Fix windows gopath issue

appveyor.yml

@@ -0,0 +1,34 @@
+version: "{build}"
+
+# Source Config
+
+skip_branch_with_pr: true
+clone_folder: c:\gopath\src\github.com\vektah\gqlgen
+
+# Build host
+
+environment:
+  GOPATH: c:\gopath
+  GOVERSION: 1.10
+  PATH: '%PATH%;c:\gopath\bin'
+
+init:
+  - git config --global core.autocrlf input
+
+# Build
+
+install:
+  # Install the specific Go version.
+  - rmdir c:\go /s /q
+  - appveyor DownloadFile https://storage.googleapis.com/golang/go%GOVERSION%.windows-amd64.msi
+  - msiexec /i go%GOVERSION%.windows-amd64.msi /q
+  - go version
+
+build: false
+deploy: false
+
+test_script:
+  - go get -u github.com/vektah/gorunpkg github.com/golang/dep/cmd/dep
+  - dep ensure -vendor-only
+  - go generate ./...
+  - go test ./...

codegen/config.go

@@ -98,9 +98,9 @@ func (c *PackageConfig) normalize() error {
 }
 
 func (c *PackageConfig) ImportPath() string {
-	dir := c.Dir()
+	dir := filepath.ToSlash(c.Dir())
 	for _, gopath := range filepath.SplitList(build.Default.GOPATH) {
-		gopath = filepath.Join(gopath, "src") + string(os.PathSeparator)
+		gopath = filepath.ToSlash(gopath) + "/src/"
 		if len(gopath) > len(dir) {
 			continue
 		}
@@ -109,7 +109,7 @@ func (c *PackageConfig) ImportPath() string {
 			break
 		}
 	}
-	return filepath.ToSlash(dir)
+	return dir
 }
 
 func (c *PackageConfig) Dir() string {
@@ -167,7 +167,8 @@ func findCfg() (string, error) {
 	}
 
 	cfg := findCfgInDir(dir)
-	for cfg == "" && dir != "/" {
+
+	for cfg == "" && dir != filepath.Dir(dir) {
 		dir = filepath.Dir(dir)
 		cfg = findCfgInDir(dir)
 	}

codegen/config_test.go

@@ -13,7 +13,7 @@ import (
 func TestLoadConfig(t *testing.T) {
 	t.Run("config does not exist", func(t *testing.T) {
 		_, err := LoadConfig("doesnotexist.yml")
-		require.EqualError(t, err, "unable to read config: open doesnotexist.yml: no such file or directory")
+		require.Error(t, err)
 	})
 
 	t.Run("malformed config", func(t *testing.T) {