apply: handle filenames with double slashes better

When there are duplicated slashes in pathnames, like this:

	--- a/perl//Git.pm
	+++ b/perl//Git.pm
	@@ -1358,3 +1358,4 @@

	 1; # Famous last words
	+# test

the paths gleaned from the patch header won't be found in the index and
cause "apply --index" and "apply --cached" to fail.

Fix this by squashing the duplicated slashes upon input.

Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-apply.c b/builtin-apply.c
index 8a3771e87e1ef2ac7a1ee70133b8206f0f18cbb5..660aab95df2cb4520601ae212f8c3f2abba0e408 100644 (file)
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -320,6 +320,20 @@ static int name_terminate(const char *name, int namelen, int c, int terminate)
        return 1;
 }
 
+/* remove double slashes to make --index work with such filenames */
+static char *squash_slash(char *name)
+{
+       int i = 0, j = 0;
+
+       while (name[i]) {
+               if ((name[j++] = name[i++]) == '/')
+                       while (name[i] == '/')
+                               i++;
+       }
+       name[j] = '\0';
+       return name;
+}
+
 static char *find_name(const char *line, char *def, int p_value, int terminate)
 {
        int len;
@@ -349,7 +363,7 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                                free(def);
                                if (root)
                                        strbuf_insert(&name, 0, root, root_len);
-                               return strbuf_detach(&name, NULL);
+                               return squash_slash(strbuf_detach(&name, NULL));
                        }
                }
                strbuf_release(&name);
@@ -369,10 +383,10 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                        start = line;
        }
        if (!start)
-               return def;
+               return squash_slash(def);
        len = line - start;
        if (!len)
-               return def;
+               return squash_slash(def);
 
        /*
         * Generally we prefer the shorter name, especially
@@ -383,7 +397,7 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
        if (def) {
                int deflen = strlen(def);
                if (deflen < len && !strncmp(start, def, deflen))
-                       return def;
+                       return squash_slash(def);
                free(def);
        }
 
@@ -392,10 +406,10 @@ static char *find_name(const char *line, char *def, int p_value, int terminate)
                strcpy(ret, root);
                memcpy(ret + root_len, start, len);
                ret[root_len + len] = '\0';
-               return ret;
+               return squash_slash(ret);
        }
 
-       return xmemdupz(start, len);
+       return squash_slash(xmemdupz(start, len));
 }
 
 static int count_slashes(const char *cp)