Initial commit

pkg/git.go

@@ -0,0 +1,68 @@
+// Copyright 2018 jsonnet-bundler authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pkg
+
+import (
+	"bytes"
+	"context"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/jsonnet-bundler/jsonnet-bundler/spec"
+)
+
+type GitPackage struct {
+	Source *spec.GitSource
+}
+
+func NewGitPackage(source *spec.GitSource) Interface {
+	return &GitPackage{
+		Source: source,
+	}
+}
+
+func (p *GitPackage) Install(ctx context.Context, dir, version string) (string, error) {
+	cmd := exec.CommandContext(ctx, "git", "clone", p.Source.Remote, dir)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	cmd = exec.CommandContext(ctx, "git", "checkout", version)
+	cmd.Stdin = os.Stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Dir = dir
+	err = cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	b := bytes.NewBuffer(nil)
+	cmd = exec.CommandContext(ctx, "git", "rev-parse", "HEAD")
+	cmd.Stdout = b
+	cmd.Dir = dir
+	err = cmd.Run()
+	if err != nil {
+		return "", err
+	}
+
+	commitHash := strings.TrimSpace(b.String())
+	return commitHash, nil
+}