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remote: use remote_is_configured() for add and rename

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Both remote add and remote rename use a slightly different hand-rolled
check if the remote exits.  The hand-rolled check may have some subtle
cases in which it might fail to detect when a remote already exists.
One such case was fixed in fb86e32 ("git remote: allow adding remotes
agreeing with url.<...>.insteadOf").  Another case is when a remote is
configured as follows:

  [remote "foo"]
    vcs = bar

If we try to run `git remote add foo bar` with the above remote
configuration, git segfaults.  This change fixes it.

In addition, git remote rename $existing foo with the configuration for
foo as above silently succeeds, even though foo already exists,
modifying its configuration.  With this patch it fails with "remote foo
already exists".

Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Gummerer 2016-02-16 10:47:52 +01:00 committed by Junio C Hamano
parent cc8e538d45
commit a31eeae27f
2 changed files with 17 additions and 5 deletions
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7
builtin/remote.c
View file

@ -186,10 +186,7 @@ static int add(int argc, const char **argv)
url = argv[1];
remote = remote_get(name);
if (remote && (remote->url_nr > 1 ||
(strcmp(name, remote->url[0]) &&
strcmp(url, remote->url[0])) ||
remote->fetch_refspec_nr))
if (remote_is_configured(remote))
die(_("remote %s already exists."), name);
strbuf_addf(&buf2, "refs/heads/test:refs/remotes/%s/test", name);
@ -641,7 +638,7 @@ static int mv(int argc, const char **argv)
return migrate_file(oldremote);
newremote = remote_get(rename.new);
if (newremote && (newremote->url_nr > 1 || newremote->fetch_refspec_nr))
if (remote_is_configured(newremote))
die(_("remote %s already exists."), rename.new);
strbuf_addf(&buf, "refs/heads/test:refs/remotes/%s/test", rename.new);

15
t/t5505-remote.sh
View file

@ -157,6 +157,21 @@ test_expect_success 'rename errors out early when deleting non-existent branch'
)
'
test_expect_success 'add existing foreign_vcs remote' '
test_config remote.foo.vcs bar &&
echo "fatal: remote foo already exists." >expect &&
test_must_fail git remote add foo bar 2>actual &&
test_i18ncmp expect actual
'
test_expect_success 'add existing foreign_vcs remote' '
test_config remote.foo.vcs bar &&
test_config remote.bar.vcs bar &&
echo "fatal: remote bar already exists." >expect &&
test_must_fail git remote rename foo bar 2>actual &&
test_i18ncmp expect actual
'
cat >test/expect <<EOF
* remote origin
Fetch URL: $(pwd)/one