Add godepFile load and convert

cmd/dep/godep_config.go

@@ -0,0 +1,102 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"path/filepath"
+
+	"github.com/golang/dep"
+	"github.com/golang/dep/internal/gps"
+	"github.com/pkg/errors"
+)
+
+type godepFile struct {
+	json    godepJSON
+	loggers *dep.Loggers
+}
+
+func newGodepFile(loggers *dep.Loggers) *godepFile {
+	return &godepFile{loggers: loggers}
+}
+
+type godepJSON struct {
+	Name    string         `json:"ImportPath"`
+	Imports []godepPackage `json:"Deps"`
+}
+
+type godepPackage struct {
+	ImportPath string `json:"ImportPath"`
+	Rev        string `json:"Rev"`
+	Comment    string `json:"Comment"`
+}
+
+// load parses Godeps.json in projectDir and unmarshals the json to godepFile.json
+func (g *godepFile) load(projectDir string) error {
+	j := filepath.Join(projectDir, godepJSONpath)
+	if g.loggers.Verbose {
+		g.loggers.Err.Printf("godep: Loading %s", j)
+	}
+
+	raw, err := ioutil.ReadFile(j)
+	if err != nil {
+		return errors.Wrapf(err, "Unable to read %s", j)
+	}
+	err = json.Unmarshal(raw, &g.json)
+
+	return nil
+}
+
+func (g *godepFile) convert(projectName string, sm gps.SourceManager) (*dep.Manifest, *dep.Lock, error) {
+	// Create empty manifest and lock
+	manifest := &dep.Manifest{
+		Dependencies: make(gps.ProjectConstraints),
+	}
+	lock := &dep.Lock{}
+
+	// Parse through each import and add them to manifest and lock
+	for _, pkg := range g.json.Imports {
+		// ImportPath must not be empty
+		if pkg.ImportPath == "" {
+			err := errors.New("godep: Invalid godep configuration, ImportPath is required")
+			return nil, nil, err
+		}
+
+		if pkg.Comment != "" {
+			// If there's a comment, use it to create project constraint
+			pc, err := g.buildProjectConstraint(pkg, sm)
+			if err != nil {
+				return nil, nil, err
+			}
+			manifest.Dependencies[pc.Ident.ProjectRoot] = gps.ProjectProperties{Source: pc.Ident.Source, Constraint: pc.Constraint}
+		}
+
+		if pkg.Rev != "" {
+			// Use the revision to create lock project
+			lp := g.buildLockedProject(pkg, manifest)
+			lock.P = append(lock.P, lp)
+		}
+	}
+
+	return manifest, lock, nil
+}
+
+func (g *godepFile) buildProjectConstraint(pkg godepPackage, sm gps.SourceManager) (pc gps.ProjectConstraint, err error) {
+	pc.Ident = gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot(pkg.ImportPath), Source: pkg.ImportPath}
+	pc.Constraint, err = deduceConstraint(pkg.Comment, pc.Ident, sm)
+	return
+}
+
+func (g *godepFile) buildLockedProject(pkg godepPackage, manifest *dep.Manifest) gps.LockedProject {
+	var ver gps.Version
+	id := gps.ProjectIdentifier{ProjectRoot: gps.ProjectRoot(pkg.ImportPath), Source: pkg.ImportPath}
+	c, has := manifest.Dependencies[id.ProjectRoot]
+	if has {
+		// Create PairedVersion if constraint details are available
+		version := gps.NewVersion(c.Constraint.String())
+		ver = version.Is(gps.Revision(pkg.Rev))
+	} else {
+		ver = gps.Revision(pkg.Rev)
+	}
+
+	return gps.NewLockedProject(id, ver, nil)
+}

cmd/dep/godep_config_test.go

@@ -0,0 +1,149 @@
+package main
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/golang/dep"
+	"github.com/golang/dep/internal/test"
+)
+
+const testGodepProjectRoot = "github.com/golang/notexist"
+
+func TestGodepJSONLoad(t *testing.T) {
+	// This is same as cmd/dep/testdata/Godeps.json
+	wantJSON := godepJSON{
+		Name: "github.com/golang/notexist",
+		Imports: []godepPackage{
+			{
+				ImportPath: "github.com/sdboyer/deptest",
+				Rev:        "3f4c3bea144e112a69bbe5d8d01c1b09a544253f",
+			},
+			{
+				ImportPath: "github.com/sdboyer/deptestdos",
+				Rev:        "5c607206be5decd28e6263ffffdcee067266015e",
+				Comment:    "v2.0.0",
+			},
+		},
+	}
+
+	h := test.NewHelper(t)
+	defer h.Cleanup()
+
+	h.TempCopy(filepath.Join(testGodepProjectRoot, godepJSONpath), "Godeps.json")
+
+	projectRoot := h.Path(testGodepProjectRoot)
+
+	g := &godepFile{
+		loggers: &dep.Loggers{
+			Out:     log.New(os.Stderr, "", 0),
+			Err:     log.New(os.Stderr, "", 0),
+			Verbose: true,
+		},
+	}
+	err := g.load(projectRoot)
+	if err != nil {
+		t.Fatalf("Error while loading... %v", err)
+	}
+
+	if g.json.Name != wantJSON.Name {
+		t.Fatalf("Expected project name to be %v, but got %v", wantJSON.Name, g.json.Name)
+	}
+
+	if !equalImports(g.json.Imports, wantJSON.Imports) {
+		t.Fatalf("Expected imports to be equal. \n\t(GOT): %v\n\t(WNT): %v", g.json.Imports, wantJSON.Imports)
+	}
+}
+
+func TestGodepConvertProject(t *testing.T) {
+	loggers := &dep.Loggers{
+		Out:     log.New(os.Stdout, "", 0),
+		Err:     log.New(os.Stderr, "", 0),
+		Verbose: true,
+	}
+
+	f := godepFile{
+		loggers: loggers,
+		json: godepJSON{
+			Name: "github.com/foo/bar",
+			Imports: []godepPackage{
+				{
+					ImportPath: "github.com/sdboyer/deptest",
+					Rev:        "6a741be0cc55ecbe4f45690ebfd606a956d5f14a",
+					Comment:    "v1.0.0",
+				},
+			},
+		},
+	}
+
+	manifest, lock, err := f.convert("", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	d, ok := manifest.Dependencies["github.com/sdboyer/deptest"]
+	if !ok {
+		t.Fatal("Expected the manifest to have a dependency for 'github.com/sdboyer/deptest' but got none")
+	}
+
+	v := d.Constraint.String()
+	if v != "v1.0.0" {
+		t.Fatalf("Expected manifest constraint to be master, got %s", v)
+	}
+
+	p := lock.P[0]
+	if p.Ident().ProjectRoot != "github.com/sdboyer/deptest" {
+		t.Fatalf("Expected the lock to have a project for 'github.com/sdboyer/deptest' but got '%s'", p.Ident().ProjectRoot)
+	}
+
+	lv := p.Version().String()
+	if lv != "v1.0.0" {
+		t.Fatalf("Expected locked revision to be 'v1.0.0', got %s", lv)
+	}
+}
+
+func TestGodepConvertBadInput_EmptyPackageName(t *testing.T) {
+	loggers := &dep.Loggers{
+		Out:     log.New(os.Stdout, "", 0),
+		Err:     log.New(os.Stderr, "", 0),
+		Verbose: true,
+	}
+
+	f := godepFile{
+		loggers: loggers,
+		json: godepJSON{
+			Imports: []godepPackage{{ImportPath: ""}},
+		},
+	}
+
+	_, _, err := f.convert("", nil)
+	if err == nil {
+		t.Fatal("Expected conversion to fail because the ImportPath is empty")
+	}
+}
+
+// Compares two slices of godepPackage and checks if they are equal.
+func equalImports(a, b []godepPackage) bool {
+
+	if a == nil && b == nil {
+		return true
+	}
+
+	if a == nil || b == nil {
+		return false
+	}
+
+	if len(a) != len(b) {
+		return false
+	}
+
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+
+	return true
+}

cmd/dep/godep_importer.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+
+	"github.com/golang/dep"
+	"github.com/golang/dep/internal/gps"
+)
+
+// Godeps/Godeps.json
+const godepJSONpath = "Godeps/Godeps.json"
+
+type godepImporter struct {
+	loggers *dep.Loggers
+	sm      gps.SourceManager
+}
+
+func newGodepImporter(loggers *dep.Loggers, sm gps.SourceManager) *godepImporter {
+	return &godepImporter{loggers: loggers, sm: sm}
+}
+
+func (i godepImporter) HasConfig(dir string) bool {
+	y := filepath.Join(dir, godepJSONpath)
+	if _, err := os.Stat(y); err != nil {
+		return false
+	}
+
+	return true
+}
+
+func (i godepImporter) Import(dir string, pr gps.ProjectRoot) (*dep.Manifest, *dep.Lock, error) {
+	files := newGlideFiles(i.loggers)
+	err := files.load(dir)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return files.convert(string(pr), i.sm)
+}

cmd/dep/testdata/Godeps.json

@@ -0,0 +1,16 @@
+{
+  "ImportPath": "github.com/golang/notexist",
+  "GoVersion": "go1.8",
+  "GodepVersion": "vXYZ",
+  "Deps": [
+    {
+      "ImportPath": "github.com/sdboyer/deptest",
+      "Rev": "3f4c3bea144e112a69bbe5d8d01c1b09a544253f"
+    },
+    {
+      "ImportPath": "github.com/sdboyer/deptestdos",
+      "Comment": "v2.0.0",
+      "Rev": "5c607206be5decd28e6263ffffdcee067266015e"
+    }
+  ]
+}