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exporter_test.go
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package lifecycle_test
import (
"archive/tar"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"math/rand"
"os"
"path/filepath"
"strings"
"testing"
"time"
"github.com/apex/log"
"github.com/apex/log/handlers/discard"
"github.com/apex/log/handlers/memory"
"github.com/buildpacks/imgutil/fakes"
"github.com/buildpacks/imgutil/local"
"github.com/buildpacks/imgutil/remote"
"github.com/google/go-containerregistry/pkg/name"
"github.com/sclevine/spec"
"github.com/sclevine/spec/report"
"github.com/buildpacks/lifecycle"
"github.com/buildpacks/lifecycle/cache"
h "github.com/buildpacks/lifecycle/testhelpers"
)
func TestExporter(t *testing.T) {
rand.Seed(time.Now().UTC().UnixNano())
spec.Run(t, "Exporter", testExporter, spec.Parallel(), spec.Report(report.Terminal{}))
}
func testExporter(t *testing.T, when spec.G, it spec.S) {
var (
exporter *lifecycle.Exporter
tmpDir string
fakeAppImage *fakes.Image
uid = 1234
gid = 4321
logHandler = memory.New()
opts = lifecycle.ExportOptions{
RunImageRef: "run-image-reference",
AdditionalNames: []string{},
}
)
it.Before(func() {
tmpDir, err := ioutil.TempDir("", "lifecycle.exporter.layer")
h.AssertNil(t, err)
launcherPath, err := filepath.Abs(filepath.Join("testdata", "exporter", "launcher"))
h.AssertNil(t, err)
opts.LauncherConfig = lifecycle.LauncherConfig{
Path: launcherPath,
Metadata: lifecycle.LauncherMetadata{
Version: "1.2.3",
Source: lifecycle.SourceMetadata{
Git: lifecycle.GitMetadata{
Repository: "github.com/buildpacks/lifecycle",
Commit: "asdf1234",
},
},
},
}
opts.LayersDir = filepath.Join(tmpDir, "layers")
h.AssertNil(t, os.Mkdir(opts.LayersDir, 0777))
h.AssertNil(t, ioutil.WriteFile(filepath.Join(tmpDir, "launcher"), []byte("some-launcher"), 0777))
fakeAppImage = fakes.NewImage(
"some-repo/app-image",
"some-top-layer-sha",
local.IDIdentifier{
ImageID: "some-image-id",
},
)
opts.WorkingImage = fakeAppImage
opts.AdditionalNames = []string{"some-repo/app-image:foo", "some-repo/app-image:bar"}
exporter = &lifecycle.Exporter{
ArtifactsDir: tmpDir,
Buildpacks: []lifecycle.Buildpack{
{ID: "buildpack.id", Version: "1.2.3"},
{ID: "other.buildpack.id", Version: "4.5.6", Optional: false},
},
Logger: &log.Logger{Handler: logHandler},
UID: uid,
GID: gid,
}
})
it.After(func() {
fakeAppImage.Cleanup()
h.AssertNil(t, os.RemoveAll(tmpDir))
})
when("#Export", func() {
when("previous slice image exists", func() {
var (
sliceSHA string
)
it.Before(func() {
var err error
// LayersDir is a tmp directory
h.RecursiveCopy(t, filepath.Join("testdata", "exporter", "app-slices", "layers"), opts.LayersDir)
opts.AppDir, err = filepath.Abs(filepath.Join(opts.LayersDir, "app"))
h.AssertNil(t, err)
sliceConfigFilePath := filepath.Join(opts.AppDir, "static", "assets", "config.txt")
sliceSvgFilePath := filepath.Join(opts.AppDir, "static", "assets", "logo.svg")
localReusableLayerPath := filepath.Join(opts.LayersDir, "other.buildpack.id/local-reusable-layer")
localReusableLayerSha := h.ComputeSHA256ForPath(t, localReusableLayerPath, uid, gid)
launcherSHA := h.ComputeSHA256ForPath(t, opts.LauncherConfig.Path, uid, gid)
sliceSHA = h.ComputeSHA256ForFiles(t, filepath.Join(opts.LayersDir, "slice-test.tar"), uid, gid, sliceConfigFilePath, sliceSvgFilePath)
fakeAppImage.AddPreviousLayer("sha256:"+localReusableLayerSha, "")
fakeAppImage.AddPreviousLayer("sha256:"+launcherSHA, "")
fakeAppImage.AddPreviousLayer("sha256:orig-launch-layer-no-local-dir-sha", "")
fakeAppImage.AddPreviousLayer("sha256:"+sliceSHA, "")
h.AssertNil(t, json.Unmarshal([]byte(fmt.Sprintf(`
{
"app": [
{
"sha": "sha256:%s"
}
],
"buildpacks": [
{
"key": "buildpack.id",
"layers": {
"launch-layer-no-local-dir": {
"sha": "sha256:orig-launch-layer-no-local-dir-sha",
"data": {
"oldkey": "oldval"
}
}
}
},
{
"key": "other.buildpack.id",
"layers": {
"layer4": {
"sha": "orig-layer4-sha",
"data": {
"layer4key": "layer4val"
}
},
"local-reusable-layer": {
"sha": "sha256:%s"
}
}
}
],
"launcher": {
"sha": "sha256:%s"
}
}`, sliceSHA, localReusableLayerSha, launcherSHA)), &opts.OrigMetadata))
})
it("reuses slice layer if the sha matches the sha in the archive metadata", func() {
h.AssertNil(t, exporter.Export(opts))
sliceLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, "static", "misc", "resources", "reports", "report.tps"))
h.AssertNil(t, err)
assertTarFileExists(t, sliceLayerPath, filepath.Join(opts.AppDir, "static", "misc", "resources", "reports", "numbers.csv"), true)
assertTarFileExists(t, sliceLayerPath, filepath.Join(opts.AppDir, "static", "misc", "resources", "reports", "report.tps"), true)
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, "static", "misc", "resources"), false)
h.AssertContains(t, fakeAppImage.ReusedLayers(), "sha256:"+sliceSHA)
assertLogEntry(t, logHandler, "Reusing 1/4 app layer(s)")
assertLogEntry(t, logHandler, "Adding 3/4 app layer(s)")
})
})
when("previous image exists", func() {
it.Before(func() {
h.RecursiveCopy(t, filepath.Join("testdata", "exporter", "previous-image-exists", "layers"), opts.LayersDir)
var err error
opts.AppDir, err = filepath.Abs(filepath.Join("testdata", "exporter", "previous-image-exists", "layers", "app"))
h.AssertNil(t, err)
localReusableLayerPath := filepath.Join(opts.LayersDir, "other.buildpack.id/local-reusable-layer")
localReusableLayerSha := h.ComputeSHA256ForPath(t, localReusableLayerPath, uid, gid)
launcherSHA := h.ComputeSHA256ForPath(t, opts.LauncherConfig.Path, uid, gid)
fakeAppImage.AddPreviousLayer("sha256:"+localReusableLayerSha, "")
fakeAppImage.AddPreviousLayer("sha256:"+launcherSHA, "")
fakeAppImage.AddPreviousLayer("sha256:orig-launch-layer-no-local-dir-sha", "")
h.AssertNil(t, json.Unmarshal([]byte(fmt.Sprintf(`
{
"buildpacks": [
{
"key": "buildpack.id",
"layers": {
"launch-layer-no-local-dir": {
"sha": "sha256:orig-launch-layer-no-local-dir-sha",
"data": {
"oldkey": "oldval"
}
}
}
},
{
"key": "other.buildpack.id",
"layers": {
"layer4": {
"sha": "orig-layer4-sha",
"data": {
"layer4key": "layer4val"
}
},
"local-reusable-layer": {
"sha": "sha256:%s"
}
}
}
],
"launcher": {
"sha": "sha256:%s"
}
}`, localReusableLayerSha, launcherSHA)), &opts.OrigMetadata))
})
it("creates app layer on Run image", func() {
h.AssertNil(t, exporter.Export(opts))
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
assertTarFileContents(t, appLayerPath, filepath.Join(opts.AppDir, ".hidden.txt"), "some-hidden-text\n")
assertTarFileOwner(t, appLayerPath, opts.AppDir, uid, gid)
assertLogEntry(t, logHandler, "Adding 1/1 app layer(s)")
})
it("creates config layer on Run image", func() {
h.AssertNil(t, exporter.Export(opts))
configLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "config", "metadata.toml"))
h.AssertNil(t, err)
assertTarFileContents(t,
configLayerPath,
filepath.Join(opts.LayersDir, "config", "metadata.toml"),
"[[processes]]\n type = \"some-process-type\"\n command = \"/some/command\"\n",
)
assertTarFileOwner(t, configLayerPath, filepath.Join(opts.LayersDir, "config"), uid, gid)
assertAddLayerLog(t, logHandler, "config", configLayerPath)
})
it("reuses launcher layer if the sha matches the sha in the metadata", func() {
launcherLayerSHA := h.ComputeSHA256ForPath(t, opts.LauncherConfig.Path, uid, gid)
h.AssertNil(t, exporter.Export(opts))
h.AssertContains(t, fakeAppImage.ReusedLayers(), "sha256:"+launcherLayerSHA)
assertReuseLayerLog(t, logHandler, "launcher", launcherLayerSHA)
})
it("reuses launch layers when only layer.toml is present", func() {
h.AssertNil(t, exporter.Export(opts))
h.AssertContains(t, fakeAppImage.ReusedLayers(), "sha256:orig-launch-layer-no-local-dir-sha")
assertReuseLayerLog(t, logHandler, "buildpack.id:launch-layer-no-local-dir", "orig-launch-layer-no-local-dir-sha")
})
it("reuses cached launch layers if the local sha matches the sha in the metadata", func() {
layer5sha := h.ComputeSHA256ForPath(t, filepath.Join(opts.LayersDir, "other.buildpack.id/local-reusable-layer"), uid, gid)
h.AssertNil(t, exporter.Export(opts))
h.AssertContains(t, fakeAppImage.ReusedLayers(), "sha256:"+layer5sha)
assertReuseLayerLog(t, logHandler, "other.buildpack.id:local-reusable-layer", layer5sha)
})
it("adds new launch layers", func() {
h.AssertNil(t, exporter.Export(opts))
layer2Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/new-launch-layer"))
h.AssertNil(t, err)
assertTarFileContents(t,
layer2Path,
filepath.Join(opts.LayersDir, "buildpack.id/new-launch-layer/file-from-new-launch-layer"),
"echo text from layer 2\n")
assertTarFileOwner(t, layer2Path, filepath.Join(opts.LayersDir, "buildpack.id/new-launch-layer"), uid, gid)
assertAddLayerLog(t, logHandler, "buildpack.id:new-launch-layer", layer2Path)
})
it("adds new launch layers from a second buildpack", func() {
h.AssertNil(t, exporter.Export(opts))
layer3Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "other.buildpack.id/new-launch-layer"))
h.AssertNil(t, err)
assertTarFileContents(t,
layer3Path,
filepath.Join(opts.LayersDir, "other.buildpack.id/new-launch-layer/new-launch-layer-file"),
"echo text from new layer\n")
assertTarFileOwner(t, layer3Path, filepath.Join(opts.LayersDir, "other.buildpack.id/new-launch-layer"), uid, gid)
assertAddLayerLog(t, logHandler, "other.buildpack.id:new-launch-layer", layer3Path)
})
it("only creates expected layers", func() {
h.AssertNil(t, exporter.Export(opts))
var applayer, configLayer, layer2, layer3 = 1, 1, 1, 1
h.AssertEq(t, fakeAppImage.NumberOfAddedLayers(), applayer+configLayer+layer2+layer3)
})
it("only reuses expected layers", func() {
h.AssertNil(t, exporter.Export(opts))
var launcherLayer, layer1, layer5 = 1, 1, 1
h.AssertEq(t, len(fakeAppImage.ReusedLayers()), launcherLayer+layer1+layer5)
})
it("saves lifecycle metadata with layer info", func() {
h.AssertNil(t, exporter.Export(opts))
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
appLayerSHA := h.ComputeSHA256ForFile(t, appLayerPath)
configLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "config", "metadata.toml"))
h.AssertNil(t, err)
configLayerSHA := h.ComputeSHA256ForFile(t, configLayerPath)
newLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/new-launch-layer"))
h.AssertNil(t, err)
newLayerSHA := h.ComputeSHA256ForFile(t, newLayerPath)
secondBPLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "other.buildpack.id/new-launch-layer"))
h.AssertNil(t, err)
secondBPLayerPathSHA := h.ComputeSHA256ForFile(t, secondBPLayerPath)
metadataJSON, err := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertNil(t, err)
var meta lifecycle.LayersMetadata
if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
t.Log("adds run image metadata to label")
h.AssertEq(t, meta.RunImage.TopLayer, "some-top-layer-sha")
h.AssertEq(t, meta.RunImage.Reference, "run-image-reference")
t.Log("adds layer shas to metadata label")
h.AssertEq(t, meta.App[0].SHA, "sha256:"+appLayerSHA)
h.AssertEq(t, meta.Config.SHA, "sha256:"+configLayerSHA)
h.AssertEq(t, meta.Buildpacks[0].ID, "buildpack.id")
h.AssertEq(t, meta.Buildpacks[0].Version, "1.2.3")
h.AssertEq(t, meta.Buildpacks[0].Layers["launch-layer-no-local-dir"].SHA, "sha256:orig-launch-layer-no-local-dir-sha")
h.AssertEq(t, meta.Buildpacks[0].Layers["new-launch-layer"].SHA, "sha256:"+newLayerSHA)
h.AssertEq(t, meta.Buildpacks[1].ID, "other.buildpack.id")
h.AssertEq(t, meta.Buildpacks[1].Version, "4.5.6")
h.AssertEq(t, meta.Buildpacks[1].Layers["new-launch-layer"].SHA, "sha256:"+secondBPLayerPathSHA)
t.Log("adds buildpack layer metadata to label")
h.AssertEq(t, meta.Buildpacks[0].Layers["launch-layer-no-local-dir"].Data, map[string]interface{}{
"mykey": "updated launch-layer-no-local-dir val",
})
h.AssertEq(t, meta.Buildpacks[0].Layers["new-launch-layer"].Data, map[string]interface{}{
"somekey": "someval",
})
h.AssertEq(t, meta.Buildpacks[1].Layers["local-reusable-layer"].Data, map[string]interface{}{
"mykey": "updated locally reusable layer metadata val",
})
})
it("saves run image metadata to the resulting image", func() {
opts.Stack = lifecycle.StackMetadata{
RunImage: lifecycle.StackRunImageMetadata{
Image: "some/run",
Mirrors: []string{"registry.example.com/some/run", "other.example.com/some/run"},
},
}
h.AssertNil(t, exporter.Export(opts))
metadataJSON, err := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertNil(t, err)
var meta lifecycle.LayersMetadata
if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
h.AssertNil(t, err)
h.AssertEq(t, meta.Stack.RunImage.Image, "some/run")
h.AssertEq(t, meta.Stack.RunImage.Mirrors, []string{"registry.example.com/some/run", "other.example.com/some/run"})
})
when("metadata.toml is missing", func() {
it("errors", func() {
})
})
when("metadata.toml is missing bom and has empty process list", func() {
it.Before(func() {
err := ioutil.WriteFile(filepath.Join(opts.LayersDir, "config", "metadata.toml"), []byte(`
processes = []
[[buildpacks]]
id = "buildpack.id"
version = "1.2.3"
[[buildpacks]]
id = "other.buildpack.id"
version = "4.5.6"
`),
os.ModePerm,
)
h.AssertNil(t, err)
})
it("BOM is null and processes is an empty array in the label", func() {
h.AssertNil(t, exporter.Export(opts))
metadataJSON, err := fakeAppImage.Label("io.buildpacks.build.metadata")
h.AssertNil(t, err)
expectedJSON := `
{
"bom": null,
"buildpacks": [
{
"id": "buildpack.id",
"version": "1.2.3"
},
{
"id": "other.buildpack.id",
"version": "4.5.6"
}
],
"launcher": {
"version": "1.2.3",
"source": {
"git": {
"repository": "github.com/buildpacks/lifecycle",
"commit": "asdf1234"
}
}
},
"processes": []
}
`
h.AssertJSONEq(t, expectedJSON, metadataJSON)
})
})
when("there is a complete metadata.toml", func() {
it.Before(func() {
err := ioutil.WriteFile(filepath.Join(opts.LayersDir, "config", "metadata.toml"), []byte(`
[[processes]]
type = "web"
direct = true
command = "/web/command"
args = ["web", "command", "args"]
[[processes]]
type = "worker"
direct = false
command = "/worker/command"
args = ["worker", "command", "args"]
[[buildpacks]]
id = "buildpack.id"
version = "1.2.3"
[[buildpacks]]
id = "other.buildpack.id"
version = "4.5.6"
[[bom]]
name = "Spring Auto-reconfiguration"
version = "2.7.0"
[bom.metadata]
sha256 = "0d524877db7344ec34620f7e46254053568292f5ce514f74e3a0e9b2dbfc338b"
stacks = ["io.buildpacks.stacks.bionic", "org.cloudfoundry.stacks.cflinuxfs3"]
uri = "https://example.com"
[bom.buildpack]
id = "buildpack.id"
version = "1.2.3"
[[bom.metadata.licenses]]
type = "Apache-2.0"
`),
os.ModePerm,
)
h.AssertNil(t, err)
})
it("combines metadata.toml with launcher config to create build label", func() {
h.AssertNil(t, exporter.Export(opts))
metadataJSON, err := fakeAppImage.Label("io.buildpacks.build.metadata")
h.AssertNil(t, err)
expectedJSON := `{
"bom": [
{
"name": "Spring Auto-reconfiguration",
"version": "2.7.0",
"buildpack": {
"id": "buildpack.id",
"version": "1.2.3"
},
"metadata": {
"licenses": [
{
"type": "Apache-2.0"
}
],
"sha256": "0d524877db7344ec34620f7e46254053568292f5ce514f74e3a0e9b2dbfc338b",
"stacks": [
"io.buildpacks.stacks.bionic",
"org.cloudfoundry.stacks.cflinuxfs3"
],
"uri": "https://example.com"
}
}
],
"buildpacks": [
{
"id": "buildpack.id",
"version": "1.2.3"
},
{
"id": "other.buildpack.id",
"version": "4.5.6"
}
],
"launcher": {
"version": "1.2.3",
"source": {
"git": {
"repository": "github.com/buildpacks/lifecycle",
"commit": "asdf1234"
}
}
},
"processes": [
{
"type": "web",
"direct": true,
"command": "/web/command",
"args": ["web", "command", "args"]
},
{
"type": "worker",
"direct": false,
"command": "/worker/command",
"args": ["worker", "command", "args"]
}
]
}
`
h.AssertJSONEq(t, expectedJSON, metadataJSON)
})
})
when("there is project metadata", func() {
it("saves metadata with project info", func() {
opts.Project = lifecycle.ProjectMetadata{
Source: &lifecycle.ProjectSource{
Type: "git",
Version: map[string]interface{}{
"commit": "abcd1234",
},
Metadata: map[string]interface{}{
"repository": "github.com/buildpack/lifecycle",
"branch": "master",
},
}}
h.AssertNil(t, exporter.Export(opts))
projectJSON, err := fakeAppImage.Label("io.buildpacks.project.metadata")
h.AssertNil(t, err)
var projectMD lifecycle.ProjectMetadata
if err := json.Unmarshal([]byte(projectJSON), &projectMD); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
t.Log("adds project metadata to label")
h.AssertEq(t, projectMD, opts.Project)
})
})
it("sets CNB_LAYERS_DIR", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := fakeAppImage.Env("CNB_LAYERS_DIR")
h.AssertNil(t, err)
h.AssertEq(t, val, opts.LayersDir)
})
it("sets CNB_APP_DIR", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := opts.WorkingImage.Env("CNB_APP_DIR")
h.AssertNil(t, err)
h.AssertEq(t, val, opts.AppDir)
})
it("sets ENTRYPOINT to launcher", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := fakeAppImage.Entrypoint()
h.AssertNil(t, err)
h.AssertEq(t, val, []string{opts.LauncherConfig.Path})
})
it("sets empty CMD", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := fakeAppImage.Cmd()
h.AssertNil(t, err)
h.AssertEq(t, val, []string(nil))
})
it("saves run image", func() {
h.AssertNil(t, exporter.Export(opts))
h.AssertEq(t, fakeAppImage.IsSaved(), true)
})
when("image has a digest identifier", func() {
var fakeRemoteDigest = "sha256:c27a27006b74a056bed5d9edcebc394783880abe8691a8c87c78b7cffa6fa5ad"
it.Before(func() {
digestRef, err := name.NewDigest("some-repo/app-image@" + fakeRemoteDigest)
h.AssertNil(t, err)
fakeAppImage.SetIdentifier(remote.DigestIdentifier{
Digest: digestRef,
})
})
it("outputs the digest", func() {
h.AssertNil(t, exporter.Export(opts))
assertLogEntry(t, logHandler, `*** Digest: `+fakeRemoteDigest)
})
})
when("image has an ID identifier", func() {
it("outputs the image ID", func() {
h.AssertNil(t, exporter.Export(opts))
assertLogEntry(t, logHandler, `*** Image ID: some-image-id`)
})
})
it("outputs image names", func() {
h.AssertNil(t, exporter.Export(opts))
assertLogEntry(t, logHandler, `*** Images (some-image-i):`)
assertLogEntry(t, logHandler, fakeAppImage.Name())
assertLogEntry(t, logHandler, opts.AdditionalNames[0])
assertLogEntry(t, logHandler, opts.AdditionalNames[1])
})
when("one of the additional names fails", func() {
it("outputs identifier and image name with error", func() {
failingName := "not.a.tag@reference"
opts.AdditionalNames = append(opts.AdditionalNames, failingName)
err := exporter.Export(opts)
h.AssertError(t, err, fmt.Sprintf("failed to write image to the following tags: [%s:", failingName))
assertLogEntry(t, logHandler, `*** Images (some-image-i):`)
assertLogEntry(t, logHandler, fakeAppImage.Name())
assertLogEntry(t, logHandler, opts.AdditionalNames[0])
assertLogEntry(t, logHandler, opts.AdditionalNames[1])
assertLogEntry(t, logHandler, fmt.Sprintf("%s - could not parse reference", failingName))
})
})
when("previous image metadata is missing buildpack for reused layer", func() {
it.Before(func() {
opts.OrigMetadata = lifecycle.LayersMetadata{
Buildpacks: []lifecycle.BuildpackLayersMetadata{{}},
}
})
it("returns an error", func() {
h.AssertError(
t,
exporter.Export(opts),
"cannot reuse 'buildpack.id:launch-layer-no-local-dir', previous image has no metadata for layer 'buildpack.id:launch-layer-no-local-dir'",
)
})
})
when("previous image metadata is missing reused layer", func() {
it.Before(func() {
opts.OrigMetadata = lifecycle.LayersMetadata{
Buildpacks: []lifecycle.BuildpackLayersMetadata{{
ID: "buildpack.id",
Layers: map[string]lifecycle.BuildpackLayerMetadata{},
}},
}
})
it("returns an error", func() {
h.AssertError(
t,
exporter.Export(opts),
"cannot reuse 'buildpack.id:launch-layer-no-local-dir', previous image has no metadata for layer 'buildpack.id:launch-layer-no-local-dir'",
)
})
})
it("saves the image for all provided AdditionalNames", func() {
h.AssertNil(t, exporter.Export(opts))
h.AssertContains(t, fakeAppImage.SavedNames(), append(opts.AdditionalNames, fakeAppImage.Name())...)
})
})
when("previous slice image doesn't exist", func() {
var (
nonExistingOriginalImage *fakes.Image
)
it.Before(func() {
h.RecursiveCopy(t, filepath.Join("testdata", "exporter", "app-slices", "layers"), opts.LayersDir)
var err error
opts.AppDir, err = filepath.Abs(filepath.Join(opts.LayersDir, "app"))
h.AssertNil(t, err)
// TODO : this is an hacky way to create a non-existing image and should be improved in imgutil
nonExistingOriginalImage = fakes.NewImage("app/original-image", "", nil)
nonExistingOriginalImage.Delete()
})
it.After(func() {
nonExistingOriginalImage.Cleanup()
})
it("create a slice layer on the Run image", func() {
h.AssertNil(t, exporter.Export(opts))
sliceLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, "static", "assets", "config.txt"))
h.AssertNil(t, err)
assertTarFileExists(t, sliceLayerPath, filepath.Join(opts.AppDir, "static", "assets", "config.txt"), true)
assertTarFileExists(t, sliceLayerPath, filepath.Join(opts.AppDir, "static", "assets", "logo.svg"), true)
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, "static", "assets", "config.txt"), false)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, "static", "assets", "logo.svg"), false)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, "static", "misc", "resources"), false)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, "test_app.sh"), true)
assertTarFileExists(t, appLayerPath, filepath.Join(opts.AppDir, ".hidden.txt"), true)
assertLogEntry(t, logHandler, "Adding 4/4 app layer(s)")
})
})
when("previous image doesn't exist", func() {
var (
nonExistingOriginalImage *fakes.Image
)
it.Before(func() {
h.RecursiveCopy(t, filepath.Join("testdata", "exporter", "previous-image-not-exist", "layers"), opts.LayersDir)
var err error
opts.AppDir, err = filepath.Abs(filepath.Join("testdata", "exporter", "previous-image-not-exist", "layers", "app"))
h.AssertNil(t, err)
// TODO : this is an hacky way to create a non-existing image and should be improved in imgutil
nonExistingOriginalImage = fakes.NewImage("app/original-image", "", nil)
nonExistingOriginalImage.Delete()
})
it.After(func() {
nonExistingOriginalImage.Cleanup()
})
it("creates app layer on Run image", func() {
h.AssertNil(t, exporter.Export(opts))
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
assertTarFileContents(t, appLayerPath, filepath.Join(opts.AppDir, ".hidden.txt"), "some-hidden-text\n")
assertTarFileOwner(t, appLayerPath, opts.AppDir, uid, gid)
assertLogEntry(t, logHandler, "Adding 1/1 app layer(s)")
})
when("app dir is relative", func() {
it("creates app layer on Run image", func() {
cwd, err := os.Getwd()
h.AssertNil(t, err)
fullAppDir := opts.AppDir
opts.AppDir, err = filepath.Rel(cwd, opts.AppDir)
h.AssertNil(t, err)
h.AssertNil(t, exporter.Export(opts))
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(fullAppDir, ".hidden.txt"))
h.AssertNil(t, err)
assertTarFileContents(t, appLayerPath, filepath.Join(fullAppDir, ".hidden.txt"), "some-hidden-text\n")
assertTarFileOwner(t, appLayerPath, fullAppDir, uid, gid)
assertLogEntry(t, logHandler, "Adding 1/1 app layer(s)")
})
})
it("creates config layer on Run image", func() {
h.AssertNil(t, exporter.Export(opts))
configLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "config", "metadata.toml"))
h.AssertNil(t, err)
assertTarFileContents(t,
configLayerPath,
filepath.Join(opts.LayersDir, "config/metadata.toml"),
"[[processes]]\n type = \"some-process-type\"\n command = \"/some/command\"\n",
)
assertTarFileOwner(t, configLayerPath, filepath.Join(opts.LayersDir, "config"), uid, gid)
assertAddLayerLog(t, logHandler, "config", configLayerPath)
})
it("creates a launcher layer", func() {
h.AssertNil(t, exporter.Export(opts))
launcherLayerPath, err := fakeAppImage.FindLayerWithPath(opts.LauncherConfig.Path)
h.AssertNil(t, err)
assertTarFileContents(t,
launcherLayerPath,
opts.LauncherConfig.Path,
"some-launcher")
assertTarFileOwner(t, launcherLayerPath, opts.LauncherConfig.Path, uid, gid)
assertAddLayerLog(t, logHandler, "launcher", launcherLayerPath)
})
it("adds launch layers", func() {
h.AssertNil(t, exporter.Export(opts))
layer1Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/layer1"))
h.AssertNil(t, err)
assertTarFileContents(t,
layer1Path,
filepath.Join(opts.LayersDir, "buildpack.id/layer1/file-from-layer-1"),
"echo text from layer 1\n")
assertTarFileOwner(t, layer1Path, filepath.Join(opts.LayersDir, "buildpack.id/layer1"), uid, gid)
assertAddLayerLog(t, logHandler, "buildpack.id:layer1", layer1Path)
layer2Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/layer2"))
h.AssertNil(t, err)
assertTarFileContents(t,
layer2Path,
filepath.Join(opts.LayersDir, "buildpack.id/layer2/file-from-layer-2"),
"echo text from layer 2\n")
assertTarFileOwner(t, layer2Path, filepath.Join(opts.LayersDir, "buildpack.id/layer2"), uid, gid)
assertAddLayerLog(t, logHandler, "buildpack.id:layer2", layer2Path)
})
it("only creates expected layers", func() {
h.AssertNil(t, exporter.Export(opts))
var applayer, configLayer, launcherLayer, layer1, layer2 = 1, 1, 1, 1, 1
h.AssertEq(t, fakeAppImage.NumberOfAddedLayers(), applayer+configLayer+launcherLayer+layer1+layer2)
})
it("saves metadata with layer info", func() {
h.AssertNil(t, exporter.Export(opts))
appLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.AppDir, ".hidden.txt"))
h.AssertNil(t, err)
appLayerSHA := h.ComputeSHA256ForFile(t, appLayerPath)
configLayerPath, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "config", "metadata.toml"))
h.AssertNil(t, err)
configLayerSHA := h.ComputeSHA256ForFile(t, configLayerPath)
launcherLayerPath, err := fakeAppImage.FindLayerWithPath(opts.LauncherConfig.Path)
h.AssertNil(t, err)
launcherLayerSHA := h.ComputeSHA256ForFile(t, launcherLayerPath)
layer1Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/layer1"))
h.AssertNil(t, err)
buildpackLayer1SHA := h.ComputeSHA256ForFile(t, layer1Path)
layer2Path, err := fakeAppImage.FindLayerWithPath(filepath.Join(opts.LayersDir, "buildpack.id/layer2"))
h.AssertNil(t, err)
buildpackLayer2SHA := h.ComputeSHA256ForFile(t, layer2Path)
metadataJSON, err := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertNil(t, err)
var meta lifecycle.LayersMetadata
if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
t.Log("adds run image metadata to label")
h.AssertEq(t, meta.RunImage.TopLayer, "some-top-layer-sha")
h.AssertEq(t, meta.RunImage.Reference, "run-image-reference")
t.Log("adds layer shas to metadata label")
h.AssertEq(t, meta.App[0].SHA, "sha256:"+appLayerSHA)
h.AssertEq(t, meta.Config.SHA, "sha256:"+configLayerSHA)
h.AssertEq(t, meta.Launcher.SHA, "sha256:"+launcherLayerSHA)
h.AssertEq(t, meta.Buildpacks[0].ID, "buildpack.id")
h.AssertEq(t, meta.Buildpacks[0].Layers["layer1"].SHA, "sha256:"+buildpackLayer1SHA)
h.AssertEq(t, meta.Buildpacks[0].Layers["layer2"].SHA, "sha256:"+buildpackLayer2SHA)
t.Log("adds buildpack layer metadata to label")
h.AssertEq(t, meta.Buildpacks[0].Layers["layer1"].Data, map[string]interface{}{
"mykey": "new val",
})
t.Log("defaults to nil store")
h.AssertNil(t, meta.Buildpacks[0].Store)
})
when("there are store.toml files", func() {
it.Before(func() {
path := filepath.Join(opts.LayersDir, "buildpack.id", "store.toml")
h.AssertNil(t, ioutil.WriteFile(path, []byte("[metadata]\n key = \"val\""), 0777))
})
it("saves store metadata", func() {
h.AssertNil(t, exporter.Export(opts))
metadataJSON, err := fakeAppImage.Label("io.buildpacks.lifecycle.metadata")
h.AssertNil(t, err)
var meta lifecycle.LayersMetadata
if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
h.AssertEq(t, meta.Buildpacks[0].Store, &lifecycle.BuildpackStore{Data: map[string]interface{}{
"key": "val",
}})
})
})
when("there is project metadata", func() {
it("saves metadata with project info", func() {
opts.Project = lifecycle.ProjectMetadata{
Source: &lifecycle.ProjectSource{
Type: "git",
Version: map[string]interface{}{
"commit": "abcd1234",
},
Metadata: map[string]interface{}{
"repository": "github.com/buildpack/lifecycle",
"branch": "master",
},
}}
h.AssertNil(t, exporter.Export(opts))
projectJSON, err := fakeAppImage.Label("io.buildpacks.project.metadata")
h.AssertNil(t, err)
var projectMD lifecycle.ProjectMetadata
if err := json.Unmarshal([]byte(projectJSON), &projectMD); err != nil {
t.Fatalf("badly formatted metadata: %s", err)
}
t.Log("adds project metadata to label")
h.AssertEq(t, projectMD, opts.Project)
})
})
it("sets CNB_LAYERS_DIR", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := fakeAppImage.Env("CNB_LAYERS_DIR")
h.AssertNil(t, err)
h.AssertEq(t, val, opts.LayersDir)
})
it("sets CNB_APP_DIR", func() {
h.AssertNil(t, exporter.Export(opts))
val, err := fakeAppImage.Env("CNB_APP_DIR")
h.AssertNil(t, err)
h.AssertEq(t, val, opts.AppDir)
})