Add analyzer and getter for source manager

analyzer.go

@@ -0,0 +1,22 @@
+// 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 main
+
+import (
+	"github.com/Masterminds/semver"
+	"github.com/sdboyer/gps"
+)
+
+type analyzer struct{}
+
+func (a analyzer) DeriveManifestAndLock(path string, n gps.ProjectRoot) (gps.Manifest, gps.Lock, error) {
+	// TODO initial impl would just be looking for our own manifest and lock
+	return nil, nil, nil
+}
+
+func (a analyzer) Info() (name string, version *semver.Version) {
+	v, _ := semver.NewVersion("v0.0.1")
+	return "example-analyzer", v
+}

sm.go

@@ -0,0 +1,24 @@
+// 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 main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/sdboyer/gps"
+)
+
+func getSourceManager() (*gps.SourceMgr, error) {
+	gopath := os.Getenv("GOPATH")
+	if gopath == "" {
+		return nil, fmt.Errorf("GOPATH is not set")
+	}
+	// Use the first entry in GOPATH for the depcache
+	first := filepath.SplitList(gopath)[0]
+
+	return gps.NewSourceManager(analyzer{}, filepath.Join(first, "depcache"))
+}