To libify `git apply` functionality we have to signal errors to the
caller instead of die()ing or exit()ing.
To do that in a compatible manner with the rest of the error handling
in builtin/apply.c, find_header() should return -1 instead of calling
die() or exit().
As parse_chunk() is called only by apply_patch() which already
returns -1 when an error happened, let's make apply_patch() return -1
when parse_chunk() returns -1.
If find_header() returns -2 because no patch header has been found, it
is ok for parse_chunk() to also return -2. If find_header() returns -1
because an error happened, it is ok for parse_chunk() to do the same.
Helped-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
Signed-off-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
---
builtin/apply.c | 21 +++++++++++++--------
1 file changed, 13 insertions(+), 8 deletions(-)
diff --git a/builtin/apply.c b/builtin/apply.c
index 4212705..2380472 100644
--- a/builtin/apply.c
+++ b/builtin/apply.c
@@ -2101,22 +2101,22 @@ static int use_patch(struct apply_state *state, struct patch *p)
return !state->has_include;
}
-
/*
* Read the patch text in "buffer" that extends for "size" bytes; stop
* reading after seeing a single patch (i.e. changes to a single file).
* Create fragments (i.e. patch hunks) and hang them to the given patch.
- * Return the number of bytes consumed, so that the caller can call us
- * again for the next patch.
+ *
+ * Returns:
+ * -1 on error,
+ * -2 if no header was found,
+ * the number of bytes consumed otherwise,
+ * so that the caller can call us again for the next patch.
*/
static int parse_chunk(struct apply_state *state, char *buffer, unsigned long size, struct patch *patch)
{
int hdrsize, patchsize;
int offset = find_header(state, buffer, size, &hdrsize, patch);
- if (offset == -1)
- exit(1);
-
if (offset < 0)
return offset;
@@ -2176,8 +2176,9 @@ static int parse_chunk(struct apply_state *state, char *buffer, unsigned long si
* empty to us here.
*/
if ((state->apply || state->check) &&
- (!patch->is_binary && !metadata_changes(patch)))
- die(_("patch with only garbage at line %d"), state->linenr);
+ (!patch->is_binary && !metadata_changes(patch))) {
+ return error(_("patch with only garbage at line %d"), state->linenr);
+ }
}
return offset + hdrsize + patchsize;
@@ -4557,6 +4558,10 @@ static int apply_patch(struct apply_state *state,
nr = parse_chunk(state, buf.buf + offset, buf.len - offset, patch);
if (nr < 0) {
free_patch(patch);
+ if (nr == -1) {
+ res = -1;
+ goto end;
+ }
break;
}
if (state->apply_in_reverse)
--
2.8.2.490.g3dabe57
--
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