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refactor handling of "other" files in ls-files and status

When the "git status" display code was originally converted
to C, we copied the code from ls-files to discover whether a
pathname returned by read_directory was an "other", or
untracked, file.

Much later, 5698454 updated the code in ls-files to handle
some new cases caused by gitlinks.  This left the code in
wt-status.c broken: it would display submodule directories
as untracked directories. Nobody noticed until now, however,
because unless status.showUntrackedFiles was set to "all",
submodule directories were not actually reported by
read_directory. So the bug was only triggered in the
presence of a submodule _and_ this config option.

This patch pulls the ls-files code into a new function,
cache_name_is_other, and uses it in both places. This should
leave the ls-files functionality the same and fix the bug
in status.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 8ed0a74 commit 98fa473887d0bebd38d568bb07232a336a642dcf @peff peff committed with gitster Oct 16, 2008
Showing with 40 additions and 44 deletions.
  1. +2 −31 builtin-ls-files.c
  2. +2 −0 cache.h
  3. +28 −0 read-cache.c
  4. +6 −0 t/t7502-status.sh
  5. +2 −13 wt-status.c
View
@@ -91,39 +91,10 @@ static void show_other_files(struct dir_struct *dir)
{
int i;
-
- /*
- * Skip matching and unmerged entries for the paths,
- * since we want just "others".
- *
- * (Matching entries are normally pruned during
- * the directory tree walk, but will show up for
- * gitlinks because we don't necessarily have
- * dir->show_other_directories set to suppress
- * them).
- */
for (i = 0; i < dir->nr; i++) {
struct dir_entry *ent = dir->entries[i];
- int len, pos;
- struct cache_entry *ce;
-
- /*
- * Remove the '/' at the end that directory
- * walking adds for directory entries.
- */
- len = ent->len;
- if (len && ent->name[len-1] == '/')
- len--;
- pos = cache_name_pos(ent->name, len);
- if (0 <= pos)
- continue; /* exact match */
- pos = -pos - 1;
- if (pos < active_nr) {
- ce = active_cache[pos];
- if (ce_namelen(ce) == len &&
- !memcmp(ce->name, ent->name, len))
- continue; /* Yup, this one exists unmerged */
- }
+ if (!cache_name_is_other(ent->name, ent->len))
+ continue;
show_dir_entry(tag_other, ent);
}
}
View
@@ -270,6 +270,7 @@ static inline void remove_name_hash(struct cache_entry *ce)
#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options))
#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options))
#define cache_name_exists(name, namelen, igncase) index_name_exists(&the_index, (name), (namelen), (igncase))
+#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen))
#endif
enum object_type {
@@ -382,6 +383,7 @@ extern int add_to_index(struct index_state *, const char *path, struct stat *, i
extern int add_file_to_index(struct index_state *, const char *path, int flags);
extern struct cache_entry *make_cache_entry(unsigned int mode, const unsigned char *sha1, const char *path, int stage, int refresh);
extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
+extern int index_name_is_other(const struct index_state *, const char *, int);
/* do stat comparison even if CE_VALID is true */
#define CE_MATCH_IGNORE_VALID 01
View
@@ -1480,3 +1480,31 @@ int read_index_unmerged(struct index_state *istate)
istate->cache_nr = dst - istate->cache;
return !!last;
}
+
+/*
+ * Returns 1 if the path is an "other" path with respect to
+ * the index; that is, the path is not mentioned in the index at all,
+ * either as a file, a directory with some files in the index,
+ * or as an unmerged entry.
+ *
+ * We helpfully remove a trailing "/" from directories so that
+ * the output of read_directory can be used as-is.
+ */
+int index_name_is_other(const struct index_state *istate, const char *name,
+ int namelen)
+{
+ int pos;
+ if (namelen && name[namelen - 1] == '/')
+ namelen--;
+ pos = index_name_pos(istate, name, namelen);
+ if (0 <= pos)
+ return 0; /* exact match */
+ pos = -pos - 1;
+ if (pos < istate->cache_nr) {
+ struct cache_entry *ce = istate->cache[pos];
+ if (ce_namelen(ce) == namelen &&
+ !memcmp(ce->name, name, namelen))
+ return 0; /* Yup, this one exists unmerged */
+ }
+ return 1;
+}
View
@@ -285,6 +285,12 @@ test_expect_success 'status submodule summary is disabled by default' '
test_cmp expect output
'
+# we expect the same as the previous test
+test_expect_success 'status --untracked-files=all does not show submodule' '
+ git status --untracked-files=all >output &&
+ test_cmp expect output
+'
+
head=$(cd sm && git rev-parse --short=7 --verify HEAD)
cat >expect <<EOF
View
@@ -275,20 +275,9 @@ static void wt_status_print_untracked(struct wt_status *s)
read_directory(&dir, ".", "", 0, NULL);
for(i = 0; i < dir.nr; i++) {
- /* check for matching entry, which is unmerged; lifted from
- * builtin-ls-files:show_other_files */
struct dir_entry *ent = dir.entries[i];
- int pos = cache_name_pos(ent->name, ent->len);
- struct cache_entry *ce;
- if (0 <= pos)
- die("bug in wt_status_print_untracked");
- pos = -pos - 1;
- if (pos < active_nr) {
- ce = active_cache[pos];
- if (ce_namelen(ce) == ent->len &&
- !memcmp(ce->name, ent->name, ent->len))
- continue;
- }
+ if (!cache_name_is_other(ent->name, ent->len))
+ continue;
if (!shown_header) {
s->workdir_untracked = 1;
wt_status_print_header(s, "Untracked files",

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