chore: migrate datastore synth.py to bazel (#82)

synth.py

@@ -20,7 +20,7 @@
 
 AUTOSYNTH_MULTIPLE_COMMITS = True
 
-gapic = gcp.GAPICGenerator()
+gapic = gcp.GAPICBazel()
 
 protobuf_header = "// Generated by the protocol buffer compiler.  DO NOT EDIT!"
 # License header
@@ -43,23 +43,25 @@
 
 service = 'datastore'
 versions = ['v1']
-config_pattern = '/google/datastore/artman_datastore.yaml'
 
 for version in versions:
   library = gapic.java_library(
       service=service,
       version=version,
-      config_path=config_pattern.format(version=version),
-      artman_output_name='')
+      bazel_target=f'//google/{service}/{version}:google-cloud-{service}-{version}-java',
+      proto_path=f'google/{service}/{version}',
+  )
+
+  library = library / f'google-cloud-{service}-{version}-java'
 
   s.replace(
-      library / f'proto-google-cloud-{service}-{version}/src/**/*.java',
+      library / f'proto-google-cloud-{service}-{version}-java/src/**/*.java',
       protobuf_header,
       f'{license_header}{protobuf_header}'
   )
 
   # Datastore only generates protos
-  s.copy(library / f'proto-google-cloud-{service}-{version}/src', f'proto-google-cloud-{service}-{version}/src')
+  s.copy(library / f'proto-google-cloud-{service}-{version}-java/src', f'proto-google-cloud-{service}-{version}/src')
 
   java.format_code('google-cloud-datastore/src')
   java.format_code(f'proto-google-cloud-{service}-{version}/src')