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package tests
import (
"os"
"os/exec"
"path/filepath"
"reflect"
"strconv"
"strings"
"sync"
"testing"
"github.com/Masterminds/semver/v3"
"github.com/containerd/continuity/fs/fstest"
"github.com/moby/buildkit/util/testutil/integration"
"github.com/stretchr/testify/require"
)
const defaultBuildKitTag = "buildx-stable-1"
var buildkitImage string
func tmpdir(t *testing.T, appliers ...fstest.Applier) string {
t.Helper()
tmpdir := t.TempDir()
err := fstest.Apply(appliers...).Apply(tmpdir)
require.NoError(t, err)
return tmpdir
}
type cmdOpt func(*exec.Cmd)
func withEnv(env ...string) cmdOpt {
return func(cmd *exec.Cmd) {
cmd.Env = append(cmd.Env, env...)
}
}
func withArgs(args ...string) cmdOpt {
return func(cmd *exec.Cmd) {
cmd.Args = append(cmd.Args, args...)
}
}
func withDir(dir string) cmdOpt {
return func(cmd *exec.Cmd) {
cmd.Dir = dir
}
}
func buildxCmd(sb integration.Sandbox, opts ...cmdOpt) *exec.Cmd {
cmd := exec.Command("buildx")
cmd.Env = append([]string{}, os.Environ()...)
for _, opt := range opts {
opt(cmd)
}
if builder := sb.Address(); builder != "" {
cmd.Env = append(cmd.Env,
"BUILDX_CONFIG="+buildxConfig(sb),
"BUILDX_BUILDER="+builder,
)
}
if context := sb.DockerAddress(); context != "" {
cmd.Env = append(cmd.Env, "DOCKER_CONTEXT="+context)
}
if isExperimental() {
cmd.Env = append(cmd.Env, "BUILDX_EXPERIMENTAL=1")
}
if v := os.Getenv("GO_TEST_COVERPROFILE"); v != "" {
coverDir := filepath.Join(filepath.Dir(v), "helpers")
cmd.Env = append(cmd.Env, "GOCOVERDIR="+coverDir)
}
return cmd
}
func dockerCmd(sb integration.Sandbox, opts ...cmdOpt) *exec.Cmd {
cmd := exec.Command("docker")
cmd.Env = append([]string{}, os.Environ()...)
for _, opt := range opts {
opt(cmd)
}
if context := sb.DockerAddress(); context != "" {
cmd.Env = append(cmd.Env, "DOCKER_CONTEXT="+context)
}
return cmd
}
func buildxConfig(sb integration.Sandbox) string {
if builder := sb.Address(); builder != "" {
return "/tmp/buildx-" + builder
}
return ""
}
func isMobyWorker(sb integration.Sandbox) bool {
name, _, hasFeature := driverName(sb.Name())
return name == "docker" && !hasFeature
}
func isMobyContainerdSnapWorker(sb integration.Sandbox) bool {
name, _, hasFeature := driverName(sb.Name())
return name == "docker" && hasFeature
}
func isDockerWorker(sb integration.Sandbox) bool {
name, _, _ := driverName(sb.Name())
return name == "docker"
}
func isDockerContainerWorker(sb integration.Sandbox) bool {
name, _, _ := driverName(sb.Name())
return name == "docker-container"
}
func driverName(sbName string) (string, bool, bool) {
name := sbName
var hasVersion, hasFeature bool
if b, _, ok := strings.Cut(sbName, "@"); ok {
name = b
hasVersion = true
}
if b, _, ok := strings.Cut(name, "+"); ok {
name = b
hasFeature = true
}
return name, hasVersion, hasFeature
}
func isExperimental() bool {
if v, ok := os.LookupEnv("TEST_BUILDX_EXPERIMENTAL"); ok {
vv, _ := strconv.ParseBool(v)
return vv
}
return false
}
func buildkitTag() string {
if v := os.Getenv("TEST_BUILDKIT_TAG"); v != "" {
return v
}
return defaultBuildKitTag
}
var (
bkvers map[string]string
bkversMu sync.Mutex
)
func buildkitVersion(t *testing.T, sb integration.Sandbox) string {
bkversMu.Lock()
defer bkversMu.Unlock()
if bkvers == nil {
bkvers = make(map[string]string)
}
ver, ok := bkvers[sb.Name()]
if !ok {
out, err := inspectCmd(sb, withArgs(sb.Address()))
require.NoError(t, err, out)
for _, line := range strings.Split(out, "\n") {
if v, ok := strings.CutPrefix(line, "BuildKit version:"); ok {
ver = strings.TrimSpace(v)
bkvers[sb.Name()] = ver
}
}
if ver == "" {
t.Logf("BuildKit version not found in inspect output, extract it from the image.\n%s", out)
undockBin, err := exec.LookPath("undock")
require.NoError(t, err, "undock not found")
destDir := t.TempDir()
t.Cleanup(func() {
os.RemoveAll(destDir)
})
cmd := exec.Command(undockBin, "--cachedir", "/root/.cache/undock", "--include", "/usr/bin/buildkitd", "--rm-dist", buildkitImage, destDir)
require.NoErrorf(t, cmd.Run(), "failed to extract buildkitd binary from %q", buildkitImage)
cmd = exec.Command(filepath.Join(destDir, "usr", "bin", "buildkitd"), "--version")
out, err := cmd.CombinedOutput()
require.NoErrorf(t, err, "failed to get BuildKit version from %q: %s", buildkitImage, string(out))
v := strings.Fields(strings.TrimSpace(string(out)))
if len(v) != 4 {
require.Fail(t, "unexpected version format: "+strings.TrimSpace(string(out)))
}
ver = v[2]
bkvers[sb.Name()] = ver
}
}
return ver
}
func matchesBuildKitVersion(t *testing.T, sb integration.Sandbox, constraint string) bool {
c, err := semver.NewConstraint(constraint)
if err != nil {
return false
}
v, err := semver.NewVersion(buildkitVersion(t, sb))
if err != nil {
// if the version is not a valid semver, we assume it matches (master)
return true
}
return c.Check(v)
}
func skipNoCompatBuildKit(t *testing.T, sb integration.Sandbox, constraint string, msg string) {
if !matchesBuildKitVersion(t, sb, constraint) {
t.Skipf("buildkit version %s does not match %s constraint (%s)", buildkitVersion(t, sb), constraint, msg)
}
}
func ptrstr(s interface{}) *string {
var n *string
if reflect.ValueOf(s).Kind() == reflect.String {
ss := s.(string)
n = &ss
}
return n
}
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