[PATCH] Support for more CURL SSL settings via environment variables

Added support for additional CURL SSL settings via environment variables.
Client certificate/key files can be specified as well as alternate CA
information.
Signed-off-by: NNick Hengeveld <nickh@reactrix.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

http-fetch.c

@@ -36,6 +36,10 @@ static int local;
 static int zret;
 
 static int curl_ssl_verify;
+static char *ssl_cert;
+static char *ssl_key;
+static char *ssl_capath;
+static char *ssl_cainfo;
 
 struct buffer
 {
@@ -522,6 +526,21 @@ int main(int argc, char **argv)
 	curl_easy_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
 #endif
 
+	if ((ssl_cert = getenv("GIT_SSL_CERT")) != NULL) {
+		curl_easy_setopt(curl, CURLOPT_SSLCERT, ssl_cert);
+	}
+	if ((ssl_key = getenv("GIT_SSL_KEY")) != NULL) {
+		curl_easy_setopt(curl, CURLOPT_SSLKEY, ssl_key);
+	}
+#if LIBCURL_VERSION_NUM >= 0x070908
+	if ((ssl_capath = getenv("GIT_SSL_CAPATH")) != NULL) {
+		curl_easy_setopt(curl, CURLOPT_CAPATH, ssl_capath);
+	}
+#endif
+	if ((ssl_cainfo = getenv("GIT_SSL_CAINFO")) != NULL) {
+		curl_easy_setopt(curl, CURLOPT_CAINFO, ssl_cainfo);
+	}
+
 	alt = xmalloc(sizeof(*alt));
 	alt->base = url;
 	alt->got_indices = 0;