[PATCH v6 20/44] builtin/apply: make add_conflicted_stages_file() return -1 on error

[Christian Couder <christian.couder@gmail.com>]

To libify `git apply` functionality we have to signal errors to the
caller instead of die()ing.

To do that in a compatible manner with the rest of the error handling
in "builtin/apply.c", add_conflicted_stages_file() should return -1
instead of calling die().

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 builtin/apply.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/builtin/apply.c b/builtin/apply.c
index 694c65b..0997384 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -4213,7 +4213,7 @@ static void create_one_file(struct apply_state *state,
 	die_errno(_("unable to write file '%s' mode %o"), path, mode);
 }
 
-static void add_conflicted_stages_file(struct apply_state *state,
+static int add_conflicted_stages_file(struct apply_state *state,
 				       struct patch *patch)
 {
 	int stage, namelen;
@@ -4221,7 +4221,7 @@ static void add_conflicted_stages_file(struct apply_state *state,
 	struct cache_entry *ce;
 
 	if (!state->update_index)
-		return;
+		return 0;
 	namelen = strlen(patch->new_name);
 	ce_size = cache_entry_size(namelen);
 	mode = patch->new_mode ? patch->new_mode : (S_IFREG | 0644);
@@ -4236,9 +4236,14 @@ static void add_conflicted_stages_file(struct apply_state *state,
 		ce->ce_flags = create_ce_flags(stage);
 		ce->ce_namelen = namelen;
 		hashcpy(ce->sha1, patch->threeway_stage[stage - 1].hash);
-		if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0)
-			die(_("unable to add cache entry for %s"), patch->new_name);
+		if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) {
+			free(ce);
+			return error(_("unable to add cache entry for %s"),
+				     patch->new_name);
+		}
 	}
+
+	return 0;
 }
 
 static void create_file(struct apply_state *state, struct patch *patch)
@@ -4252,9 +4257,10 @@ static void create_file(struct apply_state *state, struct patch *patch)
 		mode = S_IFREG | 0644;
 	create_one_file(state, path, mode, buf, size);
 
-	if (patch->conflicted_threeway)
-		add_conflicted_stages_file(state, patch);
-	else
+	if (patch->conflicted_threeway) {
+		if (add_conflicted_stages_file(state, patch))
+			exit(1);
+	} else
 		add_index_file(state, path, mode, buf, size);
 }
 
-- 
2.9.0.rc2.362.g3cd93d0