[PATCH v5 14/16] pathspec: create strip submodule slash helpers

[Brandon Williams]

Factor out the logic responsible for stripping the trailing slash on
pathspecs referencing submodules into its own function.

Signed-off-by: Brandon Williams <bmw...@google.com>
---
 pathspec.c | 68 ++++++++++++++++++++++++++++++++++++++------------------------
 1 file changed, 42 insertions(+), 26 deletions(-)

diff --git a/pathspec.c b/pathspec.c
index 00fcae4e1..f3a7a1d33 100644
--- a/pathspec.c
+++ b/pathspec.c
@@ -258,6 +258,44 @@ static const char *parse_element_magic(unsigned *magic, 
int *prefix_len,
                return parse_short_magic(magic, elem);
 }
 
+static void strip_submodule_slash_cheap(struct pathspec_item *item)
+{
+       if (item->len >= 1 && item->match[item->len - 1] == '/') {
+               int i = cache_name_pos(item->match, item->len - 1);
+
+               if (i >= 0 && S_ISGITLINK(active_cache[i]->ce_mode)) {
+                       item->len--;
+                       item->match[item->len] = '\0';
+               }
+       }
+}
+
+static void strip_submodule_slash_expensive(struct pathspec_item *item)
+{
+       int i;
+
+       for (i = 0; i < active_nr; i++) {
+               struct cache_entry *ce = active_cache[i];
+               int ce_len = ce_namelen(ce);
+
+               if (!S_ISGITLINK(ce->ce_mode))
+                       continue;
+
+               if (item->len <= ce_len || item->match[ce_len] != '/' ||
+                   memcmp(ce->name, item->match, ce_len))
+                       continue;
+
+               if (item->len == ce_len + 1) {
+                       /* strip trailing slash */
+                       item->len--;
+                       item->match[item->len] = '\0';
+               } else {
+                       die(_("Pathspec '%s' is in submodule '%.*s'"),
+                           item->original, ce_len, ce->name);
+               }
+       }
+}
+
 /*
  * Take an element of a pathspec and check for magic signatures.
  * Append the result to the prefix. Return the magic bitmap.
@@ -278,7 +316,7 @@ static unsigned prefix_pathspec(struct pathspec_item *item, 
unsigned flags,
        unsigned magic = 0, element_magic = 0;
        const char *copyfrom = elt;
        char *match;
-       int i, pathspec_prefix = -1;
+       int pathspec_prefix = -1;
 
        /* PATHSPEC_LITERAL_PATH ignores magic */
        if (flags & PATHSPEC_LITERAL_PATH) {
@@ -329,33 +367,11 @@ static unsigned prefix_pathspec(struct pathspec_item 
*item, unsigned flags,
        item->len = strlen(item->match);
        item->prefix = prefixlen;
 
-       if ((flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP) &&
-           (item->len >= 1 && item->match[item->len - 1] == '/') &&
-           (i = cache_name_pos(item->match, item->len - 1)) >= 0 &&
-           S_ISGITLINK(active_cache[i]->ce_mode)) {
-               item->len--;
-               match[item->len] = '\0';
-       }
+       if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_CHEAP)
+               strip_submodule_slash_cheap(item);
 
        if (flags & PATHSPEC_STRIP_SUBMODULE_SLASH_EXPENSIVE)
-               for (i = 0; i < active_nr; i++) {
-                       struct cache_entry *ce = active_cache[i];
-                       int ce_len = ce_namelen(ce);
-
-                       if (!S_ISGITLINK(ce->ce_mode))
-                               continue;
-
-                       if (item->len <= ce_len || match[ce_len] != '/' ||
-                           memcmp(ce->name, match, ce_len))
-                               continue;
-                       if (item->len == ce_len + 1) {
-                               /* strip trailing slash */
-                               item->len--;
-                               match[item->len] = '\0';
-                       } else
-                               die (_("Pathspec '%s' is in submodule '%.*s'"),
-                                    elt, ce_len, ce->name);
-               }
+               strip_submodule_slash_expensive(item);
 
        if (magic & PATHSPEC_LITERAL)
                item->nowildcard_len = item->len;
-- 
2.11.0.390.gc69c2f50cf-goog