/
gomod.go
71 lines (61 loc) · 1.83 KB
/
gomod.go
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// Copyright 2016-2019, Pulumi Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tfgen
import (
"io/ioutil"
"os"
"path/filepath"
"github.com/pkg/errors"
"golang.org/x/mod/modfile"
)
func LoadGoMod() (*modfile.File, error) {
exePath, err := os.Getwd()
if err != nil {
return nil, errors.Wrap(err, "error determining working directory")
}
moduleRoot := findModuleRoot(exePath)
if moduleRoot == "" {
// Some provider repos have a "provider" module, rather than a
// module at the root of the repo.
moduleRoot = findModuleRoot(filepath.Join(exePath, "provider"))
if moduleRoot == "" {
return nil, errors.New("cannot find module root")
}
}
gomodContent, err := ioutil.ReadFile(filepath.Join(moduleRoot, "go.mod"))
if err != nil {
return nil, errors.Wrap(err, "error reading go.mod")
}
file, err := modfile.Parse("go.mod", gomodContent, nil)
if err != nil {
return nil, errors.Wrap(err, "error parsing go.mod")
}
return file, nil
}
// Copyright 2018 The Go Authors. - Taken from src/cmd/go/internal/modload/init.go
func findModuleRoot(dir string) (root string) {
dir = filepath.Clean(dir)
// Look for enclosing go.mod.
for {
if fi, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil && !fi.IsDir() {
return dir
}
d := filepath.Dir(dir)
if d == dir {
break
}
dir = d
}
return ""
}