From 32ed63fcddc936fd422f1f482bfc29ea0fc7fa2e Mon Sep 17 00:00:00 2001
From: Martijn Laarman <Mpdreamz@gmail.com>
Date: Thu, 26 Mar 2026 12:16:38 +0100
Subject: [PATCH] Prefix docs-build concurrency group to avoid collisions
 during migration
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When repositories migrate from elastic/docs-builder's preview-build.yml
to elastic/docs-actions' docs-build.yml, both the old and new workflows
coexist temporarily:

- The OLD workflow (on the base branch) triggers via pull_request_target
  and calls preview-build.yml, which defines a concurrency group of
  `${github.workflow}-${branch}`.

- The NEW workflow (on the PR branch) triggers via pull_request and calls
  docs-build.yml, which defined the same concurrency group pattern.

Because both caller workflows typically share the same `name: docs-build`,
they resolve to identical concurrency groups. Both have
cancel-in-progress: true for PR events, so whichever starts second
cancels the first — causing the old workflow's jobs to show as
"cancelled" on the PR checks.

This was observed on elastic/ecs-dotnet#558, where every commit showed
the pull_request_target docs-build run cancelled by the pull_request run
(e.g. commit 3f57a7d: the pull_request_target run started at 14:48:00,
the pull_request run started 3 seconds later and cancelled it).

Adding a `docs-actions-build-` prefix to the concurrency group makes it
distinct from preview-build.yml's group, so both workflows run
independently during the migration window.

Made-with: Cursor
---
 .github/workflows/docs-build.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/docs-build.yml b/.github/workflows/docs-build.yml
index 4e62b2a..e8703db 100644
--- a/.github/workflows/docs-build.yml
+++ b/.github/workflows/docs-build.yml
@@ -43,7 +43,7 @@ permissions:
   pull-requests: read
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.head.ref || github.ref }}
+  group: docs-actions-build-${{ github.workflow }}-${{ github.event.pull_request.head.ref || github.ref }}
   cancel-in-progress: ${{ github.event_name == 'pull_request' }}
 
 jobs: