From ee6b8361da455f2144adfa8b1dd133f9970f17fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?B=E1=B4=87=CA=80=C9=B4=E1=B4=85=20S=E1=B4=84=CA=9C?=
 =?UTF-8?q?=E1=B4=8F=CA=80=C9=A2=E1=B4=87=CA=80s?= <me@bjw-s.dev>
Date: Thu, 3 Feb 2022 16:09:38 +0100
Subject: [PATCH] ci: Add PR validation flow
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Signed-off-by: Bᴇʀɴᴅ Sᴄʜᴏʀɢᴇʀs <me@bjw-s.dev>
---
 .github/workflows/pr-get-metadata.yaml | 71 ++++++++++++++++++++++++++
 .github/workflows/pr-validate.yaml     | 14 +++++
 2 files changed, 85 insertions(+)
 create mode 100644 .github/workflows/pr-get-metadata.yaml
 create mode 100644 .github/workflows/pr-validate.yaml

diff --git a/.github/workflows/pr-get-metadata.yaml b/.github/workflows/pr-get-metadata.yaml
new file mode 100644
index 00000000..79cbc986
--- /dev/null
+++ b/.github/workflows/pr-get-metadata.yaml
@@ -0,0 +1,71 @@
+name: "Pull Request: Get metadata"
+
+on:
+  workflow_call:
+    outputs:
+      isRenovatePR:
+        description: "Is the PR coming from Renovate?"
+        value: ${{ jobs.pr-metadata.outputs.isRenovatePR }}
+      isFork:
+        description: "Is the PR coming from a forked repo?"
+        value: ${{ jobs.pr-metadata.outputs.isFork }}
+      addedOrModified:
+        description: "Does the PR contain any changes?"
+        value: ${{ jobs.pr-changes.outputs.addedOrModified }}
+      addedOrModifiedFiles:
+        description: "A list of the files changed in this PR"
+        value: ${{ jobs.pr-changes.outputs.addedOrModifiedFiles }}
+      addedOrModifiedCharts:
+        description: "A list of the charts changed in this PR"
+        value: ${{ jobs.pr-changes.outputs.addedOrModifiedCharts }}
+
+jobs:
+  pr-metadata:
+    name: Collect PR metadata
+    runs-on: ubuntu-latest
+    outputs:
+      isRenovatePR: ${{ startsWith(steps.branch-name.outputs.current_branch, 'renovate/') }}
+      isFork: ${{ github.event.pull_request.head.repo.full_name != github.repository }}
+    steps:
+      - name: Get branch name
+        id: branch-name
+        uses: tj-actions/branch-names@v5.1
+
+  pr-changes:
+    name: Collect PR changes
+    runs-on: ubuntu-latest
+    outputs:
+      addedOrModified: ${{ steps.filter.outputs.addedOrModified }}
+      addedOrModifiedFiles: ${{ steps.filter.outputs.addedOrModified_files }}
+      addedOrModifiedCharts: ${{ steps.filter-charts.outputs.addedOrModified }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Collect changed files
+        uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          list-files: shell
+          filters: |
+            addedOrModified:
+              - added|modified: 'charts/**'
+
+      - name: Collect changed charts
+        if: |
+          steps.filter.outputs.addedOrModified == 'true'
+        id: filter-charts
+        run: |
+          CHARTS=()
+          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
+          # Get only the chart paths
+          for CHARTPATH in "${PATHS[@]}"
+          do
+            IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
+            CHARTS+=("${path_parts[1]}/${path_parts[2]}")
+          done
+
+          # Remove duplicates
+          CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )
+          # Set output to changed charts
+          printf "::set-output name=addedOrModified::%s\n" "${CHARTS[*]}"
diff --git a/.github/workflows/pr-validate.yaml b/.github/workflows/pr-validate.yaml
new file mode 100644
index 00000000..2e4232a8
--- /dev/null
+++ b/.github/workflows/pr-validate.yaml
@@ -0,0 +1,14 @@
+name: "Pull Request: Validate"
+
+on:
+  pull_request:
+    branches:
+      - master
+
+concurrency:
+  group: ${{ github.head_ref }}-pr-validate
+  # cancel-in-progress: true
+
+jobs:
+  pr-get-metadata:
+    uses: k8s-at-home/charts/.github/workflows/pr-get-metadata.yaml@master