ci: update bake-action to v6

Author: crazy-max

.github/workflows/test.yml

@@ -26,8 +26,9 @@ jobs:
         uses: actions/checkout@v4
       -
         name: Test
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
+          source: .
           targets: test
       -
         name: Upload coverage

.github/workflows/validate.yml

@@ -14,21 +14,24 @@ on:
       - 'master'
       - 'releases/v*'
   pull_request:
+    paths-ignore:
+      - '.github/xgo-releases.json'
 
 jobs:
   prepare:
     runs-on: ubuntu-latest
     outputs:
-      targets: ${{ steps.targets.outputs.matrix }}
+      targets: ${{ steps.generate.outputs.targets }}
     steps:
       -
         name: Checkout
         uses: actions/checkout@v4
       -
-        name: Targets matrix
-        id: targets
-        run: |
-          echo "matrix=$(docker buildx bake validate --print | jq -cr '.group.validate.targets')" >> $GITHUB_OUTPUT
+        name: List targets
+        id: generate
+        uses: docker/bake-action/subaction/list-targets@v6
+        with:
+          target: validate
 
   validate:
     runs-on: ubuntu-latest
@@ -39,11 +42,8 @@ jobs:
       matrix:
         target: ${{ fromJson(needs.prepare.outputs.targets) }}
     steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v4
       -
         name: Validate
-        uses: docker/bake-action@v5
+        uses: docker/bake-action@v6
         with:
           targets: ${{ matrix.target }}

docker-bake.hcl

@@ -1,3 +1,9 @@
+target "_common" {
+  args = {
+    BUILDKIT_CONTEXT_KEEP_GIT_DIR = 1
+  }
+}
+
 group "default" {
   targets = ["build"]
 }
@@ -17,6 +23,7 @@ target "build" {
 }
 
 target "build-validate" {
+  inherits = ["_common"]
   dockerfile = "dev.Dockerfile"
   target = "build-validate"
   output = ["type=cacheonly"]
@@ -41,6 +48,7 @@ target "vendor-update" {
 }
 
 target "vendor-validate" {
+  inherits = ["_common"]
   dockerfile = "dev.Dockerfile"
   target = "vendor-validate"
   output = ["type=cacheonly"]