
|
printf("%s %d %d %d\n",
|
|
sha1_to_hex(suspect->commit->object.sha1),
|
|
ent->s_lno + 1, ent->lno + 1, ent->num_lines);
|
|
emit_one_suspect_detail(suspect, 0);
|
|
write_filename_info(suspect->path);
|
|
maybe_flush_or_die(stdout, "stdout");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* The main loop -- while the scoreboard has lines whose true origin
|
|
* is still unknown, pick one blame_entry, and allow its current
|
|
* suspect to pass blames to its parents.
|
|
*/
|
|
static void assign_blame(struct scoreboard *sb, int opt)
|
|
{
|
|
struct rev_info *revs = sb->revs;
|
|
|
|
while (1) {
|
|
struct blame_entry *ent;
|
|
struct commit *commit;
|
|
struct origin *suspect = NULL;
|
|
|
|
/* find one suspect to break down */
|
|
for (ent = sb->ent; !suspect && ent; ent = ent->next)
|
|
if (!ent->guilty)
|
|
suspect = ent->suspect;
|
|
if (!suspect)
|
|
return; /* all done */
|
|
|
|
/*
|
|
* We will use this suspect later in the loop,
|
|
* so hold onto it in the meantime.
|
|
*/
|
|
origin_incref(suspect);
|
|
commit = suspect->commit;
|
|
if (!commit->object.parsed)
|
|
parse_commit(commit);
|
|
if (reverse ||
|
|
(!(commit->object.flags & UNINTERESTING) &&
|
|
!(revs->max_age != -1 && commit->date < revs->max_age)))
|
|
pass_blame(sb, suspect, opt);
|
|
else {
|
|
commit->object.flags |= UNINTERESTING;
|
|
if (commit->object.parsed)
|
|
mark_parents_uninteresting(commit);
|
|
}
|
|
/* treat root commit as boundary */
|
|
if (!commit->parents && !show_root)
|
|
commit->object.flags |= UNINTERESTING;
|
|
|
|
/* Take responsibility for the remaining entries */
|
|
for (ent = sb->ent; ent; ent = ent->next)
|
|
if (same_suspect(ent->suspect, suspect))
|
|
found_guilty_entry(ent);
|
|
origin_decref(suspect);
|
|
|
|
if (DEBUG) /* sanity */
|
|
sanity_check_refcnt(sb);
|
|
}
|
|
}
|
|
|
|
static const char *format_time(unsigned long time, const char *tz_str,
|
|
int show_raw_time)
|
|
{
|
|
static char time_buf[128];
|
|
const char *time_str;
|
|
int time_len;
|
|
int tz;
|
|
|
|
if (show_raw_time) {
|
|
snprintf(time_buf, sizeof(time_buf), "%lu %s", time, tz_str);
|
|
}
|
|
else {
|
|
tz = atoi(tz_str);
|
|
time_str = show_date(time, tz, blame_date_mode);
|
|
time_len = strlen(time_str);
|
|
memcpy(time_buf, time_str, time_len);
|
|
memset(time_buf + time_len, ' ', blame_date_width - time_len);
|
|
}
|
|
return time_buf;
|
|
}
|
|
|
|
#define OUTPUT_ANNOTATE_COMPAT 001
|
|
#define OUTPUT_LONG_OBJECT_NAME 002
|
|
#define OUTPUT_RAW_TIMESTAMP 004
|
|
#define OUTPUT_PORCELAIN 010
|
|
#define OUTPUT_SHOW_NAME 020
|
|
#define OUTPUT_SHOW_NUMBER 040
|
|
#define OUTPUT_SHOW_SCORE 0100
|
|
#define OUTPUT_NO_AUTHOR 0200
|
|
#define OUTPUT_SHOW_EMAIL 0400
|
|
#define OUTPUT_LINE_PORCELAIN 01000
|
|
|
|
static void emit_porcelain_details(struct origin *suspect, int repeat)
|
|
{
|
|
if (emit_one_suspect_detail(suspect, repeat) ||
|
|
(suspect->commit->object.flags & MORE_THAN_ONE_PATH))
|
|
write_filename_info(suspect->path);
|
|
}
|
|
|
|
static void emit_porcelain(struct scoreboard *sb, struct blame_entry *ent,
|
|
int opt)
|
|
{
|
|
int repeat = opt & OUTPUT_LINE_PORCELAIN;
|
|
int cnt;
|
|
const char *cp;
|
|
struct origin *suspect = ent->suspect;
|
|
char hex[41];
|
|
|
|
strcpy(hex, sha1_to_hex(suspect->commit->object.sha1));
|
|
printf("%s%c%d %d %d\n",
|
|
hex,
|
|
ent->guilty ? ' ' : '*', /* purely for debugging */
|
|
ent->s_lno + 1,
|
|
ent->lno + 1,
|
|
ent->num_lines);
|
|
emit_porcelain_details(suspect, repeat);
|
|
|
|
cp = nth_line(sb, ent->lno);
|
|
for (cnt = 0; cnt < ent->num_lines; cnt++) {
|
|
char ch;
|
|
if (cnt) {
|
|
printf("%s %d %d\n", hex,
|
|
ent->s_lno + 1 + cnt,
|
|
ent->lno + 1 + cnt);
|
|
if (repeat)
|
|
emit_porcelain_details(suspect, 1);
|
|
}
|
|
putchar('\t');
|
|
do {
|
|
ch = *cp++;
|
|
putchar(ch);
|
|
} while (ch != '\n' &&
|
|
cp < sb->final_buf + sb->final_buf_size);
|
|
}
|
|
|
|
if (sb->final_buf_size && cp[-1] != '\n')
|
|
putchar('\n');
|
|
}
|
|
|
|
static void emit_other(struct scoreboard *sb, struct blame_entry *ent, int opt)
|
|
{
|
|
int cnt;
|
|
const char *cp;
|
|
struct origin *suspect = ent->suspect;
|
|
struct commit_info ci;
|
|
char hex[41];
|
|
int show_raw_time = !!(opt & OUTPUT_RAW_TIMESTAMP);
|
|
|
|
get_commit_info(suspect->commit, &ci, 1);
|
|
strcpy(hex, sha1_to_hex(suspect->commit->object.sha1));
|
|
|
|
cp = nth_line(sb, ent->lno);
|
|
for (cnt = 0; cnt < ent->num_lines; cnt++) {
|
|
char ch;
|
|
int length = (opt & OUTPUT_LONG_OBJECT_NAME) ? 40 : abbrev;
|
|
|
|
if (suspect->commit->object.flags & UNINTERESTING) {
|
|
if (blank_boundary)
|
|
memset(hex, ' ', length);
|
|
else if (!(opt & OUTPUT_ANNOTATE_COMPAT)) {
|
|
length--;
|
|
putchar('^');
|
|
}
|
|
}
|
|
|
|
printf("%.*s", length, hex);
|
|
if (opt & OUTPUT_ANNOTATE_COMPAT) {
|
|
const char *name;
|
|
if (opt & OUTPUT_SHOW_EMAIL)
|
|
name = ci.author_mail;
|
|
else
|
|
name = ci.author;
|
|
printf("\t(%10s\t%10s\t%d)", name,
|
|
format_time(ci.author_time, ci.author_tz,
|
|
show_raw_time),
|
|
ent->lno + 1 + cnt);
|
|
} else {
|
|
if (opt & OUTPUT_SHOW_SCORE)
|
|
printf(" %*d %02d",
|
|
max_score_digits, ent->score,
|
|
ent->suspect->refcnt);
|
|
if (opt & OUTPUT_SHOW_NAME)
|
|
printf(" %-*.*s", longest_file, longest_file,
|
|
suspect->path);
|
|
if (opt & OUTPUT_SHOW_NUMBER)
|
|
printf(" %*d", max_orig_digits,
|
|
ent->s_lno + 1 + cnt);
|
|
|
|
if (!(opt & OUTPUT_NO_AUTHOR)) {
|
|
const char *name;
|
|
int pad;
|
|
if (opt & OUTPUT_SHOW_EMAIL)
|
|
name = ci.author_mail;
|
|
else
|
|
name = ci.author;
|
|
pad = longest_author - utf8_strwidth(name);
|
|
printf(" (%s%*s %10s",
|
|
name, pad, "",
|
|
format_time(ci.author_time,
|
|
ci.author_tz,
|
|
show_raw_time));
|
|
}
|
|
printf(" %*d) ",
|
|
max_digits, ent->lno + 1 + cnt);
|
|
}
|
|
do {
|
|
ch = *cp++;
|
|
putchar(ch);
|
|
} while (ch != '\n' &&
|
|
cp < sb->final_buf + sb->final_buf_size);
|
|
}
|
|
|
|
if (sb->final_buf_size && cp[-1] != '\n')
|
|
putchar('\n');
|
|
}
|
|
|
|
static void output(struct scoreboard *sb, int option)
|
|
{
|
|
struct blame_entry *ent;
|
|
|
|
if (option & OUTPUT_PORCELAIN) {
|
|
for (ent = sb->ent; ent; ent = ent->next) {
|
|
struct blame_entry *oth;
|
|
struct origin *suspect = ent->suspect;
|
|
struct commit *commit = suspect->commit;
|
|
if (commit->object.flags & MORE_THAN_ONE_PATH)
|
|
continue;
|
|
for (oth = ent->next; oth; oth = oth->next) {
|
|
if ((oth->suspect->commit != commit) ||
|
|
!strcmp(oth->suspect->path, suspect->path))
|
|
continue;
|
|
commit->object.flags |= MORE_THAN_ONE_PATH;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (ent = sb->ent; ent; ent = ent->next) {
|
|
if (option & OUTPUT_PORCELAIN)
|
|
emit_porcelain(sb, ent, option);
|
|
else {
|
|
emit_other(sb, ent, option);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* To allow quick access to the contents of nth line in the
|
|
* final image, prepare an index in the scoreboard.
|
|
*/
|
|
static int prepare_lines(struct scoreboard *sb)
|
|
{
|
|
const char *buf = sb->final_buf;
|
|
unsigned long len = sb->final_buf_size;
|
|
int num = 0, incomplete = 0, bol = 1;
|
|
|
|
if (len && buf[len-1] != '\n')
|
|
incomplete++; /* incomplete line at the end */
|
|
while (len--) {
|
|
if (bol) {
|
|
sb->lineno = xrealloc(sb->lineno,
|
|
sizeof(int *) * (num + 1));
|
|
sb->lineno[num] = buf - sb->final_buf;
|
|
bol = 0;
|
|
}
|
|
if (*buf++ == '\n') {
|
|
num++;
|
|
bol = 1;
|
|
}
|
|
}
|
|
sb->lineno = xrealloc(sb->lineno,
|
|
sizeof(int *) * (num + incomplete + 1));
|
|
sb->lineno[num + incomplete] = buf - sb->final_buf;
|
|
sb->num_lines = num + incomplete;
|
|
return sb->num_lines;
|
|
}
|
|
|
|
/*
|
|
* Add phony grafts for use with -S; this is primarily to
|
|
* support git's cvsserver that wants to give a linear history
|
|
* to its clients.
|
|
*/
|
|
static int read_ancestry(const char *graft_file)
|
|
{
|
|
FILE *fp = fopen(graft_file, "r");
|
|
char buf[1024];
|
|
if (!fp)
|
|
return -1;
|
|
while (fgets(buf, sizeof(buf), fp)) {
|
|
/* The format is just "Commit Parent1 Parent2 ...\n" */
|
|
int len = strlen(buf);
|
|
struct commit_graft *graft = read_graft_line(buf, len);
|
|
if (graft)
|
|
register_commit_graft(graft, 0);
|
|
}
|
|
fclose(fp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* How many columns do we need to show line numbers, authors,
|
|
* and filenames?
|
|
*/
|
|
static void find_alignment(struct scoreboard *sb, int *option)
|
|
{
|
|
int longest_src_lines = 0;
|
|
int longest_dst_lines = 0;
|
|
unsigned largest_score = 0;
|
|
struct blame_entry *e;
|
|
|
|
for (e = sb->ent; e; e = e->next) {
|
|
struct origin *suspect = e->suspect;
|
|
struct commit_info ci;
|
|
int num;
|
|
|
|
if (strcmp(suspect->path, sb->path))
|
|
*option |= OUTPUT_SHOW_NAME;
|
|
num = strlen(suspect->path);
|
|
if (longest_file < num)
|
|
longest_file = num;
|
|
if (!(suspect->commit->object.flags & METAINFO_SHOWN)) {
|
|
suspect->commit->object.flags |= METAINFO_SHOWN;
|
|
get_commit_info(suspect->commit, &ci, 1);
|
|
if (*option & OUTPUT_SHOW_EMAIL)
|
|
num = utf8_strwidth(ci.author_mail);
|
|
else
|
|
num = utf8_strwidth(ci.author);
|
|
if (longest_author < num)
|
|
longest_author = num;
|
|
}
|
|
num = e->s_lno + e->num_lines;
|
|
if (longest_src_lines < num)
|
|
longest_src_lines = num;
|
|
num = e->lno + e->num_lines;
|
|
if (longest_dst_lines < num)
|
|
longest_dst_lines = num;
|
|
if (largest_score < ent_score(sb, e))
|
|
largest_score = ent_score(sb, e);
|
|
}
|
|
max_orig_digits = decimal_width(longest_src_lines);
|
|
max_digits = decimal_width(longest_dst_lines);
|
|
max_score_digits = decimal_width(largest_score);
|
|
}
|
|
|
|
/*
|
|
* For debugging -- origin is refcounted, and this asserts that
|
|
* we do not underflow.
|
|
*/
|
|
static void sanity_check_refcnt(struct scoreboard *sb)
|
|
{
|
|
int baa = 0;
|
|
struct blame_entry *ent;
|
|
|
|
for (ent = sb->ent; ent; ent = ent->next) {
|
|
/* Nobody should have zero or negative refcnt */
|
|
if (ent->suspect->refcnt <= 0) {
|
|
fprintf(stderr, "%s in %s has negative refcnt %d\n",
|
|
ent->suspect->path,
|
|
sha1_to_hex(ent->suspect->commit->object.sha1),
|
|
ent->suspect->refcnt);
|
|
baa = 1;
|
|
}
|
|
}
|
|
if (baa) {
|
|
int opt = 0160;
|
|
find_alignment(sb, &opt);
|
|
output(sb, opt);
|
|
die("Baa %d!", baa);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Used for the command line parsing; check if the path exists
|
|
* in the working tree.
|
|
*/
|
|
static int has_string_in_work_tree(const char *path)
|
|
{
|
|
struct stat st;
|
|
return !lstat(path, &st);
|
|
}
|
|
|
|
static unsigned parse_score(const char *arg)
|
|
{
|
|
char *end;
|
|
unsigned long score = strtoul(arg, &end, 10);
|
|
if (*end)
|
|
return 0;
|
|
return score;
|
|
}
|
|
|
|
static const char *add_prefix(const char *prefix, const char *path)
|
|
{
|
|
return prefix_path(prefix, prefix ? strlen(prefix) : 0, path);
|
|
}
|
|
|
|
/*
|
|
* Parsing of (comma separated) one item in the -L option
|
|
*/
|
|
static const char *parse_loc(const char *spec,
|
|
struct scoreboard *sb, long lno,
|
|
long begin, long *ret)
|
|
{
|
|
char *term;
|
|
const char *line;
|
|
long num;
|
|
int reg_error;
|
|
regex_t regexp;
|
|
regmatch_t match[1];
|
|
|
|
/* Allow "-L <something>,+20" to mean starting at <something>
|
|
* for 20 lines, or "-L <something>,-5" for 5 lines ending at
|
|
* <something>.
|
|
*/
|
|
if (1 < begin && (spec[0] == '+' || spec[0] == '-')) {
|
|
num = strtol(spec + 1, &term, 10);
|
|
if (term != spec + 1) {
|
|
if (spec[0] == '-')
|
|
num = 0 - num;
|
|
if (0 < num)
|
|
*ret = begin + num - 2;
|
|
else if (!num)
|
|
*ret = begin;
|
|
else
|
|
*ret = begin + num;
|
|
return term;
|
|
}
|
|
return spec;
|
|
}
|
|
num = strtol(spec, &term, 10);
|
|
if (term != spec) {
|
|
*ret = num;
|
|
return term;
|
|
}
|
|
if (spec[0] != '/')
|
|
return spec;
|
|
|
|
/* it could be a regexp of form /.../ */
|
|
for (term = (char *) spec + 1; *term && *term != '/'; term++) {
|
|
if (*term == '\\')
|
|
term++;
|
|
}
|
|
if (*term != '/')
|
|
return spec;
|
|
|
|
/* try [spec+1 .. term-1] as regexp */
|
|
*term = 0;
|
|
begin--; /* input is in human terms */
|
|
line = nth_line(sb, begin);
|
|
|
|
if (!(reg_error = regcomp(®exp, spec + 1, REG_NEWLINE)) &&
|
|
!(reg_error = regexec(®exp, line, 1, match, 0))) {
|
|
const char *cp = line + match[0].rm_so;
|
|
const char *nline;
|
|
|
|
while (begin++ < lno) {
|
|
nline = nth_line(sb, begin);
|
|
if (line <= cp && cp < nline)
|
|
break;
|
|
line = nline;
|
|
}
|
|
*ret = begin;
|
|
regfree(®exp);
|
|
*term++ = '/';
|
|
return term;
|
|
}
|
|
else {
|
|
char errbuf[1024];
|
|
regerror(reg_error, ®exp, errbuf, 1024);
|
|
die("-L parameter '%s': %s", spec + 1, errbuf);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Parsing of -L option
|
|
*/
|
|
static void prepare_blame_range(struct scoreboard *sb,
|
|
const char *bottomtop,
|
|
long lno,
|
|
long *bottom, long *top)
|
|
{
|
|
const char *term;
|
|
|
|
term = parse_loc(bottomtop, sb, lno, 1, bottom);
|
|
if (*term == ',') {
|
|
term = parse_loc(term + 1, sb, lno, *bottom + 1, top);
|
|
if (*term)
|
|
usage(blame_usage);
|
|
}
|
|
if (*term)
|
|
usage(blame_usage);
|
|
}
|
|
|
|
static int git_blame_config(const char *var, const char *value, void *cb)
|
|
{
|
|
if (!strcmp(var, "blame.showroot")) {
|
|
show_root = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
if (!strcmp(var, "blame.blankboundary")) {
|
|
blank_boundary = git_config_bool(var, value);
|
|
return 0;
|
|
}
|
|
if (!strcmp(var, "blame.date")) {
|
|
if (!value)
|
|
return config_error_nonbool(var);
|
|
blame_date_mode = parse_date_format(value);
|
|
return 0;
|
|
}
|
|
|
|
if (userdiff_config(var, value) < 0)
|
|
return -1;
|
|
|
|
return git_default_config(var, value, cb);
|
|
}
|
|
|
|
/*
|
|
* Prepare a dummy commit that represents the work tree (or staged) item.
|
|
* Note that annotating work tree item never works in the reverse.
|
|
*/
|
|
static struct commit *fake_working_tree_commit(struct diff_options *opt,
|
|
const char *path,
|
|
const char *contents_from)
|
|
{
|
|
struct commit *commit;
|
|
struct origin *origin;
|
|
unsigned char head_sha1[20];
|
|
struct strbuf buf = STRBUF_INIT;
|
|
const char *ident;
|
|
time_t now;
|
|
int size, len;
|
|
struct cache_entry *ce;
|
|
unsigned mode;
|
|
|
|
if (get_sha1("HEAD", head_sha1))
|
|
die("No such ref: HEAD");
|
|
|
|
time(&now);
|
|
commit = xcalloc(1, sizeof(*commit));
|
|
commit->parents = xcalloc(1, sizeof(*commit->parents));
|
|
commit->parents->item = lookup_commit_reference(head_sha1);
|
|
commit->object.parsed = 1;
|
|
commit->date = now;
|
|
commit->object.type = OBJ_COMMIT;
|
|
|
|
origin = make_origin(commit, path);
|
|
|
|
if (!contents_from || strcmp("-", contents_from)) {
|
|
struct stat st;
|
|
const char *read_from;
|
|
char *buf_ptr;
|
|
unsigned long buf_len;
|
|
|
|
if (contents_from) {
|
|
if (stat(contents_from, &st) < 0)
|
|
die_errno("Cannot stat '%s'", contents_from);
|
|
read_from = contents_from;
|
|
}
|
|
else {
|
|
if (lstat(path, &st) < 0)
|
|
die_errno("Cannot lstat '%s'", path);
|
|
read_from = path;
|
|
}
|
|
mode = canon_mode(st.st_mode);
|
|
|
|
switch (st.st_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
if (DIFF_OPT_TST(opt, ALLOW_TEXTCONV) &&
|
|
textconv_object(read_from, mode, null_sha1, &buf_ptr, &buf_len))
|
|
strbuf_attach(&buf, buf_ptr, buf_len, buf_len + 1);
|
|
else if (strbuf_read_file(&buf, read_from, st.st_size) != st.st_size)
|
|
die_errno("cannot open or read '%s'", read_from);
|
|
break;
|
|
case S_IFLNK:
|
|
if (strbuf_readlink(&buf, read_from, st.st_size) < 0)
|
|
die_errno("cannot readlink '%s'", read_from);
|
|
break;
|
|
default:
|
|
die("unsupported file type %s", read_from);
|
|
}
|
|
}
|
|
else {
|
|
/* Reading from stdin */
|
|
contents_from = "standard input";
|
|
mode = 0;
|
|
if (strbuf_read(&buf, 0, 0) < 0)
|
|
die_errno("failed to read from stdin");
|
|
}
|
|
convert_to_git(path, buf.buf, buf.len, &buf, 0);
|
|
origin->file.ptr = buf.buf;
|
|
origin->file.size = buf.len;
|
|
pretend_sha1_file(buf.buf, buf.len, OBJ_BLOB, origin->blob_sha1);
|
|
commit->util = origin;
|
|
|
|
/*
|
|
* Read the current index, replace the path entry with
|
|
* origin->blob_sha1 without mucking with its mode or type
|
|
* bits; we are not going to write this index out -- we just
|
|
* want to run "diff-index --cached".
|
|
*/
|
|
discard_cache();
|
|
read_cache();
|
|
|
|
len = strlen(path);
|
|
if (!mode) {
|
|
int pos = cache_name_pos(path, len);
|
|
if (0 <= pos)
|
|
mode = active_cache[pos]->ce_mode;
|
|
else
|
|
/* Let's not bother reading from HEAD tree */
|
|
mode = S_IFREG | 0644;
|
|
}
|
|
size = cache_entry_size(len);
|
|
ce = xcalloc(1, size);
|
|
hashcpy(ce->sha1, origin->blob_sha1);
|
|
memcpy(ce->name, path, len);
|
|
ce->ce_flags = create_ce_flags(len, 0);
|
|
ce->ce_mode = create_ce_mode(mode);
|
|
add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
|
|
|
|
/*
|
|
* We are not going to write this out, so this does not matter
|
|
* right now, but someday we might optimize diff-index --cached
|
|
* with cache-tree information.
|
|
*/
|
|
cache_tree_invalidate_path(active_cache_tree, path);
|
|
|
|
commit->buffer = xmalloc(400);
|
|
ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0);
|
|
snprintf(commit->buffer, 400,
|
|
"tree 0000000000000000000000000000000000000000\n"
|
|
"parent %s\n"
|
|
"author %s\n"
|
|
"committer %s\n\n"
|
|
"Version of %s from %s\n",
|
|
sha1_to_hex(head_sha1),
|
|
ident, ident, path, contents_from ? contents_from : path);
|
|
return commit;
|
|
}
|
|
|
|
static const char *prepare_final(struct scoreboard *sb)
|
|
{
|
|
int i;
|
|
const char *final_commit_name = NULL;
|
|
struct rev_info *revs = sb->revs;
|
|
|
|
/*
|
|
* There must be one and only one positive commit in the
|
|
* revs->pending array.
|
|
*/
|
|
for (i = 0; i < revs->pending.nr; i++) {
|
|
struct object *obj = revs->pending.objects[i].item;
|
|
if (obj->flags & UNINTERESTING)
|
|
continue;
|
|
while (obj->type == OBJ_TAG)
|
|
obj = deref_tag(obj, NULL, 0);
|
|
if (obj->type != OBJ_COMMIT)
|
|
die("Non commit %s?", revs->pending.objects[i].name);
|
|
if (sb->final)
|
|
die("More than one commit to dig from %s and %s?",
|
|
revs->pending.objects[i].name,
|
|
final_commit_name);
|
|
sb->final = (struct commit *) obj;
|
|
final_commit_name = revs->pending.objects[i].name;
|
|
}
|
|
return final_commit_name;
|
|
}
|
|
|
|
static const char *prepare_initial(struct scoreboard *sb)
|
|
{
|
|
int i;
|
|
const char *final_commit_name = NULL;
|
|
struct rev_info *revs = sb->revs;
|
|
|
|
/*
|
|
* There must be one and only one negative commit, and it must be
|
|
* the boundary.
|
|
*/
|
|
for (i = 0; i < revs->pending.nr; i++) {
|
|
struct object *obj = revs->pending.objects[i].item;
|
|
if (!(obj->flags & UNINTERESTING))
|
|
continue;
|
|
while (obj->type == OBJ_TAG)
|
|
obj = deref_tag(obj, NULL, 0);
|
|
if (obj->type != OBJ_COMMIT)
|
|
die("Non commit %s?", revs->pending.objects[i].name);
|
|
if (sb->final)
|
|
die("More than one commit to dig down to %s and %s?",
|
|
revs->pending.objects[i].name,
|
|
final_commit_name);
|
|
sb->final = (struct commit *) obj;
|
|
final_commit_name = revs->pending.objects[i].name;
|
|
}
|
|
if (!final_commit_name)
|
|
die("No commit to dig down to?");
|
|
return final_commit_name;
|
|
}
|
|
|
|
static int blame_copy_callback(const struct option *option, const char *arg, int unset)
|
|
{
|
|
int *opt = option->value;
|
|
|
|
/*
|
|
* -C enables copy from removed files;
|
|
* -C -C enables copy from existing files, but only
|
|
* when blaming a new file;
|
|
* -C -C -C enables copy from existing files for
|
|
* everybody
|
|
*/
|
|
if (*opt & PICKAXE_BLAME_COPY_HARDER)
|
|
*opt |= PICKAXE_BLAME_COPY_HARDEST;
|
|
if (*opt & PICKAXE_BLAME_COPY)
|
|
*opt |= PICKAXE_BLAME_COPY_HARDER;
|
|
*opt |= PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE;
|
|
|
|
if (arg)
|
|
blame_copy_score = parse_score(arg);
|
|
return 0;
|
|
}
|
|
|
|
static int blame_move_callback(const struct option *option, const char *arg, int unset)
|
|
{
|
|
int *opt = option->value;
|
|
|
|
*opt |= PICKAXE_BLAME_MOVE;
|
|
|
|
if (arg)
|
|
blame_move_score = parse_score(arg);
|
|
return 0;
|
|
}
|
|
|
|
static int blame_bottomtop_callback(const struct option *option, const char *arg, int unset)
|
|
{
|
|
const char **bottomtop = option->value;
|
|
if (!arg)
|
|
return -1;
|
|
if (*bottomtop)
|
|
die("More than one '-L n,m' option given");
|
|
*bottomtop = arg;
|
|
return 0;
|
|
}
|
|
|
|
int cmd_blame(int argc, const char **argv, const char *prefix)
|
|
{
|
|
struct rev_info revs;
|
|
const char *path;
|
|
struct scoreboard sb;
|
|
struct origin *o;
|
|
struct blame_entry *ent;
|
|
long dashdash_pos, bottom, top, lno;
|
|
const char *final_commit_name = NULL;
|
|
enum object_type type;
|
|
|
|
static const char *bottomtop = NULL;
|
|
static int output_option = 0, opt = 0;
|
|
static int show_stats = 0;
|
|
static const char *revs_file = NULL;
|
|
static const char *contents_from = NULL;
|
|
static const struct option options[] = {
|
|
OPT_BOOLEAN(0, "incremental", &incremental, "Show blame entries as we find them, incrementally"),
|
|
OPT_BOOLEAN('b', NULL, &blank_boundary, "Show blank SHA-1 for boundary commits (Default: off)"),
|
|
OPT_BOOLEAN(0, "root", &show_root, "Do not treat root commits as boundaries (Default: off)"),
|
|
OPT_BOOLEAN(0, "show-stats", &show_stats, "Show work cost statistics"),
|
|
OPT_BIT(0, "score-debug", &output_option, "Show output score for blame entries", OUTPUT_SHOW_SCORE),
|
|
OPT_BIT('f', "show-name", &output_option, "Show original filename (Default: auto)", OUTPUT_SHOW_NAME),
|
|
OPT_BIT('n', "show-number", &output_option, "Show original linenumber (Default: off)", OUTPUT_SHOW_NUMBER),
|
|
OPT_BIT('p', "porcelain", &output_option, "Show in a format designed for machine consumption", OUTPUT_PORCELAIN),
|
|
OPT_BIT(0, "line-porcelain", &output_option, "Show porcelain format with per-line commit information", OUTPUT_PORCELAIN|OUTPUT_LINE_PORCELAIN),
|
|
OPT_BIT('c', NULL, &output_option, "Use the same output mode as git-annotate (Default: off)", OUTPUT_ANNOTATE_COMPAT),
|
|
OPT_BIT('t', NULL, &output_option, "Show raw timestamp (Default: off)", OUTPUT_RAW_TIMESTAMP),
|
|
OPT_BIT('l', NULL, &output_option, "Show long commit SHA1 (Default: off)", OUTPUT_LONG_OBJECT_NAME),
|
|
OPT_BIT('s', NULL, &output_option, "Suppress author name and timestamp (Default: off)", OUTPUT_NO_AUTHOR),
|
|
OPT_BIT('e', "show-email", &output_option, "Show author email instead of name (Default: off)", OUTPUT_SHOW_EMAIL),
|
|
OPT_BIT('w', NULL, &xdl_opts, "Ignore whitespace differences", XDF_IGNORE_WHITESPACE),
|
|
OPT_BIT(0, "minimal", &xdl_opts, "Spend extra cycles to find better match", XDF_NEED_MINIMAL),
|
|
OPT_STRING('S', NULL, &revs_file, "file", "Use revisions from <file> instead of calling git-rev-list"),
|
|
OPT_STRING(0, "contents", &contents_from, "file", "Use <file>'s contents as the final image"),
|
|
{ OPTION_CALLBACK, 'C', NULL, &opt, "score", "Find line copies within and across files", PARSE_OPT_OPTARG, blame_copy_callback },
|
|
{ OPTION_CALLBACK, 'M', NULL, &opt, "score", "Find line movements within and across files", PARSE_OPT_OPTARG, blame_move_callback },
|
|
OPT_CALLBACK('L', NULL, &bottomtop, "n,m", "Process only line range n,m, counting from 1", blame_bottomtop_callback),
|
|
OPT__ABBREV(&abbrev),
|
|
OPT_END()
|
|
};
|
|
|
|
struct parse_opt_ctx_t ctx;
|
|
int cmd_is_annotate = !strcmp(argv[0], "annotate");
|
|
|
|
git_config(git_blame_config, NULL);
|
|
init_revisions(&revs, NULL);
|
|
revs.date_mode = blame_date_mode;
|
|
DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV);
|
|
|
|
save_commit_buffer = 0;
|
|
dashdash_pos = 0;
|
|
|
|
parse_options_start(&ctx, argc, argv, prefix, options,
|
|
PARSE_OPT_KEEP_DASHDASH | PARSE_OPT_KEEP_ARGV0);
|
|
for (;;) {
|
|
switch (parse_options_step(&ctx, options, blame_opt_usage)) {
|
|
case PARSE_OPT_HELP:
|
|
exit(129);
|
|
case PARSE_OPT_DONE:
|
|
if (ctx.argv[0])
|
|
dashdash_pos = ctx.cpidx;
|
|
goto parse_done;
|
|
}
|
|
|
|
if (!strcmp(ctx.argv[0], "--reverse")) {
|
|
ctx.argv[0] = "--children";
|
|
reverse = 1;
|
|
}
|
|
parse_revision_opt(&revs, &ctx, options, blame_opt_usage);
|
|
}
|
|
parse_done:
|
|
argc = parse_options_end(&ctx);
|
|
|
|
if (abbrev == -1)
|
|
abbrev = default_abbrev;
|
|
/* one more abbrev length is needed for the boundary commit */
|
|
abbrev++;
|
|
|
|
if (revs_file && read_ancestry(revs_file))
|
|
die_errno("reading graft file '%s' failed", revs_file);
|
|
|
|
if (cmd_is_annotate) {
|
|
output_option |= OUTPUT_ANNOTATE_COMPAT;
|
|
blame_date_mode = DATE_ISO8601;
|
|
} else {
|
|
blame_date_mode = revs.date_mode;
|
|
}
|
|
|
|
/* The maximum width used to show the dates */
|
|
switch (blame_date_mode) {
|
|
case DATE_RFC2822:
|
|
blame_date_width = sizeof("Thu, 19 Oct 2006 16:00:04 -0700");
|
|
break;
|
|
case DATE_ISO8601:
|
|
blame_date_width = sizeof("2006-10-19 16:00:04 -0700");
|
|
break;
|
|
case DATE_RAW:
|
|
blame_date_width = sizeof("1161298804 -0700");
|
|
break;
|
|
case DATE_SHORT:
|
|
blame_date_width = sizeof("2006-10-19");
|
|
break;
|
|
case DATE_RELATIVE:
|
|
/* "normal" is used as the fallback for "relative" */
|
|
case DATE_LOCAL:
|
|
case DATE_NORMAL:
|
|
blame_date_width = sizeof("Thu Oct 19 16:00:04 2006 -0700");
|
|
break;
|
|
}
|
|
blame_date_width -= 1; /* strip the null */
|
|
|
|
if (DIFF_OPT_TST(&revs.diffopt, FIND_COPIES_HARDER))
|
|
opt |= (PICKAXE_BLAME_COPY | PICKAXE_BLAME_MOVE |
|
|
PICKAXE_BLAME_COPY_HARDER);
|
|
|
|
if (!blame_move_score)
|
|
blame_move_score = BLAME_DEFAULT_MOVE_SCORE;
|
|
if (!blame_copy_score)
|
|
blame_copy_score = BLAME_DEFAULT_COPY_SCORE;
|
|
|
|
/*
|
|
* We have collected options unknown to us in argv[1..unk]
|
|
* which are to be passed to revision machinery if we are
|
|
* going to do the "bottom" processing.
|
|
*
|
|
* The remaining are:
|
|
*
|
|
* (1) if dashdash_pos != 0, it is either
|
|
* "blame [revisions] -- <path>" or
|
|
* "blame -- <path> <rev>"
|
|
*
|
|
* (2) otherwise, it is one of the two:
|
|
* "blame [revisions] <path>"
|
|
* "blame <path> <rev>"
|
|
*
|
|
* Note that we must strip out <path> from the arguments: we do not
|
|
* want the path pruning but we may want "bottom" processing.
|
|
*/
|
|
if (dashdash_pos) {
|
|
switch (argc - dashdash_pos - 1) {
|
|
case 2: /* (1b) */
|
|
if (argc != 4)
|
|
usage_with_options(blame_opt_usage, options);
|
|
/* reorder for the new way: <rev> -- <path> */
|
|
argv[1] = argv[3];
|
|
argv[3] = argv[2];
|
|
argv[2] = "--";
|
|
/* FALLTHROUGH */
|
|
case 1: /* (1a) */
|
|
path = add_prefix(prefix, argv[--argc]);
|
|
argv[argc] = NULL;
|
|
break;
|
|
default:
|
|
usage_with_options(blame_opt_usage, options);
|
|
}
|
|
} else {
|
|
if (argc < 2)
|
|
usage_with_options(blame_opt_usage, options);
|
|
path = add_prefix(prefix, argv[argc - 1]);
|
|
if (argc == 3 && !has_string_in_work_tree(path)) { /* (2b) */
|
|
path = add_prefix(prefix, argv[1]);
|
|
argv[1] = argv[2];
|
|
}
|
|
argv[argc - 1] = "--";
|
|
|
|
setup_work_tree();
|
|
if (!has_string_in_work_tree(path))
|
|
die_errno("cannot stat path '%s'", path);
|
|
}
|
|
|
|
revs.disable_stdin = 1;
|
|
setup_revisions(argc, argv, &revs, NULL);
|
|
memset(&sb, 0, sizeof(sb));
|
|
|
|
sb.revs = &revs;
|
|
if (!reverse)
|
|
final_commit_name = prepare_final(&sb);
|
|
else if (contents_from)
|
|
die("--contents and --children do not blend well.");
|
|
else
|
|
final_commit_name = prepare_initial(&sb);
|
|
|
|
if (!sb.final) {
|
|
/*
|
|
* "--not A B -- path" without anything positive;
|
|
* do not default to HEAD, but use the working tree
|
|
* or "--contents".
|
|
*/
|
|
setup_work_tree();
|
|
sb.final = fake_working_tree_commit(&sb.revs->diffopt,
|
|
path, contents_from);
|
|
add_pending_object(&revs, &(sb.final->object), ":");
|
|
}
|
|
else if (contents_from)
|
|
die("Cannot use --contents with final commit object name");
|
|
|
|
/*
|
|
* If we have bottom, this will mark the ancestors of the
|
|
* bottom commits we would reach while traversing as
|
|
* uninteresting.
|
|
*/
|
|
if (prepare_revision_walk(&revs))
|
|
die("revision walk setup failed");
|
|
|
|
if (is_null_sha1(sb.final->object.sha1)) {
|
|
char *buf;
|
|
o = sb.final->util;
|
|
buf = xmalloc(o->file.size + 1);
|
|
memcpy(buf, o->file.ptr, o->file.size + 1);
|
|
sb.final_buf = buf;
|
|
sb.final_buf_size = o->file.size;
|
|
}
|
|
else {
|
|
o = get_origin(&sb, sb.final, path);
|
|
if (fill_blob_sha1_and_mode(o))
|
|
die("no such path %s in %s", path, final_commit_name);
|
|
|
|
if (DIFF_OPT_TST(&sb.revs->diffopt, ALLOW_TEXTCONV) &&
|
|
textconv_object(path, o->mode, o->blob_sha1, (char **) &sb.final_buf,
|
|
&sb.final_buf_size))
|
|
;
|
|
else
|
|
sb.final_buf = read_sha1_file(o->blob_sha1, &type,
|
|
&sb.final_buf_size);
|
|
|
|
if (!sb.final_buf)
|
|
die("Cannot read blob %s for path %s",
|
|
sha1_to_hex(o->blob_sha1),
|
|
path);
|
|
}
|
|
num_read_blob++;
|
|
lno = prepare_lines(&sb);
|
|
|
|
bottom = top = 0;
|
|
if (bottomtop)
|
|
prepare_blame_range(&sb, bottomtop, lno, &bottom, &top);
|
|
if (bottom && top && top < bottom) {
|
|
long tmp;
|
|
tmp = top; top = bottom; bottom = tmp;
|
|
}
|
|
if (bottom < 1)
|
|
bottom = 1;
|
|
if (top < 1)
|
|
top = lno;
|
|
bottom--;
|
|
if (lno < top || lno < bottom)
|
|
die("file %s has only %lu lines", path, lno);
|
|
|
|
ent = xcalloc(1, sizeof(*ent));
|
|
ent->lno = bottom;
|
|
ent->num_lines = top - bottom;
|
|
ent->suspect = o;
|
|
ent->s_lno = bottom;
|
|
|
|
sb.ent = ent;
|
|
sb.path = path;
|
|
|
|
read_mailmap(&mailmap, NULL);
|
|
|
|
if (!incremental)
|
|
setup_pager();
|
|
|
|
assign_blame(&sb, opt);
|
|
|
|
if (incremental)
|
|
return 0;
|
|
|
|
coalesce(&sb);
|
|
|
|
if (!(output_option & OUTPUT_PORCELAIN))
|
|
find_alignment(&sb, &output_option);
|
|
|
|
output(&sb, output_option);
|
|
free((void *)sb.final_buf);
|
|
for (ent = sb.ent; ent; ) {
|
|
struct blame_entry *e = ent->next;
|
|
free(ent);
|
|
ent = e;
|
|
}
|
|
|
|
if (show_stats) {
|
|
printf("num read blob: %d\n", num_read_blob);
|
|
printf("num get patch: %d\n", num_get_patch);
|
|
printf("num commits: %d\n", num_commits);
|
|
}
|
|
return 0;
|
|
}
|