Implement normalize_absolute_path

normalize_absolute_path removes several oddities form absolute paths,
giving nice clean paths like "/dir/sub1/sub2".  Also add a test case
for this utility, based on a new test program (in the style of test-sha1).

Signed-off-by: David Reiss <dreiss@facebook.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/test-path-utils.c b/test-path-utils.c
new file mode 100644
index 000000000..1bd43216f
--- /dev/null
+++ b/test-path-utils.c
@@ -0,0 +1,13 @@
+#include "cache.h"
+
+int main(int argc, char **argv)
+{
+	if (argc == 3 && !strcmp(argv[1], "normalize_absolute_path")) {
+		char *buf = xmalloc(strlen(argv[2])+1);
+		int rv = normalize_absolute_path(buf, argv[2]);
+		assert(strlen(buf) == rv);
+		puts(buf);
+	}
+
+	return 0;
+}