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build_test.go
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build_test.go
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package packit_test
import (
"errors"
"fmt"
"os"
"path/filepath"
"strings"
"testing"
"testing/iotest"
"github.com/paketo-buildpacks/packit/v2"
"github.com/paketo-buildpacks/packit/v2/fakes"
"github.com/sclevine/spec"
. "github.com/onsi/gomega"
. "github.com/paketo-buildpacks/packit/v2/matchers"
)
func testBuild(t *testing.T, context spec.G, it spec.S) {
var (
Expect = NewWithT(t).Expect
workingDir string
platformDir string
tmpDir string
layersDir string
planPath string
cnbDir string
envCnbDir string
binaryPath string
exitHandler *fakes.ExitHandler
)
it.Before(func() {
var err error
workingDir, err = os.Getwd()
Expect(err).NotTo(HaveOccurred())
tmpDir, err = os.MkdirTemp("", "working-dir")
Expect(err).NotTo(HaveOccurred())
tmpDir, err = filepath.EvalSymlinks(tmpDir)
Expect(err).NotTo(HaveOccurred())
Expect(os.Chdir(tmpDir)).To(Succeed())
layersDir, err = os.MkdirTemp("", "layers")
Expect(err).NotTo(HaveOccurred())
platformDir, err = os.MkdirTemp("", "platform")
Expect(err).NotTo(HaveOccurred())
file, err := os.CreateTemp("", "plan.toml")
Expect(err).NotTo(HaveOccurred())
defer file.Close()
_, err = file.WriteString(`
[[entries]]
name = "some-entry"
[entries.metadata]
version = "some-version"
some-key = "some-value"
`)
Expect(err).NotTo(HaveOccurred())
planPath = file.Name()
cnbDir, err = os.MkdirTemp("", "cnb")
Expect(err).NotTo(HaveOccurred())
envCnbDir, err = os.MkdirTemp("", "envCnb")
Expect(err).NotTo(HaveOccurred())
bpTOML := []byte(`
api = "0.7"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
homepage = "some-homepage"
description = "some-description"
keywords = ["some-keyword"]
sbom-formats = ["some-sbom-format", "some-other-sbom-format"]
clear-env = false
[[buildpack.licenses]]
type = "some-license-type"
uri = "some-license-uri"
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
binaryPath = filepath.Join(cnbDir, "bin", "build")
Expect(os.Setenv("CNB_STACK_ID", "some-stack")).To(Succeed())
exitHandler = &fakes.ExitHandler{}
})
it.After(func() {
Expect(os.Unsetenv("CNB_STACK_ID")).To(Succeed())
Expect(os.Chdir(workingDir)).To(Succeed())
Expect(os.RemoveAll(tmpDir)).To(Succeed())
Expect(os.RemoveAll(layersDir)).To(Succeed())
Expect(os.RemoveAll(platformDir)).To(Succeed())
})
it("provides the build context to the given BuildFunc", func() {
var context packit.BuildContext
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
context = ctx
return packit.BuildResult{}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
Expect(context).To(Equal(packit.BuildContext{
CNBPath: cnbDir,
Stack: "some-stack",
Platform: packit.Platform{
Path: platformDir,
},
WorkingDir: tmpDir,
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "some-entry",
Metadata: map[string]interface{}{
"version": "some-version",
"some-key": "some-value",
},
},
},
},
Layers: packit.Layers{
Path: layersDir,
},
BuildpackInfo: packit.BuildpackInfo{
ID: "some-id",
Name: "some-name",
Version: "some-version",
Homepage: "some-homepage",
Description: "some-description",
Keywords: []string{"some-keyword"},
SBOMFormats: []string{"some-sbom-format", "some-other-sbom-format"},
Licenses: []packit.BuildpackInfoLicense{
{
Type: "some-license-type",
URI: "some-license-uri",
},
},
},
}))
})
context("when there are updates to the build plan", func() {
context("when the api version is less than 0.5", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.4"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("updates the buildpack plan.toml with any changes", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
ctx.Plan.Entries[0].Metadata["other-key"] = "other-value"
return packit.BuildResult{
Plan: ctx.Plan,
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(planPath)
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[entries]]
name = "some-entry"
[entries.metadata]
version = "some-version"
some-key = "some-value"
other-key = "other-value"
`))
})
})
context("when the api version is greater or equal to 0.5", func() {
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Plan: ctx.Plan,
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("buildpack plan is read only")))
})
})
})
it("persists layer metadata", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
layerPath := filepath.Join(ctx.Layers.Path, "some-layer")
Expect(os.MkdirAll(layerPath, os.ModePerm)).To(Succeed())
return packit.BuildResult{
Layers: []packit.Layer{
packit.Layer{
Path: layerPath,
Name: "some-layer",
Build: true,
Launch: true,
Cache: true,
Metadata: map[string]interface{}{
"some-key": "some-value",
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "some-layer.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[types]
launch = true
build = true
cache = true
[metadata]
some-key = "some-value"
`))
})
context("when the buildpack api version is less than 0.6", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.5"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("persists layer metadata", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
layerPath := filepath.Join(ctx.Layers.Path, "some-layer")
Expect(os.MkdirAll(layerPath, os.ModePerm)).To(Succeed())
return packit.BuildResult{
Layers: []packit.Layer{
packit.Layer{
Path: layerPath,
Name: "some-layer",
Build: true,
Launch: true,
Cache: true,
Metadata: map[string]interface{}{
"some-key": "some-value",
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "some-layer.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
launch = true
build = true
cache = true
[metadata]
some-key = "some-value"
`))
})
})
context("when there are sbom entries in layer metadata", func() {
it("writes them to their specified locations", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
layerPath := filepath.Join(ctx.Layers.Path, "some-layer")
Expect(os.MkdirAll(layerPath, os.ModePerm)).To(Succeed())
return packit.BuildResult{
Layers: []packit.Layer{
packit.Layer{
Path: layerPath,
Name: "some-layer",
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
{
Extension: "other.yml",
Content: strings.NewReader(`other-key: other-value`),
},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "some-layer.sbom.some.json"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchJSON(`{"some-key": "some-value"}`))
contents, err = os.ReadFile(filepath.Join(layersDir, "some-layer.sbom.other.yml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchYAML(`other-key: other-value`))
})
context("when the api version is less than 0.7", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.6"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
layerPath := filepath.Join(ctx.Layers.Path, "some-layer")
Expect(os.MkdirAll(layerPath, os.ModePerm)).To(Succeed())
return packit.BuildResult{
Layers: []packit.Layer{
packit.Layer{
Path: layerPath,
Name: "some-layer",
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("some-layer.sbom.* output is only supported with Buildpack API v0.7 or higher")))
})
})
})
context("when there are existing layer.toml files", func() {
context("when the layer.toml's will not be re-written", func() {
var obsoleteLayerPath string
it.Before(func() {
obsoleteLayerPath = filepath.Join(layersDir, "obsolete-layer")
Expect(os.MkdirAll(obsoleteLayerPath, os.ModePerm)).To(Succeed())
Expect(os.WriteFile(obsoleteLayerPath+".toml", []byte{}, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(layersDir, "launch.toml"), []byte{}, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(layersDir, "store.toml"), []byte{}, 0600)).To(Succeed())
})
context("when the buildpack api version is less than 0.6", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.5"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("removes them", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Layers: []packit.Layer{},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
Expect(obsoleteLayerPath).NotTo(BeARegularFile())
Expect(obsoleteLayerPath + ".toml").NotTo(BeARegularFile())
Expect(filepath.Join(layersDir, "launch.toml")).To(BeARegularFile())
Expect(filepath.Join(layersDir, "store.toml")).To(BeARegularFile())
})
context("failures", func() {
context("when getting the layer toml list", func() {
var unremovableTOMLPath string
it.Before(func() {
unremovableTOMLPath = filepath.Join(layersDir, "unremovable.toml")
Expect(os.MkdirAll(filepath.Join(layersDir, "unremovable"), os.ModePerm)).To(Succeed())
Expect(os.WriteFile(unremovableTOMLPath, []byte{}, os.ModePerm)).To(Succeed())
Expect(os.Chmod(layersDir, 0666)).To(Succeed())
})
it.After(func() {
Expect(os.Chmod(layersDir, os.ModePerm)).To(Succeed())
})
it("returns an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Layers: []packit.Layer{},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("failed to remove layer toml:")))
})
})
})
})
context("when the buildpack api version is greater than or equal to 0.6", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.6"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("leaves them in place", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Layers: []packit.Layer{},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
Expect(obsoleteLayerPath).To(BeADirectory())
Expect(obsoleteLayerPath + ".toml").To(BeARegularFile())
Expect(filepath.Join(layersDir, "launch.toml")).To(BeARegularFile())
Expect(filepath.Join(layersDir, "store.toml")).To(BeARegularFile())
})
})
})
})
context("when the CNB_BUILDPACK_DIR environment variable is set", func() {
it.Before(func() {
os.Setenv("CNB_BUILDPACK_DIR", envCnbDir)
})
it.After(func() {
os.Unsetenv("CNB_BUILDPACK_DIR")
})
it("sets the correct value for CNBdir in the Build context", func() {
var context packit.BuildContext
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
context = ctx
return packit.BuildResult{}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
Expect(context).To(Equal(packit.BuildContext{
CNBPath: envCnbDir,
Platform: packit.Platform{
Path: platformDir,
},
Stack: "some-stack",
WorkingDir: tmpDir,
Plan: packit.BuildpackPlan{
Entries: []packit.BuildpackPlanEntry{
{
Name: "some-entry",
Metadata: map[string]interface{}{
"version": "some-version",
"some-key": "some-value",
},
},
},
},
Layers: packit.Layers{
Path: layersDir,
},
BuildpackInfo: packit.BuildpackInfo{
ID: "some-id",
Name: "some-name",
Version: "some-version",
Homepage: "some-homepage",
Description: "some-description",
Keywords: []string{"some-keyword"},
SBOMFormats: []string{"some-sbom-format", "some-other-sbom-format"},
Licenses: []packit.BuildpackInfoLicense{
{
Type: "some-license-type",
URI: "some-license-uri",
},
},
},
}))
})
})
context("when there are sbom entries in the build metadata", func() {
it("writes them to their specified locations", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
{
Extension: "other.yml",
Content: strings.NewReader(`other-key: other-value`),
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "build.sbom.some.json"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchJSON(`{"some-key": "some-value"}`))
contents, err = os.ReadFile(filepath.Join(layersDir, "build.sbom.other.yml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchYAML(`other-key: other-value`))
})
context("when the api version is less than 0.7", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.6"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("build.sbom.* output is only supported with Buildpack API v0.7 or higher")))
})
})
})
context("when there are bom entries in the build metadata", func() {
it("persists a build.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
BOM: []packit.BOMEntry{
{
Name: "example",
},
{
Name: "another-example",
Metadata: map[string]string{
"some-key": "some-value",
},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "build.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[bom]]
name = "example"
[[bom]]
name = "another-example"
[bom.metadata]
some-key = "some-value"
`))
})
context("when the api version is less than 0.5", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.4"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
BOM: []packit.BOMEntry{
{
Name: "example",
},
{
Name: "another-example",
Metadata: map[string]string{
"some-key": "some-value",
},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("build.toml is only supported with Buildpack API v0.5 or higher")))
})
})
})
context("when there are unmet entries in the build metadata", func() {
it("persists a build.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
Unmet: []packit.UnmetEntry{
{
Name: "example",
},
{
Name: "another-example",
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "build.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[unmet]]
name = "example"
[[unmet]]
name = "another-example"
`))
})
context("when the api version is less than 0.5", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.4"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Build: packit.BuildMetadata{
Unmet: []packit.UnmetEntry{
{
Name: "example",
},
{
Name: "another-example",
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("build.toml is only supported with Buildpack API v0.5 or higher")))
})
})
})
context("when there are sbom entries in the launch metadata", func() {
it("writes them to their specified locations", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
{
Extension: "other.yml",
Content: strings.NewReader(`other-key: other-value`),
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.sbom.some.json"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchJSON(`{"some-key": "some-value"}`))
contents, err = os.ReadFile(filepath.Join(layersDir, "launch.sbom.other.yml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchYAML(`other-key: other-value`))
})
context("when the api version is less than 0.7", func() {
it.Before(func() {
bpTOML := []byte(`
api = "0.6"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`)
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(envCnbDir, "buildpack.toml"), bpTOML, 0600)).To(Succeed())
})
it("throws an error", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
SBOM: packit.SBOMFormats{
{
Extension: "some.json",
Content: strings.NewReader(`{"some-key": "some-value"}`),
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("launch.sbom.* output is only supported with Buildpack API v0.7 or higher")))
})
})
})
context("when there are bom entries in the launch metadata", func() {
it("persists a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
BOM: []packit.BOMEntry{
{
Name: "example",
},
{
Name: "another-example",
Metadata: map[string]string{
"some-key": "some-value",
},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[bom]]
name = "example"
[[bom]]
name = "another-example"
[bom.metadata]
some-key = "some-value"
`))
})
})
context("when there are processes in the result", func() {
it("persists a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
Processes: []packit.Process{
{
Type: "some-type",
Command: "some-command",
Args: []string{"some-arg"},
Direct: true,
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[processes]]
type = "some-type"
command = "some-command"
args = ["some-arg"]
direct = true
`))
})
context("when the process is the default", func() {
it("persists a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
Processes: []packit.Process{
{
Type: "some-type",
Command: "some-command",
Args: []string{"some-arg"},
Direct: true,
Default: true,
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[processes]]
type = "some-type"
command = "some-command"
args = ["some-arg"]
direct = true
default = true
`))
})
})
context("when the api version is less than 0.6", func() {
it.Before(func() {
Expect(os.WriteFile(filepath.Join(cnbDir, "buildpack.toml"), []byte(`
api = "0.5"
[buildpack]
id = "some-id"
name = "some-name"
version = "some-version"
clear-env = false
`), 0600)).To(Succeed())
})
it("errors", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
Processes: []packit.Process{
{
Type: "some-type",
Command: "some-command",
Args: []string{"some-arg"},
Direct: true,
Default: true,
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}), packit.WithExitHandler(exitHandler))
Expect(exitHandler.ErrorCall.Receives.Error).To(MatchError(ContainSubstring("processes can only be marked as default with Buildpack API v0.6 or higher")))
})
})
})
context("when there are slices in the result", func() {
it("persists a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
Slices: []packit.Slice{
{
Paths: []string{"some-slice"},
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[slices]]
paths = ["some-slice"]
`))
})
})
context("when there are labels in the result", func() {
it("persists a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Launch: packit.LaunchMetadata{
Labels: map[string]string{
"some key": "some value",
"some-other-key": "some-other-value",
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
contents, err := os.ReadFile(filepath.Join(layersDir, "launch.toml"))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(MatchTOML(`
[[labels]]
key = "some key"
value = "some value"
[[labels]]
key = "some-other-key"
value = "some-other-value"
`))
})
})
context("when there are no processes, slices, bom or labels in the result", func() {
it("does not persist a launch.toml", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
Expect(filepath.Join(layersDir, "launch.toml")).NotTo(BeARegularFile())
})
})
context("persists env vars", func() {
context("writes to shared env folder", func() {
it("writes env vars into env directory", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Layers: []packit.Layer{
{
Path: filepath.Join(ctx.Layers.Path, "some-layer"),
SharedEnv: packit.Environment{
"SOME_VAR.append": "append-value",
"SOME_VAR.default": "default-value",
"SOME_VAR.delim": "delim-value",
"SOME_VAR.prepend": "prepend-value",
"SOME_VAR.override": "override-value",
},
},
},
}, nil
}, packit.WithArgs([]string{binaryPath, layersDir, platformDir, planPath}))
for _, modifier := range []string{"append", "default", "delim", "prepend", "override"} {
contents, err := os.ReadFile(filepath.Join(layersDir, "some-layer", "env", fmt.Sprintf("SOME_VAR.%s", modifier)))
Expect(err).NotTo(HaveOccurred())
Expect(string(contents)).To(Equal(fmt.Sprintf("%s-value", modifier)))
}
})
})
context("writes to launch folder", func() {
it("writes env vars into env.launch directory", func() {
packit.Build(func(ctx packit.BuildContext) (packit.BuildResult, error) {
return packit.BuildResult{
Layers: []packit.Layer{
{
Path: filepath.Join(ctx.Layers.Path, "some-layer"),
LaunchEnv: packit.Environment{
"SOME_VAR.append": "append-value",