Compatible with go:generate

README.md

@@ -33,10 +33,18 @@ Usage of interfacer:
 ```
 
 *Example*
-
+- generate by manually
+```bash
+~ $ interfacer -for os.File -as mock.File
+```
+- generate by go generate
+```go
+//go:generate interfacer -for os.File -as mock.File -o file_iface.go
+```
 ```bash
-~ $ interfacer -for \"os\".File -as mock.File
+~ $ go generate  ./...
 ```
+- output
 ```go
 // Created by interfacer; DO NOT EDIT
 

build_test.go

@@ -29,7 +29,7 @@ func TestBuild(t *testing.T) {
 		"interfacer": {
 			run: func(base string) error {
 				args := []string{
-					"-for", `"os".File`,
+					"-for", `os.File`,
 					"-as", "mock.File",
 					"-o", filepath.Join(base, "package.go"),
 				}

cmd/interfacer/main.go

@@ -75,7 +75,7 @@ func main() {
 		die(err)
 	}
 	v := &vars{
-		Type:      *query,
+		Type:      fmt.Sprintf(`"%s"`, *query),
 		Deps:      i.Deps(),
 		Interface: i,
 	}

example_test.go

@@ -36,7 +36,7 @@ func (ExampleBaz) D(*map[interface{}]struct{}, interface{}) (chan struct{}, []in
 func (*ExampleBaz) E(*[]map[*flag.FlagSet]struct{}, [3]string) {}
 
 func ExampleNew() {
-	i, err := interfaces.New(`"github.com/rjeczalik/interfaces".ExampleBaz`)
+	i, err := interfaces.New(`github.com/rjeczalik/interfaces.ExampleBaz`)
 	if err != nil {
 		fmt.Println(err)
 		return

interfaces_test.go

@@ -8,11 +8,11 @@ import (
 
 func TestParseQuery(t *testing.T) {
 	cases := map[string]*interfaces.Query{
-		`"os".File`: {
+		`os.File`: {
 			Package:  "os",
 			TypeName: "File",
 		},
-		`"github.com/rjeczalik/interfaces".Query`: {
+		`github.com/rjeczalik/interfaces.Query`: {
 			Package:  "github.com/rjeczalik/interfaces",
 			TypeName: "Query",
 		},

options.go

@@ -17,26 +17,16 @@ type Query struct {
 
 // ParseQuery gives new Query for the given query text.
 func ParseQuery(query string) (*Query, error) {
-	if query == "" {
-		return nil, errors.New("query string is empty")
+	idx := strings.LastIndex(query, ".")
+	if idx == -1 || query[:idx] == "" || query[idx+1:] == "" {
+		return nil, errors.New("generating source should be path/to/package.type")
 	}
-	var q Query
-	if query[0] != '"' {
-		return nil, errSyntax
-	}
-	query = query[1:]
-	i := strings.LastIndex(query, `"`)
-	if i == -1 || i+1 == len(query) || query[i+1] != '.' {
-		return nil, errSyntax
-	}
-	q.Package = query[:i]
-	q.TypeName = query[i+2:]
-	if err := q.valid(); err != nil {
-		return nil, err
-	}
-	return &q, nil
-}
 
+	return &Query{
+		Package:  query[:idx],
+		TypeName: query[idx+1:],
+	}, nil
+}
 func (q *Query) valid() error {
 	if q == nil {
 		return errors.New("query is nil")