It's possible to use a variety of index formats with show-index, and we
need a way to indicate the hash algorithm which is in use for a
particular index we'd like to show. Default to using the value for the
repository we're in by calling setup_git_directory_gently, and allow
overriding it by using a --hash argument.
Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
builtin/show-index.c | 29 ++++++++++++++++++++++++-----
git.c | 2 +-
2 files changed, 25 insertions(+), 6 deletions(-)
diff --git a/builtin/show-index.c b/builtin/show-index.c
index 0826f6a5a2..ebfa2e9abd 100644
--- a/builtin/show-index.c
+++ b/builtin/show-index.c
@@ -1,9 +1,12 @@
#include "builtin.h"
#include "cache.h"
#include "pack.h"
+#include "parse-options.h"
-static const char show_index_usage[] =
-"git show-index";
+static const char *const show_index_usage[] = {
+ "git show-index [--hash=HASH]",
+ NULL
+};
int cmd_show_index(int argc, const char **argv, const char *prefix)
{
@@ -11,10 +14,26 @@ int cmd_show_index(int argc, const char **argv, const char *prefix)
unsigned nr;
unsigned int version;
static unsigned int top_index[256];
- const unsigned hashsz = the_hash_algo->rawsz;
+ unsigned hashsz;
+ const char *hash_name = NULL;
+ int hash_algo;
+ const struct option show_index_options[] = {
+ OPT_STRING(0, "hash", &hash_name, N_("hash"),
+ N_("specify the hash algorithm to use")),
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, prefix, show_index_options, show_index_usage, 0);
+
+ if (hash_name) {
+ hash_algo = hash_algo_by_name(hash_name);
+ if (hash_algo == GIT_HASH_UNKNOWN)
+ die(_("Unknown hash algorithm"));
+ repo_set_hash_algo(the_repository, hash_algo);
+ }
+
+ hashsz = the_hash_algo->rawsz;
- if (argc != 1)
- usage(show_index_usage);
if (fread(top_index, 2 * 4, 1, stdin) != 1)
die("unable to read header");
if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
diff --git a/git.c b/git.c
index 2e4efb4ff0..e53e8159a2 100644
--- a/git.c
+++ b/git.c
@@ -573,7 +573,7 @@ static struct cmd_struct commands[] = {
{ "shortlog", cmd_shortlog, RUN_SETUP_GENTLY | USE_PAGER },
{ "show", cmd_show, RUN_SETUP },
{ "show-branch", cmd_show_branch, RUN_SETUP },
- { "show-index", cmd_show_index },
+ { "show-index", cmd_show_index, RUN_SETUP_GENTLY },
{ "show-ref", cmd_show_ref, RUN_SETUP },
{ "sparse-checkout", cmd_sparse_checkout, RUN_SETUP | NEED_WORK_TREE },
{ "stage", cmd_add, RUN_SETUP | NEED_WORK_TREE },
