Add a `qmk format-json` command that will format JSON files (#12372)

* Add a command to format json files

* change to work after rebase

* add test for qmk format-json

* add documentation for qmk format-json

* Update lib/python/qmk/cli/format/json.py

2 files changed, 67 insertions, 0 deletions

diff --git a/lib/python/qmk/cli/format/__init__.py b/lib/python/qmk/cli/format/__init__.py
new file mode 100644
index 0000000000..741ec778b1
--- /dev/null
+++ b/lib/python/qmk/cli/format/__init__.py
@@ -0,0 +1 @@
+from . import json
diff --git a/lib/python/qmk/cli/format/json.py b/lib/python/qmk/cli/format/json.py
new file mode 100755
index 0000000000..1358c70e7a
--- /dev/null
+++ b/lib/python/qmk/cli/format/json.py
@@ -0,0 +1,66 @@
+"""JSON Formatting Script
+
+Spits out a JSON file formatted with one of QMK's formatters.
+"""
+import json
+
+from jsonschema import ValidationError
+from milc import cli
+
+from qmk.info import info_json
+from qmk.json_schema import json_load, keyboard_validate
+from qmk.json_encoders import InfoJSONEncoder, KeymapJSONEncoder
+from qmk.path import normpath
+
+
+@cli.argument('json_file', arg_only=True, type=normpath, help='JSON file to format')
+@cli.argument('-f', '--format', choices=['auto', 'keyboard', 'keymap'], default='auto', arg_only=True, help='JSON formatter to use (Default: autodetect)')
+@cli.subcommand('Generate an info.json file for a keyboard.', hidden=False if cli.config.user.developer else True)
+def format_json(cli):
+    """Format a json file.
+    """
+    json_file = json_load(cli.args.json_file)
+
+    if cli.args.format == 'auto':
+        try:
+            keyboard_validate(json_file)
+            json_encoder = InfoJSONEncoder
+
+        except ValidationError as e:
+            cli.log.warning('File %s did not validate as a keyboard:\n\t%s', cli.args.json_file, e)
+            cli.log.info('Treating %s as a keymap file.', cli.args.json_file)
+            json_encoder = KeymapJSONEncoder
+
+    elif cli.args.format == 'keyboard':
+        json_encoder = InfoJSONEncoder
+    elif cli.args.format == 'keymap':
+        json_encoder = KeymapJSONEncoder
+    else:
+        # This should be impossible
+        cli.log.error('Unknown format: %s', cli.args.format)
+        return False
+
+    if json_encoder == KeymapJSONEncoder and 'layout' in json_file:
+        # Attempt to format the keycodes.
+        layout = json_file['layout']
+        info_data = info_json(json_file['keyboard'])
+
+        if layout in info_data.get('layout_aliases', {}):
+            layout = json_file['layout'] = info_data['layout_aliases'][layout]
+
+        if layout in info_data.get('layouts'):
+            for layer_num, layer in enumerate(json_file['layers']):
+                current_layer = []
+                last_row = 0
+
+                for keymap_key, info_key in zip(layer, info_data['layouts'][layout]['layout']):
+                    if last_row != info_key['y']:
+                        current_layer.append('JSON_NEWLINE')
+                        last_row = info_key['y']
+
+                    current_layer.append(keymap_key)
+
+                json_file['layers'][layer_num] = current_layer
+
+    # Display the results
+    print(json.dumps(json_file, cls=json_encoder))