feat:scaffolding-go

Author: gauron99

cmd/func-util/main.go

@@ -97,31 +97,38 @@ func scaffold(ctx context.Context) error {
 	}
 
 	appRoot := filepath.Join(f.Root, ".s2i", "builds", "last")
+	if f.Build.Builder != "s2i" {
+		// TODO: gauron99 - change this completely
+		// non-s2i override
+		appRoot = filepath.Join(f.Root, ".func", "builds", "last")
+	}
+	fmt.Printf("appRoot is '%s'\n", appRoot)
 	_ = os.RemoveAll(appRoot)
 
+	// build step now includes scaffolding for go-pack
 	err = scaffolding.Write(appRoot, f.Root, f.Runtime, f.Invoke, embeddedRepo.FS())
 	if err != nil {
 		return fmt.Errorf("cannot write the scaffolding: %w", err)
 	}
 
-	if err := os.MkdirAll(filepath.Join(f.Root, ".s2i", "bin"), 0755); err != nil {
-		return fmt.Errorf("unable to create .s2i bin dir. %w", err)
-	}
-
-	var asm string
-	switch f.Runtime {
-	case "go":
-		asm = s2i.GoAssembler
-	case "python":
-		asm = s2i.PythonAssembler
-	default:
-		panic("unreachable")
-	}
+	if f.Build.Builder == "s2i" {
+		if err := os.MkdirAll(filepath.Join(f.Root, ".s2i", "bin"), 0755); err != nil {
+			return fmt.Errorf("unable to create .s2i bin dir. %w", err)
+		}
+		var asm string
+		switch f.Runtime {
+		case "go":
+			asm = s2i.GoAssembler
+		case "python":
+			asm = s2i.PythonAssembler
+		default:
+			panic("unreachable")
+		}
 
-	if err := os.WriteFile(filepath.Join(f.Root, ".s2i", "bin", "assemble"), []byte(asm), 0755); err != nil {
-		return fmt.Errorf("unable to write go assembler. %w", err)
+		if err := os.WriteFile(filepath.Join(f.Root, ".s2i", "bin", "assemble"), []byte(asm), 0755); err != nil {
+			return fmt.Errorf("unable to write go assembler. %w", err)
+		}
 	}
-
 	return nil
 }
 

generate/zz_filesystem_generated.go

@@ -23,13 +23,14 @@ import (
 	"knative.dev/func/pkg/builders"
 	"knative.dev/func/pkg/docker"
 	fn "knative.dev/func/pkg/functions"
+	"knative.dev/func/pkg/scaffolding"
 )
 
 // DefaultName when no WithName option is provided to NewBuilder
 const DefaultName = builders.Pack
 
-var DefaultBaseBuilder = "ghcr.io/knative/builder-jammy-base:latest"
-var DefaultTinyBuilder = "ghcr.io/knative/builder-jammy-tiny:latest"
+var DefaultBaseBuilder = "quay.io/dfridric/knative/builder-jammy-base:latest"
+var DefaultTinyBuilder = "quay.io/dfridric/knative/builder-jammy-tiny:latest"
 
 var (
 	DefaultBuilderImages = map[string]string{
@@ -46,6 +47,7 @@ var (
 	// Ensure that all entries in this list are terminated with a trailing "/"
 	// See GHSA-5336-2g3f-9g3m for details
 	trustedBuilderImagePrefixes = []string{
+		"quay.io/dfridric/",
 		"quay.io/boson/",
 		"gcr.io/paketo-buildpacks/",
 		"docker.io/paketobuildpacks/",
@@ -116,7 +118,7 @@ func WithTimestamp(v bool) Option {
 	}
 }
 
-var DefaultLifecycleImage = "docker.io/buildpacksio/lifecycle:553c041"
+var DefaultLifecycleImage = "docker.io/buildpacksio/lifecycle:3659764"
 
 // Build the Function at path.
 func (b *Builder) Build(ctx context.Context, f fn.Function, platforms []fn.Platform) (err error) {
@@ -171,6 +173,16 @@ func (b *Builder) Build(ctx context.Context, f fn.Function, platforms []fn.Platf
 			Volumes []string
 		}{Network: "", Volumes: nil},
 	}
+
+	// NOTE: gauron99 - this might be even created into a Client function and
+	// ran before the client.Build() all together (in the CLI). There are gonna
+	// be commonalitites across the builders for scaffolding with some nuances
+	// which could be handled by each "scaffolder" - similarly to builders.
+	// scaffold
+	if err = scaffold(f); err != nil {
+		return
+	}
+
 	if b.withTimestamp {
 		now := time.Now()
 		opts.CreationTime = &now
@@ -186,6 +198,12 @@ func (b *Builder) Build(ctx context.Context, f fn.Function, platforms []fn.Platf
 		opts.Env["BPE_DEFAULT_LISTEN_ADDRESS"] = "[::]:8080"
 	}
 
+	// go specific workdir set to where main is
+	if f.Runtime == "go" {
+		if _, ok := opts.Env["BP_GO_WORKDIR"]; !ok {
+			opts.Env["BP_GO_WORKDIR"] = ".func/builds/last"
+		}
+	}
 	var bindings = make([]string, 0, len(f.Build.Mounts))
 	for _, m := range f.Build.Mounts {
 		bindings = append(bindings, fmt.Sprintf("%s:%s", m.Source, m.Destination))
@@ -312,3 +330,32 @@ type ErrRuntimeNotSupported struct {
 func (e ErrRuntimeNotSupported) Error() string {
 	return fmt.Sprintf("Pack builder has no default builder image for the '%v' language runtime.  Please provide one.", e.Runtime)
 }
+
+// TODO: gauron99 - unify this with other builders; temporary for the go pack
+//
+// scaffold the project
+func scaffold(f fn.Function) error {
+	// Scafffolding is currently only supported by the Go runtime
+	// Python currently uses an injector instead of this
+	if f.Runtime != "go" {
+		return nil
+	}
+
+	contextDir := filepath.Join(".func", "builds", "last")
+	appRoot := filepath.Join(f.Root, contextDir)
+	_ = os.RemoveAll(appRoot)
+
+	// The embedded repository contains the scaffolding code itself which glues
+	// together the middleware and a function via main
+	embeddedRepo, err := fn.NewRepository("", "") // default is the embedded fs
+	if err != nil {
+		return fmt.Errorf("unable to load the embedded scaffolding. %w", err)
+	}
+
+	// Write scaffolding to .func/builds/last
+	err = scaffolding.Write(appRoot, f.Root, f.Runtime, f.Invoke, embeddedRepo.FS())
+	if err != nil {
+		return fmt.Errorf("unable to build due to a scaffold error. %w", err)
+	}
+	return nil
+}

pkg/builders/buildpacks/builder.go

@@ -86,11 +86,11 @@ func TestBuild_BuildpacksDefault(t *testing.T) {
 	var (
 		i = &mockImpl{}
 		b = NewBuilder(WithImpl(i))
-		f = fn.Function{Runtime: "go"}
+		f = fn.Function{Runtime: "node"}
 	)
 
 	i.BuildFn = func(ctx context.Context, opts pack.BuildOptions) error {
-		expected := defaultBuildpacks["go"]
+		expected := defaultBuildpacks["node"]
 		if !reflect.DeepEqual(expected, opts.Buildpacks) {
 			t.Fatalf("expected buildpacks '%v', got '%v'", expected, opts.Buildpacks)
 		}
@@ -141,7 +141,7 @@ func TestBuild_BuilderImageExclude(t *testing.T) {
 		b = NewBuilder( // Func Builder logic
 			WithName(builders.Pack), WithImpl(i))
 		f = fn.Function{
-			Runtime: "go",
+			Runtime: "node",
 		}
 	)
 	funcIgnoreContent := []byte(`#testing comments

pkg/builders/buildpacks/builder_test.go

@@ -413,6 +413,11 @@ func createAndApplyPipelineRunTemplate(f fn.Function, namespace string, labels m
 		}
 	}
 
+	// add BP_GO_WORKDIR for go-build buildpack
+	if f.Runtime == "go" {
+		buildEnvs = append(buildEnvs, "BP_GO_WORKDIR=.func/builds/last")
+	}
+
 	s2iImageScriptsUrl := defaultS2iImageScriptsUrl
 	if f.Runtime == "quarkus" {
 		s2iImageScriptsUrl = quarkusS2iImageScriptsUrl

pkg/pipelines/tekton/templates.go

@@ -31,7 +31,7 @@ import (
 //	fs:      filesytem which contains scaffolding at '[runtime]/scaffolding'
 //	         (exclusive with 'repo')
 func Write(out, src, runtime, invoke string, fs filesystem.Filesystem) (err error) {
-
+	fmt.Println("#### scaffolding.Write")
 	// detect the signature of the source code in the given location, presuming
 	// a runtime and invocation hint (default "http")
 	s, err := detectSignature(src, runtime, invoke)

pkg/scaffolding/scaffold.go

@@ -3,8 +3,6 @@ buildEnvs:
     value: "false"
   - name: BP_JVM_VERSION
     value: "21"
-  - name: BP_MAVEN_ACTIVE_PROFILES
-    value: "native"
 healthEndpoints:
   liveness: /actuator/health
   readiness: /actuator/health