NEW Create gha-trigger-ci

.github/LICENSE

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+BSD 3-Clause License
+
+Copyright (c) 2023, Silverstripe Limited - www.silverstripe.com
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright notice, this
+list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+* Neither the name of the copyright holder nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

.github/workflows/action-ci.yml

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+name: Action CI
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  actionci:
+    name: Action CI
+    uses: silverstripe/gha-action-ci/.github/workflows/action-ci.yml@v1

.github/workflows/auto-tag.yml

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+name: Auto-tag
+on:
+  push:
+    tags:
+      - '*.*.*'
+jobs:
+  auto-tag:
+    name: Auto-tag
+    runs-on: ubuntu-latest
+    steps:
+      - name: Auto-tag
+        uses: silverstripe/gha-auto-tag@v1

.github/workflows/keepalive.yml

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+name: Keepalive
+
+on:
+  # At 3:15 PM UTC, on day 20 of the month
+  schedule:
+    - cron: '15 15 20 * *'
+  workflow_dispatch:
+
+jobs:
+  keepalive:
+    name: Keepalive
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Keepalive
+        uses: silverstripe/gha-keepalive@v1

.github/workflows/merge-up.yml

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+name: Merge-up
+
+on:
+  # At 3:15 PM UTC, only on Thursday
+  schedule:
+    - cron: '15 15 * * 4'
+  workflow_dispatch:
+
+jobs:
+  merge-up:
+    name: Merge-up
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Merge-up
+        uses: silverstripe/gha-merge-up@v1

README.md

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 # gha-trigger-ci
-GitHub Actions Workflow - Trigger a CI workflow
+
+Trigger a Silverstripe CI workflow
+
+For repositories on the Silverstripe account there are currently 3 different filenames that a CI workflow can be:
+- ci.yml -- used for regular modules
+- action-ci.yml -- used on gha-* repositories
+- action-ci-self.yml -- used only on gha-action-ci
+
+This action will find and trigger the appropriate CI workflow.
+
+Note this is similarly named but distinct from [gha-dispatch-ci](https://github.com/silverstripe/gha-dispatch-ci) which 
+is used on a schedule event to trigger a CI workflow on two different major versions of supported Silverstripe modules.
+
+## Usage
+
+**workflow.yml**
+```yml
+steps:
+  - name: Trigger CI
+    uses: silverstripe/gha-trigger-ci@v1
+    with:
+      branch: 4.13
+```
+
+### Inputs:
+
+#### Branch
+The branch to run the workflow on
+`branch: pulls/4/my-branch`
+
+#### Validate branch
+Whether to validate if the branch exists via GitHub API. You may wish to disable this if the branch was only just created 
+and the GitHub API hasn't caught up yet. Defaults is `true`
+`validate-branch: false`

action.yml

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+name: Trigger CI
+description: GitHub Action to find and trigger the appropriate CI workflow
+
+inputs:
+  branch:
+    type: string
+    required: true
+  validate_branch:
+    type: boolean
+    required: false
+    default: true
+
+runs:
+  using: composite
+  steps:
+
+    - name: Validate branch exists
+      shell: bash
+      if: inputs.validate_branch
+      env:
+        GITHUB_REPOSITORY: ${{ github.repository }}
+        BRANCH: ${{ inputs.branch }}
+      run: |
+        # https://docs.github.com/en/free-pro-team@latest/rest/branches/branches?apiVersion=2022-11-28#list-branches
+        RESP_CODE=$(curl -w %{http_code} -s -L -o __branches.json \
+          -X GET \
+          -H "Accept: application/vnd.github+json" \
+          -H "Authorization: Bearer ${{ github.token }}"\
+          -H "X-GitHub-Api-Version: 2022-11-28" \
+          https://api.github.com/repos/$GITHUB_REPOSITORY/branches?per_page=100 \
+        )
+        if [[ $RESP_CODE != "200" ]]; then
+          echo "Failed to read branches - HTTP response code was $RESP_CODE"
+          exit 1
+        fi
+        if [[ $(cat __branches.json | jq "any(.[]; .name == \"$BRANCH\")") == "false" ]]; then
+          echo "Could not find branch $BRANCH"
+          exit 1
+        fi
+
+    - name: Find workflow
+      id: find-workflow
+      shell: bash
+      env:
+        GITHUB_REPOSITORY: ${{ github.repository }}
+        BRANCH: ${{ inputs.branch }}
+      run: |
+        FOUND=0
+        # Need to loop specifically in this order to find the right file, this is because:
+        # - gha-ci has both a ci.yml file (shared with other workflows) and an action-ci.yml file (the one we want to run)
+        # - gha-action-ci has both an action-ci.yml file (shared with other workflows) and an action-ci-self.yml file (the one we want to run)
+        FILENAMES='action-ci-self.yml action-ci.yml ci.yml'
+        for FILENAME in $FILENAMES; do
+          URL=https://raw.githubusercontent.com/$GITHUB_REPOSITORY/$BRANCH/.github/workflows/$FILENAME
+          RESP_CODE=$(curl -w %{http_code} -s -L -o /dev/null $URL)
+          if [[ $RESP_CODE == "200" ]]; then
+            FOUND=1
+            echo "FILENAME is $FILENAME"
+            echo "filename=$FILENAME" >> $GITHUB_OUTPUT
+            break
+          fi
+        done
+        if [[ $FOUND == 0 ]]; then
+          echo "Could not workflow file for branch $BRANCH - tried $FILENAMES"
+          exit 1
+        fi
+
+    - name: Send API request
+      shell: bash
+      env:
+        GITHUB_REPOSITORY: ${{ github.repository }}
+        BRANCH: ${{ inputs.branch }}
+        FILENAME: ${{ steps.find-workflow.outputs.filename }}
+      run: |
+        # https://docs.github.com/en/rest/actions/workflows?apiVersion=2022-11-28#create-a-workflow-dispatch-event
+        RESP_CODE=$(curl -w %{http_code} -s -L -o /dev/null \
+          -X POST \
+          -H "Accept: application/vnd.github+json" \
+          -H "Authorization: Bearer ${{ github.token }}"\
+          -H "X-GitHub-Api-Version: 2022-11-28" \
+          https://api.github.com/repos/$GITHUB_REPOSITORY/actions/workflows/$FILENAME/dispatches \
+          -d "{\"ref\":\"$BRANCH\"}"
+        )
+        if [[ $RESP_CODE != "204" ]]; then
+          echo "Failed to dispatch workflow - HTTP response code was $RESP_CODE"
+          exit 1
+        fi
+
+    - name: Delete temporary files
+      shell: bash
+      if: always()
+      run: |
+        if [[ -f __branches.json ]]; then
+          rm __branches.json
+        fi