Fab automation (#2)

- Use KiKit for fab automation
- Add splitflap scripts for exporting pcb pdfs, and switch to splitflap script for 3d rendering (for consistency with fab automation)
- Added support in 3d rendering scripts for soldermask & silkscreen colors, option to skip virtual components
- Added silkscreen to base and screen pcbs for commit and date info

electronics/scripts/export_jlcpcb.py

@@ -0,0 +1,70 @@
+#!/usr/bin/env python3
+
+#   Copyright 2021 Scott Bezek and the splitflap contributors
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+import argparse
+import logging
+import os
+import subprocess
+import sys
+
+electronics_root = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+repo_root = os.path.dirname(electronics_root)
+sys.path.append(repo_root)
+
+from util import file_util
+from export_util import (
+    versioned_file,
+)
+
+logging.basicConfig(level=logging.DEBUG)
+logger = logging.getLogger(__name__)
+
+
+def export_jlcpcb(pcb, schematic, alt_fields):
+    pcb_file = os.path.abspath(pcb)
+
+    output_dir = os.path.join(electronics_root, 'build', os.path.splitext(os.path.basename(pcb_file))[0] + '-jlc')
+    file_util.mkdir_p(output_dir)
+
+    with versioned_file(pcb_file):
+        command = [
+            'kikit',
+            'fab',
+            'jlcpcb',
+        ]
+        if schematic is not None:
+            schematic_file = os.path.abspath(schematic)
+            command += [
+                '--assembly',
+                '--schematic',
+                schematic_file,
+                '--field',
+            ]
+            command.append(','.join(alt_fields + ['LCSC']))
+        command += [
+            pcb_file,
+            output_dir,
+        ]
+        subprocess.check_call(command)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('pcb')
+    parser.add_argument('--assembly-schematic')
+    parser.add_argument('--alt-fields', nargs='+')
+    args = parser.parse_args()
+    export_jlcpcb(args.pcb, args.assembly_schematic, args.alt_fields)