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builtin/apply: make find_header() return -128 instead of die()ing

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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, let's make find_header() return -128 instead of
calling die().

We could make it return -1, unfortunately find_header() already
returns -1 when no header is found.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder 2016-08-08 23:03:02 +02:00 committed by Junio C Hamano
parent 3bee345d7b
commit 5950851e44
2 changed files with 29 additions and 13 deletions
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40
builtin/apply.c
View file

@ -1419,6 +1419,14 @@ static int parse_fragment_header(const char *line, int len, struct fragment *fra
return offset;
}
/*
* Find file diff header
*
* Returns:
* -1 if no header was found
* -128 in case of error
* the size of the header in bytes (called "offset") otherwise
*/
static int find_header(struct apply_state *state,
const char *line,
unsigned long size,
@ -1452,8 +1460,9 @@ static int find_header(struct apply_state *state,
struct fragment dummy;
if (parse_fragment_header(line, len, &dummy) < 0)
continue;
die(_("patch fragment without header at line %d: %.*s"),
state->linenr, (int)len-1, line);
error(_("patch fragment without header at line %d: %.*s"),
state->linenr, (int)len-1, line);
return -128;
}
if (size < len + 6)
@ -1468,19 +1477,23 @@ static int find_header(struct apply_state *state,
if (git_hdr_len <= len)
continue;
if (!patch->old_name && !patch->new_name) {
if (!patch->def_name)
die(Q_("git diff header lacks filename information when removing "
"%d leading pathname component (line %d)",
"git diff header lacks filename information when removing "
"%d leading pathname components (line %d)",
state->p_value),
state->p_value, state->linenr);
if (!patch->def_name) {
error(Q_("git diff header lacks filename information when removing "
"%d leading pathname component (line %d)",
"git diff header lacks filename information when removing "
"%d leading pathname components (line %d)",
state->p_value),
state->p_value, state->linenr);
return -128;
}
patch->old_name = xstrdup(patch->def_name);
patch->new_name = xstrdup(patch->def_name);
}
if (!patch->is_delete && !patch->new_name)
die("git diff header lacks filename information "
"(line %d)", state->linenr);
if (!patch->is_delete && !patch->new_name) {
error("git diff header lacks filename information "
"(line %d)", state->linenr);
return -128;
}
patch->is_toplevel_relative = 1;
*hdrsize = git_hdr_len;
return offset;
@ -1996,6 +2009,9 @@ static int parse_chunk(struct apply_state *state, char *buffer, unsigned long si
int hdrsize, patchsize;
int offset = find_header(state, buffer, size, &hdrsize, patch);
if (offset == -128)
exit(128);
if (offset < 0)
return offset;

2
t/t4254-am-corrupt.sh
View file

@ -29,7 +29,7 @@ test_expect_success 'try to apply corrupted patch' '
'
test_expect_success 'compare diagnostic; ensure file is still here' '
echo "fatal: git diff header lacks filename information (line 4)" >expected &&
echo "error: git diff header lacks filename information (line 4)" >expected &&
test_path_is_file f &&
test_cmp expected actual
'