chore: Add buildspecs for release orchestration

Author: clareliguori

buildspec.yml

@@ -4,8 +4,10 @@ phases:
   install:
     runtime-versions:
       golang: 1.13
+
   build:
     commands:
+      # Run tests
       - make install-tools
       - make
       - make integration-test

buildspec_push_release.yml

@@ -0,0 +1,36 @@
+version: 0.2
+
+phases:
+  install:
+    runtime-versions:
+      ruby: 2.6
+    commands:
+      # TODO: Upgrade to final v2 dpl production version
+      # https://github.com/travis-ci/dpl/tree/v2.0.0.alpha.2#github-releases
+      - "gem install dpl:'<2.0.0'"
+      - git config credential.helper "store --file=.git/credentials"
+      - echo "https://${GITHUB_TOKEN}:@github.com" > .git/credentials
+
+  build:
+    commands:
+      # Push changelog update and new version tag
+      - export NEW_VERSION=`cat VERSION`
+      - export GIT_COMMIT_ID=`git rev-parse HEAD`
+      - git push origin HEAD:mainline
+      - git push origin v$NEW_VERSION
+
+      # Determine the artifacts to publish
+      - echo 'Artifacts to publish to the release target:'
+      - cat ./$GIT_COMMIT_ID.manifest
+      - export DPL_FILE_FLAGS=""
+      - |-
+        for artifact in `cat ./$GIT_COMMIT_ID.manifest`
+        do
+          export DPL_FILE_FLAGS="$DPL_FILE_FLAGS --file=$artifact --file=$artifact.md5 --file=$artifact.sha256"
+        done
+      - echo $DPL_FILE_FLAGS
+
+      # Create a GitHub release for the new version
+      - dpl --provider=releases --skip-cleanup --api_key=$GITHUB_TOKEN --target_commitish=$GIT_COMMIT_ID --name='img2lambda v$NEW_VERSION' --repo=awslabs/aws-lambda-container-image-converter $DPL_FILE_FLAGS
+    finally:
+      - rm -f .git/credentials

buildspec_stage_release.yml

@@ -0,0 +1,59 @@
+version: 0.2
+
+phases:
+  install:
+    runtime-versions:
+      golang: 1.13
+      nodejs: 10
+    commands:
+      - npm install -g standard-version@^7.0.0
+      - git config user.name "Release Automation"
+      - git config user.email $COMMIT_EMAIL_ADDRESS
+
+  build:
+    commands:
+      # Prevent generating a new release if there are no new commits
+      - export CURRENT_VERSION=`cat VERSION`
+      - export COMMITS_TO_RELEASE=`git log --pretty=oneline v$CURRENT_VERSION..HEAD | wc -l`
+      - |-
+        if [ $COMMITS_TO_RELEASE -eq 0 ]
+        then
+          echo No changes to release!
+          echo Current release: $CURRENT_VERSION
+          exit 1
+        fi
+
+      # Generate a new version number, changelog entry, and version tag, based on conventional commits since the last release
+      - standard-version
+
+      # Print information about the release for review. Prevent major version bumps (these warrant extra scrutiny)
+      - export NEW_VERSION=`cat VERSION`
+      - export GIT_COMMIT_ID=`git rev-parse HEAD`
+      - echo "Commit ID to release: $GIT_COMMIT_ID"
+      - |-
+        if echo "$NEW_VERSION" | grep -q "^1\."
+        then
+          echo New version: v$NEW_VERSION
+          echo Previous version: v$CURRENT_VERSION
+          echo Changes to release:
+          git log --pretty=oneline v$CURRENT_VERSION..v$NEW_VERSION
+        else
+          echo Uh oh, new major version! v$NEW_VERSION
+          exit 1
+        fi
+
+      # Build release binaries
+      - make stage-release-binaries
+      - echo "Built artifacts:"
+      - ls -lah ./bin/release-$NEW_VERSION
+      - ./bin/release-$NEW_VERSION/linux-amd64-img2lambda --version
+
+      # Generate release manifest
+      - export MANIFESTFILE="$GIT_COMMIT_ID.manifest"
+      - echo bin/release-$NEW_VERSION/linux-amd64-img2lambda >> $MANIFESTFILE
+      - echo bin/release-$NEW_VERSION/darwin-amd64-img2lambda >> $MANIFESTFILE
+      - echo bin/release-$NEW_VERSION/windows-amd64-img2lambda.exe >> $MANIFESTFILE
+
+artifacts:
+  files:
+    - '**/*'