113 lines
2.7 KiB
Go
113 lines
2.7 KiB
Go
// Package git contains various commands that shell out to git
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package git
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import (
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"errors"
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"fmt"
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"github.com/rubyist/tracerx"
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"io"
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"os/exec"
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"strings"
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)
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func LsRemote(remote, remoteRef string) (string, error) {
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if remote == "" {
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return "", errors.New("remote required")
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}
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if remoteRef == "" {
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return simpleExec(nil, "git", "ls-remote", remote)
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}
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return simpleExec(nil, "git", "ls-remote", remote, remoteRef)
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}
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func CurrentRef() (string, error) {
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return simpleExec(nil, "git", "rev-parse", "HEAD")
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}
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func CurrentBranch() (string, error) {
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return simpleExec(nil, "git", "rev-parse", "--abbrev-ref", "HEAD")
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}
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func CurrentRemoteRef() (string, error) {
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remote, err := CurrentRemote()
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if err != nil {
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return "", err
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}
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return simpleExec(nil, "git", "rev-parse", remote)
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}
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func CurrentRemote() (string, error) {
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branch, err := CurrentBranch()
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if err != nil {
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return "", err
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}
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if branch == "HEAD" {
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return "", errors.New("not on a branch")
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}
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remote := Config.Find(fmt.Sprintf("branch.%s.remote", branch))
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if remote == "" {
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return "", errors.New("remote not found")
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}
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return remote + "/" + branch, nil
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}
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type gitConfig struct {
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}
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var Config = &gitConfig{}
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// Find returns the git config value for the key
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func (c *gitConfig) Find(val string) string {
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output, _ := simpleExec(nil, "git", "config", val)
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return output
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}
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// SetGlobal sets the git config value for the key in the global config
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func (c *gitConfig) SetGlobal(key, val string) {
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simpleExec(nil, "git", "config", "--global", "--add", key, val)
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}
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// SetGlobal removes the git config value for the key from the global config
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func (c *gitConfig) UnsetGlobal(key string) {
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simpleExec(nil, "git", "config", "--global", "--unset", key)
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}
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// List lists all of the git config values
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func (c *gitConfig) List() (string, error) {
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return simpleExec(nil, "git", "config", "-l")
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}
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// ListFromFile lists all of the git config values in the given config file
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func (c *gitConfig) ListFromFile() (string, error) {
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return simpleExec(nil, "git", "config", "-l", "-f", ".gitconfig")
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}
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// Version returns the git version
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func (c *gitConfig) Version() (string, error) {
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return simpleExec(nil, "git", "version")
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}
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// simpleExec is a small wrapper around os/exec.Command. If the passed stdin
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// is not nil it will be hooked up to the subprocess stdin.
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func simpleExec(stdin io.Reader, name string, arg ...string) (string, error) {
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tracerx.Printf("run_command: '%s' %s", name, strings.Join(arg, " "))
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cmd := exec.Command(name, arg...)
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if stdin != nil {
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cmd.Stdin = stdin
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}
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output, err := cmd.Output()
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if _, ok := err.(*exec.ExitError); ok {
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return "", nil
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} else if err != nil {
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return fmt.Sprintf("Error running %s %s", name, arg), err
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}
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return strings.Trim(string(output), " \n"), nil
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}
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