Redefine PATH_MAX to allow all Git operations to take advantage of Wi…

…ndows long path support.

Signed-off-by: Lucas Zadrozny <[email protected]>

git-compat-util.h

@@ -437,6 +437,19 @@ char *gitdirname(char *);
 #define PATH_MAX 4096
 #endif
 
+/* PATH_MAX is inherited from mingw64/include/limits.h, with a value of 260.
+ * The problem is that even after enabling Windows long path support and
+ * 'core.longpaths' there are still some Git operations that will fail, such
+ * as cloning a submodule (see setup_explicit_git_dir).
+ * 
+ * I've observed some CI runners that have temp clones in a deeply nested
+ * path which will break even some medium sized repository paths.
+ * 
+ * Redefining this macro addresses that issue.
+ */
+#undef PATH_MAX
+#define PATH_MAX MAX_LONG_PATH
+
 #ifndef NAME_MAX
 #define NAME_MAX 255
 #endif