From 75d7257b201a56f950c20cd9f5753a83fff4742b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Filipe=20La=C3=ADns?= <filipe.lains@gmail.com>
Date: Thu, 14 May 2020 23:11:40 +0100
Subject: bpo-40548: GitHub Action workflow: skip jobs on doc only PRs
 (GH-19983)
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Signed-off-by: Filipe Laíns <lains@archlinux.org>
---
 .github/workflows/build.yml | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6e6a6d2..dabfb79 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -16,9 +16,27 @@ on:
     - 3.7
 
 jobs:
+  check_source:
+    name: 'Check for source changes'
+    runs-on: ubuntu-latest
+    outputs:
+      run_tests: ${{ steps.check.outputs.run_tests }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: Check for source changes
+        id: check
+        run: |
+          if [ -z "GITHUB_BASE_REF" ]; then
+            echo '::set-output name=run_tests::true'
+          else
+            git fetch origin $GITHUB_BASE_REF --depth=1
+            git diff --name-only origin/$GITHUB_BASE_REF... | grep -qvE '(\.rst$|^Doc|^Misc)' && echo '::set-output name=run_tests::true'
+          fi
   build_win32:
     name: 'Windows (x86)'
     runs-on: windows-latest
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true'
     steps:
     - uses: actions/checkout@v1
     - name: Build CPython
@@ -31,6 +49,8 @@ jobs:
   build_win_amd64:
     name: 'Windows (x64)'
     runs-on: windows-latest
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true'
     steps:
     - uses: actions/checkout@v1
     - name: Build CPython
@@ -43,6 +63,8 @@ jobs:
   build_macos:
     name: 'macOS'
     runs-on: macos-latest
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true'
     steps:
     - uses: actions/checkout@v1
     - name: Configure CPython
@@ -57,6 +79,8 @@ jobs:
   build_ubuntu:
     name: 'Ubuntu'
     runs-on: ubuntu-latest
+    needs: check_source
+    if: needs.check_source.outputs.run_tests == 'true'
     env:
       OPENSSL_VER: 1.1.1f
     steps:
-- 
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