v3 refines v2 a bit more:
- fix configure typo (and stray words in commit message)
- use repo_set_hash_algo() instead of reassigning the_hash_algo
- compare hash algos by format_id
- catch NULL hash algo, report nicely and suggest GIT_HASH_FIXUP
The last point makes me much happier about keeping this workaround
around until we are confident we can live without it. Interdiff
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 1144458140..2c75f28b41 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -331,21 +331,24 @@ static const char *open_pack_file(const char *pack_name)
static void prepare_hash_algo(uint32_t pack_version)
{
+ int pack_algo_id;
const struct git_hash_algo *pack_algo;
switch (pack_version) {
case 2:
case 3:
- pack_algo = &hash_algos[GIT_HASH_SHA1];
+ pack_algo_id = GIT_HASH_SHA1;
break;
default:
- die("BUG: how to determine hash algo for new version?");
+ die("BUG: how to determine hash algo for version %d?",
+ pack_version);
}
- if (!the_hash_algo) /* running without repo */
- the_hash_algo = pack_algo;
+ if (!repo_has_valid_hash_algo(the_repository)) /* running without repo
*/
+ repo_set_hash_algo(the_repository, pack_algo_id);
- if (the_hash_algo != pack_algo)
+ pack_algo = &hash_algos[pack_algo_id];
+ if (the_hash_algo->format_id != pack_algo->format_id)
die(_("incompatible hash algorithm, "
"configured for %s but the pack file needs %s"),
the_hash_algo->name, pack_algo->name);
diff --git a/cache.h b/cache.h
index 6b97138264..55b31e9756 100644
--- a/cache.h
+++ b/cache.h
@@ -53,7 +53,7 @@ struct object_id {
unsigned char hash[GIT_MAX_RAWSZ];
};
-#define the_hash_algo the_repository->hash_algo
+#define the_hash_algo repo_get_hash_algo(the_repository)
#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
#define DTYPE(de) ((de)->d_type)
diff --git a/diff.c b/diff.c
index f5755425b6..5f28d84b87 100644
--- a/diff.c
+++ b/diff.c
@@ -3997,15 +3997,15 @@ static void run_diff(struct diff_filepair *p, struct
diff_options *o)
/*
* NEEDSWORK: When running in no-index mode (and no repo is
- * found, thus no hash algo conifugred), fall back to SHA-1
+ * found, thus no hash algo configured), fall back to SHA-1
* hashing (which is used by diff_fill_oid_info below) to
* avoid regression in diff output.
*
* In future, perhaps we can allow the user to specify their
* hash algorithm from command line in this mode.
*/
- if (o->flags.no_index && !the_hash_algo)
- the_hash_algo = &hash_algos[GIT_HASH_SHA1];
+ if (o->flags.no_index && !repo_has_valid_hash_algo(the_repository))
+ repo_set_hash_algo(the_repository, GIT_HASH_SHA1);
diff_fill_oid_info(one);
diff_fill_oid_info(two);
diff --git a/repository.h b/repository.h
index 0329e40c7f..40bd49611f 100644
--- a/repository.h
+++ b/repository.h
@@ -107,4 +107,20 @@ extern void repo_clear(struct repository *repo);
*/
extern int repo_read_index(struct repository *repo);
+static inline const struct git_hash_algo *repo_get_hash_algo(
+ const struct repository *repo)
+{
+ if (!repo->hash_algo)
+ die("BUG: hash_algo is not initialized!\n%s",
+ _("You can work around this by setting environment"
+ " variable GIT_HASH_FIXUP=1.\n"
+ "Please report this to git@vger.kernel.org"));
+ return repo->hash_algo;
+}
+
+static inline int repo_has_valid_hash_algo(const struct repository *repo)
+{
+ return repo->hash_algo != NULL;
+}
+
#endif /* REPOSITORY_H */
Nguyễn Thái Ngọc Duy (6):
setup.c: initialize the_repository correctly in all cases
sha1_file.c: keep a good name for "unknown" hash_algos[UNKNOWN]
cache.h: make the_hash_algo read-only
index-pack: check (and optionally set) hash algo based on input file
diff.c: initialize hash algo when running in --no-index mode
Revert "repository: pre-initialize hash algo pointer"
builtin/index-pack.c | 29 ++++++++++++++++++++++++++++-
builtin/init-db.c | 3 ++-
cache.h | 5 +++--
common-main.c | 10 ++++++++++
diff.c | 12 ++++++++++++
path.c | 2 +-
repository.c | 2 +-
repository.h | 16 ++++++++++++++++
setup.c | 5 ++++-
sha1_file.c | 2 +-
t/helper/test-dump-split-index.c | 2 ++
11 files changed, 80 insertions(+), 8 deletions(-)
--
2.16.1.435.g8f24da2e1a
