add test-dependencies noting

README.md

@@ -65,6 +65,7 @@ Usage:
 
 - `--dry` will only print the changes to happen, not write them to file
 - `--quiet` will only print the final statement
+- `--note` will add a `test-dependencies` field to the second file. Useful for tooling
 
 ```bash
 python elm_deps_sync.py elm-package.json spec/elm/elm-package.json

elm_deps_sync.py

@@ -6,7 +6,7 @@
 import argparse
 
 
-def sync_versions(top_level_file, spec_file, quiet=False, dry=False):
+def sync_versions(top_level_file, spec_file, quiet=False, dry=False, note_test_deps=True):
     """ first file should be the top level elm-package.json
         second file should be the spec file
     """
@@ -34,7 +34,16 @@ def sync_versions(top_level_file, spec_file, quiet=False, dry=False):
                     other_package_version=spec['dependencies'][package_name])
                 )
 
-    if len(messages) > 0:
+    test_deps = {}
+
+    for (package_name, package_version) in spec['dependencies'].items():
+        if package_name not in top_level['dependencies']:
+            test_deps[package_name] = package_version
+
+    if note_test_deps:
+        spec['test-dependencies'] = test_deps
+
+    if len(messages) > 0 or note_test_deps:
         print('{number} packages changed.'.format(number=len(messages)))
 
         if not dry:
@@ -55,13 +64,18 @@ def main():
 
     parser.add_argument('--quiet', '-q', action='store_true', help='don\'t print anything', default=False)
     parser.add_argument('--dry', '-d', action='store_true', help='only print possible changes', default=False)
+    parser.add_argument('--note',
+        action='store_true',
+        help='add a test-dependencies field of things only found in the test',
+        default=False
+    )
 
 
     parser.add_argument('top_level_file')
     parser.add_argument('spec_file')
     args = parser.parse_args()
 
-    sync_versions(args.top_level_file, args.spec_file, quiet=args.quiet, dry=args.dry)
+    sync_versions(args.top_level_file, args.spec_file, quiet=args.quiet, dry=args.dry, note_test_deps=args.note)
 
 
 if __name__ == '__main__':