check-ignore (at least the test suite) seems to rely on the pattern
order. PATHSPEC_KEEP_ORDER is introduced to explictly express this.
The lack of PATHSPEC_MAXDEPTH_VALID is sufficient because it's the
only flag that reorders pathspecs, but it's less obvious that way.

Cc: Adam Spiers <g...@adamspiers.org>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 builtin/check-ignore.c | 35 ++++++++++++++++++++++-------------
 pathspec.c             |  6 +++++-
 pathspec.h             |  1 +
 t/t0008-ignores.sh     |  8 ++++----
 4 files changed, 32 insertions(+), 18 deletions(-)

diff --git a/builtin/check-ignore.c b/builtin/check-ignore.c
index 4a8fc70..d49c083 100644
--- a/builtin/check-ignore.c
+++ b/builtin/check-ignore.c
@@ -64,37 +64,45 @@ static void output_exclude(const char *path, struct exclude 
*exclude)
 }
 
 static int check_ignore(struct dir_struct *dir,
-                       const char *prefix, const char **pathspec)
+                       const char *prefix, int argc, const char **argv)
 {
-       const char *path, *full_path;
+       const char *full_path;
        char *seen;
        int num_ignored = 0, dtype = DT_UNKNOWN, i;
        struct exclude *exclude;
+       struct pathspec pathspec;
 
-       if (!pathspec || !*pathspec) {
+       if (!argc) {
                if (!quiet)
                        fprintf(stderr, "no pathspec given.\n");
                return 0;
        }
 
        /*
+        * check-ignore just needs paths. Magic beyond :/ is really
+        * irrelevant.
+        */
+       parse_pathspec(&pathspec,
+                      PATHSPEC_ALL_MAGIC & ~PATHSPEC_FROMTOP,
+                      PATHSPEC_SYMLINK_LEADING_PATH |
+                      PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE |
+                      PATHSPEC_KEEP_ORDER,
+                      prefix, argv);
+
+       /*
         * look for pathspecs matching entries in the index, since these
         * should not be ignored, in order to be consistent with
         * 'git status', 'git add' etc.
         */
-       seen = find_pathspecs_matching_against_index(pathspec);
-       for (i = 0; pathspec[i]; i++) {
-               path = pathspec[i];
-               full_path = prefix_path(prefix, prefix
-                                       ? strlen(prefix) : 0, path);
-               full_path = check_path_for_gitlink(full_path);
-               die_if_path_beyond_symlink(full_path, prefix);
+       seen = find_pathspecs_matching_against_index(pathspec.raw);
+       for (i = 0; i < pathspec.nr; i++) {
+               full_path = pathspec.raw[i];
                exclude = NULL;
                if (!seen[i]) {
                        exclude = last_exclude_matching(dir, full_path, &dtype);
                }
                if (!quiet && (exclude || show_non_matching))
-                       output_exclude(path, exclude);
+                       output_exclude(pathspec.items[i].original, exclude);
                if (exclude)
                        num_ignored++;
        }
@@ -120,7 +128,8 @@ static int check_ignore_stdin_paths(struct dir_struct *dir, 
const char *prefix)
                        strbuf_swap(&buf, &nbuf);
                }
                pathspec[0] = buf.buf;
-               num_ignored += check_ignore(dir, prefix, (const char 
**)pathspec);
+               num_ignored += check_ignore(dir, prefix,
+                                           1, (const char **)pathspec);
                maybe_flush_or_die(stdout, "check-ignore to stdout");
        }
        strbuf_release(&buf);
@@ -166,7 +175,7 @@ int cmd_check_ignore(int argc, const char **argv, const 
char *prefix)
        if (stdin_paths) {
                num_ignored = check_ignore_stdin_paths(&dir, prefix);
        } else {
-               num_ignored = check_ignore(&dir, prefix, argv);
+               num_ignored = check_ignore(&dir, prefix, argc, argv);
                maybe_flush_or_die(stdout, "ignore to stdout");
        }
 
diff --git a/pathspec.c b/pathspec.c
index ba6408a..5c9631a 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -370,9 +370,13 @@ void parse_pathspec(struct pathspec *pathspec,
                pathspec->magic |= item[i].magic;
        }
 
-       if (pathspec->magic & PATHSPEC_MAXDEPTH)
+
+       if (pathspec->magic & PATHSPEC_MAXDEPTH) {
+               if (flags & PATHSPEC_KEEP_ORDER)
+                       die("BUG: PATHSPEC_MAXDEPTH_VALID and 
PATHSPEC_KEEP_ORDER are incompatible");
                qsort(pathspec->items, pathspec->nr,
                      sizeof(struct pathspec_item), pathspec_item_cmp);
+       }
 }
 
 /*
diff --git a/pathspec.h b/pathspec.h
index 6baf205..02dded3 100644
--- a/pathspec.h
+++ b/pathspec.h
@@ -51,6 +51,7 @@ struct pathspec {
  */
 #define PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE (1<<5)
 #define PATHSPEC_PREFIX_ORIGIN (1<<6)
+#define PATHSPEC_KEEP_ORDER (1<<7)
 
 extern int init_pathspec(struct pathspec *, const char **);
 extern void parse_pathspec(struct pathspec *pathspec,
diff --git a/t/t0008-ignores.sh b/t/t0008-ignores.sh
index a56db80..2ced8e9 100755
--- a/t/t0008-ignores.sh
+++ b/t/t0008-ignores.sh
@@ -432,7 +432,7 @@ test_expect_success_multi SYMLINKS 'symlink' '::    
a/symlink' '
 
 test_expect_success_multi SYMLINKS 'beyond a symlink' '' '
        test_check_ignore "a/symlink/foo" 128 &&
-       test_stderr "fatal: '\''a/symlink/foo'\'' is beyond a symbolic link"
+       test_stderr "fatal: pathspec '\''a/symlink/foo'\'' is beyond a symbolic 
link"
 '
 
 test_expect_success_multi SYMLINKS 'beyond a symlink from subdirectory' '' '
@@ -440,7 +440,7 @@ test_expect_success_multi SYMLINKS 'beyond a symlink from 
subdirectory' '' '
                cd a &&
                test_check_ignore "symlink/foo" 128
        ) &&
-       test_stderr "fatal: '\''symlink/foo'\'' is beyond a symbolic link"
+       test_stderr "fatal: pathspec '\''symlink/foo'\'' is beyond a symbolic 
link"
 '
 
 ############################################################################
@@ -449,7 +449,7 @@ test_expect_success_multi SYMLINKS 'beyond a symlink from 
subdirectory' '' '
 
 test_expect_success_multi 'submodule' '' '
        test_check_ignore "a/submodule/one" 128 &&
-       test_stderr "fatal: Path '\''a/submodule/one'\'' is in submodule 
'\''a/submodule'\''"
+       test_stderr "fatal: Pathspec '\''a/submodule/one'\'' is in submodule 
'\''a/submodule'\''"
 '
 
 test_expect_success_multi 'submodule from subdirectory' '' '
@@ -457,7 +457,7 @@ test_expect_success_multi 'submodule from subdirectory' '' '
                cd a &&
                test_check_ignore "submodule/one" 128
        ) &&
-       test_stderr "fatal: Path '\''a/submodule/one'\'' is in submodule 
'\''a/submodule'\''"
+       test_stderr "fatal: Pathspec '\''submodule/one'\'' is in submodule 
'\''a/submodule'\''"
 '
 
 ############################################################################
-- 
1.8.2.83.gc99314b

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