[PATCH v4 2/3] clone: do not use port number as dir name

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If the URI contains a port number and the URI's path component is
empty we fail to guess a sensible directory name. E.g. cloning a
repository 'ssh://example.com:2222/' we guess a directory name
'2222' where we would want the hostname only, e.g. 'example.com'.

Fix this by stripping trailing port numbers.

Signed-off-by: Patrick Steinhardt <ps@xxxxxx>
---
 builtin/clone.c          | 17 +++++++++++++++++
 t/t5603-clone-dirname.sh |  7 ++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index 3ddf8b9..7d93e13 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -181,6 +181,23 @@ static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
 	}
 
 	/*
+	 * Strip trailing port number if we've got only a
+	 * hostname (that is, there is no dir separator but a
+	 * colon). This check is required such that we do not
+	 * strip URI's like '/foo/bar:2222.git', which should
+	 * result in a dir '2222' being guessed due to backwards
+	 * compatibility.
+	 */
+	if (memchr(start, '/', end - start) == NULL
+	    && memchr(start, ':', end - start) != NULL) {
+		ptr = end;
+		while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
+			ptr--;
+		if (start < ptr && ptr[-1] == ':')
+			end = ptr - 1;
+	}
+
+	/*
 	 * Find last component. To remain backwards compatible we
 	 * also regard colons as path separators, such that
 	 * cloning a repository 'foo:bar.git' would result in a
diff --git a/t/t5603-clone-dirname.sh b/t/t5603-clone-dirname.sh
index 3a454f9..27dbd6c 100755
--- a/t/t5603-clone-dirname.sh
+++ b/t/t5603-clone-dirname.sh
@@ -63,8 +63,13 @@ test_clone_dir ssh://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://host:1234/ host
 test_clone_dir ssh://user@host/ host
 test_clone_dir ssh://user:password@host/ host
+test_clone_dir ssh://user:password@host:1234/ host
+
+# 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
-- 
2.5.0

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