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package dockerfile
import (
"context"
"encoding/json"
"os"
"testing"
"github.com/containerd/continuity/fs/fstest"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/frontend/dockerui"
gateway "github.com/moby/buildkit/frontend/gateway/client"
"github.com/moby/buildkit/frontend/subrequests"
"github.com/moby/buildkit/frontend/subrequests/targets"
"github.com/moby/buildkit/util/testutil/integration"
"github.com/moby/buildkit/util/testutil/workers"
"github.com/pkg/errors"
"github.com/stretchr/testify/require"
"github.com/tonistiigi/fsutil"
)
var targetsTests = integration.TestFuncs(
testTargetsList,
testTargetsDescribeDefinition,
)
func testTargetsList(t *testing.T, sb integration.Sandbox) {
integration.SkipOnPlatform(t, "windows")
workers.CheckFeatureCompat(t, sb, workers.FeatureFrontendTargets)
f := getFrontend(t, sb)
if _, ok := f.(*clientFrontend); !ok {
t.Skip("only test with client frontend")
}
dockerfile := []byte(`
# build defines stage for compiling the binary
FROM alpine AS build
RUN true
FROM busybox as second
RUN false
FROM alpine
RUN false
# binary returns the compiled binary
FROM second AS binary
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", []byte(dockerfile), 0600),
)
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
destDir, err := os.MkdirTemp("", "buildkit")
require.NoError(t, err)
defer os.RemoveAll(destDir)
called := false
frontend := func(ctx context.Context, c gateway.Client) (*gateway.Result, error) {
res, err := c.Solve(ctx, gateway.SolveRequest{
FrontendOpt: map[string]string{
"frontend.caps": "moby.buildkit.frontend.subrequests",
"requestid": "frontend.targets",
},
Frontend: "dockerfile.v0",
})
require.NoError(t, err)
list, err := unmarshalTargets(res)
require.NoError(t, err)
require.Equal(t, 1, len(list.Sources))
require.Equal(t, dockerfile, list.Sources[0])
require.Equal(t, 4, len(list.Targets))
target := list.Targets[0]
require.Equal(t, "build", target.Name)
require.Equal(t, "alpine", target.Base)
require.Equal(t, "defines stage for compiling the binary", target.Description)
require.Equal(t, false, target.Default)
require.Equal(t, int32(0), target.Location.SourceIndex)
require.Equal(t, int32(3), target.Location.Ranges[0].Start.Line)
target = list.Targets[1]
require.Equal(t, "second", target.Name)
require.Equal(t, "", target.Description)
require.Equal(t, "busybox", target.Base)
require.Equal(t, false, target.Default)
require.Equal(t, int32(0), target.Location.SourceIndex)
require.Equal(t, int32(6), target.Location.Ranges[0].Start.Line)
target = list.Targets[2]
require.Equal(t, "", target.Name)
require.Equal(t, "", target.Description)
require.Equal(t, "alpine", target.Base)
require.Equal(t, false, target.Default)
require.Equal(t, int32(0), target.Location.SourceIndex)
require.Equal(t, int32(9), target.Location.Ranges[0].Start.Line)
target = list.Targets[3]
require.Equal(t, "binary", target.Name)
require.Equal(t, "returns the compiled binary", target.Description)
require.Equal(t, true, target.Default)
require.Equal(t, int32(0), target.Location.SourceIndex)
require.Equal(t, int32(13), target.Location.Ranges[0].Start.Line)
called = true
return nil, nil
}
_, err = c.Build(sb.Context(), client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
},
}, "", frontend, nil)
require.NoError(t, err)
require.True(t, called)
}
func testTargetsDescribeDefinition(t *testing.T, sb integration.Sandbox) {
integration.SkipOnPlatform(t, "windows")
workers.CheckFeatureCompat(t, sb, workers.FeatureFrontendTargets)
f := getFrontend(t, sb)
if _, ok := f.(*clientFrontend); !ok {
t.Skip("only test with client frontend")
}
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
dockerfile := []byte(`
FROM scratch
COPY Dockerfile Dockerfile
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", dockerfile, 0600),
)
called := false
frontend := func(ctx context.Context, c gateway.Client) (*gateway.Result, error) {
reqs, err := subrequests.Describe(ctx, c)
require.NoError(t, err)
require.True(t, len(reqs) > 0)
hasTargets := false
for _, req := range reqs {
if req.Name != "frontend.targets" {
continue
}
hasTargets = true
require.Equal(t, subrequests.RequestType("rpc"), req.Type)
require.NotEqual(t, req.Version, "")
}
require.True(t, hasTargets)
called = true
return nil, nil
}
_, err = c.Build(sb.Context(), client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
},
}, "", frontend, nil)
require.NoError(t, err)
require.True(t, called)
}
func unmarshalTargets(res *gateway.Result) (*targets.List, error) {
dt, ok := res.Metadata["result.json"]
if !ok {
return nil, errors.Errorf("missing frontend.outline")
}
var l targets.List
if err := json.Unmarshal(dt, &l); err != nil {
return nil, err
}
return &l, nil
}
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