Use Go modules for gofiles

gofiles/go.mod

@@ -0,0 +1,8 @@
+module github.com/nmiyake/pkg/gofiles
+
+go 1.13
+
+require (
+	github.com/nmiyake/pkg/dirs v1.0.0
+	github.com/stretchr/testify v1.4.0
+)

gofiles/go.sum

@@ -0,0 +1,13 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/nmiyake/pkg/dirs v1.0.0 h1:pYeIw1wH7jh5/ew8naGE4Q56byJG7Uyi8PwwhVe/MTg=
+github.com/nmiyake/pkg/dirs v1.0.0/go.mod h1:r6/PkZ3CA1szGfQkxcHheEjBWi6Zu6jLb+lQmRXEyvM=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

gofiles/godel/config/godel.yml

@@ -3,10 +3,13 @@ plugins:
     - https://palantir.bintray.com/releases/{{GroupPath}}/{{Product}}/{{Version}}/{{Product}}-{{Version}}-{{OS}}-{{Arch}}.tgz
   plugins:
     - locator:
-        id: com.palantir.godel-dep-plugin:dep-plugin:1.1.0
+        id: com.palantir.godel-mod-plugin:mod-plugin:1.0.1
         checksums:
-          darwin-amd64: 946b0def510a7e94b46bb635a67f00c05243505e2a2ef9b0b7dab45b0437be1f
-          linux-amd64: cc2729e7f25c0121f841e237238c11514ee4c1376c458a1c4997ee86de17b209
+          darwin-amd64: df22922bacfe4e4e7c255607a0aace176205f04ae001f3746276fcfab1780e01
+          linux-amd64: a2697b3d504bb37c2fd8831a66c7014927a6d94e4dfb9765b4764354370a1ab6
+environment:
+  GO111MODULE: "on"
+  GOFLAGS: "-mod=vendor"
 exclude:
   names:
     - "\\..+"

gofiles/gofiles_test.go

@@ -23,6 +23,7 @@
 package gofiles_test
 
 import (
+	"os"
 	"os/exec"
 	"testing"
 
@@ -33,6 +34,12 @@ import (
 )
 
 func TestWriteGoFiles(t *testing.T) {
+	restoreEnvVars := setEnvVars(map[string]string{
+		"GO111MODULE": "off",
+		"GOFLAGS":     "",
+	})
+	defer restoreEnvVars()
+
 	dir, cleanup, err := dirs.TempDir(".", "")
 	require.NoError(t, err)
 	defer cleanup()
@@ -72,3 +79,29 @@ func Baz() string {
 
 	assert.Equal(t, "bar baz\n", string(output))
 }
+
+func setEnvVars(envVars map[string]string) func() {
+	origVars := make(map[string]string)
+	var unsetVars []string
+	for k := range envVars {
+		val, ok := os.LookupEnv(k)
+		if !ok {
+			unsetVars = append(unsetVars, k)
+			continue
+		}
+		origVars[k] = val
+	}
+
+	for k, v := range envVars {
+		_ = os.Setenv(k, v)
+	}
+
+	return func() {
+		for _, k := range unsetVars {
+			_ = os.Unsetenv(k)
+		}
+		for k, v := range origVars {
+			_ = os.Setenv(k, v)
+		}
+	}
+}