[PATCH 7/8] ssh: 'simple' variant does not support -4/-6

[Jonathan Nieder]

If the user passes -4/--ipv4 or -6/--ipv6 to "git fetch" or "git push"
and the ssh command configured with GIT_SSH does not support such a
setting, error out instead of ignoring the option and continuing.

Signed-off-by: Jonathan Nieder <jrnie...@gmail.com>
Acked-by: Stefan Beller <sbel...@google.com>
---
As before.

 connect.c        | 25 ++++++++++++++++++++++---
 t/t5601-clone.sh | 12 ++++++------
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/connect.c b/connect.c
index 455c54a2ec..be106d1868 100644
--- a/connect.c
+++ b/connect.c
@@ -938,11 +938,30 @@ static void push_ssh_options(struct argv_array *args, 
struct argv_array *env,
                                 get_protocol_version_config());
        }
 
-       if (variant != VARIANT_SIMPLE) {
-               if (flags & CONNECT_IPV4)
+       if (flags & CONNECT_IPV4) {
+               switch (variant) {
+               case VARIANT_AUTO:
+                       BUG("VARIANT_AUTO passed to push_ssh_options");
+               case VARIANT_SIMPLE:
+                       die("ssh variant 'simple' does not support -4");
+               case VARIANT_SSH:
+               case VARIANT_PLINK:
+               case VARIANT_PUTTY:
+               case VARIANT_TORTOISEPLINK:
                        argv_array_push(args, "-4");
-               else if (flags & CONNECT_IPV6)
+               }
+       } else if (flags & CONNECT_IPV6) {
+               switch (variant) {
+               case VARIANT_AUTO:
+                       BUG("VARIANT_AUTO passed to push_ssh_options");
+               case VARIANT_SIMPLE:
+                       die("ssh variant 'simple' does not support -6");
+               case VARIANT_SSH:
+               case VARIANT_PLINK:
+               case VARIANT_PUTTY:
+               case VARIANT_TORTOISEPLINK:
                        argv_array_push(args, "-6");
+               }
        }
 
        if (variant == VARIANT_TORTOISEPLINK)
diff --git a/t/t5601-clone.sh b/t/t5601-clone.sh
index 209e2d5604..ad910ae9fa 100755
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -364,9 +364,10 @@ test_expect_success 'OpenSSH variant passes -4' '
        expect_ssh "-4 -p 123" myhost src
 '
 
-test_expect_success 'variant can be overriden' '
-       git -c ssh.variant=simple clone -4 "[myhost:123]:src" ssh-simple-clone 
&&
-       expect_ssh myhost src
+test_expect_success 'variant can be overridden' '
+       copy_ssh_wrapper_as "$TRASH_DIRECTORY/putty" &&
+       git -c ssh.variant=putty clone -4 "[myhost:123]:src" ssh-putty-clone &&
+       expect_ssh "-4 -P 123" myhost src
 '
 
 test_expect_success 'variant=auto picks based on basename' '
@@ -375,10 +376,9 @@ test_expect_success 'variant=auto picks based on basename' 
'
        expect_ssh "-4 -P 123" myhost src
 '
 
-test_expect_success 'simple is treated as simple' '
+test_expect_success 'simple does not support -4/-6' '
        copy_ssh_wrapper_as "$TRASH_DIRECTORY/simple" &&
-       git clone -4 "[myhost:123]:src" ssh-bracket-clone-simple &&
-       expect_ssh myhost src
+       test_must_fail git clone -4 "[myhost:123]:src" ssh-bracket-clone-simple
 '
 
 test_expect_success 'uplink is treated as simple' '
-- 
2.15.0.448.gf294e3d99a