connect: split ssh option computation to its own function

This puts the determination of options to pass to each ssh variant
(see ssh.variant in git-config(1)) in one place.

A follow-up patch will use this in an initial dry run to detect which
variant to use when the ssh command is ambiguous.

No functional change intended yet.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/connect.c b/connect.c
index 2113feb4f8ee6c92afd76286aa4a57a7a742303f..f3370510a6dbb63049d3f6171d7c534ac366777e 100644 (file)
--- a/connect.c
+++ b/connect.c
@@ -919,6 +919,42 @@ static struct child_process *git_connect_git(int fd[2], char *hostandport,
        return conn;
 }
 
+/*
+ * Append the appropriate environment variables to `env` and options to
+ * `args` for running ssh in Git's SSH-tunneled transport.
+ */
+static void push_ssh_options(struct argv_array *args, struct argv_array *env,
+                            enum ssh_variant variant, const char *port,
+                            int flags)
+{
+       if (variant == VARIANT_SSH &&
+           get_protocol_version_config() > 0) {
+               argv_array_push(args, "-o");
+               argv_array_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT);
+               argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
+                                get_protocol_version_config());
+       }
+
+       if (variant != VARIANT_SIMPLE) {
+               if (flags & CONNECT_IPV4)
+                       argv_array_push(args, "-4");
+               else if (flags & CONNECT_IPV6)
+                       argv_array_push(args, "-6");
+       }
+
+       if (variant == VARIANT_TORTOISEPLINK)
+               argv_array_push(args, "-batch");
+
+       if (port && variant != VARIANT_SIMPLE) {
+               if (variant == VARIANT_SSH)
+                       argv_array_push(args, "-p");
+               else
+                       argv_array_push(args, "-P");
+
+               argv_array_push(args, port);
+       }
+}
+
 /* Prepare a child_process for use by Git's SSH-tunneled transport. */
 static void fill_ssh_args(struct child_process *conn, const char *ssh_host,
                          const char *port, int flags)
@@ -947,34 +983,7 @@ static void fill_ssh_args(struct child_process *conn, const char *ssh_host,
        }
 
        argv_array_push(&conn->args, ssh);
-
-       if (variant == VARIANT_SSH &&
-           get_protocol_version_config() > 0) {
-               argv_array_push(&conn->args, "-o");
-               argv_array_push(&conn->args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT);
-               argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d",
-                                get_protocol_version_config());
-       }
-
-       if (variant != VARIANT_SIMPLE) {
-               if (flags & CONNECT_IPV4)
-                       argv_array_push(&conn->args, "-4");
-               else if (flags & CONNECT_IPV6)
-                       argv_array_push(&conn->args, "-6");
-       }
-
-       if (variant == VARIANT_TORTOISEPLINK)
-               argv_array_push(&conn->args, "-batch");
-
-       if (port && variant != VARIANT_SIMPLE) {
-               if (variant == VARIANT_SSH)
-                       argv_array_push(&conn->args, "-p");
-               else
-                       argv_array_push(&conn->args, "-P");
-
-               argv_array_push(&conn->args, port);
-       }
-
+       push_ssh_options(&conn->args, &conn->env_array, variant, port, flags);
        argv_array_push(&conn->args, ssh_host);
 }