_codegen: copy dependency github.com/ernesto-jimenez/gogen/imports

_codegen/go.mod

@@ -1,5 +1,3 @@
 module github.com/stretchr/testify/_codegen
 
 go 1.11
-
-require github.com/ernesto-jimenez/gogen v0.0.0-20180125220232-d7d4131e6607

_codegen/go.sum

@@ -1,2 +0,0 @@
-github.com/ernesto-jimenez/gogen v0.0.0-20180125220232-d7d4131e6607 h1:cTavhURetDkezJCvxFggiyLeP40Mrk/TtVg2+ycw1Es=
-github.com/ernesto-jimenez/gogen v0.0.0-20180125220232-d7d4131e6607/go.mod h1:Cg4fM0vhYWOZdgM7RIOSTRNIc8/VT7CXClC3Ni86lu4=

_codegen/internal/imports/imports.go

@@ -0,0 +1,108 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2015 Ernesto Jiménez
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+package imports
+
+import (
+	"go/types"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Importer interface {
+	AddImportsFrom(t types.Type)
+	Imports() map[string]string
+}
+
+// imports contains metadata about all the imports from a given package
+type imports struct {
+	currentpkg string
+	imp        map[string]string
+}
+
+// AddImportsFrom adds imports used in the passed type
+func (imp *imports) AddImportsFrom(t types.Type) {
+	switch el := t.(type) {
+	case *types.Basic:
+	case *types.Slice:
+		imp.AddImportsFrom(el.Elem())
+	case *types.Pointer:
+		imp.AddImportsFrom(el.Elem())
+	case *types.Named:
+		pkg := el.Obj().Pkg()
+		if pkg == nil {
+			return
+		}
+		if pkg.Name() == imp.currentpkg {
+			return
+		}
+		imp.imp[cleanImportPath(pkg.Path())] = pkg.Name()
+	case *types.Tuple:
+		for i := 0; i < el.Len(); i++ {
+			imp.AddImportsFrom(el.At(i).Type())
+		}
+	default:
+	}
+}
+
+func cleanImportPath(ipath string) string {
+	return gopathlessImportPath(
+		vendorlessImportPath(ipath),
+	)
+}
+
+func gopathlessImportPath(ipath string) string {
+	paths := strings.Split(os.Getenv("GOPATH"), ":")
+	for _, p := range paths {
+		ipath = strings.TrimPrefix(ipath, filepath.Join(p, "src")+string(filepath.Separator))
+	}
+	return ipath
+}
+
+// vendorlessImportPath returns the devendorized version of the provided import path.
+// e.g. "foo/bar/vendor/a/b" => "a/b"
+func vendorlessImportPath(ipath string) string {
+	// Devendorize for use in import statement.
+	if i := strings.LastIndex(ipath, "/vendor/"); i >= 0 {
+		return ipath[i+len("/vendor/"):]
+	}
+	if strings.HasPrefix(ipath, "vendor/") {
+		return ipath[len("vendor/"):]
+	}
+	return ipath
+}
+
+// AddImportsFrom adds imports used in the passed type
+func (imp *imports) Imports() map[string]string {
+	return imp.imp
+}
+
+// New initializes a new structure to track packages imported by the currentpkg
+func New(currentpkg string) Importer {
+	return &imports{
+		currentpkg: currentpkg,
+		imp:        make(map[string]string),
+	}
+}

_codegen/main.go

@@ -23,7 +23,7 @@ import (
 	"strings"
 	"text/template"
 
-	"github.com/ernesto-jimenez/gogen/imports"
+	"github.com/stretchr/testify/_codegen/internal/imports"
 )
 
 var (