[PATCH v4 3/5] real_path: create real_pathdup

[Brandon Williams <bmwill@google.com>]

Create real_pathdup which returns a caller owned string of the resolved
realpath based on the provide path.

Signed-off-by: Brandon Williams <bmwill@google.com>
---
 abspath.c | 13 +++++++++++++
 cache.h   |  1 +
 2 files changed, 14 insertions(+)

diff --git a/abspath.c b/abspath.c
index c3a6acd4d..f4283f465 100644
--- a/abspath.c
+++ b/abspath.c
@@ -205,6 +205,19 @@ const char *real_path_if_valid(const char *path)
 	return strbuf_realpath(&realpath, path, 0);
 }
 
+char *real_pathdup(const char *path)
+{
+	struct strbuf realpath = STRBUF_INIT;
+	char *retval = NULL;
+
+	if (strbuf_realpath(&realpath, path, 0))
+		retval = strbuf_detach(&realpath, NULL);
+
+	strbuf_release(&realpath);
+
+	return retval;
+}
+
 /*
  * Use this to get an absolute path from a relative one. If you want
  * to resolve links, you should use real_path.
diff --git a/cache.h b/cache.h
index 7a8129403..e12a5d912 100644
--- a/cache.h
+++ b/cache.h
@@ -1068,6 +1068,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
 		      int die_on_error);
 const char *real_path(const char *path);
 const char *real_path_if_valid(const char *path);
+char *real_pathdup(const char *path);
 const char *absolute_path(const char *path);
 const char *remove_leading_path(const char *in, const char *prefix);
 const char *relative_path(const char *in, const char *prefix, struct strbuf *sb);
-- 
2.11.0.390.gc69c2f50cf-goog