t6023: merge-file fails to output anything for a degenerate merge

diff --git a/compat/mingw.c b/compat/mingw.c
index 3a05fe7da656ebb5d1699937013a1ab517bbee3c..45733f9e04eb87409a896898cb5a92b37e87a920 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -536,7 +536,8 @@ static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_on
                return xstrdup(path);
        path[strlen(path)-4] = '\0';
        if ((!exe_only || isexe) && access(path, F_OK) == 0)
-               return xstrdup(path);
+               if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
+                       return xstrdup(path);
        return NULL;
 }
 
@@ -864,6 +865,8 @@ int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
 #undef rename
 int mingw_rename(const char *pold, const char *pnew)
 {
+       DWORD attrs;
+
        /*
         * Try native rename() first to get errno right.
         * It is based on MoveFile(), which cannot overwrite existing files.
@@ -875,12 +878,19 @@ int mingw_rename(const char *pold, const char *pnew)
        if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
                return 0;
        /* TODO: translate more errors */
-       if (GetLastError() == ERROR_ACCESS_DENIED) {
-               DWORD attrs = GetFileAttributes(pnew);
-               if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
+       if (GetLastError() == ERROR_ACCESS_DENIED &&
+           (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
+               if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
                        errno = EISDIR;
                        return -1;
                }
+               if ((attrs & FILE_ATTRIBUTE_READONLY) &&
+                   SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
+                       if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
+                               return 0;
+                       /* revert file attributes on failure */
+                       SetFileAttributes(pnew, attrs);
+               }
        }
        errno = EACCES;
        return -1;
@@ -1017,3 +1027,25 @@ sig_handler_t mingw_signal(int sig, sig_handler_t handler)
        timer_fn = handler;
        return old;
 }
+
+static const char *make_backslash_path(const char *path)
+{
+       static char buf[PATH_MAX + 1];
+       char *c;
+
+       if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
+               die("Too long path: %.*s", 60, path);
+
+       for (c = buf; *c; c++) {
+               if (*c == '/')
+                       *c = '\\';
+       }
+       return buf;
+}
+
+void mingw_open_html(const char *unixpath)
+{
+       const char *htmlpath = make_backslash_path(unixpath);
+       printf("Launching default browser to display HTML ...\n");
+       ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
+}