[PATCH 3/3] credential: allow wildcard patterns when matching config

["brian m. carlson" <sandals@crustytoothpaste.net>]

From: brian m. carlson <bk2204@github.com>

In some cases, a user will want to use a specific credential helper for
a wildcard pattern, such as https://*.corp.example.com. Use the urlmatch
code to match a pattern for a URL to allow this behavior.

Since we are handling URLs using urlmatch, remove the custom code to
match URLs, since it is no longer needed.

Signed-off-by: brian m. carlson <bk2204@github.com>
---
 Documentation/gitcredentials.txt |  4 +++-
 credential.c                     | 41 +++++++++++++++++---------------
 t/t0300-credentials.sh           | 20 ++++++++++++++++
 3 files changed, 45 insertions(+), 20 deletions(-)

diff --git a/Documentation/gitcredentials.txt b/Documentation/gitcredentials.txt
index ea759fdee5..12cb032352 100644
--- a/Documentation/gitcredentials.txt
+++ b/Documentation/gitcredentials.txt
@@ -131,7 +131,9 @@ context would not match:
 because the hostnames differ. Nor would it match `foo.example.com`; Git
 compares hostnames exactly, without considering whether two hosts are part of
 the same domain. Likewise, a config entry for `http://example.com` would not
-match: Git compares the protocols exactly.
+match: Git compares the protocols exactly.  However, you may use wildcards in
+the domain name and other pattern matching techniques as with the `http.<url>.*`
+options.
 
 If the "pattern" URL does include a path component, then this too must match
 exactly: the context `https://example.com/bar/baz.git` will match a config
diff --git a/credential.c b/credential.c
index 62be651b03..08904e247f 100644
--- a/credential.c
+++ b/credential.c
@@ -6,6 +6,7 @@
 #include "url.h"
 #include "prompt.h"
 #include "sigchain.h"
+#include "urlmatch.h"
 
 void credential_init(struct credential *c)
 {
@@ -40,7 +41,7 @@ static int credential_config_callback(const char *var, const char *value,
 				      void *data)
 {
 	struct credential *c = data;
-	const char *key, *dot;
+	const char *key;
 
 	if (!skip_prefix(var, "credential.", &key))
 		return 0;
@@ -48,23 +49,6 @@ static int credential_config_callback(const char *var, const char *value,
 	if (!value)
 		return config_error_nonbool(var);
 
-	dot = strrchr(key, '.');
-	if (dot) {
-		struct credential want = CREDENTIAL_INIT;
-		char *url = xmemdupz(key, dot - key);
-		int matched;
-
-		credential_from_url(&want, url);
-		matched = credential_match(&want, c);
-
-		credential_clear(&want);
-		free(url);
-
-		if (!matched)
-			return 0;
-		key = dot + 1;
-	}
-
 	if (!strcmp(key, "helper")) {
 		if (*value)
 			string_list_append(&c->helpers, value);
@@ -87,11 +71,30 @@ static int proto_is_http(const char *s)
 	return !strcmp(s, "https") || !strcmp(s, "http");
 }
 
+static void credential_describe(struct credential *c, struct strbuf *out);
+
 static void credential_apply_config(struct credential *c)
 {
+	char *normalized_url;
+	struct urlmatch_config config = { STRING_LIST_INIT_DUP };
+	struct strbuf url = STRBUF_INIT;
+
 	if (c->configured)
 		return;
-	git_config(credential_config_callback, c);
+
+	config.section = "credential";
+	config.key = NULL;
+	config.collect_fn = credential_config_callback;
+	config.cascade_fn = git_default_config;
+	config.cb = c;
+
+	credential_describe(c, &url);
+	normalized_url = url_normalize(url.buf, &config.url);
+
+	git_config(urlmatch_config_entry, &config);
+	free(normalized_url);
+	strbuf_release(&url);
+
 	c->configured = 1;
 
 	if (!c->use_http_path && proto_is_http(c->protocol)) {
diff --git a/t/t0300-credentials.sh b/t/t0300-credentials.sh
index 82eaaea0f4..516b3268f9 100755
--- a/t/t0300-credentials.sh
+++ b/t/t0300-credentials.sh
@@ -289,6 +289,26 @@ test_expect_success 'http paths can be part of context' '
 	EOF
 '
 
+test_expect_success 'context uses urlmatch' '
+	test_config "credential.https://*.org.useHttpPath" true &&
+	check fill "verbatim foo bar" <<-\EOF
+	protocol=https
+	host=example.org
+	path=foo.git
+	--
+	protocol=https
+	host=example.org
+	path=foo.git
+	username=foo
+	password=bar
+	--
+	verbatim: get
+	verbatim: protocol=https
+	verbatim: host=example.org
+	verbatim: path=foo.git
+	EOF
+'
+
 test_expect_success 'helpers can abort the process' '
 	test_must_fail git \
 		-c credential.helper="!f() { echo quit=1; }; f" \