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f2ce9fde57
This is a halfway between debugging aid and a helper to write an
ultra-smart merge scripts. The new option takes a string that
consists of a list of "status" letters, and limits the diff
output to only those classes of changes, with two exceptions:
- A broken pair (aka "complete rewrite"), does not match D
(deleted) or N (created). Use B to look for them.
- The letter "A" in the diff-filter string does not match
anything itself, but causes the entire diff that contains
selected patches to be output (this behaviour is similar to
that of --pickaxe-all for the -S option).
For example,
$ git-rev-list HEAD |
git-diff-tree --stdin -s -v -B -C --diff-filter=BCR
shows a list of commits that have complete rewrite, copy, or
rename.
Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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*/
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#include "cache.h"
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#include "strbuf.h"
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#include "diff.h"
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static const char *pickaxe = NULL;
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static int pickaxe_opts = 0;
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static const char *orderfile = NULL;
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static const char *diff_filter = NULL;
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static int line_termination = '\n';
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static int inter_name_termination = '\t';
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static void flush_them(int ac, const char **av)
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{
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diffcore_std_no_resolve(av + 1,
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pickaxe, pickaxe_opts,
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orderfile, diff_filter);
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diff_flush(DIFF_FORMAT_PATCH);
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}
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static const char *diff_helper_usage =
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"git-diff-helper [-z] [-S<string>] [-O<orderfile>] paths...";
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int main(int ac, const char **av) {
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struct strbuf sb;
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const char *garbage_flush_format;
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strbuf_init(&sb);
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while (1 < ac && av[1][0] == '-') {
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if (av[1][1] == 'z')
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line_termination = inter_name_termination = 0;
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else if (av[1][1] == 'S') {
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pickaxe = av[1] + 2;
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}
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else if (!strcmp(av[1], "--pickaxe-all"))
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pickaxe_opts = DIFF_PICKAXE_ALL;
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else if (!strncmp(av[1], "--diff-filter=", 14))
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diff_filter = av[1] + 14;
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else if (!strncmp(av[1], "-O", 2))
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orderfile = av[1] + 2;
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else
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usage(diff_helper_usage);
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ac--; av++;
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}
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garbage_flush_format = (line_termination == 0) ? "%s" : "%s\n";
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/* the remaining parameters are paths patterns */
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diff_setup(0);
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while (1) {
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unsigned old_mode, new_mode;
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unsigned char old_sha1[20], new_sha1[20];
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char old_path[PATH_MAX];
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int status, score, two_paths;
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char new_path[PATH_MAX];
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int ch;
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char *cp, *ep;
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read_line(&sb, stdin, line_termination);
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if (sb.eof)
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break;
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switch (sb.buf[0]) {
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case ':':
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/* parse the first part up to the status */
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cp = sb.buf + 1;
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old_mode = new_mode = 0;
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while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
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old_mode = (old_mode << 3) | (ch - '0');
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cp++;
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}
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if (*cp++ != ' ')
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break;
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while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
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new_mode = (new_mode << 3) | (ch - '0');
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cp++;
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}
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if (*cp++ != ' ')
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break;
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if (get_sha1_hex(cp, old_sha1))
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break;
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cp += 40;
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if (*cp++ != ' ')
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break;
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if (get_sha1_hex(cp, new_sha1))
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break;
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cp += 40;
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if (*cp++ != ' ')
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break;
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status = *cp++;
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if (!strchr("MCRNDU", status))
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break;
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two_paths = score = 0;
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if (status == 'R' || status == 'C')
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two_paths = 1;
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/* pick up score if exists */
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if (sscanf(cp, "%d", &score) != 1)
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score = 0;
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cp = strchr(cp,
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inter_name_termination);
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if (!cp)
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break;
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if (*cp++ != inter_name_termination)
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break;
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/* first pathname */
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if (!line_termination) {
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read_line(&sb, stdin, line_termination);
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if (sb.eof)
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break;
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strcpy(old_path, sb.buf);
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}
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else if (!two_paths)
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strcpy(old_path, cp);
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else {
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ep = strchr(cp, inter_name_termination);
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if (!ep)
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break;
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strncpy(old_path, cp, ep-cp);
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old_path[ep-cp] = 0;
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cp = ep + 1;
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}
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/* second pathname */
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if (!two_paths)
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strcpy(new_path, old_path);
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else {
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if (!line_termination) {
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read_line(&sb, stdin,
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line_termination);
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if (sb.eof)
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break;
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strcpy(new_path, sb.buf);
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}
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else
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strcpy(new_path, cp);
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}
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diff_helper_input(old_mode, new_mode,
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old_sha1, new_sha1,
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old_path, status, score,
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new_path);
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continue;
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}
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flush_them(ac, av);
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printf(garbage_flush_format, sb.buf);
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}
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flush_them(ac, av);
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return 0;
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}
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