1 files changed, 76 insertions, 7 deletions

diff --git a/compat/mingw.c b/compat/mingw.c
index 54c82ec..a8218e6 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -286,6 +286,49 @@ int mingw_rmdir(const char *pathname)
 	return ret;
 }
 
+static inline int needs_hiding(const char *path)
+{
+	const char *basename;
+
+	if (hide_dotfiles == HIDE_DOTFILES_FALSE)
+		return 0;
+
+	/* We cannot use basename(), as it would remove trailing slashes */
+	mingw_skip_dos_drive_prefix((char **)&path);
+	if (!*path)
+		return 0;
+
+	for (basename = path; *path; path++)
+		if (is_dir_sep(*path)) {
+			do {
+				path++;
+			} while (is_dir_sep(*path));
+			/* ignore trailing slashes */
+			if (*path)
+				basename = path;
+		}
+
+	if (hide_dotfiles == HIDE_DOTFILES_TRUE)
+		return *basename == '.';
+
+	assert(hide_dotfiles == HIDE_DOTFILES_DOTGITONLY);
+	return !strncasecmp(".git", basename, 4) &&
+		(!basename[4] || is_dir_sep(basename[4]));
+}
+
+static int set_hidden_flag(const wchar_t *path, int set)
+{
+	DWORD original = GetFileAttributesW(path), modified;
+	if (set)
+		modified = original | FILE_ATTRIBUTE_HIDDEN;
+	else
+		modified = original & ~FILE_ATTRIBUTE_HIDDEN;
+	if (original == modified || SetFileAttributesW(path, modified))
+		return 0;
+	errno = err_win_to_posix(GetLastError());
+	return -1;
+}
+
 int mingw_mkdir(const char *path, int mode)
 {
 	int ret;
@@ -293,6 +336,8 @@ int mingw_mkdir(const char *path, int mode)
 	if (xutftowcs_path(wpath, path) < 0)
 		return -1;
 	ret = _wmkdir(wpath);
+	if (!ret && needs_hiding(path))
+		return set_hidden_flag(wpath, 1);
 	return ret;
 }
 
@@ -319,6 +364,21 @@ int mingw_open (const char *filename, int oflags, ...)
 		if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
 			errno = EISDIR;
 	}
+	if ((oflags & O_CREAT) && needs_hiding(filename)) {
+		/*
+		 * Internally, _wopen() uses the CreateFile() API which errors
+		 * out with an ERROR_ACCESS_DENIED if CREATE_ALWAYS was
+		 * specified and an already existing file's attributes do not
+		 * match *exactly*. As there is no mode or flag we can set that
+		 * would correspond to FILE_ATTRIBUTE_HIDDEN, let's just try
+		 * again *without* the O_CREAT flag (that corresponds to the
+		 * CREATE_ALWAYS flag of CreateFile()).
+		 */
+		if (fd < 0 && errno == EACCES)
+			fd = _wopen(wfilename, oflags & ~O_CREAT, mode);
+		if (fd >= 0 && set_hidden_flag(wfilename, 1))
+			warning("could not mark '%s' as hidden.", filename);
+	}
 	return fd;
 }
 
@@ -350,6 +410,7 @@ int mingw_fgetc(FILE *stream)
 #undef fopen
 FILE *mingw_fopen (const char *filename, const char *otype)
 {
+	int hide = needs_hiding(filename);
 	FILE *file;
 	wchar_t wfilename[MAX_PATH], wotype[4];
 	if (filename && !strcmp(filename, "/dev/null"))
@@ -357,12 +418,19 @@ FILE *mingw_fopen (const char *filename, const char *otype)
 	if (xutftowcs_path(wfilename, filename) < 0 ||
 		xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
 		return NULL;
+	if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
+		error("could not unhide %s", filename);
+		return NULL;
+	}
 	file = _wfopen(wfilename, wotype);
+	if (file && hide && set_hidden_flag(wfilename, 1))
+		warning("could not mark '%s' as hidden.", filename);
 	return file;
 }
 
 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
 {
+	int hide = needs_hiding(filename);
 	FILE *file;
 	wchar_t wfilename[MAX_PATH], wotype[4];
 	if (filename && !strcmp(filename, "/dev/null"))
@@ -370,7 +438,13 @@ FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
 	if (xutftowcs_path(wfilename, filename) < 0 ||
 		xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
 		return NULL;
+	if (hide && !access(filename, F_OK) && set_hidden_flag(wfilename, 0)) {
+		error("could not unhide %s", filename);
+		return NULL;
+	}
 	file = _wfreopen(wfilename, wotype, stream);
+	if (file && hide && set_hidden_flag(wfilename, 1))
+		warning("could not mark '%s' as hidden.", filename);
 	return file;
 }
 
@@ -763,15 +837,12 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 
 char *mingw_getcwd(char *pointer, int len)
 {
-	int i;
 	wchar_t wpointer[MAX_PATH];
 	if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
 		return NULL;
 	if (xwcstoutf(pointer, wpointer, len) < 0)
 		return NULL;
-	for (i = 0; pointer[i]; i++)
-		if (pointer[i] == '\\')
-			pointer[i] = '/';
+	convert_slashes(pointer);
 	return pointer;
 }
 
@@ -2112,9 +2183,7 @@ static void setup_windows_environment()
 		 * executable (by not mistaking the dir separators
 		 * for escape characters).
 		 */
-		for (; *tmp; tmp++)
-			if (*tmp == '\\')
-				*tmp = '/';
+		convert_slashes(tmp);
 	}
 
 	/* simulate TERM to enable auto-color (see color.c) */