buildx: build history export

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

__tests__/fixtures/hello-bake.hcl

@@ -0,0 +1,39 @@
+// Copyright 2024 actions-toolkit authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+target "hello" {
+  dockerfile = "hello.Dockerfile"
+}
+
+target "hello-bar" {
+  dockerfile = "hello.Dockerfile"
+  args = {
+    NAME = "bar"
+  }
+}
+
+group "hello-all" {
+  targets = ["hello", "hello-bar"]
+}
+
+target "hello-matrix" {
+  name = "matrix-${name}"
+  matrix = {
+    name = ["bar", "baz", "boo", "far", "faz", "foo", "aaa", "bbb", "ccc", "ddd", "eee", "fff", "ggg", "hhh", "iii", "jjj"]
+  }
+  dockerfile = "hello.Dockerfile"
+  args = {
+    NAME = name
+  }
+}

__tests__/fixtures/hello.Dockerfile

@@ -0,0 +1,20 @@
+# syntax=docker/dockerfile:1
+
+# Copyright 2024 actions-toolkit authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+FROM busybox
+ARG NAME=foo
+ARG TARGETPLATFORM
+RUN echo "Hello $NAME from $TARGETPLATFORM"