Modernise revealjs build.py (still not good)

revealjs/build.py

@@ -9,75 +9,85 @@ from commonmark import commonmark
 
 # "template macros"
 template_replace = [
-    ('<notes>', '<aside class="notes">\n'),
-    ('</notes>', '\n</aside>'),
+    ("<notes>", '<aside class="notes">\n'),
+    ("</notes>", "\n</aside>"),
 ]
 
-try:
-    directory = os.path.dirname(sys.argv[1])
-    print(f'Processing {directory}…')
-except IndexError:
-    print(f'USAGE: {sys.argv[0]} path/to/index.html', file=sys.stderr)
-    sys.exit(1)
+directory = os.path.dirname(sys.argv[1])
 
-template_env = Environment(loader=FileSystemLoader(os.path.join(directory, '../_templates')))
+template_env = Environment(
+    loader=FileSystemLoader(os.path.join(directory, "../_templates"))
+)
 
-if not os.path.isfile(os.path.join(directory, 'index.md')):
-    print(f'{directory} is not valid: missing index.md')
-    sys.exit(1)
+if not os.path.isfile(os.path.join(directory, "index.md")):
+    raise Exception("{directory} is missing index.md")
 
-files = ['index.md']
-files.extend(sorted(filter(lambda x: os.path.isfile(os.path.join(directory, x)) and re.match('.*\.md$', x) and x != 'index.md', os.listdir(directory))))
+files = ["index.md"]
+files.extend(
+    sorted(
+        [
+            file
+            for file in os.listdir(directory)
+            if os.path.isfile(os.path.join(directory, file))
+            and re.match(".*\.md$", file)
+            and file != "index.md"
+        ]
+    )
+)
 
 config = {
-    'theme': '../_assets/reveal.js/css/theme/black.css',
-    'mathjax': False,
-    'controls': True,
-    'progress': True,
-    'history': True,
-    'center': True,
-    'show_notes': False, # on print
-    'width': 1280,
-    'height': 800,
-    'transition': 'none', # none, fade, slide, convex, concave, zoom
-    'background_transition': 'none'
+    "theme": "../_assets/reveal.js/css/theme/black.css",
+    "mathjax": False,
+    "controls": True,
+    "progress": True,
+    "history": True,
+    "center": True,
+    "show_notes": False,  # on print
+    "width": 1280,
+    "height": 800,
+    "transition": "none",  # none, fade, slide, convex, concave, zoom
+    "background_transition": "none",
 }
 content = ""
 
 for idx, file in enumerate(files):
-    with open(os.path.join(directory, file), 'r') as f:
-        parts = f.read().split('---\n')
+    with open(os.path.join(directory, file), "r") as f:
+        parts = f.read().split("---\n")
 
     if idx == 0:
         config = {**config, **yaml.safe_load(parts[0])}
         parts = parts[1:]
 
-    section_content = '<section>'
+    section_content = "<section>"
 
     for slide in parts:
         for r in template_replace:
             slide = slide.replace(r[0], r[1])
 
         # parse config
-        slide_config = slide.split('\n')[0]
-        slide = '\n'.join(slide.split('\n')[1:])
-        if slide_config != '':
+        slide_config = slide.split("\n")[0]
+        slide = "\n".join(slide.split("\n")[1:])
+        if slide_config != "":
             slide_config = re.split(' (?=(?:[^"]|"[^"]*")*$)', slide_config)
-            slide_config = list(map(lambda x: x if re.match('^style=.*', x) else f'data-{x}', slide_config)) # data-
-            slide_config = ' ' + ' '.join(slide_config)
+            slide_config = list(
+                map(
+                    lambda x: x if re.match("^style=.*", x) else f"data-{x}",
+                    slide_config,
+                )
+            )  # data-
+            slide_config = " " + " ".join(slide_config)
 
-        slide_content = f'<section{slide_config}>'
+        slide_content = f"<section{slide_config}>"
         slide_content += commonmark(slide)
-        slide_content += '</section>'
+        slide_content += "</section>"
 
-        if slide_content != '<section></section>':
+        if slide_content != "<section></section>":
             section_content += slide_content
 
-    section_content += '</section>'
+    section_content += "</section>"
 
-    if section_content != '<section></section>':
+    if section_content != "<section></section>":
         content += section_content
 
-with open(os.path.join(directory, 'index.html'), 'w') as f:
-    f.write(template_env.get_template('index.html.j2').render(config, content=content))
-print(f'done')
+with open(os.path.join(directory, "index.html"), "w") as f:
+    f.write(template_env.get_template("index.html.j2").render(config, content=content))