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 <chrisc...@tuxfamily.org>
---
 builtin/apply.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/builtin/apply.c b/builtin/apply.c
index bb1dffa..cb3ef1c 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -4085,17 +4085,18 @@ 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,
@@ -4274,8 +4275,10 @@ 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(128);
+               }
                return;
        }
        if (patch->is_new > 0 || patch->is_copy) {
@@ -4287,8 +4290,10 @@ 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(128);
+       }
        if (phase == 1)
                create_file(state, patch);
 }
-- 
2.9.0.172.gfb57a78

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