update-discord-messages.yaml

name: Update Discord Messages

on:
  push:
    branches:
      - main
    paths:
      - 'messages/**'

jobs:
  update-discord:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2.3.4

      # GitHub Actions doesn't have a native way to execute certain steps within
      # a job based on what files were changed. For this, we use an external
      # action, which sets the "steps.changes.outputs.<filter-name>" to true or
      # false depending on whether it changed.
      #
      # It's important to execute only message updates if the file changed, since
      # an update will change the Discord embed's "Last Updated" datetime, even
      # if there were no content changes. We try to maintain that datetime as
      # accurate as possible, so we want to trigger an update only if there was
      # an actual change.
      - uses: dorny/paths-filter@v2
        id: changes
        with:
          list-files: none
          filters: |
            readme:
              - 'messages/readme.xml'
            pronouns:
              - 'messages/pronouns.xml'
            year:
              - 'messages/year.xml'
            protectedgroups:
              - 'messages/protectedgroups.xml'

      - name: Update main README message
        uses: compsoc-edinburgh/discord-post-updater@master
        if: steps.changes.outputs.readme == 'true'
        with:
          discord_token: ${{ secrets.discord_bot_token }}
          post_xml: messages/readme.xml
          discord_channel: '716143154562203668' # N.B. The quote marks here are required
          discord_message: '1008385178718191719' # Optional, use quotes if specifying an ID

      - name: Update Pronouns
        uses: compsoc-edinburgh/discord-post-updater@master
        if: steps.changes.outputs.pronouns == 'true'
        with:
          discord_token: ${{ secrets.discord_bot_token }}
          post_xml: messages/pronouns.xml
          discord_channel: '716143154562203668' # N.B. The quote marks here are required
          discord_message: '1008385179812892703' # Optional, use quotes if specifying an ID

      - name: Update Academic Year
        uses: compsoc-edinburgh/discord-post-updater@master
        if: steps.changes.outputs.year == 'true'
        with:
          discord_token: ${{ secrets.discord_bot_token }}
          post_xml: messages/year.xml
          discord_channel: '716143154562203668' # N.B. The quote marks here are required
          discord_message: '1008385180945363014' # Optional, use quotes if specifying an ID

      - name: Update Protected Groups
        uses: compsoc-edinburgh/discord-post-updater@master
        if: steps.changes.outputs.protectedgroups == 'true'
        with:
          discord_token: ${{ secrets.discord_bot_token }}
          post_xml: messages/protectedgroups.xml
          discord_channel: '716143154562203668' # N.B. The quote marks here are required
          discord_message: '1008385181977149610' # Optional, use quotes if specifying an ID