Makefile/docs: Lock in 1.6 req, doc vendored deps

* Drop Go 1.5 compatibility env vars
 * Drop `make updatedeps` from `Makefile` and docs
 * Update README w/ vendored dep instructions

BUILDING.md

@@ -41,15 +41,12 @@ vagrant ssh
 # The current "terraform" directory is then sync'd into the gopath
 cd /opt/gopath/src/github.com/hashicorp/terraform/
 
-# Fetch dependencies
-make updatedeps
-
 # Verify unit tests pass
 make test
 
 # Build the release
 # This generates binaries for each platform and places them in the pkg folder
-make release
+make bin
 ```
 
 After running these commands, you should have binaries for all supported

Makefile

@@ -1,4 +1,4 @@
-TEST?=$$(GO15VENDOREXPERIMENT=1 go list ./... | grep -v /vendor/)
+TEST?=$$(go list ./... | grep -v /vendor/)
 VETARGS?=-all
 
 default: test vet
@@ -19,7 +19,7 @@ quickdev: generate
 # changes will require a rebuild of everything, in which case the dev
 # target should be used.
 core-dev: fmtcheck generate
-	GO15VENDOREXPERIMENT=1 go install github.com/hashicorp/terraform
+	go install github.com/hashicorp/terraform
 
 # Shorthand for quickly testing the core of Terraform (i.e. "not providers")
 core-test: generate
@@ -28,12 +28,12 @@ core-test: generate
 # Shorthand for building and installing just one plugin for local testing.
 # Run as (for example): make plugin-dev PLUGIN=provider-aws
 plugin-dev: fmtcheck generate
-	GO15VENDOREXPERIMENT=1 go install github.com/hashicorp/terraform/builtin/bins/$(PLUGIN)
+	go install github.com/hashicorp/terraform/builtin/bins/$(PLUGIN)
 	mv $(GOPATH)/bin/$(PLUGIN) $(GOPATH)/bin/terraform-$(PLUGIN)
 
 # test runs the unit tests
 test: fmtcheck generate
-	TF_ACC= GO15VENDOREXPERIMENT=1 go test $(TEST) $(TESTARGS) -timeout=30s -parallel=4
+	TF_ACC= go test $(TEST) $(TESTARGS) -timeout=30s -parallel=4
 
 # testacc runs acceptance tests
 testacc: fmtcheck generate
@@ -42,30 +42,18 @@ testacc: fmtcheck generate
 		echo "  make testacc TEST=./builtin/providers/aws"; \
 		exit 1; \
 	fi
-	TF_ACC=1 GO15VENDOREXPERIMENT=1 go test $(TEST) -v $(TESTARGS) -timeout 120m
+	TF_ACC=1 go test $(TEST) -v $(TESTARGS) -timeout 120m
 
 # testrace runs the race checker
 testrace: fmtcheck generate
-	TF_ACC= GO15VENDOREXPERIMENT=1 go test -race $(TEST) $(TESTARGS)
-
-# updatedeps installs all the dependencies that Terraform needs to run
-# and build.
-updatedeps:
-	go get -u github.com/mitchellh/gox
-	go get -u golang.org/x/tools/cmd/stringer
-	go list ./... \
-		| xargs go list -f '{{join .Deps "\n"}}' \
-		| grep -v github.com/hashicorp/terraform \
-		| grep -v '/internal/' \
-		| sort -u \
-		| xargs go get -f -u -v
+	TF_ACC= go test -race $(TEST) $(TESTARGS)
 
 cover:
 	@go tool cover 2>/dev/null; if [ $$? -eq 3 ]; then \
 		go get -u golang.org/x/tools/cmd/cover; \
 	fi
-	GO15VENDOREXPERIMENT=1 go test $(TEST) -coverprofile=coverage.out
-	GO15VENDOREXPERIMENT=1 go tool cover -html=coverage.out
+	go test $(TEST) -coverprofile=coverage.out
+	go tool cover -html=coverage.out
 	rm coverage.out
 
 # vet runs the Go source code static analysis tool `vet` to find
@@ -75,7 +63,7 @@ vet:
 		go get golang.org/x/tools/cmd/vet; \
 	fi
 	@echo "go tool vet $(VETARGS) ."
-	@GO15VENDOREXPERIMENT=1 go tool vet $(VETARGS) $$(ls -d */ | grep -v vendor) ; if [ $$? -eq 1 ]; then \
+	@go tool vet $(VETARGS) $$(ls -d */ | grep -v vendor) ; if [ $$? -eq 1 ]; then \
 		echo ""; \
 		echo "Vet found suspicious constructs. Please check the reported constructs"; \
 		echo "and fix them if necessary before submitting the code for review."; \
@@ -88,7 +76,7 @@ generate:
 	@which stringer ; if [ $$? -ne 0 ]; then \
 	  go get -u golang.org/x/tools/cmd/stringer; \
 	fi
-	GO15VENDOREXPERIMENT=1 go generate $$(GO15VENDOREXPERIMENT=1 go list ./... | grep -v /vendor/)
+	go generate $$(go list ./... | grep -v /vendor/)
 
 fmt:
 	gofmt -w .

README.md

@@ -33,10 +33,7 @@ If you wish to work on Terraform itself or any of its built-in providers, you'll
 
 For local dev first make sure Go is properly installed, including setting up a [GOPATH](http://golang.org/doc/code.html#GOPATH). You will also need to add `$GOPATH/bin` to your `$PATH`. Next, install the following software packages, which are needed for some dependencies:
 
-- [Git](http://git-scm.com/)
-- [Mercurial](http://mercurial.selenic.com/)
-
-Next, clone this repository into `$GOPATH/src/github.com/hashicorp/terraform` and run `make`. This will compile dependencies and run the tests. If this exits with exit status 0, then everything is working!
+Next, using [Git](https://git-scm.com/), clone this repository into `$GOPATH/src/github.com/hashicorp/terraform`. All the necessary dependencies are either vendored or automatically installed, so you just need to type `make`. This will compile the code and then run the tests. If this exits with exit status 0, then everything is working!
 
 ```sh
 $ make
@@ -70,6 +67,61 @@ If you're working on the core of Terraform, and only wish to rebuild that withou
 $ make core-dev
 ```
 
+### Dependencies
+
+Terraform stores its dependencies under `vendor/`, which [Go 1.6+ will automatically recognize and load](https://golang.org/cmd/go/#hdr-Vendor_Directories). We use [`godep`](https://github.com/tools/godep) to manage the vendored dependencies.
+
+If you're developing Terraform, there are a few tasks you might need to perform.
+
+#### Adding a dependency
+
+If you're adding a dependency. You'll need to vendor it in the same Pull Request as the code that depends on it. You should do this in a separate commit from your code, as makes PR review easier and Git history simpler to read in the future.
+
+Because godep captures new dependencies from the local `$GOPATH`, you first need to `godep restore` from the master branch to ensure that the only diff is your new dependency.
+
+Assuming your work is on a branch called `my-feature-branch`, the steps look like this:
+
+```bash
+# Get latest master branch's dependencies staged in local $GOPATH
+git checkout master
+git pull
+godep restore -v # flag is optional, enables verbose output
+
+# Capture the new dependency referenced from my-feature-branch
+git checkout my-feature-branch
+git rebase master
+godep save ./...
+
+# There should now be a diff in `vendor/` with added files for your dependency,
+# and a diff in Godeps/Godeps.json with metadata for your dependency.
+
+# Make a commit with your new dependencies added
+git add -A
+git commit -m "vendor: Capture new dependency upstream-pkg"
+
+# Push to your branch (may need -f if you rebased)
+git push origin my-feature-branch
+```
+
+#### Updating a dependency
+
+If you're updating an existing dependency, godep provides a specific command to snag the newer version from your `$GOPATH`.
+
+```bash
+# Update the dependncy to the version currently in your $GOPATH
+godep update github.com/some/dependency/...
+
+# There should now be a diff in `vendor/` with changed files for your dependency,
+# and a diff in Godeps/Godeps.json with metadata for the updated dependency.
+
+# Make a commit with the updated dependency
+git add -A
+git commit -m "vendor: Update dependency upstream-pkg to 1.4.6"
+
+# Push to your branch
+git push origin my-feature-branch
+```
+
 ### Acceptance Tests
 
 Terraform also has a comprehensive [acceptance test](http://en.wikipedia.org/wiki/Acceptance_testing) suite covering most of the major features of the built-in providers.

scripts/build.sh

@@ -18,16 +18,12 @@ GIT_DIRTY=$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)
 XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
 XC_OS=${XC_OS:-linux darwin windows freebsd openbsd solaris}
 
-# Use vendored dependencies
-export GO15VENDOREXPERIMENT=1
-
 # Delete the old dir
 echo "==> Removing old directory..."
 rm -f bin/*
 rm -rf pkg/*
 mkdir -p bin/
 
-
 # If its dev mode, only build for ourself
 if [ "${TF_DEV}x" != "x" ]; then
     XC_OS=$(go env GOOS)