kustomize: automate github release publishing

An example release looks like:

https://github.com/droot/kubectl/releases/tag/v0.1.0

cmd/kustomize/build/.goreleaser.yml

@@ -0,0 +1,29 @@
+# This is an example goreleaser.yaml file with some sane defaults.
+# Make sure to check the documentation at http://goreleaser.com
+project_name: kustomize
+builds:
+- main: ./cmd/kustomize
+  binary: kustomize
+  ldflags: -s -X k8s.io/kubectl/cmd/kustomize/version.kustomizeVersion={{.Version}} -X k8s.io/kubectl/cmd/kustomize/version.gitCommit={{.Commit}} -X k8s.io/kubectl/cmd/kustomize/version.buildDate={{.Date}}
+  goos:
+  - darwin
+  - linux
+  - windows
+  env:
+  - CGO_ENABLED=0
+archive:
+  wrap_in_directory: true
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'
+release:
+  github:
+    owner: droot
+    name: kubectl

cmd/kustomize/build/build.sh

@@ -22,30 +22,21 @@ set -x
 # - Create the directory to host the code that matches the expected GOPATH package locations
 # - Use /go as the default GOPATH because this is what the image uses
 # - Link our current directory (containing the source code) to the package location in the GOPATH
+
 export PKG=k8s.io
 export REPO=kubectl
 export CMD=kustomize
 
-mkdir -p /go/src/$PKG
-ln -s $(pwd) /go/src/$PKG/$REPO
+GO_PKG_OWNER=$GOPATH/src/$PKG
+GO_PKG_PATH=$GO_PKG_OWNER/$REPO
 
-# Create the output directory for the binaries we will build
-# Make sure CGO is 0 so the binaries are statically compiled and linux which is necessary for cross compiling go
-export CGO=0
-export DEST=/workspace/_output/$CMD/bin
-mkdir -p $DEST || echo ""
+mkdir -p $GO_PKG_OWNER
+ln -s $(pwd) $GO_PKG_PATH
 
-go build -o $DEST/$CMD $PKG/$REPO/cmd/$CMD
+# When invoked in container builder, this script runs under /workspace which is
+# not under $GOPATH, so we need to `cd` to repo under GOPATH for it to build
+cd $GO_PKG_PATH
 
-# Explicitly set the values of the variables in package "X" using ldflag so that they are statically compiled into
-# the "version" command
-export GITCOMMIT=$(git rev-parse HEAD)
-export BUILDDATE=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
-export X=$PKG/$REPO/cmd/$CMD/version
-go build -o $DEST/$CMD \
- -ldflags "-X $X.kustomizeVersion=$TAG -X $X.goos=$GOOS -X $X.goarch=$GOARCH -X $X.gitCommit=$GITCOMMIT -X $X.buildDate=$BUILDDATE" \
-	$PKG/$REPO/cmd/$CMD
-
-# Generate the tar archive
-cd /workspace/_output/
-tar -czvf /workspace/$CMD-$VERSION-$GOOS-$GOARCH.tar.gz $CMD
+/goreleaser release --config=cmd/$CMD/build/.goreleaser.yml --debug --rm-dist
+# --skip-validate
+# --snapshot --skip-publish

cmd/kustomize/build/cloudbuild.yaml

@@ -16,15 +16,10 @@
 steps:
 - name: "ubuntu"
   args: ["mkdir", "-p", "/workspace/_output"]
-- name: "golang:1.10-stretch"
+- name: "gcr.io/kustomize-199618/golang_with_goreleaser:1.10-stretch"
   args: ["bash", "cmd/kustomize/build/build.sh"]
-  env:
-  - 'GOOS=${_GOOS}'
-  - 'GOARCH=${_GOARCH}'
-  - 'VERSION=${TAG_NAME}'
-- name: 'gcr.io/cloud-builders/gsutil'
-  args: ['-h', 'Content-Type:application/gzip', 'cp', '-a', 'public-read', 'kustomize-${TAG_NAME}-${_GOOS}-${_GOARCH}.tar.gz', 'gs://kustomize-release/kustomize-${TAG_NAME}-${_GOOS}-${_GOARCH}.tar.gz']
-  env:
-  - 'GOOS=${_GOOS}'
-  - 'GOARCH=${_GOARCH}'
-  - 'VERSION=${TAG_NAME}'
+  secretEnv: ['GITHUB_TOKEN']
+secrets:
+- kmsKeyName: projects/kustomize-199618/locations/global/keyRings/github-tokens/cryptoKeys/gh-release-token
+  secretEnv:
+   GITHUB_TOKEN: CiQAyrREbPgXJOeT7M3t+WlxkhXwlMPudixBeiyWTjmLOMLqdK4SUQA0W+xUmDJKAhyfHCcwqSEzUn9OwKC7XAYcmwe0CCKTCbPbDgmioDK24q3LVapndXNvnnHvCjhOJNEr1o+P1DCF+LlzYV2YL8lP09rrKrslPg==

cmd/kustomize/build/cloudbuild_local.yaml

@@ -23,9 +23,10 @@
 steps:
 - name: "ubuntu"
   args: ["mkdir", "-p", "/workspace/_output"]
-- name: "golang:1.10-stretch"
+- name: "gcr.io/kustomize-199618/golang_with_goreleaser:1.10-stretch"
   args: ["bash", "cmd/kustomize/build/build.sh"]
-  env:
-  - 'GOOS=${_GOOS}'
-  - 'GOARCH=${_GOARCH}'
-  - 'VERSION=${TAG_NAME}'
+  secretEnv: ['GITHUB_TOKEN']
+secrets:
+- kmsKeyName: projects/kustomize-199618/locations/global/keyRings/github-tokens/cryptoKeys/gh-release-token
+  secretEnv:
+   GITHUB_TOKEN: CiQAyrREbPgXJOeT7M3t+WlxkhXwlMPudixBeiyWTjmLOMLqdK4SUQA0W+xUmDJKAhyfHCcwqSEzUn9OwKC7XAYcmwe0CCKTCbPbDgmioDK24q3LVapndXNvnnHvCjhOJNEr1o+P1DCF+LlzYV2YL8lP09rrKrslPg==