finder: escape [ in pattern

We only use *, so add necessary escaping.

Fixes WEBLATE-504

CHANGES.rst

@@ -6,6 +6,7 @@ Changelog
 
 * Not yet released.
 * Fixed detection UTF-16 Strings files.
+* Fixed detection of files with some special chars.
 
 2.15
 ----

translation_finder/finder.py

@@ -102,6 +102,8 @@ def has_dir(self, name: str):
 
     def mask_matches(self, mask: str):
         """Return all mask matches."""
+        # Avoid dealing [ as a special char
+        mask = mask.replace("[", "[[]").replace("?", "[?]")
         for name, path in self.files:
             if fnmatch(name, mask):
                 yield path

translation_finder/test_discovery.py

@@ -895,6 +895,27 @@ def test_basic(self):
             ],
         )
 
+    def test_shell_chars(self):
+        discovery = JSONDiscovery(
+            self.get_finder(
+                [
+                    "src/app/[locale]/_translations/en.json",
+                    "src/app/[locale]/_translations/de.json",
+                    "src/app/[locale]/_translations/cs.json",
+                ]
+            )
+        )
+        self.assert_discovery(
+            discovery.discover(),
+            [
+                {
+                    "filemask": "src/app/[locale]/_translations/*.json",
+                    "file_format": "json-nested",
+                    "template": "src/app/[locale]/_translations/en.json",
+                },
+            ],
+        )
+
     def test_json_data(self):
         """
         Test discovery on huge list of JSON files.