mirror of https://github.com/restic/restic.git
91 lines
2.3 KiB
Go
91 lines
2.3 KiB
Go
// Copyright 2018 Microsoft Corporation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package repo
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import (
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"errors"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"strings"
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)
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// WorkingTree encapsulates a git repository.
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type WorkingTree struct {
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dir string
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}
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// Get returns a WorkingTree for the specified directory. If the directory is not the
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// root of a git repository the directory hierarchy is walked to find the root (i.e. the
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// directory where the .git dir resides).
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func Get(dir string) (wt WorkingTree, err error) {
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orig := dir
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for found := false; !found; {
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var fi []os.FileInfo
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fi, err = ioutil.ReadDir(dir)
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if err != nil {
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return
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}
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// look for the .git directory
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for _, f := range fi {
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if f.Name() == ".git" {
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found = true
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break
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}
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}
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if !found {
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// not the root of the repo, move to parent directory
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i := strings.LastIndexByte(dir, os.PathSeparator)
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if i < 0 {
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err = fmt.Errorf("failed to find repo root under '%s'", orig)
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return
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}
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dir = dir[:i]
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}
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}
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wt.dir = dir
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return
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}
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// Clone calls "git clone", cloning the working tree into the specified directory.
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// The returned WorkingTree points to the clone of the repository.
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func (wt WorkingTree) Clone(dest string) (result WorkingTree, err error) {
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cmd := exec.Command("git", "clone", fmt.Sprintf("file://%s", wt.dir), dest)
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output, err := cmd.CombinedOutput()
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if err != nil {
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err = errors.New(string(output))
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return
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}
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result.dir = dest
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return
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}
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// Checkout calls "git checkout" with the specified hash.
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func (wt WorkingTree) Checkout(hash string) error {
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cmd := exec.Command("git", "checkout", hash)
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cmd.Dir = wt.dir
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output, err := cmd.CombinedOutput()
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if err != nil {
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return errors.New(string(output))
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}
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return nil
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}
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// Root returns the root directory of the working tree.
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func (wt WorkingTree) Root() string {
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return wt.dir
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}
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