1 files changed, 56 insertions, 0 deletions
diff --git a/lib/python/qmk/cli/json2c.py b/lib/python/qmk/cli/json2c.py
new file mode 100755
index 0000000000..9abf03d8a1
--- /dev/null
+++ b/lib/python/qmk/cli/json2c.py
@@ -0,0 +1,56 @@
+"""Generate a keymap.c from a configurator export.
+"""
+import json
+from pathlib import Path
+
+from milc import cli
+
+import qmk.keymap
+import qmk.path
+
+
+@cli.argument('-o', '--output', arg_only=True, type=Path, help='File to write to')
+@cli.argument('-q', '--quiet', arg_only=True, action='store_true', help="Quiet mode, only output error messages")
+@cli.argument('filename', arg_only=True, help='Configurator JSON file')
+@cli.subcommand('Creates a keymap.c from a QMK Configurator export.')
+def json2c(cli):
+    """Generate a keymap.c from a configurator export.
+
+    This command uses the `qmk.keymap` module to generate a keymap.c from a configurator export. The generated keymap is written to stdout, or to a file if -o is provided.
+    """
+    cli.args.filename = qmk.path.normpath(cli.args.filename)
+
+    # Error checking
+    if not cli.args.filename.exists():
+        cli.log.error('JSON file does not exist!')
+        cli.print_usage()
+        exit(1)
+
+    if str(cli.args.filename) == '-':
+        # TODO(skullydazed/anyone): Read file contents from STDIN
+        cli.log.error('Reading from STDIN is not (yet) supported.')
+        cli.print_usage()
+        exit(1)
+
+    # Environment processing
+    if cli.args.output == ('-'):
+        cli.args.output = None
+
+    # Parse the configurator json
+    with cli.args.filename.open('r') as fd:
+        user_keymap = json.load(fd)
+
+    # Generate the keymap
+    keymap_c = qmk.keymap.generate(user_keymap['keyboard'], user_keymap['layout'], user_keymap['layers'])
+
+    if cli.args.output:
+        cli.args.output.parent.mkdir(parents=True, exist_ok=True)
+        if cli.args.output.exists():
+            cli.args.output.replace(cli.args.output.name + '.bak')
+        cli.args.output.write_text(keymap_c)
+
+        if not cli.args.quiet:
+            cli.log.info('Wrote keymap to %s.', cli.args.output)
+
+    else:
+        print(keymap_c)