To libify `git apply` functionality we have to signal errors
to the caller instead of die()ing.
As a first step in this direction, let's make apply_patch() return
-1 in case of errors instead of dying. For now its only caller
apply_all_patches() will exit(1) when apply_patch() return -1.
In a later patch, apply_all_patches() will return -1 too instead of
exiting.
Helped-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
builtin/apply.c | 54 +++++++++++++++++++++++++++++++++++++++---------------
1 file changed, 39 insertions(+), 15 deletions(-)
diff --git a/builtin/apply.c b/builtin/apply.c
index ec55768..d95630c 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -4512,6 +4512,14 @@ static int write_out_results(struct apply_state *state, struct patch *list)
#define INACCURATE_EOF (1<<0)
#define RECOUNT (1<<1)
+/*
+ * Try to apply a patch.
+ *
+ * Returns:
+ * -1 if an error happened
+ * 0 if the patch applied
+ * 1 if the patch did not apply
+ */
static int apply_patch(struct apply_state *state,
int fd,
const char *filename,
@@ -4521,6 +4529,7 @@ static int apply_patch(struct apply_state *state,
struct strbuf buf = STRBUF_INIT; /* owns the patch text */
struct patch *list = NULL, **listp = &list;
int skipped_patch = 0;
+ int res = 0;
state->patch_input_file = filename;
read_patch_file(&buf, fd);
@@ -4553,8 +4562,10 @@ static int apply_patch(struct apply_state *state,
offset += nr;
}
- if (!list && !skipped_patch)
- die(_("unrecognized input"));
+ if (!list && !skipped_patch) {
+ res = error(_("unrecognized input"));
+ goto end;
+ }
if (state->whitespace_error && (state->ws_error_action == die_on_ws_error))
state->apply = 0;
@@ -4563,21 +4574,22 @@ static int apply_patch(struct apply_state *state,
if (state->update_index && state->newfd < 0)
state->newfd = hold_locked_index(state->lock_file, 1);
- if (state->check_index) {
- if (read_cache() < 0)
- die(_("unable to read index file"));
+ if (state->check_index && read_cache() < 0) {
+ res = error(_("unable to read index file"));
+ goto end;
}
if ((state->check || state->apply) &&
check_patch_list(state, list) < 0 &&
- !state->apply_with_reject)
- exit(1);
+ !state->apply_with_reject) {
+ res = -1;
+ goto end;
+ }
if (state->apply && write_out_results(state, list)) {
- if (state->apply_with_reject)
- exit(1);
/* with --3way, we still need to write the index out */
- return 1;
+ res = state->apply_with_reject ? -1 : 1;
+ goto end;
}
if (state->fake_ancestor)
@@ -4592,10 +4604,11 @@ static int apply_patch(struct apply_state *state,
if (state->summary)
summary_patch_list(list);
+end:
free_patch_list(list);
strbuf_release(&buf);
string_list_clear(&state->fn_table, 0);
- return 0;
+ return res;
}
static void git_apply_config(void)
@@ -4722,6 +4735,7 @@ static int apply_all_patches(struct apply_state *state,
int options)
{
int i;
+ int res;
int errs = 0;
int read_stdin = 1;
@@ -4730,7 +4744,10 @@ static int apply_all_patches(struct apply_state *state,
int fd;
if (!strcmp(arg, "-")) {
- errs |= apply_patch(state, 0, "<stdin>", options);
+ res = apply_patch(state, 0, "<stdin>", options);
+ if (res < 0)
+ exit(1);
+ errs |= res;
read_stdin = 0;
continue;
} else if (0 < state->prefix_length)
@@ -4743,12 +4760,19 @@ static int apply_all_patches(struct apply_state *state,
die_errno(_("can't open patch '%s'"), arg);
read_stdin = 0;
set_default_whitespace_mode(state);
- errs |= apply_patch(state, fd, arg, options);
+ res = apply_patch(state, fd, arg, options);
+ if (res < 0)
+ exit(1);
+ errs |= res;
close(fd);
}
set_default_whitespace_mode(state);
- if (read_stdin)
- errs |= apply_patch(state, 0, "<stdin>", options);
+ if (read_stdin) {
+ res = apply_patch(state, 0, "<stdin>", options);
+ if (res < 0)
+ exit(1);
+ errs |= res;
+ }
if (state->whitespace_error) {
if (state->squelch_whitespace_errors &&
--
2.8.2.490.g3dabe57
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