docs: fix filter-branch subdir example for exotic repo names

diff --git a/read-cache.c b/read-cache.c
index f1f789b7b87643245f1772d15b3f1cb321af324c..4f2e890b01b0c27ef2e49080e1fd34bf67e969c7 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -608,6 +608,29 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                ce->ce_mode = ce_mode_from_stat(ent, st_mode);
        }
 
+       /* When core.ignorecase=true, determine if a directory of the same name but differing
+        * case already exists within the Git repository.  If it does, ensure the directory
+        * case of the file being added to the repository matches (is folded into) the existing
+        * entry's directory case.
+        */
+       if (ignore_case) {
+               const char *startPtr = ce->name;
+               const char *ptr = startPtr;
+               while (*ptr) {
+                       while (*ptr && *ptr != '/')
+                               ++ptr;
+                       if (*ptr == '/') {
+                               struct cache_entry *foundce;
+                               ++ptr;
+                               foundce = index_name_exists(&the_index, ce->name, ptr - ce->name, ignore_case);
+                               if (foundce) {
+                                       memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
+                                       startPtr = ptr;
+                               }
+                       }
+               }
+       }
+
        alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
        if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) {
                /* Nothing changed, really */
@@ -1516,6 +1539,7 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
        int size = ondisk_ce_size(ce);
        struct ondisk_cache_entry *ondisk = xcalloc(1, size);
        char *name;
+       int result;
 
        ondisk->ctime.sec = htonl(ce->ce_ctime.sec);
        ondisk->mtime.sec = htonl(ce->ce_mtime.sec);
@@ -1539,7 +1563,9 @@ static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce)
                name = ondisk->name;
        memcpy(name, ce->name, ce_namelen(ce));
 
-       return ce_write(c, fd, ondisk, size);
+       result = ce_write(c, fd, ondisk, size);
+       free(ondisk);
+       return result;
 }
 
 int write_index(struct index_state *istate, int newfd)