check font in automatic test (#698)

* check font in automatic test

* fix `description` in `action.yml`

* check font first
because it's faster

* add link to missing character

* fix grammar error

* fix grammar error again

* fix SHA error

* fix one-line error to align with github

* fix: make line-number start from 1

.github/actions/automatic-test/action.yml

@@ -4,6 +4,34 @@ description: 'Check for obvious errors.'
 runs:
   using: "composite"
   steps:
+  - name: Prepare FontTools
+    shell: bash
+    run: |
+      pip install fonttools
+  - name: Check all characters are in the font
+    shell: python
+    run: |
+      from fontTools.ttLib import TTFont
+      from pathlib import Path
+      from os import environ as env
+
+      font = TTFont('parts/fonts/proportional.otf')
+      keys = set(font.getBestCmap().keys())
+
+      missing = []
+      for file in Path('parts/language').glob('*.lua'):
+        for i, line in enumerate(file.read_text().splitlines()):
+          for char in line:
+            if ord(char) not in keys:
+              missing.append((char, file, i+1))
+
+      if missing:
+        print('Missing characters:')
+        for char, file, i in missing:
+          print(f"'{char}'({ord(char):x}) in {file} at line {i} (https://github.com/26F-Studio/Techmino/blob/{env['GITHUB_SHA']}/{file}#L{i})")
+        exit(1)
+      else:
+        print('All characters are present in the font.')
   - uses: ./.github/actions/build-love
     with:
       file-path: Techmino.love