Replace prototool with buf (#847)

* Replace prototool with buf

* Remove dep tooling references

* Update protoc and buf versions

* Add CI test to ensure files are consistently generated

* Update Go version to 1.16

* Remove dependencies added by tool installs in CI

* Update module file

Author: johanbrandhorst

.circleci/config.yml

@@ -3,12 +3,13 @@ version: 2.1
 executors:
   test-executor:
     docker:
-      - image: circleci/golang:1.15.2
+      - image: circleci/golang:1.16.2
         auth:
           username: mydockerhub-user
           password: $DOCKERHUB_PASSWORD
     environment:
-      PROTOTOOL_VER: 1.10.0
+      BUF_VER: 0.40.0
+      PROTOC_VER: 3.15.6
     working_directory: /go/src/github.com/improbable-eng/grpc-web
 
 jobs:
@@ -23,10 +24,12 @@ jobs:
     steps:
       - checkout
       - run: sudo apt-get install unzip
-      - run: . ./install-prototool.sh
+      - run: . ./install-buf.sh
+      - run: . ./install-protoc.sh
       - run: echo 'export GOBIN=/go/bin' >> $BASH_ENV
       - run: go get golang.org/x/tools/cmd/goimports
       - run: go get github.com/robertkrimen/godocdown/godocdown
+      - run: go mod tidy # removes dependencies added by tool installations
       - run: go install github.com/golang/protobuf/protoc-gen-go
       - run:
           command: |
@@ -38,6 +41,8 @@ jobs:
             echo 'export NVM_DIR=$HOME/.nvm' >> $BASH_ENV
             echo 'source $NVM_DIR/nvm.sh' >> $BASH_ENV
       - run: npm install
+      # Verify test files are correctly generated
+      - run: cd integration_test && npm run build:proto && git diff --exit-code
       # Lint
       - run: ./lint-all.sh
       # Unit Tests

CONTRIBUTING.md

@@ -1,6 +1,5 @@
 ## Developer Tool Prerequisites
 * [go](https://golang.org/doc/install) - The Go programming language
-* [dep](https://golang.github.io/dep/docs/installation.html) - Go dependency manager
 * [nvm](https://github.com/creationix/nvm#installation) - Node Version Manager (for installing NodeJS and NPM)
 
 ## Performing a Fresh Checkout
@@ -19,7 +18,7 @@ nvm use
 npm install
 ```
 
-Note you will also need to [install prototool](https://github.com/uber/prototool/blob/dev/docs/install.md) and add it to your `PATH` environment variable if you wish to re-generate the integration test proto files.
+Note you will also need to [install buf](https://github.com/bufbuild/buf) and add it to your `PATH` environment variable if you wish to re-generate the integration test proto files.
 
 ## Testing Prerequisites
 Before you run the tests for the first time, please follow these steps: