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| author | Taylor Blau <me@ttaylorr.com> | 2017-10-02 09:10:34 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-10-05 10:41:57 +0900 |
| commit | bea4dbeafda3ddc4404f2e94dce0b66a4105399a (patch) | |
| tree | 6efc5ff1eb48fffef29c26cdf7d166af51292826 | |
| parent | 4010f1d1b782eb7585e0e0abcefa794bd5ff29a0 (diff) | |
| download | git-tb/ref-filter-empty-modifier.tar.gz | |
ref-filter.c: pass empty-string as NULL to atom parserstb/ref-filter-empty-modifier
Peff points out that different atom parsers handle the empty
"sub-argument" list differently. An example of this is the format
"%(refname:)".
Since callers often use `string_list_split` (which splits the empty
string with any delimiter as a 1-ary string_list containing the empty
string), this makes handling empty sub-argument strings non-ergonomic.
Let's fix this by declaring that atom parser implementations must
not care about distinguishing between the empty string "%(refname:)"
and no sub-arguments "%(refname)". Current code aborts, either with
"unrecognised arg" (e.g. "refname:") or "does not take args"
(e.g. "body:") as an error message.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Reviewed-by: Jeff King <peff@peff.net>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | ref-filter.c | 10 | ||||
| -rwxr-xr-x | t/t6300-for-each-ref.sh | 1 |
2 files changed, 10 insertions, 1 deletions
diff --git a/ref-filter.c b/ref-filter.c index bc591f4f3d..f3e53d4448 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -415,8 +415,16 @@ static int parse_ref_filter_atom(const struct ref_format *format, REALLOC_ARRAY(used_atom, used_atom_cnt); used_atom[at].name = xmemdupz(atom, ep - atom); used_atom[at].type = valid_atom[i].cmp_type; - if (arg) + if (arg) { arg = used_atom[at].name + (arg - atom) + 1; + if (!*arg) { + /* + * Treat empty sub-arguments list as NULL (i.e., + * "%(atom:)" is equivalent to "%(atom)"). + */ + arg = NULL; + } + } memset(&used_atom[at].u, 0, sizeof(used_atom[at].u)); if (valid_atom[i].parser) valid_atom[i].parser(format, &used_atom[at], arg); diff --git a/t/t6300-for-each-ref.sh b/t/t6300-for-each-ref.sh index 2274a4b733..edc1bd8eab 100755 --- a/t/t6300-for-each-ref.sh +++ b/t/t6300-for-each-ref.sh @@ -51,6 +51,7 @@ test_atom() { } test_atom head refname refs/heads/master +test_atom head refname: refs/heads/master test_atom head refname:short master test_atom head refname:lstrip=1 heads/master test_atom head refname:lstrip=2 master |