Template refactor (#385)

* Initial implementation of new textx parser for template

* Implemented parser as singleton

* Moved grammar to .tx file

* Added filter templates

* Added filter templates

* Added tests for nested templates

* Added tests for filter+path_sep

* Added tests for filter+path_sep

* Added punctuation templates

* Added hook for --replace-keywords

* Updated docs for phototemplate

* Updated docs for phototemplate

* Updated tests data

* Updated tests data

* Updated docs for phototemplate

* Version bump

* Updated CLI help

* Fixed template processing for boolean, default

tests/photoinfo_mock.py

@@ -0,0 +1,48 @@
+"""Selectively mock a PhotoInfo object"""
+
+from osxphotos import PhotoInfo
+
+
+class PhotoInfoMock(PhotoInfo):
+    def __init__(self, photo, **kwargs):
+        self._photo = photo
+        self._db = photo._db
+        self._info = photo._info
+
+        for kw in kwargs:
+            if hasattr(photo, kw):
+                setattr(self, f"_mock_{kw}", kwargs[kw])
+            else:
+                raise ValueError(f"Not a PhotoInfo attribute: {kw}")
+
+    @property
+    def hdr(self):
+        return (
+            self._mock_hdr
+            if getattr(self, "_mock_hdr", None) is not None
+            else self._photo.hdr
+        )
+
+    @property
+    def hasadjustments(self):
+        return (
+            self._mock_hasadjustments
+            if getattr(self, "_mock_hasadjustments", None) is not None
+            else self._photo.hasadjustments
+        )
+
+    @property
+    def keywords(self):
+        return (
+            self._mock_keywords
+            if getattr(self, "_mock_keywords", None) is not None
+            else self._photo.keywords
+        )
+
+    @property
+    def title(self):
+        return (
+            self._mock_title
+            if getattr(self, "_mock_title", None) is not None
+            else self._photo.title
+        )