feat: Add release automation config (#108)

* feat: Add release automation config

* fix: remove unneeded cmd

* feat: add doc for release

* fix: apply review

* ci: fix release process

* chore: fix generate_release_tag

* fix: remove template and fix release.yml

* chore: edit docs

* fix: change flow

* fix: fix error

* chore: fix grep format

* fix: remove libgcc

* fix: add check version

.github/workflows/release.yml

@@ -0,0 +1,77 @@
+name: Release
+
+on:
+  pull_request:
+    branches:
+      - main
+    types: [closed]
+
+env:
+  GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}    
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    container: cibuilds/github:0.13
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Install libgcc
+        run: apk add libgcc
+      - name: Install Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.51.0
+          target: wasm32-unknown-unknown
+          profile: minimal
+          override: true        
+      - name: Get version
+        id: get_version
+        run: |
+            VERSION=$(./devtools/get_version.sh)
+            echo ::set-output name=version::$VERSION
+        env:
+          HEAD_REF: ${{ github.event.pull_request.head.ref }}
+      - name: Check version
+        id: tag_check
+        uses: dudo/tag_check@v1.1.1
+        with:
+          version: ${{ steps.get_version.outputs.version }}
+          git_tag_prefix: v
+
+      - name: Create new tag
+        run: |
+          if [ -z "${{ steps.get_version.outputs.version }}" ]; then
+              git tag ${{ steps.get_version.outputs.version }}
+          fi
+      - name: Install Docker client
+        run: |
+          apk add docker-cli
+      - name: Prepare volume with source code
+        run: |
+          # create a dummy container which will hold a volume with config
+          docker create -v /code --name with_code alpine /bin/true
+          # copy a config file into this volume
+          docker cp ./Cargo.toml with_code:/code
+          docker cp ./contracts with_code:/code
+          docker cp ./packages with_code:/code
+      - name: Build development contracts
+        run: |
+          echo "Building all contracts under ./contracts"
+          docker run --volumes-from with_code cosmwasm/rust-optimizer:0.11.0 ./contracts/*/
+      - name: Check development contracts
+        working-directory: ./
+        run: |
+          echo "Checking all contracts under ./artifacts"
+          docker run --volumes-from with_code rust:1.51.0 /bin/bash -e -c 'cd ./code/packages/vm; ./examples/check_contract.sh ../../artifacts/*.wasm'
+          docker cp with_code:/code/artifacts .
+
+      - name: Create Release
+        id: create_release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: v${{ steps.get_version.outputs.version }}
+          body: ${{ github.event.pull_request.body }}
+          files: |
+            ./artifacts/*
+          draft: false
+          prerelease: false

devtools/get_version.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+packages=("cosmwasm-derive" "cosmwasm-schema" "cosmwasm-std" "cosmwasm-storage" "cosmwasm-vm")
+
+V=$(cargo tree -i "cosmwasm-crypto" | grep -o -E "\d+(\.\d+){2}-\d+(\.\d+){2}" | head -n1)
+
+for ((i = 0; i < ${#packages[@]}; i++)) {
+    if [ "$V" != $(cargo tree -i "${packages[i]}" | grep -o -E "\d+(\.\d+){2}-\d+(\.\d+){2}" | head -n1) ]; then
+        echo "mismatch version"
+        exit 1
+    fi
+}
+
+echo "$V"

docs/release.md

@@ -0,0 +1,23 @@
+# How to release.
+- Please refer to the following file for the config file for release.
+1. .github/changelog.yml
+  - Update CHANGELOG when issuing a PR for release.
+2. .github/release.yml
+  - Executed when PR is merged into main.
+
+### What we can do with this.
+1. Automatically create a new version from the branch name.
+2. Upload dev contracts
+3. Publish
+
+### Release process
+1. Update the version using the script (`devtools/set_version.sh`).
+2. Update the changelog using the script (`devtools/update_changelog.sh`).
+   - the script generates and appends new logs to `CHANGELOG.md` using [git-chglog](https://github.com/git-chglog/git-chglog).
+3. Review the changelogs generated by scripts.
+4. Make a release PR with a proper target branch.
+  - The PR comment becomes the body of the release note. 
+5. Do PR review and merge.
+6. After merging it, CI will detect version changes.
+  - __comparing with a previously released version using cargo command (`cargo tree -i cosmwasm-xxx`)__
+7. CI will create a new version tag and publish artifacts with release notes.