bake: add tests for call and list

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

docs/reference/buildx_bake.md

@@ -16,7 +16,11 @@ Build from a file
 | Name                                | Type          | Default | Description                                                                                         |
 |:------------------------------------|:--------------|:--------|:----------------------------------------------------------------------------------------------------|
 | [`--builder`](#builder)             | `string`      |         | Override the configured builder instance                                                            |
+| `--call`                            | `string`      | `build` | Set method for evaluating build (`check`, `outline`, `targets`)                                     |
+| `--check`                           | `bool`        |         | Shorthand for `--call=check`                                                                        |
 | [`-f`](#file), [`--file`](#file)    | `stringArray` |         | Build definition file                                                                               |
+| `--list-targets`                    | `bool`        |         | List available targets                                                                              |
+| `--list-variables`                  | `bool`        |         | List defined variables                                                                              |
 | `--load`                            | `bool`        |         | Shorthand for `--set=*.output=type=docker`                                                          |
 | [`--metadata-file`](#metadata-file) | `string`      |         | Write build result metadata to a file                                                               |
 | [`--no-cache`](#no-cache)           | `bool`        |         | Do not use cache when building the image                                                            |

tests/bake.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 
 	"github.com/containerd/continuity/fs/fstest"
@@ -48,6 +49,10 @@ var bakeTests = []func(t *testing.T, sb integration.Sandbox){
 	testBakeMetadataWarningsDedup,
 	testBakeMultiExporters,
 	testBakeLoadPush,
+	testListTargets,
+	testListVariables,
+	testBakeCallCheck,
+	testBakeCallCheckFlag,
 }
 
 func testBakeLocal(t *testing.T, sb integration.Sandbox) {
@@ -951,3 +956,163 @@ target "default" {
 
 	// TODO: test metadata file when supported by multi exporters https://github.com/docker/buildx/issues/2181
 }
+
+func testListTargets(t *testing.T, sb integration.Sandbox) {
+	bakefile := []byte(`
+target "foo" {
+	description = "This builds foo"
+}
+target "abc" {
+}
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
+	)
+
+	out, err := bakeCmd(
+		sb,
+		withDir(dir),
+		withArgs("--list-targets"),
+	)
+	require.NoError(t, err, out)
+
+	require.Equal(t, "TARGET\tDESCRIPTION\nabc\t\nfoo\tThis builds foo", strings.TrimSpace(out))
+}
+
+func testListVariables(t *testing.T, sb integration.Sandbox) {
+	bakefile := []byte(`
+variable "foo" {
+	default = "bar"
+	description = "This is foo"
+}
+variable "abc" {
+	default = null
+}
+variable "def" {
+}
+target "default" {
+}
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
+	)
+
+	out, err := bakeCmd(
+		sb,
+		withDir(dir),
+		withArgs("--list-variables"),
+	)
+	require.NoError(t, err, out)
+
+	require.Equal(t, "VARIABLE\tVALUE\tDESCRIPTION\nabc\t\t<null>\t\ndef\t\t\t\nfoo\t\tbar\tThis is foo", strings.TrimSpace(out))
+}
+
+func testBakeCallCheck(t *testing.T, sb integration.Sandbox) {
+	dockerfile := []byte(`
+FROM scratch
+COPy foo /foo
+	`)
+	bakefile := []byte(`
+target "validate" {
+	call = "check"
+}
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
+		fstest.CreateFile("Dockerfile", dockerfile, 0600),
+	)
+
+	out, err := bakeCmd(
+		sb,
+		withDir(dir),
+		withArgs("validate"),
+	)
+	require.Error(t, err, out)
+
+	require.Contains(t, out, "validate")
+	require.Contains(t, out, "ConsistentInstructionCasing")
+}
+
+func testBakeCallCheckFlag(t *testing.T, sb integration.Sandbox) {
+	dockerfile := []byte(`
+FROM scratch
+COPy foo /foo
+	`)
+	dockerfile2 := []byte(`
+FROM scratch
+COPY foo$BAR /foo
+		`)
+	bakefile := []byte(`
+target "build" {
+	dockerfile = "a.Dockerfile"
+}
+
+target "another" {
+	dockerfile = "b.Dockerfile"
+}
+`)
+	dir := tmpdir(
+		t,
+		fstest.CreateFile("docker-bake.hcl", bakefile, 0600),
+		fstest.CreateFile("a.Dockerfile", dockerfile, 0600),
+		fstest.CreateFile("b.Dockerfile", dockerfile2, 0600),
+	)
+
+	out, err := bakeCmd(
+		sb,
+		withDir(dir),
+		withArgs("build", "another", "--check"),
+	)
+	require.Error(t, err, out)
+
+	require.Contains(t, out, "build")
+	require.Contains(t, out, "ConsistentInstructionCasing")
+
+	require.Contains(t, out, "another")
+	require.Contains(t, out, "UndefinedVar")
+
+	out, err = bakeCmd(
+		sb,
+		withDir(dir),
+		withArgs("build", "another", "--call", "check,format=json"),
+	)
+	require.Error(t, err, out)
+
+	var res map[string]any
+	err = json.Unmarshal([]byte(out), &res)
+	require.NoError(t, err, out)
+
+	targets, ok := res["target"].(map[string]any)
+	require.True(t, ok)
+
+	build, ok := targets["build"].(map[string]any)
+	require.True(t, ok)
+
+	_, ok = build["build"]
+	require.True(t, ok)
+
+	check, ok := build["check"].(map[string]any)
+	require.True(t, ok)
+
+	warnings, ok := check["warnings"].([]any)
+	require.True(t, ok)
+
+	require.Len(t, warnings, 1)
+
+	another, ok := targets["another"].(map[string]any)
+	require.True(t, ok)
+
+	_, ok = another["build"]
+	require.True(t, ok)
+
+	check, ok = another["check"].(map[string]any)
+	require.True(t, ok)
+
+	warnings, ok = check["warnings"].([]any)
+	require.True(t, ok)
+
+	require.Len(t, warnings, 1)
+}