From 4c6abfa10b0af22bf341aa79e4f58188fb8e1494 Mon Sep 17 00:00:00 2001
From: Lyndon Maydwell <lyndon@sordina.net>
Date: Tue, 16 Apr 2024 09:45:52 +1000
Subject: [PATCH] check for first commit

---
 .github/workflows/registry-updates.yaml | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/registry-updates.yaml b/.github/workflows/registry-updates.yaml
index 5a9ccbc2..7c6a0326 100644
--- a/.github/workflows/registry-updates.yaml
+++ b/.github/workflows/registry-updates.yaml
@@ -16,8 +16,20 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v2
 
+      - name: Check if it's the first commit on branch
+        id: check_first_commit
+        run: |
+          if [ "${{ github.event.before }}" == "0000000000000000000000000000000000000000" ]; then
+            echo "::set-output name=first_commit::true"
+          else
+            echo "::set-output name=first_commit::false"
+          fi
+
       - name: List changed files
         id: list_files
         run: |
-          git diff --name-only ${{ github.event.before }} ${{ github.event.after }} > changed_files.txt
-
+          if [ "${{ steps.check_first_commit.outputs.first_commit }}" == "true" ]; then
+            git ls-tree --name-only -r ${{ github.sha }} > changed_files.txt
+          else
+            git diff --name-only ${{ github.event.before }} ${{ github.sha }} > changed_files.txt
+          fi