From a78fbb4fb6c69d96cb91dee9d4733d2326c6d019 Mon Sep 17 00:00:00 2001
From: Jeff King <peff@peff.net>
Date: Sat, 10 Dec 2011 05:31:34 -0500
Subject: [PATCH] credential: make relevance of http path configurable

When parsing a URL into a credential struct, we carefully
record each part of the URL, including the path on the
remote host, and use the result as part of the credential
context.

This had two practical implications:

  1. Credential helpers which store a credential for later
     access are likely to use the "path" portion as part of
     the storage key. That means that a request to

       https://example.com/foo.git

     would not use the same credential that was stored in an
     earlier request for:

       https://example.com/bar.git

  2. The prompt shown to the user includes all relevant
     context, including the path.

In most cases, however, users will have a single password
per host. The behavior in (1) will be inconvenient, and the
prompt in (2) will be overly long.

This patch introduces a config option to toggle the
relevance of http paths. When turned on, we use the path as
before. When turned off, we drop the path component from the
context: helpers don't see it, and it does not appear in the
prompt.

This is nothing you couldn't do with a clever credential
helper at the start of your stack, like:

  [credential "http://"]
	helper = "!f() { grep -v ^path= ; }; f"
	helper = your_real_helper

But doing this:

  [credential]
	useHttpPath = false

is way easier and more readable. Furthermore, since most
users will want the "off" behavior, that is the new default.
Users who want it "on" can set the variable (either for all
credentials, or just for a subset using
credential.*.useHttpPath).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 credential.c           | 14 ++++++++++++++
 credential.h           |  3 ++-
 t/t0300-credentials.sh | 29 +++++++++++++++++++++++++++++
 t/t5550-http-fetch.sh  |  2 +-
 4 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/credential.c b/credential.c
index 3c17ea197..a17eafea5 100644
--- a/credential.c
+++ b/credential.c
@@ -69,16 +69,30 @@ static int credential_config_callback(const char *var, const char *value,
 		if (!c->username)
 			c->username = xstrdup(value);
 	}
+	else if (!strcmp(key, "usehttppath"))
+		c->use_http_path = git_config_bool(var, value);
 
 	return 0;
 }
 
+static int proto_is_http(const char *s)
+{
+	if (!s)
+		return 0;
+	return !strcmp(s, "https") || !strcmp(s, "http");
+}
+
 static void credential_apply_config(struct credential *c)
 {
 	if (c->configured)
 		return;
 	git_config(credential_config_callback, c);
 	c->configured = 1;
+
+	if (!c->use_http_path && proto_is_http(c->protocol)) {
+		free(c->path);
+		c->path = NULL;
+	}
 }
 
 static void credential_describe(struct credential *c, struct strbuf *out)
diff --git a/credential.h b/credential.h
index e5042723a..96ea41bd1 100644
--- a/credential.h
+++ b/credential.h
@@ -6,7 +6,8 @@
 struct credential {
 	struct string_list helpers;
 	unsigned approved:1,
-		 configured:1;
+		 configured:1,
+		 use_http_path:1;
 
 	char *username;
 	char *password;
diff --git a/t/t0300-credentials.sh b/t/t0300-credentials.sh
index 53e94bc03..885af8fb6 100755
--- a/t/t0300-credentials.sh
+++ b/t/t0300-credentials.sh
@@ -247,4 +247,33 @@ test_expect_success 'pull username from config' '
 	EOF
 '
 
+test_expect_success 'http paths can be part of context' '
+	check fill "verbatim foo bar" <<-\EOF &&
+	protocol=https
+	host=example.com
+	path=foo.git
+	--
+	username=foo
+	password=bar
+	--
+	verbatim: get
+	verbatim: protocol=https
+	verbatim: host=example.com
+	EOF
+	test_config credential.https://example.com.useHttpPath true &&
+	check fill "verbatim foo bar" <<-\EOF
+	protocol=https
+	host=example.com
+	path=foo.git
+	--
+	username=foo
+	password=bar
+	--
+	verbatim: get
+	verbatim: protocol=https
+	verbatim: host=example.com
+	verbatim: path=foo.git
+	EOF
+'
+
 test_done
diff --git a/t/t5550-http-fetch.sh b/t/t5550-http-fetch.sh
index 3262f903e..95a133d69 100755
--- a/t/t5550-http-fetch.sh
+++ b/t/t5550-http-fetch.sh
@@ -53,7 +53,7 @@ test_expect_success 'setup askpass helpers' '
 '
 
 expect_askpass() {
-	dest=$HTTPD_DEST/auth/repo.git
+	dest=$HTTPD_DEST
 	{
 		case "$1" in
 		none)
-- 
2.30.2