From b311ee0d5994ec67f3260b23d0054a7dfe1d1283 Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Fri, 31 Jan 2020 11:44:31 +0100
Subject: [PATCH] strbuf_realpath(): use platform-dependent API if available

Some platforms (e.g. Windows) provide API functions to resolve paths
much quicker. Let's offer a way to short-cut `strbuf_realpath()` on
those platforms.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 abspath.c         | 3 +++
 git-compat-util.h | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/abspath.c b/abspath.c
index 39e06b5848..7a5f114382 100644
--- a/abspath.c
+++ b/abspath.c
@@ -91,6 +91,9 @@ static char *strbuf_realpath_1(struct strbuf *resolved, const char *path,
 			goto error_out;
 	}
 
+	if (platform_strbuf_realpath(resolved, path))
+		return resolved->buf;
+
 	strbuf_addstr(&remaining, path);
 	get_root_part(resolved, &remaining);
 
diff --git a/git-compat-util.h b/git-compat-util.h
index 4f0028ce60..00a6db056c 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -560,6 +560,10 @@ static inline int git_has_dir_sep(const char *path)
 #define query_user_email() NULL
 #endif
 
+#ifndef platform_strbuf_realpath
+#define platform_strbuf_realpath(resolved, path) NULL
+#endif
+
 #ifdef __TANDEM
 #include <floss.h(floss_execl,floss_execlp,floss_execv,floss_execvp)>
 #include <floss.h(floss_getpwuid)>