`qmk docs`: Run `docsify serve` if available (#15056)

docs/cli_commands.md

@@ -373,6 +373,8 @@ qmk format-c -b branch_name
 This command starts a local HTTP server which you can use for browsing or improving the docs. Default port is 8936.
 Use the `-b`/`--browser` flag to automatically open the local webserver in your default browser.
 
+This command runs `docsify serve` if `docsify-cli` is installed (which provides live reload), otherwise Python's builtin HTTP server module will be used.
+
 **Usage**:
 
 ```

lib/python/qmk/cli/docs.py

@@ -2,6 +2,7 @@
 """
 import http.server
 import os
+import shutil
 import webbrowser
 
 from milc import cli
@@ -11,10 +12,23 @@ from milc import cli
 @cli.argument('-b', '--browser', action='store_true', help='Open the docs in the default browser.')
 @cli.subcommand('Run a local webserver for QMK documentation.', hidden=False if cli.config.user.developer else True)
 def docs(cli):
-    """Spin up a local HTTPServer instance for the QMK docs.
+    """Spin up a local HTTP server for the QMK docs.
     """
     os.chdir('docs')
 
+    # If docsify-cli is installed, run that instead so we get live reload
+    if shutil.which('docsify'):
+        command = ['docsify', 'serve', '--port', f'{cli.config.docs.port}', '--open' if cli.config.docs.browser else '']
+
+        cli.log.info(f"Running {{fg_cyan}}{str.join(' ', command)}{{fg_reset}}")
+        cli.log.info("Press Control+C to exit.")
+
+        try:
+            cli.run(command, capture_output=False)
+        except KeyboardInterrupt:
+            cli.log.info("Stopping HTTP server...")
+    else:
+        # Fall back to Python HTTPServer
         with http.server.HTTPServer(('', cli.config.docs.port), http.server.SimpleHTTPRequestHandler) as httpd:
             cli.log.info(f"Serving QMK docs at http://localhost:{cli.config.docs.port}/")
             cli.log.info("Press Control+C to exit.")