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, 5698454e 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>

diff --git a/builtin-ls-files.c b/builtin-ls-files.c
index 068f424696864f3db1c1b78ef25a92a197ff5474..b48327db950e5d8a54045f4956fa92b7879227bc 100644 (file)
--- a/builtin-ls-files.c
+++ b/builtin-ls-files.c
@@ -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);
        }
 }

diff --git a/cache.h b/cache.h
index 884fae826cb8c296520aecbc8c23d9848dacb606..76730cee61441ce694c48addf02e935237addc71 100644 (file)
--- a/cache.h
+++ b/cache.h
@@ -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

diff --git a/read-cache.c b/read-cache.c
index 8f96fd17226e26c4b8a1497aace5b9fffb664bbe..4e067e489743aca27dc13e3d04d4e41f4ffec95b 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -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;
+}

diff --git a/t/t7502-status.sh b/t/t7502-status.sh
index c8e4c2e7b452c5e8db3958a85195c8cc5f6918f5..187a13e64fe2b2fea85b3a80852cd2dacca5acd3 100755 (executable)
--- a/t/t7502-status.sh
+++ b/t/t7502-status.sh
@@ -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

diff --git a/wt-status.c b/wt-status.c
index 889e50f89fc24984f700d14f7033600fa9fdf642..64cedfcbe14ab0448ab6225b50244a45492a546a 100644 (file)
--- a/wt-status.c
+++ b/wt-status.c
@@ -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",