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git/builtin/ls-files.c
Junio C Hamano 4c4d9d9b65 Merge branch 'jc/ls-files-killed-optim'
"git ls-files -k" needs to crawl only the part of the working tree
that may overlap the paths in the index to find killed files, but
shared code with the logic to find all the untracked files, which
made it unnecessarily inefficient.

* jc/ls-files-killed-optim:
  dir.c::test_one_path(): work around directory_exists_in_index_icase() breakage
  t3010: update to demonstrate "ls-files -k" optimization pitfalls
  ls-files -k: a directory only can be killed if the index has a non-directory
  dir.c: use the cache_* macro to access the current index
2013-09-11 15:03:28 -07:00

594 lines
16 KiB
C

/*
* This merges the file listing in the directory cache index
* with the actual working directory list, and shows different
* combinations of the two.
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include "quote.h"
#include "dir.h"
#include "builtin.h"
#include "tree.h"
#include "parse-options.h"
#include "resolve-undo.h"
#include "string-list.h"
#include "pathspec.h"
static int abbrev;
static int show_deleted;
static int show_cached;
static int show_others;
static int show_stage;
static int show_unmerged;
static int show_resolve_undo;
static int show_modified;
static int show_killed;
static int show_valid_bit;
static int line_terminator = '\n';
static int debug_mode;
static const char *prefix;
static int max_prefix_len;
static int prefix_len;
static struct pathspec pathspec;
static int error_unmatch;
static char *ps_matched;
static const char *with_tree;
static int exc_given;
static int exclude_args;
static const char *tag_cached = "";
static const char *tag_unmerged = "";
static const char *tag_removed = "";
static const char *tag_other = "";
static const char *tag_killed = "";
static const char *tag_modified = "";
static const char *tag_skip_worktree = "";
static const char *tag_resolve_undo = "";
static void write_name(const char *name)
{
/*
* With "--full-name", prefix_len=0; this caller needs to pass
* an empty string in that case (a NULL is good for "").
*/
write_name_quoted_relative(name, prefix_len ? prefix : NULL,
stdout, line_terminator);
}
static void show_dir_entry(const char *tag, struct dir_entry *ent)
{
int len = max_prefix_len;
if (len >= ent->len)
die("git ls-files: internal error - directory entry not superset of prefix");
if (!match_pathspec_depth(&pathspec, ent->name, ent->len, len, ps_matched))
return;
fputs(tag, stdout);
write_name(ent->name);
}
static void show_other_files(struct dir_struct *dir)
{
int i;
for (i = 0; i < dir->nr; i++) {
struct dir_entry *ent = dir->entries[i];
if (!cache_name_is_other(ent->name, ent->len))
continue;
show_dir_entry(tag_other, ent);
}
}
static void show_killed_files(struct dir_struct *dir)
{
int i;
for (i = 0; i < dir->nr; i++) {
struct dir_entry *ent = dir->entries[i];
char *cp, *sp;
int pos, len, killed = 0;
for (cp = ent->name; cp - ent->name < ent->len; cp = sp + 1) {
sp = strchr(cp, '/');
if (!sp) {
/* If ent->name is prefix of an entry in the
* cache, it will be killed.
*/
pos = cache_name_pos(ent->name, ent->len);
if (0 <= pos)
die("bug in show-killed-files");
pos = -pos - 1;
while (pos < active_nr &&
ce_stage(active_cache[pos]))
pos++; /* skip unmerged */
if (active_nr <= pos)
break;
/* pos points at a name immediately after
* ent->name in the cache. Does it expect
* ent->name to be a directory?
*/
len = ce_namelen(active_cache[pos]);
if ((ent->len < len) &&
!strncmp(active_cache[pos]->name,
ent->name, ent->len) &&
active_cache[pos]->name[ent->len] == '/')
killed = 1;
break;
}
if (0 <= cache_name_pos(ent->name, sp - ent->name)) {
/* If any of the leading directories in
* ent->name is registered in the cache,
* ent->name will be killed.
*/
killed = 1;
break;
}
}
if (killed)
show_dir_entry(tag_killed, dir->entries[i]);
}
}
static void show_ce_entry(const char *tag, const struct cache_entry *ce)
{
int len = max_prefix_len;
if (len >= ce_namelen(ce))
die("git ls-files: internal error - cache entry not superset of prefix");
if (!match_pathspec_depth(&pathspec, ce->name, ce_namelen(ce), len, ps_matched))
return;
if (tag && *tag && show_valid_bit &&
(ce->ce_flags & CE_VALID)) {
static char alttag[4];
memcpy(alttag, tag, 3);
if (isalpha(tag[0]))
alttag[0] = tolower(tag[0]);
else if (tag[0] == '?')
alttag[0] = '!';
else {
alttag[0] = 'v';
alttag[1] = tag[0];
alttag[2] = ' ';
alttag[3] = 0;
}
tag = alttag;
}
if (!show_stage) {
fputs(tag, stdout);
} else {
printf("%s%06o %s %d\t",
tag,
ce->ce_mode,
find_unique_abbrev(ce->sha1,abbrev),
ce_stage(ce));
}
write_name(ce->name);
if (debug_mode) {
const struct stat_data *sd = &ce->ce_stat_data;
printf(" ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec);
printf(" mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec);
printf(" dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino);
printf(" uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid);
printf(" size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags);
}
}
static void show_ru_info(void)
{
struct string_list_item *item;
if (!the_index.resolve_undo)
return;
for_each_string_list_item(item, the_index.resolve_undo) {
const char *path = item->string;
struct resolve_undo_info *ui = item->util;
int i, len;
len = strlen(path);
if (len < max_prefix_len)
continue; /* outside of the prefix */
if (!match_pathspec_depth(&pathspec, path, len, max_prefix_len, ps_matched))
continue; /* uninterested */
for (i = 0; i < 3; i++) {
if (!ui->mode[i])
continue;
printf("%s%06o %s %d\t", tag_resolve_undo, ui->mode[i],
find_unique_abbrev(ui->sha1[i], abbrev),
i + 1);
write_name(path);
}
}
}
static int ce_excluded(struct dir_struct *dir, const struct cache_entry *ce)
{
int dtype = ce_to_dtype(ce);
return is_excluded(dir, ce->name, &dtype);
}
static void show_files(struct dir_struct *dir)
{
int i;
/* For cached/deleted files we don't need to even do the readdir */
if (show_others || show_killed) {
if (!show_others)
dir->flags |= DIR_COLLECT_KILLED_ONLY;
fill_directory(dir, &pathspec);
if (show_others)
show_other_files(dir);
if (show_killed)
show_killed_files(dir);
}
if (show_cached || show_stage) {
for (i = 0; i < active_nr; i++) {
const struct cache_entry *ce = active_cache[i];
if ((dir->flags & DIR_SHOW_IGNORED) &&
!ce_excluded(dir, ce))
continue;
if (show_unmerged && !ce_stage(ce))
continue;
if (ce->ce_flags & CE_UPDATE)
continue;
show_ce_entry(ce_stage(ce) ? tag_unmerged :
(ce_skip_worktree(ce) ? tag_skip_worktree : tag_cached), ce);
}
}
if (show_deleted || show_modified) {
for (i = 0; i < active_nr; i++) {
const struct cache_entry *ce = active_cache[i];
struct stat st;
int err;
if ((dir->flags & DIR_SHOW_IGNORED) &&
!ce_excluded(dir, ce))
continue;
if (ce->ce_flags & CE_UPDATE)
continue;
if (ce_skip_worktree(ce))
continue;
err = lstat(ce->name, &st);
if (show_deleted && err)
show_ce_entry(tag_removed, ce);
if (show_modified && ce_modified(ce, &st, 0))
show_ce_entry(tag_modified, ce);
}
}
}
/*
* Prune the index to only contain stuff starting with "prefix"
*/
static void prune_cache(const char *prefix)
{
int pos = cache_name_pos(prefix, max_prefix_len);
unsigned int first, last;
if (pos < 0)
pos = -pos-1;
memmove(active_cache, active_cache + pos,
(active_nr - pos) * sizeof(struct cache_entry *));
active_nr -= pos;
first = 0;
last = active_nr;
while (last > first) {
int next = (last + first) >> 1;
const struct cache_entry *ce = active_cache[next];
if (!strncmp(ce->name, prefix, max_prefix_len)) {
first = next+1;
continue;
}
last = next;
}
active_nr = last;
}
/*
* Read the tree specified with --with-tree option
* (typically, HEAD) into stage #1 and then
* squash them down to stage #0. This is used for
* --error-unmatch to list and check the path patterns
* that were given from the command line. We are not
* going to write this index out.
*/
void overlay_tree_on_cache(const char *tree_name, const char *prefix)
{
struct tree *tree;
unsigned char sha1[20];
struct pathspec pathspec;
struct cache_entry *last_stage0 = NULL;
int i;
if (get_sha1(tree_name, sha1))
die("tree-ish %s not found.", tree_name);
tree = parse_tree_indirect(sha1);
if (!tree)
die("bad tree-ish %s", tree_name);
/* Hoist the unmerged entries up to stage #3 to make room */
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
if (!ce_stage(ce))
continue;
ce->ce_flags |= CE_STAGEMASK;
}
if (prefix) {
static const char *(matchbuf[1]);
matchbuf[0] = NULL;
parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC,
PATHSPEC_PREFER_CWD, prefix, matchbuf);
} else
memset(&pathspec, 0, sizeof(pathspec));
if (read_tree(tree, 1, &pathspec))
die("unable to read tree entries %s", tree_name);
for (i = 0; i < active_nr; i++) {
struct cache_entry *ce = active_cache[i];
switch (ce_stage(ce)) {
case 0:
last_stage0 = ce;
/* fallthru */
default:
continue;
case 1:
/*
* If there is stage #0 entry for this, we do not
* need to show it. We use CE_UPDATE bit to mark
* such an entry.
*/
if (last_stage0 &&
!strcmp(last_stage0->name, ce->name))
ce->ce_flags |= CE_UPDATE;
}
}
}
int report_path_error(const char *ps_matched,
const struct pathspec *pathspec,
const char *prefix)
{
/*
* Make sure all pathspec matched; otherwise it is an error.
*/
struct strbuf sb = STRBUF_INIT;
int num, errors = 0;
for (num = 0; num < pathspec->nr; num++) {
int other, found_dup;
if (ps_matched[num])
continue;
/*
* The caller might have fed identical pathspec
* twice. Do not barf on such a mistake.
* FIXME: parse_pathspec should have eliminated
* duplicate pathspec.
*/
for (found_dup = other = 0;
!found_dup && other < pathspec->nr;
other++) {
if (other == num || !ps_matched[other])
continue;
if (!strcmp(pathspec->items[other].original,
pathspec->items[num].original))
/*
* Ok, we have a match already.
*/
found_dup = 1;
}
if (found_dup)
continue;
error("pathspec '%s' did not match any file(s) known to git.",
pathspec->items[num].original);
errors++;
}
strbuf_release(&sb);
return errors;
}
static const char * const ls_files_usage[] = {
N_("git ls-files [options] [<file>...]"),
NULL
};
static int option_parse_z(const struct option *opt,
const char *arg, int unset)
{
line_terminator = unset ? '\n' : '\0';
return 0;
}
static int option_parse_exclude(const struct option *opt,
const char *arg, int unset)
{
struct string_list *exclude_list = opt->value;
exc_given = 1;
string_list_append(exclude_list, arg);
return 0;
}
static int option_parse_exclude_from(const struct option *opt,
const char *arg, int unset)
{
struct dir_struct *dir = opt->value;
exc_given = 1;
add_excludes_from_file(dir, arg);
return 0;
}
static int option_parse_exclude_standard(const struct option *opt,
const char *arg, int unset)
{
struct dir_struct *dir = opt->value;
exc_given = 1;
setup_standard_excludes(dir);
return 0;
}
int cmd_ls_files(int argc, const char **argv, const char *cmd_prefix)
{
int require_work_tree = 0, show_tag = 0, i;
const char *max_prefix;
struct dir_struct dir;
struct exclude_list *el;
struct string_list exclude_list = STRING_LIST_INIT_NODUP;
struct option builtin_ls_files_options[] = {
{ OPTION_CALLBACK, 'z', NULL, NULL, NULL,
N_("paths are separated with NUL character"),
PARSE_OPT_NOARG, option_parse_z },
OPT_BOOL('t', NULL, &show_tag,
N_("identify the file status with tags")),
OPT_BOOL('v', NULL, &show_valid_bit,
N_("use lowercase letters for 'assume unchanged' files")),
OPT_BOOL('c', "cached", &show_cached,
N_("show cached files in the output (default)")),
OPT_BOOL('d', "deleted", &show_deleted,
N_("show deleted files in the output")),
OPT_BOOL('m', "modified", &show_modified,
N_("show modified files in the output")),
OPT_BOOL('o', "others", &show_others,
N_("show other files in the output")),
OPT_BIT('i', "ignored", &dir.flags,
N_("show ignored files in the output"),
DIR_SHOW_IGNORED),
OPT_BOOL('s', "stage", &show_stage,
N_("show staged contents' object name in the output")),
OPT_BOOL('k', "killed", &show_killed,
N_("show files on the filesystem that need to be removed")),
OPT_BIT(0, "directory", &dir.flags,
N_("show 'other' directories' name only"),
DIR_SHOW_OTHER_DIRECTORIES),
OPT_NEGBIT(0, "empty-directory", &dir.flags,
N_("don't show empty directories"),
DIR_HIDE_EMPTY_DIRECTORIES),
OPT_BOOL('u', "unmerged", &show_unmerged,
N_("show unmerged files in the output")),
OPT_BOOL(0, "resolve-undo", &show_resolve_undo,
N_("show resolve-undo information")),
{ OPTION_CALLBACK, 'x', "exclude", &exclude_list, N_("pattern"),
N_("skip files matching pattern"),
0, option_parse_exclude },
{ OPTION_CALLBACK, 'X', "exclude-from", &dir, N_("file"),
N_("exclude patterns are read from <file>"),
0, option_parse_exclude_from },
OPT_STRING(0, "exclude-per-directory", &dir.exclude_per_dir, N_("file"),
N_("read additional per-directory exclude patterns in <file>")),
{ OPTION_CALLBACK, 0, "exclude-standard", &dir, NULL,
N_("add the standard git exclusions"),
PARSE_OPT_NOARG, option_parse_exclude_standard },
{ OPTION_SET_INT, 0, "full-name", &prefix_len, NULL,
N_("make the output relative to the project top directory"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL },
OPT_BOOL(0, "error-unmatch", &error_unmatch,
N_("if any <file> is not in the index, treat this as an error")),
OPT_STRING(0, "with-tree", &with_tree, N_("tree-ish"),
N_("pretend that paths removed since <tree-ish> are still present")),
OPT__ABBREV(&abbrev),
OPT_BOOL(0, "debug", &debug_mode, N_("show debugging data")),
OPT_END()
};
if (argc == 2 && !strcmp(argv[1], "-h"))
usage_with_options(ls_files_usage, builtin_ls_files_options);
memset(&dir, 0, sizeof(dir));
prefix = cmd_prefix;
if (prefix)
prefix_len = strlen(prefix);
git_config(git_default_config, NULL);
if (read_cache() < 0)
die("index file corrupt");
argc = parse_options(argc, argv, prefix, builtin_ls_files_options,
ls_files_usage, 0);
el = add_exclude_list(&dir, EXC_CMDL, "--exclude option");
for (i = 0; i < exclude_list.nr; i++) {
add_exclude(exclude_list.items[i].string, "", 0, el, --exclude_args);
}
if (show_tag || show_valid_bit) {
tag_cached = "H ";
tag_unmerged = "M ";
tag_removed = "R ";
tag_modified = "C ";
tag_other = "? ";
tag_killed = "K ";
tag_skip_worktree = "S ";
tag_resolve_undo = "U ";
}
if (show_modified || show_others || show_deleted || (dir.flags & DIR_SHOW_IGNORED) || show_killed)
require_work_tree = 1;
if (show_unmerged)
/*
* There's no point in showing unmerged unless
* you also show the stage information.
*/
show_stage = 1;
if (dir.exclude_per_dir)
exc_given = 1;
if (require_work_tree && !is_inside_work_tree())
setup_work_tree();
parse_pathspec(&pathspec, 0,
PATHSPEC_PREFER_CWD |
PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP,
prefix, argv);
/* Find common prefix for all pathspec's */
max_prefix = common_prefix(&pathspec);
max_prefix_len = max_prefix ? strlen(max_prefix) : 0;
/* Treat unmatching pathspec elements as errors */
if (pathspec.nr && error_unmatch)
ps_matched = xcalloc(1, pathspec.nr);
if ((dir.flags & DIR_SHOW_IGNORED) && !exc_given)
die("ls-files --ignored needs some exclude pattern");
/* With no flags, we default to showing the cached files */
if (!(show_stage || show_deleted || show_others || show_unmerged ||
show_killed || show_modified || show_resolve_undo))
show_cached = 1;
if (max_prefix)
prune_cache(max_prefix);
if (with_tree) {
/*
* Basic sanity check; show-stages and show-unmerged
* would not make any sense with this option.
*/
if (show_stage || show_unmerged)
die("ls-files --with-tree is incompatible with -s or -u");
overlay_tree_on_cache(with_tree, max_prefix);
}
show_files(&dir);
if (show_resolve_undo)
show_ru_info();
if (ps_matched) {
int bad;
bad = report_path_error(ps_matched, &pathspec, prefix);
if (bad)
fprintf(stderr, "Did you forget to 'git add'?\n");
return bad ? 1 : 0;
}
return 0;
}