Merge branch 'jk/guess-repo-name-regression-fix' into maint

"git clone $URL" in recent releases of Git contains a regression in
the code that invents a new repository name incorrectly based on
the $URL.  This has been corrected.

* jk/guess-repo-name-regression-fix:
  clone: use computed length in guess_dir_name
  clone: add tests for output directory

builtin/clone.c

@@ -174,7 +174,8 @@ static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
 	/*
 	 * Strip .{bundle,git}.
 	 */
-	strip_suffix(start, is_bundle ? ".bundle" : ".git" , &len);
+	len = end - start;
+	strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
 
 	if (is_bare)
 		dir = xstrfmt("%.*s.git", (int)len, start);

t/t5603-clone-dirname.sh

@@ -0,0 +1,106 @@
+#!/bin/sh
+
+test_description='check output directory names used by git-clone'
+. ./test-lib.sh
+
+# we use a fake ssh wrapper that ignores the arguments
+# entirely; we really only care that we get _some_ repo,
+# as the real test is what clone does on the local side
+test_expect_success 'setup ssh wrapper' '
+	write_script "$TRASH_DIRECTORY/ssh-wrapper" <<-\EOF &&
+	git upload-pack "$TRASH_DIRECTORY"
+	EOF
+	GIT_SSH="$TRASH_DIRECTORY/ssh-wrapper" &&
+	export GIT_SSH &&
+	export TRASH_DIRECTORY
+'
+
+# make sure that cloning $1 results in local directory $2
+test_clone_dir () {
+	url=$1; shift
+	dir=$1; shift
+	expect=success
+	bare=non-bare
+	clone_opts=
+	for i in "$@"
+	do
+		case "$i" in
+		fail)
+			expect=failure
+			;;
+		bare)
+			bare=bare
+			clone_opts=--bare
+			;;
+		esac
+	done
+	test_expect_$expect "clone of $url goes to $dir ($bare)" "
+		rm -rf $dir &&
+		git clone $clone_opts $url &&
+		test_path_is_dir $dir
+	"
+}
+
+# basic syntax with bare and non-bare variants
+test_clone_dir host:foo foo
+test_clone_dir host:foo foo.git bare
+test_clone_dir host:foo.git foo
+test_clone_dir host:foo.git foo.git bare
+test_clone_dir host:foo/.git foo
+test_clone_dir host:foo/.git foo.git bare
+
+# similar, but using ssh URL rather than host:path syntax
+test_clone_dir ssh://host/foo foo
+test_clone_dir ssh://host/foo foo.git bare
+test_clone_dir ssh://host/foo.git foo
+test_clone_dir ssh://host/foo.git foo.git bare
+test_clone_dir ssh://host/foo/.git foo
+test_clone_dir ssh://host/foo/.git foo.git bare
+
+# we should remove trailing slashes and .git suffixes
+test_clone_dir ssh://host/foo/ foo
+test_clone_dir ssh://host/foo/// foo
+test_clone_dir ssh://host/foo/.git/ foo
+test_clone_dir ssh://host/foo.git/ foo
+test_clone_dir ssh://host/foo.git/// foo
+test_clone_dir ssh://host/foo///.git/ foo
+test_clone_dir ssh://host/foo/.git/// foo
+
+test_clone_dir host:foo/ foo
+test_clone_dir host:foo/// foo
+test_clone_dir host:foo.git/ foo
+test_clone_dir host:foo/.git/ foo
+test_clone_dir host:foo.git/// foo
+test_clone_dir host:foo///.git/ foo
+test_clone_dir host:foo/.git/// foo
+
+# omitting the path should default to the hostname
+test_clone_dir ssh://host/ host
+test_clone_dir ssh://host:1234/ host fail
+test_clone_dir ssh://user@host/ host fail
+test_clone_dir host:/ host fail
+
+# auth materials should be redacted
+test_clone_dir ssh://user:password@host/ host fail
+test_clone_dir ssh://user:password@host:1234/ host fail
+test_clone_dir ssh://user:passw@rd@host:1234/ host fail
+test_clone_dir user@host:/ host fail
+test_clone_dir user:password@host:/ host fail
+test_clone_dir user:passw@rd@host:/ host fail
+
+# auth-like material should not be dropped
+test_clone_dir ssh://host/foo@bar foo@bar
+test_clone_dir ssh://host/foo@bar.git foo@bar
+test_clone_dir ssh://user:password@host/foo@bar foo@bar
+test_clone_dir ssh://user:passw@rd@host/foo@bar.git foo@bar
+
+test_clone_dir host:/foo@bar foo@bar
+test_clone_dir host:/foo@bar.git foo@bar
+test_clone_dir user:password@host:/foo@bar foo@bar
+test_clone_dir user:passw@rd@host:/foo@bar.git foo@bar
+
+# trailing port-like numbers should not be stripped for paths
+test_clone_dir ssh://user:password@host/test:1234 1234
+test_clone_dir ssh://user:password@host/test:1234.git 1234
+
+test_done