golang/dep

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package dep

import (
    "os"
    "path/filepath"

    "github.com/golang/dep/gps"
    "github.com/golang/dep/internal/fs"
)

// Analyzer implements gps.ProjectAnalyzer.
type Analyzer struct{}

// HasDepMetadata determines if a dep manifest exists at the specified path.
func (a Analyzer) HasDepMetadata(path string) bool {
    mf := filepath.Join(path, ManifestName)
    fileOK, err := fs.IsRegular(mf)
    return err == nil && fileOK
}

// DeriveManifestAndLock reads and returns the manifest at path/ManifestName or nil if one is not found.
// The Lock is always nil for now.
func (a Analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Manifest, gps.Lock, error) {
    if !a.HasDepMetadata(path) {
        return nil, nil, nil
    }

    f, err := os.Open(filepath.Join(path, ManifestName))
    if err != nil {
        return nil, nil, err
    }
    defer f.Close()

    // Ignore warnings irrelevant to user.
    m, _, err := readManifest(f)
    if err != nil {
        return nil, nil, err
    }

    return m, nil, nil
}

// Info returns Analyzer's name and version info.
func (a Analyzer) Info() gps.ProjectAnalyzerInfo {
    return gps.ProjectAnalyzerInfo{
        Name:    "dep",
        Version: 1,
    }
}