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credential: allow wildcard patterns when matching config

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In some cases, a user will want to use a specific credential helper for
a wildcard pattern, such as https://*.corp.example.com.  We have code
that handles this already with the urlmatch code, so let's use that
instead of our custom code.

Since the urlmatch code is a superset of our current matching in terms
of capabilities, there shouldn't be any cases of things that matched
previously that don't match now.  However, in addition to wildcard
matching, we now use partial path matching, which can cause slightly
different behavior in the case that a helper applies to the prefix
(considering path components) of the remote URL.  While different, this
is probably the behavior people were wanting anyway.

Since we're using the urlmatch code, we need to encode the components
we've gotten into a URL to match, so add a function to percent-encode
data and format the URL with it.  We now also no longer need to the
custom code to match URLs, so let's remove it.

Additionally, the urlmatch code always looks for the best match, whereas
we want all matches for credential helpers to preserve existing
behavior.  Let's add an optional field, select_fn, that lets us control
which items we want (in this case, all of them) and default it to the
best-match code that already exists for other users.

Signed-off-by: brian m. carlson <bk2204@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
brian m. carlson
2020-02-20 02:24:13 +00:00
committed by Junio C Hamano
parent 82eb249853
commit 46fd7b3900
7 changed files with 103 additions and 21 deletions
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4
urlmatch.c
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@@ -557,6 +557,8 @@ int urlmatch_config_entry(const char *var, const char *value, void *cb)
const char *key, *dot;
struct strbuf synthkey = STRBUF_INIT;
int retval;
int (*select_fn)(const struct urlmatch_item *a, const struct urlmatch_item *b) =
collect->select_fn ? collect->select_fn : cmp_matches;
if (!skip_prefix(var, collect->section, &key) || *(key++) != '.') {
if (collect->cascade_fn)
@@ -587,7 +589,7 @@ int urlmatch_config_entry(const char *var, const char *value, void *cb)
if (!item->util) {
item->util = xcalloc(1, sizeof(matched));
} else {
if (cmp_matches(&matched, item->util) < 0)
if (select_fn(&matched, item->util) < 0)
/*
* Our match is worse than the old one,
* we cannot use it.