ci: preliminary CD with goreleaser (#3173)

* chore: ci: preliminary CD support

* chore: ci: split release process into its own workflow

* chore: ci: cleanup the ci.yml and .goreleaser.yml

* chore: ci: unshallowify the clone before searching for the closes tag

* chore: tidy up goreleaser config & the release githubaction

* chore: add --no-tty to gpg args

* chore: more gpg args

* chore: try with default gpg args by goreleaser

* chore: gpg...

* chore: set GPG_TTY

* chore: preset gpg conf

* Apply suggestions from code review

chore: tidy up the .goreleaser.yml

Co-Authored-By: Dave Henderson <dhenderson@gmail.com>

* chore: gpg debugging

* chore: set and export the tty for gpg

* chore: gpg..

* chore: use the exact same line from goreleaser-action README for singing

* chore: remove signing stanzas from ymls

* chore: clean up the release action for final submission

* quote the arguments of echo

Co-Authored-By: Francis Lavoie <lavofr@gmail.com>

Co-authored-by: Dave Henderson <dhenderson@gmail.com>
Co-authored-by: Francis Lavoie <lavofr@gmail.com>

.github/workflows/release.yml

@@ -0,0 +1,53 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  release:
+    name: Release
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        go-version: [ 1.14.x ]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v1
+      with:
+        go-version: ${{ matrix.go-version }}
+
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    # So GoReleaser can generate the changelog properly
+    - name: Unshallowify the repo clone
+      run: git fetch --prune --unshallow
+
+    - name: Print Go version and environment
+      id: vars
+      run: |
+        printf "Using go at: $(which go)\n"
+        printf "Go version: $(go version)\n"
+        printf "\n\nGo environment:\n\n"
+        go env
+        printf "\n\nSystem environment:\n\n"
+        env
+    
+    # https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
+    - name: Get the version
+      id: get_version
+      run: echo "::set-output name=version_tag::${GITHUB_REF/refs\/tags\//}"
+
+    # GoReleaser will take care of publishing those artifacts into the release
+    - name: Run GoReleaser
+      uses: goreleaser/goreleaser-action@v1
+      with:
+        version: latest
+        args: release --rm-dist
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        TAG: ${{ steps.vars.outputs.version_tag }}

.gitignore

@@ -16,3 +16,8 @@ cmd/caddy/caddy.exe
 
 # go modules
 vendor
+
+# goreleaser artifacts
+dist
+caddy-build
+caddy-dist

.goreleaser.yml

@@ -0,0 +1,66 @@
+before:
+  hooks:
+    - mkdir -p caddy-build
+    - cp cmd/caddy/main.go caddy-build/main.go
+    - cp ./go.mod caddy-build/go.mod
+    - sed -i.bkp s/github.com\/caddyserver\/caddy\/v2/caddy/g ./caddy-build/go.mod
+    # GoReleaser doesn't seem to offer {{.Tag}} at this stage, so we have to embed it into the env
+    # so we run: TAG=$(git describe --abbrev=0) goreleaser release --rm-dist --skip-publish --skip-validate
+    - go mod edit -require=github.com/caddyserver/caddy/v2@{{.Env.TAG}} ./caddy-build/go.mod
+    - git clone --depth 1 https://github.com/caddyserver/dist caddy-dist
+    - go mod download
+builds:
+- env:
+  - CGO_ENABLED=0
+  - GO111MODULE=on
+  main: main.go
+  dir: ./caddy-build
+  binary: caddy
+  goos:
+  - darwin
+  - linux
+  - windows
+  - freebsd
+  goarch:
+  - amd64
+  - 386
+  - arm
+  - arm64
+  goarm:
+  - 6
+  - 7
+  ignore:
+    - goos: darwin
+      goarch: 386
+    - goos: darwin
+      goarch: arm
+  flags:
+  - -trimpath
+  ldflags:
+  - -s -w
+archives:
+  - format_overrides:
+      - goos: windows
+        format: zip
+    replacements:
+      darwin: macOS
+      linux: Linux
+      windows: Windows
+      386: i386
+      amd64: x86_64
+checksum:
+  algorithm: sha512
+release:
+  github:
+    owner: caddyserver
+    name: caddy
+  draft: true
+  prerelease: auto
+changelog:
+  sort: asc
+  filters:
+    exclude:
+    - '^docs:'
+    - '^test:'
+    - '^chore:'
+    - '^\w+\s+' # a hack to remove commit messages without colons thus don't correspond to a package