daml/ci/prs.yml

# Copyright (c) 2021 Digital Asset (Switzerland) GmbH and/or its affiliates. All rights reserved.
# SPDX-License-Identifier: Apache-2.0

trigger: none

pr:
  autoCancel: true # cancel previous builds on push
  branches:
    include:
      - main
      - release/*

jobs:
- template: build.yml

- job: check_standard_change_label
  dependsOn:
    - git_sha
  variables:
    fork_sha: $[ dependencies.git_sha.outputs['out.fork_point'] ]
    branch_sha: $[ dependencies.git_sha.outputs['out.branch'] ]
  condition: eq(variables['Build.Reason'], 'PullRequest')
  pool:
    name: 'linux-pool'
    demands: assignment -equals default
  steps:
    - checkout: self
    - bash: |
        set -euo pipefail

        has_changed () {
            git diff $(fork_sha) $(branch_sha) --name-only | grep -q "^$1"
        }

        fail_if_missing_std_change_label () {
            curl https://api.github.com/repos/digital-asset/daml/pulls/$PR -s | jq -r '.labels[].name' | grep -q '^Standard-Change$'
        }

        if has_changed "infra/" || has_changed "LATEST"; then
            fail_if_missing_std_change_label
        fi        
      env:
        PR: $(System.PullRequest.PullRequestNumber)

- job: check_changelog_entry
  dependsOn:
    - git_sha
  variables:
    fork_sha: $[ dependencies.git_sha.outputs['out.fork_point'] ]
    branch_sha: $[ dependencies.git_sha.outputs['out.branch'] ]
    pr.num: $[ variables['System.PullRequest.PullRequestNumber'] ]
  condition: eq(variables['Build.Reason'], 'PullRequest')
  pool:
    name: 'linux-pool'
    demands: assignment -equals default
  steps:
    - checkout: self
    - template: bash-lib.yml
      parameters:
        var_name: bash-lib
    - bash: |
        set -euo pipefail
        source $(bash-lib)
        git checkout $(branch_sha)
        if ci/check-changelog.sh $(fork_sha); then
            exit 0
        else
            user=$(user_slack_handle $(branch_sha))
            if [ "$user" != "" ]; then
                tell_slack "<@${user}> <https://dev.azure.com/digitalasset/daml/_build/results?buildId=$(Build.BuildId)|Build $(Build.BuildId)> for <https://github.com/digital-asset/daml/pull/$(pr.num)|PR $(pr.num)> is missing a changelog entry." \
                       "$(Slack.team-daml-ci)"
            fi
            exit 1
        fi        

# required for collect_build_data
- job: release
  condition: false

- job: notify_release_pr
  condition: and(not(canceled()),
                 startsWith(variables['Build.SourceBranchName'], 'auto-release-pr-'),
                 eq(dependencies.check_for_release.outputs['out.is_release'], 'true'))
  dependsOn:
    - git_sha
    - collect_build_data
    - check_for_release
  pool:
    name: 'linux-pool'
    demands: assignment -equals default
  variables:
    branch_sha: $[ dependencies.git_sha.outputs['out.branch'] ]
    status: $[ dependencies.collect_build_data.result ]
    is_release: $[ dependencies.check_for_release.outputs['out.is_release'] ]
  steps:
    - checkout: self
      persistCredentials: true
    - template: bash-lib.yml
      parameters:
        var_name: bash-lib
    - bash: |
        set -euo pipefail

        source $(bash-lib)

        AUTH="$(get_gh_auth_header)"
        PR=$(curl -H "$AUTH" \
                  -H "Accept: application/vnd.github.groot-preview+json" \
                  -s -f \
                  "https://api.github.com/repos/digital-asset/daml/commits/$(git rev-parse HEAD)/pulls" \
             | jq '.[0].number' \
             || echo "")
        # Note: if we somehow fail to resolve the PR number from the GitHub
        # API, there is still value in getting the notification on Slack, as
        # we do have the build number and from there we can click through to
        # the PR. Hence the `|| echo ""`.
        PR_HANDLER=$(head -1 release/rotation | awk '{print $1}')

        case "$(status)" in
          Succeeded*)
            msg="has succeeded! Next step is to approve & merge."
            ;;
          Failed*)
            msg="has failed. Please investigate."
            ;;
          *)
            # Should not be reached, but who knows?
            msg="has completed with status $(status). See <https://github.com/digital-asset/daml/blob/main/release/RELEASE.md|RELEASE.md> for what to do next."
            ;;
          esac
        tell_slack "<@${PR_HANDLER}> <https://dev.azure.com/digitalasset/daml/_build/results?buildId=$(Build.BuildId)|Build $(Build.BuildId)> for release PR <https://github.com/digital-asset/daml/pull/${PR}|#${PR}> $msg"        

- job: notify_user
  condition: and(eq(variables['Build.Reason'], 'PullRequest'), not(canceled()))
  dependsOn:
    - git_sha
    - collect_build_data
    - check_for_release
    - check_changelog_entry
  pool:
    name: 'linux-pool'
    demands: assignment -equals default
  variables:
    pr.num: $[ variables['System.PullRequest.PullRequestNumber'] ]
    branch_sha: $[ dependencies.git_sha.outputs['out.branch'] ]
    build_status: $[ dependencies.collect_build_data.result ]
    changelog_status: $[ dependencies.check_changelog_entry.result ]
  steps:
    - template: bash-lib.yml
      parameters:
        var_name: bash-lib
    - bash: |
        set -euo pipefail
        source $(bash-lib)

        user=$(user_slack_handle $(branch_sha))
        if [ "$user" != "" ]; then
            tell_slack "<@${user}> <https://dev.azure.com/digitalasset/daml/_build/results?buildId=$(Build.BuildId)|Build $(Build.BuildId)> for <https://github.com/digital-asset/daml/pull/$(pr.num)|PR $(pr.num)> has completed with status $(build_status) (changelog: $(changelog_status))." \
                       "$(Slack.team-daml-ci)"
        fi