Refactor flags, add run() for better extensibility (#115)

This commit is contained in:
Suhas Karanth 2019-12-23 20:40:26 +05:30 committed by Mat Ryer
parent 0e0395200a
commit fc1865052c

93
main.go
View File

@ -13,54 +13,65 @@ import (
"github.com/matryer/moq/pkg/moq" "github.com/matryer/moq/pkg/moq"
) )
func main() { type userFlags struct {
var err error outFile string
defer func() { pkgName string
if err != nil { args []string
fmt.Fprintln(os.Stderr, err) }
flag.Usage()
os.Exit(1) func main() {
var flags userFlags
flag.StringVar(&flags.outFile, "out", "", "output file (default stdout)")
flag.StringVar(&flags.pkgName, "pkg", "", "package name (default will infer)")
}
}()
var (
outFile = flag.String("out", "", "output file (default stdout)")
pkgName = flag.String("pkg", "", "package name (default will infer)")
)
flag.Usage = func() { flag.Usage = func() {
fmt.Println(`moq [flags] destination interface [interface2 [interface3 [...]]]`) fmt.Println(`moq [flags] destination interface [interface2 [interface3 [...]]]`)
flag.PrintDefaults() flag.PrintDefaults()
fmt.Println(`Specifying an alias for the mock is also supported with the format 'interface:alias'`) fmt.Println(`Specifying an alias for the mock is also supported with the format 'interface:alias'`)
fmt.Println(`Ex: moq -pkg different . MyInterface:MyMock`) fmt.Println(`Ex: moq -pkg different . MyInterface:MyMock`)
} }
flag.Parse() flag.Parse()
args := flag.Args() flags.args = flag.Args()
if len(args) < 2 {
err = errors.New("not enough arguments") if err := run(flags); err != nil {
return fmt.Fprintln(os.Stderr, err)
} flag.Usage()
destination := args[0] os.Exit(1)
args = args[1:]
var buf bytes.Buffer
var out io.Writer
out = os.Stdout
if len(*outFile) > 0 {
out = &buf
}
m, err := moq.New(destination, *pkgName)
if err != nil {
return
}
err = m.Mock(out, args...)
if err != nil {
return
}
// create the file
if len(*outFile) > 0 {
err = os.MkdirAll(filepath.Dir(*outFile), 0755)
if err != nil {
return
}
err = ioutil.WriteFile(*outFile, buf.Bytes(), 0644)
} }
} }
func run(flags userFlags) error {
if len(flags.args) < 2 {
return errors.New("not enough arguments")
}
var buf bytes.Buffer
var out io.Writer = os.Stdout
if flags.outFile != "" {
out = &buf
}
destination := flags.args[0]
args := flags.args[1:]
m, err := moq.New(destination, flags.pkgName)
if err != nil {
return err
}
if err = m.Mock(out, args...); err != nil {
return err
}
if flags.outFile == "" {
return nil
}
// create the file
err = os.MkdirAll(filepath.Dir(flags.outFile), 0755)
if err != nil {
return err
}
return ioutil.WriteFile(flags.outFile, buf.Bytes(), 0644)
}