Add runtime => run

runtime/source/git/git.go

@@ -0,0 +1,87 @@
+// Package git provides a git source
+package git
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/micro/go-run/source"
+	"gopkg.in/src-d/go-git.v4"
+)
+
+// Source retrieves source code
+// An empty struct can be used
+type Source struct {
+	Options source.Options
+}
+
+func (g *Source) Fetch(url string) (*source.Repository, error) {
+	purl := url
+
+	if parts := strings.Split(url, "://"); len(parts) > 1 {
+		purl = parts[len(parts)-1]
+	}
+
+	name := filepath.Base(url)
+	path := filepath.Join(g.Options.Path, purl)
+
+	_, err := git.PlainClone(path, false, &git.CloneOptions{
+		URL: url,
+	})
+	if err == nil {
+		return &source.Repository{
+			Name: name,
+			Path: path,
+			URL:  url,
+		}, nil
+	}
+
+	// repo already exists
+	if err != git.ErrRepositoryAlreadyExists {
+		return nil, err
+	}
+
+	// open repo
+	re, err := git.PlainOpen(path)
+	if err != nil {
+		return nil, err
+	}
+
+	// update it
+	if err := re.Fetch(nil); err != nil {
+		return nil, err
+	}
+
+	return &source.Repository{
+		Name: name,
+		Path: path,
+		URL:  url,
+	}, nil
+}
+
+func (g *Source) Commit(r *source.Repository) error {
+	repo := filepath.Join(r.Path)
+	re, err := git.PlainOpen(repo)
+	if err != nil {
+		return err
+	}
+	return re.Push(nil)
+}
+
+func (g *Source) String() string {
+	return "git"
+}
+
+func NewSource(opts ...source.Option) *Source {
+	options := source.Options{
+		Path: os.TempDir(),
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &Source{
+		Options: options,
+	}
+}