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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| package cmd | ||
|
|
||
| import ( | ||
| "github.com/mukezhz/geng/pkg/utility" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| var generateFxCmd = &cobra.Command{ | ||
| Use: "fx", | ||
| Short: "Generate the fx configuration file for the project", | ||
| Long: ` | ||
| Generate a module by reading comments from the source code. | ||
| Example: | ||
| geng fx | ||
| `, | ||
| Args: cobra.MaximumNArgs(2), | ||
| Run: generateFx, | ||
| } | ||
|
|
||
| func generateFx(_ *cobra.Command, _ []string) { | ||
| utility.GenerateFxModule() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| package utility | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "go/ast" | ||
| "go/parser" | ||
| "go/token" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| "text/template" | ||
|
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| "golang.org/x/text/cases" | ||
| "golang.org/x/text/language" | ||
| ) | ||
|
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| func GenerateFxModule() { | ||
| fset := token.NewFileSet() | ||
| root := "./" | ||
| moduleMap := make(map[string][]string) | ||
|
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| err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error { | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if info.IsDir() { | ||
| return nil | ||
| } | ||
| if !strings.HasSuffix(info.Name(), ".go") { | ||
| return nil | ||
| } | ||
|
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| file, err := parser.ParseFile(fset, path, nil, parser.ParseComments) | ||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Failed to parse file %s: %v\n", path, err) | ||
| return err | ||
| } | ||
|
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| processedFile := processFile(file) | ||
| if len(processedFile) != 0 { | ||
| moduleMap[filepath.Dir(path)] = append(moduleMap[filepath.Dir(path)], processedFile...) | ||
| } | ||
|
|
||
| return nil | ||
| }) | ||
| generateFile(moduleMap) | ||
|
|
||
| if err != nil { | ||
| fmt.Fprintf(os.Stderr, "Error walking through the directory: %v\n", err) | ||
| os.Exit(1) | ||
| } | ||
| } | ||
|
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| func processFile(file *ast.File) []string { | ||
| providers := make([]string, 0) | ||
| ast.Inspect(file, func(n ast.Node) bool { | ||
| fn, ok := n.(*ast.FuncDecl) | ||
| if !ok || fn.Doc == nil { | ||
| return true | ||
| } | ||
|
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| var provide bool | ||
| var asInterface string | ||
|
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| for _, comment := range fn.Doc.List { | ||
| if strings.Contains(comment.Text, "@fxProvide") { | ||
| provide = true | ||
| } | ||
| if strings.HasPrefix(comment.Text, "// @fxAs ") { | ||
| parts := strings.SplitN(comment.Text, " ", 3) | ||
| if len(parts) > 2 { | ||
| asInterface = strings.TrimSpace(parts[2]) | ||
| } | ||
| } | ||
| } | ||
|
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| if provide { | ||
| if asInterface != "" { | ||
| providers = append(providers, fmt.Sprintf("fx.Provide(fx.Annotate(%s, fx.As(new(%s)))),", fn.Name.Name, asInterface)) | ||
| } else { | ||
| providers = append(providers, fmt.Sprintf("fx.Provide(%s),", fn.Name.Name)) | ||
| } | ||
| } | ||
| return true | ||
| }) | ||
| return providers | ||
| } | ||
|
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| type Module struct { | ||
| PackageName string | ||
| ModuleName string | ||
| Name string | ||
| Providers []string | ||
| } | ||
|
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| const templateText = `package {{.PackageName}} | ||
| import "go.uber.org/fx" | ||
| // This file is generated by geng. DO NOT EDIT. | ||
| // File generated at: {{.Timestamp}} | ||
| // File will be overwritten when running geng again. | ||
| var {{.ModuleName}} = fx.Module("{{.Name}}", | ||
| {{- range .Providers}} | ||
| {{.}} | ||
| {{- end}} | ||
| ) | ||
| ` | ||
|
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| func generateFile(dependencies map[string][]string) { | ||
| tmpl, err := template.New("module").Parse(templateText) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
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| for k, v := range dependencies { | ||
| module := Module{ | ||
| PackageName: filepath.Base(k), | ||
| Name: filepath.Base(k), | ||
| ModuleName: cases.Title(language.English).String(filepath.Base(k)), | ||
| Providers: v, | ||
| } | ||
| filePath := filepath.Join(k, "module.go") | ||
| file, err := os.Create(filePath) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer file.Close() | ||
|
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| err = tmpl.Execute(file, module) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| } | ||
| count := len(dependencies) | ||
| fmt.Printf("Generated %d module files\n", count) | ||
| } |