chore: make repo bazel aware & add microgen macro (#181)

.gitignore

@@ -20,3 +20,6 @@ Session.vim
 
 # Temporary
 *~
+
+# Bazel directories
+bazel-*

BUILD

@@ -0,0 +1,4 @@
+load("@bazel_gazelle//:def.bzl", "gazelle")
+
+# gazelle:prefix github.com/googleapis/gapic-generator-go
+gazelle(name = "gazelle")

README.md

@@ -83,6 +83,49 @@ The configuration supported by the plugin option includes:
     * Defaults to empty, which is essentially the GA release level.
     * Acceptable values are `alpha` and `beta`.
 
+Bazel
+-----
+
+The generator can be executed via a Bazel BUILD file using the macro in this repo.
+
+Add the following to your WORKSPACE to import this project.
+
+```
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "com_googleapis_gapic_generator_go",
+    strip_prefix = "gapic-generator-master",
+    urls = ["https://github.com/googleapis/gapic-generator-go/archive/master.zip"],
+)
+
+load("@com_googleapis_gapic_generator_go//:repositories.bzl", "com_googleapis_gapic_generator_go_repositories")
+
+com_googleapis_gapic_generator_go_repositories()
+```
+
+_Note: do not use `master`, use a commit hash or a release tag._
+
+And invoke it in a BUILD file like so, using an example based on the [googleapis repo](https://github.com/googleapis/googleapis/tree/92bebf78345af8b2d3585220527115bda8bdedf8/google/cloud/language/v1).
+
+```
+load("@com_googleapis_gapic_generator_go//:rules_go_gapic/go_gapic.bzl", "go_gapic_library")
+
+go_gapic_library(
+  name = "language_go_gapic",
+  srcs = [
+    # BUILD target for proto_library
+    "//google/cloud/language/v1:language_proto",
+  ],
+  deps = [
+    # BUILD target for go_library_proto
+    "//google/cloud/language/v1:language_go_proto",
+  ],
+  # go-gapic-package parameter value
+  importpath = "cloud.google.com/go/language/apiv1;language",
+)
+```
+
 Docker Wrapper
 --------------
 The generator can also be executed via a Docker container. The image containes `protoc`, the microgenerator

WORKSPACE

@@ -0,0 +1,47 @@
+workspace(name = "com_googleapis_gapic_generator_go")
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "com_google_protobuf",
+    strip_prefix = "protobuf-3.9.1",
+    urls = ["https://github.com/protocolbuffers/protobuf/archive/v3.9.1.zip"],
+    sha256 = "c90d9e13564c0af85fd2912545ee47b57deded6e5a97de80395b6d2d9be64854",
+)
+
+load("@com_google_protobuf//:protobuf_deps.bzl", "protobuf_deps")
+
+protobuf_deps()
+
+http_archive(
+    name = "io_bazel_rules_go",
+    urls = [
+        "https://storage.googleapis.com/bazel-mirror/github.com/bazelbuild/rules_go/releases/download/v0.20.0/rules_go-v0.20.0.tar.gz",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.20.0/rules_go-v0.20.0.tar.gz",
+    ],
+    sha256 = "078f2a9569fa9ed846e60805fb5fb167d6f6c4ece48e6d409bf5fb2154eaf0d8",
+)
+
+load("@io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies", "go_register_toolchains")
+
+go_rules_dependencies()
+
+go_register_toolchains()
+
+http_archive(
+    name = "bazel_gazelle",
+    urls = [
+        "https://storage.googleapis.com/bazel-mirror/github.com/bazelbuild/bazel-gazelle/releases/download/0.18.2/bazel-gazelle-0.18.2.tar.gz",
+        "https://github.com/bazelbuild/bazel-gazelle/releases/download/0.18.2/bazel-gazelle-0.18.2.tar.gz",
+    ],
+    sha256 = "7fc87f4170011201b1690326e8c16c5d802836e3a0d617d8f75c3af2b23180c4",
+)
+
+# gazelle:repo bazel_gazelle
+load("@bazel_gazelle//:deps.bzl", "gazelle_dependencies")
+
+gazelle_dependencies()
+
+load("//:repositories.bzl", "com_googleapis_gapic_generator_go_repositories")
+
+com_googleapis_gapic_generator_go_repositories()

cmd/gen-go-sample/BUILD.bazel

@@ -0,0 +1,20 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/cmd/gen-go-sample",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//internal/errors:go_default_library",
+        "//internal/gensample:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+    ],
+)
+
+go_binary(
+    name = "gen-go-sample",
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)

cmd/protoc-gen-go_cli/BUILD.bazel

@@ -0,0 +1,20 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+# gazelle:proto disable_global
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/cmd/protoc-gen-go_cli",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//internal/gencli:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_golang_protobuf//protoc-gen-go/plugin:go_default_library",
+    ],
+)
+
+go_binary(
+    name = "protoc-gen-go_cli",
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)

cmd/protoc-gen-go_gapic/BUILD

@@ -0,0 +1,21 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+# gazelle:proto disable_global
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/cmd/protoc-gen-go_gapic",
+    visibility = ["//visibility:private"],
+    deps = [
+        "//internal/gengapic:go_default_library",
+        "//internal/gensample:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_golang_protobuf//protoc-gen-go/plugin:go_default_library",
+    ],
+)
+
+go_binary(
+    name = "protoc-gen-go_gapic",
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+)

internal/errors/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["errors.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/errors",
+    visibility = ["//:__subpackages__"],
+)

internal/gencli/BUILD.bazel

@@ -0,0 +1,44 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "cmd_file.go",
+        "completion_file.go",
+        "flag.go",
+        "gencli.go",
+        "root_file.go",
+        "service_file.go",
+        "util.go",
+    ],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/gencli",
+    visibility = ["//:__subpackages__"],
+    deps = [
+        "//internal/errors:go_default_library",
+        "//internal/pbinfo:go_default_library",
+        "//internal/printer:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_jhump_protoreflect//desc:go_default_library",
+        "@go_googleapis//google/api:annotations_go_proto",
+        "@io_bazel_rules_go//proto/wkt:compiler_plugin_go_proto",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "cmd_file_test.go",
+        "completion_file_test.go",
+        "flag_test.go",
+        "root_file_test.go",
+        "service_file_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    embed = [":go_default_library"],
+    deps = [
+        "//internal/pbinfo:go_default_library",
+        "//internal/txtdiff:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+    ],
+)

internal/gengapic/BUILD.bazel

@@ -0,0 +1,62 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "client_init.go",
+        "doc_file.go",
+        "example.go",
+        "gengapic.go",
+        "imports.go",
+        "lro.go",
+        "markdown.go",
+        "paging.go",
+        "service_config.go",
+        "stream.go",
+    ],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/gengapic",
+    visibility = ["//:__subpackages__"],
+    deps = [
+        "//internal/errors:go_default_library",
+        "//internal/grpc_service_config:go_default_library",
+        "//internal/license:go_default_library",
+        "//internal/pbinfo:go_default_library",
+        "//internal/printer:go_default_library",
+        "@com_github_golang_commonmark_markdown//:go_default_library",
+        "@com_github_golang_protobuf//jsonpb:go_default_library_gen",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@go_googleapis//google/api:annotations_go_proto",
+        "@go_googleapis//google/longrunning:longrunning_go_proto",
+        "@in_gopkg_yaml_v2//:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:compiler_plugin_go_proto",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+        "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "client_init_test.go",
+        "doc_file_test.go",
+        "example_test.go",
+        "gengapic_test.go",
+        "markdown_test.go",
+        "paging_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    embed = [":go_default_library"],
+    deps = [
+        "//internal/grpc_service_config:go_default_library",
+        "//internal/pbinfo:go_default_library",
+        "//internal/txtdiff:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_google_go_cmp//cmp:go_default_library",
+        "@go_googleapis//google/api:annotations_go_proto",
+        "@go_googleapis//google/longrunning:longrunning_go_proto",
+        "@go_googleapis//google/rpc:code_go_proto",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+        "@io_bazel_rules_go//proto/wkt:duration_go_proto",
+        "@io_bazel_rules_go//proto/wkt:wrappers_go_proto",
+    ],
+)

internal/gensample/BUILD.bazel

@@ -0,0 +1,56 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "bytes.go",
+        "enum.go",
+        "gapic.go",
+        "genmanifest.go",
+        "gensample.go",
+        "inittree.go",
+        "out.go",
+        "paging.go",
+        "plugin.go",
+        "primval.go",
+        "resource.go",
+        "sampmain.go",
+        "typing.go",
+    ],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/gensample",
+    visibility = ["//:__subpackages__"],
+    deps = [
+        "//internal/errors:go_default_library",
+        "//internal/gensample/schema_v1p2:go_default_library",
+        "//internal/license:go_default_library",
+        "//internal/pbinfo:go_default_library",
+        "//internal/printer:go_default_library",
+        "@in_gopkg_yaml_v2//:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:compiler_plugin_go_proto",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = [
+        "enum_test.go",
+        "genmanifest_test.go",
+        "gensample_sampleconfig_test.go",
+        "gensample_test.go",
+        "inittree_test.go",
+        "resource_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    embed = [":go_default_library"],
+    deps = [
+        "//internal/errors:go_default_library",
+        "//internal/gensample/schema_v1p2:go_default_library",
+        "//internal/pbinfo:go_default_library",
+        "//internal/txtdiff:go_default_library",
+        "@com_github_golang_protobuf//proto:go_default_library",
+        "@com_github_google_go_cmp//cmp:go_default_library",
+        "@in_gopkg_yaml_v2//:go_default_library",
+        "@io_bazel_rules_go//proto/wkt:descriptor_go_proto",
+    ],
+)

internal/gensample/schema_v1p2/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["schema.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/gensample/schema_v1p2",
+    visibility = ["//:__subpackages__"],
+)

internal/grpc_service_config/BUILD.bazel

@@ -0,0 +1,29 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+load("@io_bazel_rules_go//proto:def.bzl", "go_proto_library")
+
+proto_library(
+    name = "grpc_service_config_proto",
+    srcs = ["grpc_service_config.proto"],
+    visibility = ["//:__subpackages__"],
+    deps = [
+        "@com_google_protobuf//:duration_proto",
+        "@com_google_protobuf//:wrappers_proto",
+        "@go_googleapis//google/rpc:code_proto",
+    ],
+)
+
+go_proto_library(
+    name = "grpc_service_config_go_proto",
+    compilers = ["@io_bazel_rules_go//proto:go_grpc"],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/grpc_service_config",
+    proto = ":grpc_service_config_proto",
+    visibility = ["//:__subpackages__"],
+    deps = ["@go_googleapis//google/rpc:code_go_proto"],
+)
+
+go_library(
+    name = "go_default_library",
+    embed = [":grpc_service_config_go_proto"],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/grpc_service_config",
+    visibility = ["//visibility:public"],
+)

internal/license/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["license.go"],
+    importpath = "github.com/googleapis/gapic-generator-go/internal/license",
+    visibility = ["//:__subpackages__"],
+)