[PATCH 06/19] mingw: try to delete target directory before renaming

[Johannes Schindelin]

From: 마누엘 <na...@users.noreply.github.com>

When the rename() function tries to move a directory it fails if the
target directory exists. It should check if it can delete the (possibly
empty) target directory and then try again to move the directory.

This partially fixes t9100-git-svn-basic.sh.

Signed-off-by: 마누엘 <na...@users.noreply.github.com>
Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
 compat/mingw.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/compat/mingw.c b/compat/mingw.c
index db92f5d..e4839b9 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1603,7 +1603,12 @@ repeat:
        if (gle == ERROR_ACCESS_DENIED &&
            (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
                if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
-                       errno = EISDIR;
+                       DWORD attrsold = GetFileAttributesW(wpold);
+                       if (attrsold == INVALID_FILE_ATTRIBUTES ||
+                           !(attrsold & FILE_ATTRIBUTE_DIRECTORY))
+                               errno = EISDIR;
+                       else if (!_wrmdir(wpnew))
+                               goto repeat;
                        return -1;
                }
                if ((attrs & FILE_ATTRIBUTE_READONLY) &&
-- 
2.7.0.windows.1.7.g55a05c8