How to use transformImpl method of compiler Package

Best K6 code snippet using compiler.transformImpl

compiler.go

Source:compiler.go Github

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...147 "The source for `%s` needs to be transpiled by Babel, but its source map will"+148 " not be accepted by Babel, so it was disabled", filename)149 }150 }151 code, srcMap, err = c.babel.transformImpl(c.logger, src, filename, sourceMapEnabled, inputSrcMap)152 return153}154// Options are options to the compiler155type Options struct {156 CompatibilityMode lib.CompatibilityMode157 SourceMapLoader func(string) ([]byte, error)158 Strict bool159}160// compilationState is helper struct to keep the state of a compilation161type compilationState struct {162 // set when we couldn't load external source map so we can try parsing without loading it163 couldntLoadSourceMap bool164 // srcMap is the current full sourceMap that has been generated read so far165 srcMap []byte166 srcMapError error167 main bool168 compiler *Compiler169}170// Compile the program in the given CompatibilityMode, wrapping it between pre and post code171func (c *Compiler) Compile(src, filename string, main bool) (*goja.Program, string, error) {172 return c.compileImpl(src, filename, main, c.Options.CompatibilityMode, nil)173}174// sourceMapLoader is to be used with goja's WithSourceMapLoader175// it not only gets the file from disk in the simple case, but also returns it if the map was generated from babel176// additioanlly it fixes off by one error in commonjs dependencies due to having to wrap them in a function.177func (c *compilationState) sourceMapLoader(path string) ([]byte, error) {178 if path == sourceMapURLFromBabel {179 if !c.main {180 return c.increaseMappingsByOne(c.srcMap)181 }182 return c.srcMap, nil183 }184 c.srcMap, c.srcMapError = c.compiler.Options.SourceMapLoader(path)185 if c.srcMapError != nil {186 c.couldntLoadSourceMap = true187 return nil, c.srcMapError188 }189 _, c.srcMapError = sourcemap.Parse(path, c.srcMap)190 if c.srcMapError != nil {191 c.couldntLoadSourceMap = true192 c.srcMap = nil193 return nil, c.srcMapError194 }195 if !c.main {196 return c.increaseMappingsByOne(c.srcMap)197 }198 return c.srcMap, nil199}200func (c *Compiler) compileImpl(201 src, filename string, main bool, compatibilityMode lib.CompatibilityMode, srcMap []byte,202) (*goja.Program, string, error) {203 code := src204 state := compilationState{srcMap: srcMap, compiler: c, main: main}205 if !main { // the lines in the sourcemap (if available) will be fixed by increaseMappingsByOne206 code = "(function(module, exports){\n" + code + "\n})\n"207 }208 opts := parser.WithDisableSourceMaps209 if c.Options.SourceMapLoader != nil {210 opts = parser.WithSourceMapLoader(state.sourceMapLoader)211 }212 ast, err := parser.ParseFile(nil, filename, code, 0, opts)213 if state.couldntLoadSourceMap {214 state.couldntLoadSourceMap = false // reset215 // we probably don't want to abort scripts which have source maps but they can't be found,216 // this also will be a breaking change, so if we couldn't we retry with it disabled217 c.logger.WithError(state.srcMapError).Warnf("Couldn't load source map for %s", filename)218 ast, err = parser.ParseFile(nil, filename, code, 0, parser.WithDisableSourceMaps)219 }220 if err != nil {221 if compatibilityMode == lib.CompatibilityModeExtended {222 code, state.srcMap, err = c.Transform(src, filename, state.srcMap)223 if err != nil {224 return nil, code, err225 }226 // the compatibility mode "decreases" here as we shouldn't transform twice227 return c.compileImpl(code, filename, main, lib.CompatibilityModeBase, state.srcMap)228 }229 return nil, code, err230 }231 pgm, err := goja.CompileAST(ast, c.Options.Strict)232 return pgm, code, err233}234type babel struct {235 vm *goja.Runtime236 this goja.Value237 transform goja.Callable238 m sync.Mutex239}240func newBabel() (*babel, error) {241 onceBabelCode.Do(func() {242 globalBabelCode, globalBabelCodeErr = goja.Compile("<internal/k6/compiler/lib/babel.min.js>", babelSrc, false)243 })244 if globalBabelCodeErr != nil {245 return nil, globalBabelCodeErr246 }247 vm := goja.New()248 _, err := vm.RunProgram(globalBabelCode)249 if err != nil {250 return nil, err251 }252 this := vm.Get("Babel")253 bObj := this.ToObject(vm)254 result := &babel{vm: vm, this: this}255 if err = vm.ExportTo(bObj.Get("transform"), &result.transform); err != nil {256 return nil, err257 }258 return result, err259}260// increaseMappingsByOne increases the lines in the sourcemap by line so that it fixes the case where we need to wrap a261// required file in a function to support/emulate commonjs262func (c *compilationState) increaseMappingsByOne(sourceMap []byte) ([]byte, error) {263 var err error264 m := make(map[string]interface{})265 if err = json.Unmarshal(sourceMap, &m); err != nil {266 return nil, err267 }268 mappings, ok := m["mappings"]269 if !ok {270 // no mappings, no idea what this will do, but just return it as technically we can have sourcemap with sections271 // TODO implement incrementing of `offset` in the sections? to support that case as well272 // see https://sourcemaps.info/spec.html#h.n05z8dfyl3yh273 //274 // TODO (kind of alternatively) drop the newline in the "commonjs" wrapping and have only the first line wrong275 // and drop this whole function276 return sourceMap, nil277 }278 if str, ok := mappings.(string); ok {279 // ';' is the separator between lines so just adding 1 will make all mappings be for the line after which they were280 // originally281 m["mappings"] = ";" + str282 } else {283 // we have mappings but it's not a string - this is some kind of error284 // we still won't abort the test but just not load the sourcemap285 c.couldntLoadSourceMap = true286 return nil, errors.New(`missing "mappings" in sourcemap`)287 }288 return json.Marshal(m)289}290// transformImpl the given code into ES5, while synchronizing to ensure only a single291// bundle instance / Goja VM is in use at a time.292func (b *babel) transformImpl(293 logger logrus.FieldLogger, src, filename string, sourceMapsEnabled bool, inputSrcMap []byte,294) (string, []byte, error) {295 b.m.Lock()296 defer b.m.Unlock()297 opts := make(map[string]interface{})298 for k, v := range DefaultOpts {299 opts[k] = v300 }301 if sourceMapsEnabled {302 // given that the source map should provide accurate lines(and columns), this option isn't needed303 // it also happens to make very long and awkward lines, especially around import/exports and definitely a lot304 // less readable overall. Hopefully it also has some performance improvement not trying to keep the same lines305 opts["retainLines"] = false306 opts["sourceMaps"] = true...

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transformImpl

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1import (2type compiler struct {3}4func (c compiler) transformImpl() {5 fmt.Println("transformImpl")6}7func main() {8 c.transformImpl()9}10import (11type compiler struct {12}13func (c compiler) transformImpl() {14 fmt.Println("transformImpl")15}16func main() {17 c.transformImpl()18}19import (20type compiler struct {21}22func (c *compiler) transformImpl() {23 fmt.Println("transformImpl")24}25func main() {26 c.transformImpl()27}28import (29type compiler struct {30}31func (c *compiler) transformImpl() {32 fmt.Println("transformImpl")33}34func main() {35 c.transformImpl()36}37import (38type compiler struct {39}40func (c compiler) transformImpl() {41 fmt.Println("transformImpl")42}43func main() {44 c.transformImpl()45}46import (47type compiler struct {48}49func (c compiler) transformImpl() {50 fmt.Println("transformImpl")51}52func main() {53 c.transformImpl()54}

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transformImpl

Using AI Code Generation

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1import (2func main() {3 src, err := parser.ParseFile(fset, "test.go", nil, parser.ParseComments)4 if err != nil {5 fmt.Println(err)6 os.Exit(1)7 }8 pretty.Println("ast", src)9 pretty.Println("ast", src.Imports)10 pretty.Println("ast", src.Decls)11 pretty.Println("ast", src.Scope)12 pretty.Println("ast", src.Comments)13 pretty.Println("ast", src.Unresolved)14 pretty.Println("ast", src.Name)15 pretty.Println("ast", src.Doc)16 pretty.Println("ast", src.End())17 pretty.Println("ast", src.Pos())18 pretty.Println("ast", src.TokPos)19 for _, decl := range src.Decls {20 pretty.Println("ast", decl)21 pretty.Println("ast", decl.Pos())22 if decl, ok := decl.(*ast.GenDecl); ok {23 pretty.Println("ast", decl)24 pretty.Println("ast", decl.Doc)25 pretty.Println("ast", decl.Specs)26 pretty.Println("ast", decl.TokPos)27 pretty.Println("ast", decl.Lparen)28 pretty.Println("ast", decl.Rparen)29 pretty.Println("ast", decl.Tok)30 pretty.Println("ast", decl.End())31 pretty.Println("ast", decl.Pos())32 }33 if decl, ok := decl.(*ast.FuncDecl); ok {34 pretty.Println("ast", decl)35 pretty.Println("ast", decl

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transformImpl

Using AI Code Generation

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1import "fmt"2type compiler struct {3}4func (c *compiler) transformImpl() {5 fmt.Println("transformImpl")6}7type compilerDecorator struct {8}9func (c *compilerDecorator) transformImpl() {10 fmt.Println("before")11 c.compiler.transformImpl()12 fmt.Println("after")13}14func main() {15 c := compiler{target: "target"}16 c.transformImpl()17 d := compilerDecorator{compiler: compiler{target: "target"}}18 d.transformImpl()19}20import "fmt"21type compiler interface {22 transformImpl()23}24type compilerDecorator struct {25}26func (c *compilerDecorator) transformImpl() {27 fmt.Println("before")28 c.compiler.transformImpl()29 fmt.Println("after")30}31type compilerImpl struct {32}33func (c *compilerImpl) transformImpl() {34 fmt.Println("transformImpl")35}36func main() {37 c := compilerImpl{target: "target"}38 c.transformImpl()39 d := compilerDecorator{compiler: compilerImpl{target: "target"}}40 d.transformImpl()41}

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transformImpl

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1import (2func main() {3 fset := token.NewFileSet()4 file, err := parser.ParseFile(fset, "stdin", code, 0)5 if err != nil {6 log.Fatal(err)7 }8 comp := types.NewPackage("main", "main")9 comp.MarkComplete()10 compiler := types.NewCompiler(fset, types.Config{Importer: importer{comp}}, comp, nil)11 compiler.TransformFile(file)12 ast.Print(fset, file)13}14type importer struct {15}16func (i importer) Import(path string) (*types.Package, error) {17 if path == "unsafe" {18 }19 return nil, fmt.Errorf("can't import %q", path)20}21func (i importer) ImportFrom(path, srcDir string, mode types.ImportMode) (*types.Package, error) {22 if path == "unsafe" {23 }24 if !strings.HasPrefix(path, "./") {25 return nil, fmt.Errorf("can't import %q", path)26 }27 if srcDir != "." {28 return nil, fmt.Errorf("can't import %q from %q", path, srcDir)29 }30}31import (32func main() {33 fset := token.NewFileSet()34 file, err := parser.ParseFile(fset, "stdin", code, 0)35 if err != nil {36 log.Fatal(err)37 }

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