[PATCH v4 16/16] refs.c: add an err argument to pack_refs

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From: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>

Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Signed-off-by: Stefan Beller <sbeller@xxxxxxxxxx>
---
 builtin/pack-refs.c | 8 +++++++-
 refs.c              | 7 +++----
 refs.h              | 3 ++-
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/builtin/pack-refs.c b/builtin/pack-refs.c
index b20b1ec..299768e 100644
--- a/builtin/pack-refs.c
+++ b/builtin/pack-refs.c
@@ -10,6 +10,7 @@ static char const * const pack_refs_usage[] = {
 int cmd_pack_refs(int argc, const char **argv, const char *prefix)
 {
 	unsigned int flags = PACK_REFS_PRUNE;
+	struct strbuf err = STRBUF_INIT;
 	struct option opts[] = {
 		OPT_BIT(0, "all",   &flags, N_("pack everything"), PACK_REFS_ALL),
 		OPT_BIT(0, "prune", &flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),
@@ -17,5 +18,10 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
 	};
 	if (parse_options(argc, argv, prefix, opts, pack_refs_usage, 0))
 		usage_with_options(pack_refs_usage, opts);
-	return pack_refs(flags);
+	if (pack_refs(flags, &err)) {
+		error("%s", err.buf);
+		strbuf_release(&err);
+		return -1;
+	}
+	return 0;
 }
diff --git a/refs.c b/refs.c
index 725945e..ddb5fc6 100644
--- a/refs.c
+++ b/refs.c
@@ -2593,16 +2593,15 @@ static void prune_refs(struct ref_to_prune *r)
 	}
 }
 
-int pack_refs(unsigned int flags)
+int pack_refs(unsigned int flags, struct strbuf *err)
 {
 	struct pack_refs_cb_data cbdata;
-	struct strbuf err = STRBUF_INIT;
 
 	memset(&cbdata, 0, sizeof(cbdata));
 	cbdata.flags = flags;
 
-	if (lock_packed_refs(&err))
-		die("%s", err.buf);
+	if (lock_packed_refs(err))
+		return -1;
 
 	cbdata.packed_refs = get_packed_refs(&ref_cache);
 
diff --git a/refs.h b/refs.h
index b5ba685..489aa9d 100644
--- a/refs.h
+++ b/refs.h
@@ -130,8 +130,9 @@ extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct st
 /*
  * Write a packed-refs file for the current repository.
  * flags: Combination of the above PACK_REFS_* flags.
+ * Returns 0 on success and fills in err on failure.
  */
-int pack_refs(unsigned int flags);
+int pack_refs(unsigned int flags, struct strbuf *err);
 
 extern int ref_exists(const char *);
 
-- 
2.2.0.rc2.5.gf7b9fb2

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