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

Fix this by first skipping authentication data.

Signed-off-by: Patrick Steinhardt <p...@pks.im>
---
 builtin/clone.c | 46 +++++++++++++++++++++++++++++++++++-----------
 1 file changed, 35 insertions(+), 11 deletions(-)

diff --git a/builtin/clone.c b/builtin/clone.c
index a72ff7e..794a933 100644
--- a/builtin/clone.c
+++ b/builtin/clone.c
@@ -146,35 +146,59 @@ static char *get_repo_path(const char *repo, int 
*is_bundle)
 
 static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
 {
-       const char *end = repo + strlen(repo), *start;
+       const char *end = repo + strlen(repo), *start, *ptr;
        size_t len;
        char *dir;
 
        /*
+        * Skip scheme.
+        */
+       start = strstr(repo, "://");
+       if (start == NULL)
+               start = repo;
+       else
+               start += 3;
+
+       /*
+        * Skip authentication data.
+        */
+       ptr = start;
+       while (ptr < end && !is_dir_sep(*ptr) && *ptr != '@')
+               ptr++;
+       if (*ptr == '@')
+               start = ptr + 1;
+
+       /*
         * Strip trailing spaces, slashes and /.git
         */
-       while (repo < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
+       while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
                end--;
-       if (end - repo > 5 && is_dir_sep(end[-5]) &&
+       if (end - start > 5 && is_dir_sep(end[-5]) &&
            !strncmp(end - 4, ".git", 4)) {
                end -= 5;
-               while (repo < end && is_dir_sep(end[-1]))
+               while (start < end && is_dir_sep(end[-1]))
                        end--;
        }
 
        /*
-        * Find last component, but be prepared that repo could have
-        * the form  "remote.example.com:foo.git", i.e. no slash
-        * in the directory part.
+        * 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
+        * directory 'bar' being guessed. This is skipped if the
+        * current path does not contain any path separators.
         */
-       start = end;
-       while (repo < start && !is_dir_sep(start[-1]) && start[-1] != ':')
-               start--;
+       if (memchr(start, '/', end - start) != NULL
+           || memchr(start, ':', end - start) != NULL) {
+               start = end;
+               while (!is_dir_sep(start[-1]) && start[-1] != ':')
+                       start--;
+       }
+       len = end - start;
 
        /*
         * Strip .{bundle,git}.
         */
-       strip_suffix(start, is_bundle ? ".bundle" : ".git" , &len);
+       strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
 
        if (is_bare)
                dir = xstrfmt("%.*s.git", (int)len, start);
-- 
2.5.0

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