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https://github.com/ent/ent.git
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c53b45ddb0
* all: use %w instead of %v for nested errors with fmt.Errorf * all: update generated code to use %w instead of %v for error wrapping
56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// Copyright 2019-present Facebook Inc. All rights reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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package base
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import (
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"fmt"
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"os"
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"path"
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"path/filepath"
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"golang.org/x/tools/go/packages"
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)
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// DefaultConfig for loading Go base.
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var DefaultConfig = &packages.Config{Mode: packages.NeedName}
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// PkgPath returns the Go package name for given target path.
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// Even if the existing path is not exist yet in the filesystem.
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//
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// If base.Config is nil, DefaultConfig will be used to load base.
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func PkgPath(config *packages.Config, target string) (string, error) {
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if config == nil {
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config = DefaultConfig
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}
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pathCheck, err := filepath.Abs(target)
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if err != nil {
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return "", err
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}
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var parts []string
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if _, err := os.Stat(pathCheck); os.IsNotExist(err) {
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parts = append(parts, filepath.Base(pathCheck))
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pathCheck = filepath.Dir(pathCheck)
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}
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// Try maximum 2 directories above the given
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// target to find the root package or module.
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for i := 0; i < 2; i++ {
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pkgs, err := packages.Load(config, pathCheck)
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if err != nil {
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return "", fmt.Errorf("load package info: %w", err)
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}
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if len(pkgs) == 0 || len(pkgs[0].Errors) != 0 {
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parts = append(parts, filepath.Base(pathCheck))
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pathCheck = filepath.Dir(pathCheck)
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continue
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}
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pkgPath := pkgs[0].PkgPath
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for j := len(parts) - 1; j >= 0; j-- {
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pkgPath = path.Join(pkgPath, parts[j])
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}
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return pkgPath, nil
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}
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return "", fmt.Errorf("root package or module was not found for: %s", target)
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}
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