[PATCH v6 19/44] builtin/apply: make remove_file() return -1 on error

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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", remove_file() should return -1 instead of
calling die().

Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
 builtin/apply.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/builtin/apply.c b/builtin/apply.c
index e74b068..694c65b 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -4074,17 +4074,18 @@ static void patch_stats(struct apply_state *state, struct patch *patch)
 	}
 }
 
-static void remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
+static int remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
 {
 	if (state->update_index) {
 		if (remove_file_from_cache(patch->old_name) < 0)
-			die(_("unable to remove %s from index"), patch->old_name);
+			return error(_("unable to remove %s from index"), patch->old_name);
 	}
 	if (!state->cached) {
 		if (!remove_or_warn(patch->old_mode, patch->old_name) && rmdir_empty) {
 			remove_path(patch->old_name);
 		}
 	}
+	return 0;
 }
 
 static void add_index_file(struct apply_state *state,
@@ -4263,8 +4264,10 @@ static void write_out_one_result(struct apply_state *state,
 				 int phase)
 {
 	if (patch->is_delete > 0) {
-		if (phase == 0)
-			remove_file(state, patch, 1);
+		if (phase == 0) {
+			if (remove_file(state, patch, 1))
+				exit(1);
+		}
 		return;
 	}
 	if (patch->is_new > 0 || patch->is_copy) {
@@ -4276,8 +4279,10 @@ static void write_out_one_result(struct apply_state *state,
 	 * Rename or modification boils down to the same
 	 * thing: remove the old, write the new
 	 */
-	if (phase == 0)
-		remove_file(state, patch, patch->is_rename);
+	if (phase == 0) {
+		if (remove_file(state, patch, patch->is_rename))
+			exit(1);
+	}
 	if (phase == 1)
 		create_file(state, patch);
 }
-- 
2.9.0.rc2.362.g3cd93d0

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