Add bootstrap target and update how tools are built (#13)

* Update tool installation method, add bootstrap target to makefile

* Address feedback

Makefile

@@ -5,6 +5,9 @@ THIS_FILE := $(lastword $(MAKEFILE_LIST))
 TMP_DIR := $(shell mktemp -d)
 REPO_PATH := github.com/hashicorp/watchtower
 
+bootstrap:
+	go generate -tags tools tools/tools.go
+
 ### oplog requires protoc-gen-go v1.20.0 or later
 # GO111MODULE=on go get -u github.com/golang/protobuf/protoc-gen-go@v1.40
 proto: protolint protobuild cleanup

tools/tools.go

@@ -1,22 +1,32 @@
 // +build tools
 
-// This file ensures tool dependencies are kept in sync.  This is the recommended way of doing this according to
+// This file ensures tool dependencies are kept in sync.  This is the
+// recommended way of doing this according to
 // https://github.com/golang/go/wiki/Modules#how-can-i-track-tool-dependencies-for-a-module
-// To update the versions used by this repo use:
-// $ go mod tidy
 // To install the following tools at the version used by this repo run:
-// $ go install (each of the dependencies listed below)
+// $ make bootstrap
+// or
+// $ go generate -tags tools tools/tools.go
 
 package tools
 
-import (
-	_ "github.com/bufbuild/buf/cmd/buf"
-	_ "github.com/favadi/protoc-go-inject-tag"
-	_ "github.com/go-swagger/go-swagger/cmd/swagger"
-	// use this instead of google.golang.org/protobuf/cmd/protoc-gen-go since this supports grpc plugin while the other does not.
-	// see https://github.com/golang/protobuf/releases#v1.4-generated-code and
-	// https://github.com/protocolbuffers/protobuf-go/releases/tag/v1.20.0#v1.20-grpc-support
-	_ "github.com/golang/protobuf/protoc-gen-go"
-	_ "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway"
-	_ "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger"
-)
+//go:generate go install github.com/bufbuild/buf/cmd/buf
+import _ "github.com/bufbuild/buf/cmd/buf"
+
+//go:generate go install github.com/go-swagger/go-swagger/cmd/swagger
+import _ "github.com/go-swagger/go-swagger/cmd/swagger"
+
+//go:generate go install github.com/favadi/protoc-go-inject-tag
+import _ "github.com/favadi/protoc-go-inject-tag"
+
+// use this instead of google.golang.org/protobuf/cmd/protoc-gen-go since this supports grpc plugin while the other does not.
+// see https://github.com/golang/protobuf/releases#v1.4-generated-code and
+// https://github.com/protocolbuffers/protobuf-go/releases/tag/v1.20.0#v1.20-grpc-support
+//go:generate go install github.com/golang/protobuf/protoc-gen-go
+import _ "github.com/golang/protobuf/protoc-gen-go"
+
+//go:generate go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
+import _ "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway"
+
+//go:generate go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
+import _ "github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger"