Merge branch 'jk/alt-odb-cleanup'

Codepaths involved in interacting alternate object store have
been cleaned up.

* jk/alt-odb-cleanup:
  alternates: use fspathcmp to detect duplicates
  sha1_file: always allow relative paths to alternates
  count-objects: report alternates via verbose mode
  fill_sha1_file: write into a strbuf
  alternates: store scratch buffer as strbuf
  fill_sha1_file: write "boring" characters
  alternates: use a separate scratch space
  alternates: encapsulate alt->base munging
  alternates: provide helper for allocating alternate
  alternates: provide helper for adding to alternates list
  link_alt_odb_entry: refactor string handling
  link_alt_odb_entry: handle normalize_path errors
  t5613: clarify "too deep" recursion tests
  t5613: do not chdir in main process
  t5613: whitespace/style cleanups
  t5613: use test_must_fail
  t5613: drop test_valid_repo function
  t5613: drop reachable_via function

1 files changed, 5 insertions, 12 deletions

diff --git a/sha1_name.c b/sha1_name.c
index 3b647fd7c..409283614 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -91,25 +91,18 @@ static void find_short_object_filename(struct disambiguate_state *ds)
 		 * alt->name/alt->base while iterating over the
 		 * object databases including our own.
 		 */
-		const char *objdir = get_object_directory();
-		size_t objdir_len = strlen(objdir);
-		fakeent = xmalloc(st_add3(sizeof(*fakeent), objdir_len, 43));
-		memcpy(fakeent->base, objdir, objdir_len);
-		fakeent->name = fakeent->base + objdir_len + 1;
-		fakeent->name[-1] = '/';
+		fakeent = alloc_alt_odb(get_object_directory());
 	}
 	fakeent->next = alt_odb_list;
 
 	xsnprintf(hex, sizeof(hex), "%.2s", ds->hex_pfx);
 	for (alt = fakeent; alt && !ds->ambiguous; alt = alt->next) {
+		struct strbuf *buf = alt_scratch_buf(alt);
 		struct dirent *de;
 		DIR *dir;
-		/*
-		 * every alt_odb struct has 42 extra bytes after the base
-		 * for exactly this purpose
-		 */
-		xsnprintf(alt->name, 42, "%.2s/", ds->hex_pfx);
-		dir = opendir(alt->base);
+
+		strbuf_addf(buf, "%.2s/", ds->hex_pfx);
+		dir = opendir(buf->buf);
 		if (!dir)
 			continue;