From ce4dd4c019047909566fb3f3878a92eff378c664 Mon Sep 17 00:00:00 2001
From: Hao Li <1127478+lihaosky@users.noreply.github.com>
Date: Fri, 29 May 2026 11:16:45 -0700
Subject: [PATCH] [FLINK-39796] Fix snapshot bake by pinning bake-action to
 local source

bake-action v7 changed the default of an unset `source` input: it now
falls back to the workflow's git context and bakes it as a remote ref,
so buildx fetches docker-bake.hcl and the build context from the
triggering commit on master.

That breaks the snapshot workflow for two reasons:
  1. master's docker-bake.hcl lacks the `target "docker-metadata-action" {}`
     stub that every dev-* branch defines, so `inherits` fails with
     `failed to find target docker-metadata-action`.
  2. the snapshot Dockerfile is generated at runtime by add-custom.sh into
     the local working tree and is not committed, so a remote bake context
     could not find it anyway.

Setting `source: .` restores the pre-v7 behavior of baking the local
working tree (the checked-out dev-* branch), which has both the generated
Dockerfile and the docker-metadata-action stub.
---
 .github/workflows/snapshot.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.github/workflows/snapshot.yml b/.github/workflows/snapshot.yml
index 604ab1b..be1cf8d 100644
--- a/.github/workflows/snapshot.yml
+++ b/.github/workflows/snapshot.yml
@@ -79,6 +79,14 @@ jobs:
       - name: "Build and push Docker images (supported platforms)"
         uses: docker/bake-action@6614cfa25eff9a0b2b2697efb0b6159e7680d584
         with:
+          # bake-action >= v7 defaults an unset "source" to the workflow's git
+          # context and bakes it as a remote ref, which reads docker-bake.hcl and
+          # the build context from the triggering commit on master. This workflow
+          # needs the local working tree instead: the Dockerfile is generated at
+          # runtime by add-custom.sh, and the docker-metadata-action target it
+          # inherits is only defined in the checked-out dev-* branch. Pin to the
+          # local source to restore the pre-v7 behavior.
+          source: .
           files: |
             .github/workflows/docker-bake.hcl
             ${{ steps.meta.outputs.bake-file }}