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commit: also match the first header field when searching

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We were searching only past the first header field, which meant we were
unable to find e.g. `tree` which is the first field.

While here, make sure to set an error message in case we cannot find the
field.
This commit is contained in:
Carlos Martín Nieto 2016-02-09 07:17:26 +01:00
parent 700f0aff24
commit f55eca167c
2 changed files with 26 additions and 17 deletions
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39
src/commit.c
View File

@ -564,41 +564,45 @@ int git_commit_nth_gen_ancestor(
int git_commit_header_field(git_buf *out, const git_commit *commit, const char *field)
{
const char *buf = commit->raw_header;
const char *h, *eol;
const char *eol, *buf = commit->raw_header;
git_buf_sanitize(out);
while ((h = strchr(buf, '\n')) && h[1] != '\0' && h[1] != '\n') {
h++;
if (git__prefixcmp(h, field)) {
buf = h;
while ((eol = strchr(buf, '\n')) && eol[1] != '\0') {
/* We can skip continuations here */
if (buf[0] == ' ') {
buf = eol + 1;
continue;
}
h += strlen(field);
eol = strchr(h, '\n');
if (h[0] != ' ') {
buf = h;
/* Skip until we find the field we're after */
if (git__prefixcmp(buf, field)) {
buf = eol + 1;
continue;
}
if (!eol)
goto malformed;
h++; /* skip the SP */
buf += strlen(field);
/* Check that we're not matching a prefix but the field itself */
if (buf[0] != ' ') {
buf = eol + 1;
continue;
}
git_buf_put(out, h, eol - h);
buf++; /* skip the SP */
git_buf_put(out, buf, eol - buf);
if (git_buf_oom(out))
goto oom;
/* If the next line starts with SP, it's multi-line, we must continue */
while (eol[1] == ' ') {
git_buf_putc(out, '\n');
h = eol + 2;
eol = strchr(h, '\n');
buf = eol + 2;
eol = strchr(buf, '\n');
if (!eol)
goto malformed;
git_buf_put(out, h, eol - h);
git_buf_put(out, buf, eol - buf);
}
if (git_buf_oom(out))
@ -607,6 +611,7 @@ int git_commit_header_field(git_buf *out, const git_commit *commit, const char *
return 0;
}
giterr_set(GITERR_OBJECT, "no such field '%s'", field);
return GIT_ENOTFOUND;
malformed:

4
tests/commit/parse.c
View File

@ -443,6 +443,10 @@ cpxtDQQMGYFpXK/71stq\n\
cl_git_pass(parse_commit(&commit, passing_commit_cases[4]));
cl_git_pass(git_commit_header_field(&buf, commit, "tree"));
cl_assert_equal_s("6b79e22d69bf46e289df0345a14ca059dfc9bdf6", buf.ptr);
git_buf_clear(&buf);
cl_git_pass(git_commit_header_field(&buf, commit, "parent"));
cl_assert_equal_s("34734e478d6cf50c27c9d69026d93974d052c454", buf.ptr);
git_buf_clear(&buf);