From 49a2e5136765d7d3505f75b9f173f276478a5888 Mon Sep 17 00:00:00 2001
From: Mahe Tardy <mahe.tardy@gmail.com>
Date: Mon, 25 Mar 2024 18:52:45 +0100
Subject: [PATCH] workflows: only check links added by a PR

Previously the PR link checker was checking any link, with this update
it should just try the links added by the PR.

Signed-off-by: Mahe Tardy <mahe.tardy@gmail.com>
---
 .github/workflows/check-links-pr.yaml | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/.github/workflows/check-links-pr.yaml b/.github/workflows/check-links-pr.yaml
index 05ec1237268..9d192dc40ce 100644
--- a/.github/workflows/check-links-pr.yaml
+++ b/.github/workflows/check-links-pr.yaml
@@ -12,6 +12,8 @@ on:
 jobs:
   links-checker:
     runs-on: ubuntu-latest
+    env:
+      PATCH_FILE: "additions.patch"
     steps:
       - name: Checkout
         uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
@@ -24,22 +26,17 @@ jobs:
           hugo-version: '0.120.4'
           extended: true
 
-      - name: Replace GitHub main links with local branch
+      - name: Retrieve diff and replace GitHub main links with local branch
         shell: bash
         run: |
           REPO=${{ github.event.pull_request.head.repo.full_name }}
           BRANCH=${{ github.event.pull_request.head.ref }}
 
-          find docs/content/ -type f -name "*.md" -exec sed -i "s#/cilium/tetragon/tree/main#/$REPO/tree/$BRANCH#g" {} \;
-          sed -i "s#/cilium/tetragon/tree/main#/$REPO/tree/$BRANCH#g" README.md
+          git diff -U0 origin/${{ github.base_ref }} -- docs/content README.md | grep ^\+[^+] > $PATCH_FILE
 
-          find docs/content/ -type f -name "*.md" -exec sed -i "s#/cilium/tetragon/blob/main#/$REPO/blob/$BRANCH#g" {} \;
-          sed -i "s#/cilium/tetragon/blob/main#/$REPO/blob/$BRANCH#g" README.md
-
-          find docs/content/ -type f -name "*.md" -exec sed -i "s#/cilium/tetragon/main#/$REPO/$BRANCH#g" {} \;
-          sed -i "s#/cilium/tetragon/main#/$REPO/$BRANCH#g" README.md
-
-          git diff -U0
+          sed -i "s#/cilium/tetragon/tree/main#/$REPO/tree/$BRANCH#g" $PATCH_FILE
+          sed -i "s#/cilium/tetragon/blob/main#/$REPO/blob/$BRANCH#g" $PATCH_FILE
+          sed -i "s#/cilium/tetragon/main#/$REPO/$BRANCH#g" $PATCH_FILE
 
       - name: Serve the Hugo website
         working-directory: docs
@@ -61,5 +58,5 @@ jobs:
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
         with:
-          args: --config .github/lychee.toml --base http://localhost:1313 docs/content README.md
+          args: --config .github/lychee.toml --base http://localhost:1313 $PATCH_FILE
           fail: true