Add devcontainer.json (#1687) (#1691)

Adds support for VS Code dev containers, which allows using the
build environment in VS Code and Github Codespaces.

See https://code.visualstudio.com/docs/remote/containers and
https://github.com/features/codespaces for more information.

.bazelversion

@@ -0,0 +1 @@
+3.5.0

.circleci/Dockerfile

@@ -28,6 +28,10 @@ ENV NODE_VERSION=v10.16.3
 ENV NVM_VERSION=v0.35.0
 RUN wget -qO- https://raw.githubusercontent.com/creationix/nvm/${NVM_VERSION}/install.sh | bash
 
+# Install Bazelisk as bazel to manage Bazel
+RUN go get github.com/bazelbuild/bazelisk && \
+    mv $(which bazelisk) /usr/local/bin/bazel
+
 # Clean up
 RUN apt-get autoremove -y && \
     apt-get remove -y wget \

.circleci/config.yml

@@ -95,8 +95,7 @@ jobs:
       - setup_remote_docker
       - run: ./fuzzit.sh
   bazel:
-    docker:
-      - image: l.gcr.io/google/bazel:latest
+    executor: build-env
     working_directory: /src/grpc-gateway
     steps:
       - checkout
@@ -141,8 +140,7 @@ jobs:
       - run: go mod vendor
       - run: curl -sL https://git.io/goreleaser | bash
   update-repositoriesbzl:
-    docker:
-      - image: l.gcr.io/google/bazel:latest
+    executor: build-env
     working_directory: /src/grpc-gateway
     steps:
       - checkout

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+{
+	"dockerFile": "../.circleci/Dockerfile",
+	"overrideCommand": true,
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"editor.formatOnSave": true,
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.useGoProxyToCheckForToolUpdates": true,
+		"go.useLanguageServer": true,
+		"go.gopath": "/go",
+		"go.goroot": "/usr/local/go",
+		"go.toolsGopath": "/go/bin",
+		"bazel.buildifierExecutable": "/go/bin/buildifier",
+		"bazel.buildifierFixOnFormat": true,
+		"bazel.enableCodeLens": true,
+	},
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"golang.Go",
+		"bazelbuild.vscode-bazel",
+	],
+	"postCreateCommand": "cd $(mktemp -d) && GO111MODULE=on go get golang.org/x/tools/gopls@latest github.com/bazelbuild/buildtools/buildifier@latest && cd -",
+}

CONTRIBUTING.md

@@ -22,7 +22,9 @@ All submissions, including submissions by project members, require review.
 
 ### I want to regenerate the files after making changes
 
-Great! It should be as simple as this (run from the root of the directory):
+#### Using Docker
+
+It should be as simple as this (run from the root of the repository):
 
 ```bash
 docker run -v $(pwd):/src/grpc-gateway --rm docker.pkg.github.com/grpc-ecosystem/grpc-gateway/build-env:1.15 \
@@ -40,6 +42,25 @@ docker run -itv $(pwd):/grpc-gateway -w /grpc-gateway --entrypoint /bin/bash --r
 You may need to authenticate with GitHub to pull `docker.pkg.github.com/grpc-ecosystem/grpc-gateway/build-env`.
 You can do this by following the steps on the [GitHub Package docs](https://help.github.com/en/packages/using-github-packages-with-your-projects-ecosystem/configuring-docker-for-use-with-github-packages#authenticating-to-github-packages).
 
+#### Using Visual Studio Code dev containers
+
+This repo contains a `devcontainer.json` configuration that sets up the build environment in a container using
+[VS Code dev containers](https://code.visualstudio.com/docs/remote/containers). If you're using the dev container,
+you can run the commands directly in your terminal:
+
+```shell
+$ make realclean && make examples && make testproto
+```
+
+```shell
+$ bazel run :gazelle -- update-repos -from_file=go.mod -to_macro=repositories.bzl%go_repositories && \
+    bazel run :gazelle && \
+    bazel run :buildifier
+```
+
+Note that the above listed docker commands will not work in the dev container, since volume mounts from
+nested docker container are not possible.
+
 If this has resulted in some file changes in the repo, please ensure you check those in with your merge request.
 
 ### Making a release

Makefile

@@ -176,9 +176,7 @@ $(SWAGGER_PLUGIN): $(SWAGGER_PLUGIN_SRC) $(OPENAPIV2_GO)
 $(EXAMPLE_SVCSRCS): $(GO_PLUGIN) $(EXAMPLES)
 	protoc -I $(PROTOC_INC_PATH) -I. -I$(GOOGLEAPIS_DIR) --plugin=$(GO_PLUGIN) --go_out=$(PKGMAP),plugins=grpc,paths=source_relative:. $(EXAMPLES)
 $(EXAMPLE_DEPSRCS): $(GO_PLUGIN) $(EXAMPLE_DEPS)
-	mkdir -p $(OUTPUT_DIR)
-	protoc -I $(PROTOC_INC_PATH) -I. --plugin=$(GO_PLUGIN) --go_out=$(PKGMAP),plugins=grpc,paths=source_relative:$(OUTPUT_DIR) $(@:.pb.go=.proto)
-	cp $(OUTPUT_DIR)/$@ $@ || cp $(OUTPUT_DIR)/$@ $@
+	protoc -I $(PROTOC_INC_PATH) -I. --plugin=$(GO_PLUGIN) --go_out=$(PKGMAP),plugins=grpc,paths=source_relative:. $(@:.pb.go=.proto)
 
 $(RUNTIME_TEST_SRCS): $(GO_PLUGIN) $(RUNTIME_TEST_PROTO)
 	protoc -I $(PROTOC_INC_PATH) -I. -I$(GOOGLEAPIS_DIR) --plugin=$(GO_PLUGIN) --go_out=$(PKGMAP),plugins=grpc,paths=source_relative:. $(RUNTIME_TEST_PROTO)

WORKSPACE

@@ -31,8 +31,6 @@ rules_proto_dependencies()
 
 rules_proto_toolchains()
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-
 http_archive(
     name = "io_bazel_rules_go",
     sha256 = "7b9bbe3ea1fccb46dcfa6c3f3e29ba7ec740d8733370e21cdc8937467b4a4349",