How to use Transform method of compiler Package

Best K6 code snippet using compiler.Transform

compiler.go

Source:compiler.go

...11var tscSrc string12type Compiler struct {13	babelVm       *goja.Runtime14	babelCompiler goja.Value15	TransformFunc goja.Callable16	tscVm        *goja.Runtime17	tscCompiler  goja.Value18	tscTranspile goja.Callable19	tscModule    goja.Value20	lockMutex sync.Mutex21}22func (c *Compiler) Compile(source string, filename string, main bool) (*goja.Program, error) {23	// Compiling is locked24	c.lockMutex.Lock()25	defer c.lockMutex.Unlock()26	options := map[string]interface{}{27		"compilerOptions": map[string]interface{}{28			"module": c.tscModule,29			//"module": "es6",30			//"target": "es5",31		},32	}33	// TSC test34	value, err := c.tscTranspile(c.tscCompiler, c.tscVm.ToValue(c.tscVm.ToValue(source)), c.tscVm.ToValue(options))35	if err != nil {36		return nil, err37	}38	transpiledSource := value.ToObject(c.tscVm).Get("outputText").String()39	// Transform the code40	opts := c.getOptions()41	opts["filename"] = filename42	v, err := c.TransformFunc(c.babelCompiler, c.babelVm.ToValue(transpiledSource), c.babelVm.ToValue(opts))43	if err != nil {44		return nil, err45	}46	vObject := v.ToObject(c.babelVm)47	var code string48	if err := c.babelVm.ExportTo(vObject.Get("code"), &code); err != nil {49		return nil, err50	}51	if !main {52		code = "(function(module, exports){\n" + code + "\n})\n"53	}54	ast, err := parser.ParseFile(nil, filename, code, 0, parser.WithDisableSourceMaps)55	if err != nil {56		return nil, err57	}58	program, err := goja.CompileAST(ast, true)59	if err != nil {60		return nil, err61	}62	return program, nil63}64func (c *Compiler) getOptions() map[string]interface{} {65	return map[string]interface{}{66		// "presets": []string{"latest"},67		"plugins": []interface{}{68			// es2015 https://github.com/babel/babel/blob/v6.26.0/packages/babel-preset-es2015/src/index.js69			// in goja70			// []interface{}{"transform-es2015-template-literals", map[string]interface{}{"loose": false, "spec": false}},71			// "transform-es2015-literals", // in goja72			// "transform-es2015-function-name", // in goja73			// []interface{}{"transform-es2015-arrow-functions", map[string]interface{}{"spec": false}}, // in goja74			// "transform-es2015-block-scoped-functions", // in goja75			[]interface{}{"transform-es2015-classes", map[string]interface{}{"loose": false}},76			"transform-es2015-object-super",77			// "transform-es2015-shorthand-properties", // in goja78			// "transform-es2015-duplicate-keys", // in goja79			// []interface{}{"transform-es2015-computed-properties", map[string]interface{}{"loose": false}}, // in goja80			// "transform-es2015-for-of", // in goja81			// "transform-es2015-sticky-regex", // in goja82			// "transform-es2015-unicode-regex", // in goja83			// "check-es2015-constants", // in goja84			// []interface{}{"transform-es2015-spread", map[string]interface{}{"loose": false}}, // in goja85			// "transform-es2015-parameters", // in goja86			// []interface{}{"transform-es2015-destructuring", map[string]interface{}{"loose": false}}, // in goja87			// "transform-es2015-block-scoping", // in goja88			// "transform-es2015-typeof-symbol", // in goja89			// all the other module plugins are just dropped90			[]interface{}{"transform-es2015-modules-commonjs", map[string]interface{}{"loose": false}},91			// "transform-regenerator", // Doesn't really work unless regeneratorRuntime is also added92			// es2016 https://github.com/babel/babel/blob/v6.26.0/packages/babel-preset-es2016/src/index.js93			"transform-exponentiation-operator",94			// es2017 https://github.com/babel/babel/blob/v6.26.0/packages/babel-preset-es2017/src/index.js95			// "syntax-trailing-function-commas", // in goja96			// "transform-async-to-generator", // Doesn't really work unless regeneratorRuntime is also added97		},98		"ast":           false,99		"sourceMaps":    false,100		"babelrc":       false,101		"compact":       false,102		"retainLines":   true,103		"highlightCode": false,104	}105}106func (c *Compiler) compileAndLoad(name string, source string, strict bool) (*goja.Runtime, error) {107	program, err := goja.Compile(name, source, strict)108	if err != nil {109		return nil, err110	}111	vm := goja.New()112	_, err = vm.RunProgram(program)113	if err != nil {114		return nil, err115	}116	return vm, nil117}118func (c *Compiler) loadBabel() error {119	babelVm, err := c.compileAndLoad("babel.min.js", babelSrc, false)120	if err != nil {121		return err122	}123	babelCompiler := babelVm.Get("Babel")124	babelObject := babelCompiler.ToObject(babelVm)125	c.babelVm = babelVm126	c.babelCompiler = babelCompiler127	if err := babelVm.ExportTo(babelObject.Get("transform"), &c.TransformFunc); err != nil {128		return err129	}130	return nil131}132func (c *Compiler) loadTsc() error {133	vm, err := c.compileAndLoad("v4.2.4.min.js", tscSrc, false)134	if err != nil {135		return err136	}137	tsc := vm.Get("ts")138	tscObject := tsc.ToObject(vm)139	object := tscObject.Get("ModuleKind").ToObject(c.tscVm).Get("CommonJS").ToNumber()140	c.tscModule = object141	c.tscVm = vm...

opt.go

Source:opt.go

...4	"path/filepath"5)6// Option set a compiler option.7type Option func(*Compiler)8// WithTransform returns a compiler option to set transform t.9func WithTransform(t Transform) Option {10	return func(c *Compiler) {11		c.transforms = append(c.transforms, t)12	}13}14// WithMetadata returns a compiler option to set metadata.15func WithMetadata(m Metadata) Option {16	return func(c *Compiler) {17		c.metadata = m18	}19}20// WithClone returns a compiler option to clone.21func WithClone(clone bool) Option {22	return func(c *Compiler) {23		c.noclone = !clone24	}25}26// WithVolumes configutes the compiler with default volumes that27// are mounted to each container in the pipeline.28func WithVolumes(volumes ...string) Option {29	return WithTransform(30		transformVolume(volumes...),31	)32}33// WithRegistry configures the compiler with registry credentials34// that should be used to download images.35func WithRegistry(registries ...Registry) Option {36	return WithTransform(37		transformRegistry(registries...),38	)39}40// WithSecret configures the compiler with external secrets41// to be injected into the container at runtime.42func WithSecret(secrets ...Secret) Option {43	return WithTransform(44		transformSecret(secrets...),45	)46}47// WithNetrc configures the compiler with netrc authentication48// credentials added by default to every container in the pipeline.49func WithNetrc(username, password, machine string) Option {50	return WithEnviron(51		map[string]string{52			"CI_NETRC_USERNAME":    username,53			"CI_NETRC_PASSWORD":    password,54			"CI_NETRC_MACHINE":     machine,55			"DRONE_NETRC_USERNAME": username,56			"DRONE_NETRC_PASSWORD": password,57			"DRONE_NETRC_MACHINE":  machine,58		},59	)60}61// WithWorkspace configures the compiler with the workspace base62// and path. The workspace base is a volume created at runtime and63// mounted into all containers in the pipeline. The base and path64// are joined to provide the working directory for all build and65// plugin steps in the pipeline.66func WithWorkspace(base, path string) Option {67	return WithTransform(68		transformWorkspace(base, path),69	)70}71// WithWorkspaceFromURL configures the compiler with the workspace72// base and path based on the repository url.73func WithWorkspaceFromURL(base, link string) Option {74	path := "src"75	parsed, err := url.Parse(link)76	if err == nil {77		path = filepath.Join(path, parsed.Hostname(), parsed.Path)78	}79	return WithWorkspace(base, path)80}81// WithPrivileged configures the compiler to automatically execute82// images as privileged containers if the match the given list.83func WithPrivileged(images ...string) Option {84	return WithTransform(85		transformPrivilege(images...),86	)87}88// WithEnviron configures the compiler with environment variables89// added by default to every container in the pipeline.90func WithEnviron(env map[string]string) Option {91	return WithTransform(92		transformEnv(env),93	)94}95// WithNetworks configures the compiler with additionnal networks96// to be connected to build containers97func WithNetworks(networks ...string) Option {98	return WithTransform(99		transformNetwork(networks...),100	)101}102// WithLimits configures the compiler with default resource limits that103// are applied each container in the pipeline.104func WithLimits(limits Resources) Option {105	return WithTransform(106		transformLimits(limits),107	)108}...

Transform

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	f, err := parser.ParseFile(fset, "test.go", nil, 0)5	if err != nil {6		fmt.Printf("Error parsing file: %v", err)7		os.Exit(1)8	}9	pkgs, err := packages.Load(nil, ".")10	if err != nil {11		log.Fatal(err)12	}13	conf := types.Config{Importer: pkg.Fset}14	_, err = conf.Check(pkg.PkgPath, pkg.Fset, []*ast.File{f}, nil)15	if err != nil {16		log.Fatal(err)17	}18	c := astutil.NewPackageCompiler(pkg.Fset, pkg.TypesInfo, nil)19	c.Transform(f)20	ast.Print(fset, f)21}22import "fmt"23func main() {24	fmt.Println("Hello World")25}26import (27func main() {28	fset := token.NewFileSet()29	f, err := parser.ParseFile(fset, "test.go", nil, 0)30	if err != nil {31		fmt.Printf("Error parsing file: %v", err)32		os.Exit(1)33	}34	pkgs, err := packages.Load(nil, ".")

Transform

Using AI Code Generation

1import (2func main() {3	pkgs, err := packages.Load(&conf, os.Args[1])4	if err != nil {5		log.Fatal(err)6	}7	if packages.PrintErrors(pkgs) > 0 {8		os.Exit(1)9	}10	mainPkg := ssa.NewPackage(ssa.GlobalDebug, token.NewFileSet(), "main", "main")11	mainPkg.Pkg = &types.Package{}12	mainPkg.Members = make(map[ssa.Member]bool)13	mainFunc := ssa.NewFunction(mainPkg, token.NoPos, "main", nil, nil)14	mainPkg.Func("main").Synthetic = "package main"15	c := ssautil.NewChecker()16	c.Init(mainPkg, mainFunc, nil, nil)17	b := ssautil.NewBuilder(mainFunc)18	t := ssautil.NewTransformer(mainFunc)19	for _, pkg := range pkgs {20		if pkg.PkgPath == "unsafe" {21		}22		for _, file := range pkg.Syntax {23			f := b.CreateFunction(file)24			c.CreatePackage(pkg.TypesInfo, pkg.Types, f)25			t.TransformPackage(pkg.TypesInfo, pkg.Types, f)26		}27	}

Transform

Using AI Code Generation

1import (2func main() {3	reader := bufio.NewReader(os.Stdin)4	fmt.Print("Enter text: ")5	text, _ := reader.ReadString('6	fmt.Println(text)7	c := regexp.MustCompile("a(x*)b")8	fmt.Println(c.Transform(text))9}

Transform

Using AI Code Generation

1import (2func main() {3import "fmt"4func main() {5    fmt.Println("Hello, world.")6}7    f, err := parser.ParseFile(fset, "hello.go", src, parser.ImportsOnly)8    if err != nil {9        fmt.Println(err)10    }11    for _, s := range f.Imports {12        fmt.Println(s.Path.Value)13    }14}15|   └───*ast.File {16|       .  Name: *ast.Ident {17|       .  }18|       .  Decls: []ast.Decl (len = 1) {19|       .  .  0: *ast.GenDecl {20|       .  .  .  Tok: import21|       .  .  .  Specs: []ast.Spec (len = 1) {22|       .  .  .  .  0: *ast.ImportSpec {23|       .  .  .  .  .  Path: *ast.BasicLit {24|       .  .  .  .  .  }25|       .  .  .  .  }26|       .  .  .  }27|       .  .  }

Transform

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)4	if err != nil {5		log.Fatal(err)6	}7	fmt.Println("Imports:")8	for _, s := range f.Imports {9		fmt.Println(s.Path.Value)10	}

Transform

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)5	if err != nil {6		log.Fatal(err)7	}8	c := types.NewCompiler(fset, nil, nil, 0)9	err = c.Compile([]*ast.File{f})10	if err != nil {11		log.Fatal(err)12	}13	info := c.Info()14	for _, p := range info.Defs {15		fmt.Println(p.Name())16	}17}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.