mirror of
https://github.com/dolthub/dolt.git
synced 2026-01-25 10:26:22 -06:00
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Copyright 2019-2022 Dolthub, Inc.
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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 dolt_builder
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import (
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"context"
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"fmt"
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"os"
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"strings"
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)
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// GitVersion runs git version
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func GitVersion(ctx context.Context) error {
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checkGit := ExecCommand(ctx, "git", "version")
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err := checkGit.Run()
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if err != nil {
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helpStr := "dolt-builder requires git.\n" +
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"Make sure git is installed and on your PATH.\n" +
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"git version: %v\n"
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return fmt.Errorf(helpStr, err)
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}
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return nil
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}
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// GitClone clones the dolt repo into `${dir}/dolt.git`
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func GitCloneBare(ctx context.Context, dir string) error {
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clone := ExecCommand(ctx, "git", "clone", "--bare", GithubDolt)
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clone.Dir = dir
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return clone.Run()
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}
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func CommitArg(c string) string {
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if IsCommit(c) {
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return c
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}
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if strings.HasPrefix(c, "v") {
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return "tags/" + c
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}
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return "tags/v" + c
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}
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// GitCheckoutTree checks out `commit` from the Git repo at
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// `repoDir` into `toDir`. It does it without copying the entire
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// git repository. First we run `git read-tree` with a GIT_INDEX_FILE set to
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// `$toDir/.buildindex`, which gets an index for the commit fully populated
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// into the file. Then we run `git checkout-index -a` referencing the same
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// INDEX_FILE, which populates the current working directory (`toDir`) with the
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// contents of the index file.
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func GitCheckoutTree(ctx context.Context, repoDir string, toDir string, commit string) error {
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env := os.Environ()
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env = append(env, "GIT_DIR="+repoDir)
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env = append(env, "GIT_INDEX_FILE=.buildindex")
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env = append(env, "GIT_WORK_TREE=.")
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read := ExecCommand(ctx, "git", "read-tree", CommitArg(commit))
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read.Dir = toDir
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read.Env = env
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if err := read.Run(); err != nil {
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return err
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}
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checkout := ExecCommand(ctx, "git", "checkout-index", "-a")
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checkout.Dir = toDir
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checkout.Env = env
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return checkout.Run()
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}
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// IsCommit returns true if a commit is not a tag
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func IsCommit(commit string) bool {
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return strings.IndexByte(commit, '.') == -1
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}
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