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initcmd.go
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initcmd.go
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package cmd
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/fs"
"os"
"regexp"
"runtime"
"strconv"
"strings"
"text/template"
"github.com/go-git/go-git/v5"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"golang.org/x/term"
"github.com/twpayne/chezmoi/v2/internal/chezmoi"
)
type initCmdConfig struct {
apply bool
data bool
depth int
exclude *chezmoi.EntryTypeSet
oneShot bool
purge bool
purgeBinary bool
ssh bool
}
var dotfilesRepoGuesses = []struct {
rx *regexp.Regexp
httpsGuessFunc func([]string) string
sshGuessFunc func([]string) string
}{
{
rx: regexp.MustCompile(`\A([-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://github.com/" + m[1] + "/dotfiles.git" },
sshGuessFunc: func(m []string) string { return "git@github.com:" + m[1] + "/dotfiles.git" },
},
{
rx: regexp.MustCompile(`\A([-0-9A-Za-z]+/[-0-9A-Za-z]+\.git)\z`),
httpsGuessFunc: func(m []string) string { return "https://github.com/" + m[1] },
sshGuessFunc: func(m []string) string { return "git@github.com:" + m[1] },
},
{
rx: regexp.MustCompile(`\A([-0-9A-Za-z]+/[-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://github.com/" + m[1] + ".git" },
sshGuessFunc: func(m []string) string { return "git@github.com:" + m[1] + ".git" },
},
{
rx: regexp.MustCompile(`\A([-.0-9A-Za-z]+)/([-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://" + m[1] + "/" + m[2] + "/dotfiles.git" },
sshGuessFunc: func(m []string) string { return "git@" + m[1] + ":" + m[2] + "/dotfiles.git" },
},
{
rx: regexp.MustCompile(`\A([-.0-9A-Za-z]+)/([-0-9A-Za-z]+/[-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://" + m[1] + "/" + m[2] + ".git" },
sshGuessFunc: func(m []string) string { return "git@" + m[1] + ":" + m[2] + ".git" },
},
{
rx: regexp.MustCompile(`\A([-.0-9A-Za-z]+)/([-0-9A-Za-z]+/[-0-9A-Za-z]+\.git)\z`),
httpsGuessFunc: func(m []string) string { return "https://" + m[1] + "/" + m[2] },
sshGuessFunc: func(m []string) string { return "git@" + m[1] + ":" + m[2] },
},
{
rx: regexp.MustCompile(`\Asr\.ht/(~[-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://git.sr.ht/" + m[1] + "/dotfiles" },
sshGuessFunc: func(m []string) string { return "git@git.sr.ht:" + m[1] + "/dotfiles" },
},
{
rx: regexp.MustCompile(`\Asr\.ht/(~[-0-9A-Za-z]+/[-0-9A-Za-z]+)\z`),
httpsGuessFunc: func(m []string) string { return "https://git.sr.ht/" + m[1] },
sshGuessFunc: func(m []string) string { return "git@git.sr.ht:" + m[1] },
},
}
func (c *Config) newInitCmd() *cobra.Command {
initCmd := &cobra.Command{
Args: cobra.MaximumNArgs(1),
Use: "init [repo]",
Short: "Setup the source directory and update the destination directory to match the target state",
Long: mustLongHelp("init"),
Example: example("init"),
RunE: c.runInitCmd,
Annotations: map[string]string{
modifiesDestinationDirectory: "true",
persistentStateMode: persistentStateModeReadWrite,
requiresSourceDirectory: "true",
runsCommands: "true",
},
}
flags := initCmd.Flags()
flags.BoolVarP(&c.init.apply, "apply", "a", c.init.apply, "update destination directory")
flags.BoolVar(&c.init.data, "data", c.init.data, "include existing template data")
flags.IntVarP(&c.init.depth, "depth", "d", c.init.depth, "create a shallow clone")
flags.VarP(c.init.exclude, "exclude", "x", "exclude entry types")
flags.BoolVar(&c.init.oneShot, "one-shot", c.init.oneShot, "one shot")
flags.BoolVarP(&c.init.purge, "purge", "p", c.init.purge, "purge config and source directories")
flags.BoolVarP(&c.init.purgeBinary, "purge-binary", "P", c.init.purgeBinary, "purge chezmoi binary")
flags.BoolVar(&c.init.ssh, "ssh", false, "use ssh instead of https for guessed dotfile repo URL")
return initCmd
}
func (c *Config) runInitCmd(cmd *cobra.Command, args []string) error {
if c.init.oneShot {
c.force = true
c.init.apply = true
c.init.depth = 1
c.init.purge = true
c.init.purgeBinary = true
}
// If the source repo does not exist then init or clone it.
switch _, err := c.baseSystem.Stat(c.SourceDirAbsPath.Join(".git")); {
case errors.Is(err, fs.ErrNotExist):
rawSourceDir, err := c.baseSystem.RawPath(c.SourceDirAbsPath)
if err != nil {
return err
}
useBuiltinGit, err := c.UseBuiltinGit.Value()
if err != nil {
return err
}
if len(args) == 0 {
if useBuiltinGit {
isBare := false
if _, err = git.PlainInit(string(rawSourceDir), isBare); err != nil {
return err
}
} else if err := c.run(c.SourceDirAbsPath, c.Git.Command, []string{"init"}); err != nil {
return err
}
} else {
dotfilesRepoURL := guessDotfilesRepoURL(args[0], c.init.ssh)
if useBuiltinGit {
isBare := false
if _, err := git.PlainClone(string(rawSourceDir), isBare, &git.CloneOptions{
URL: dotfilesRepoURL,
Depth: c.init.depth,
RecurseSubmodules: git.DefaultSubmoduleRecursionDepth,
}); err != nil {
return err
}
} else {
args := []string{
"clone",
"--recurse-submodules",
}
if c.init.depth != 0 {
args = append(args,
"--depth", strconv.Itoa(c.init.depth),
)
}
args = append(args,
dotfilesRepoURL,
string(rawSourceDir),
)
if err := c.run("", c.Git.Command, args); err != nil {
return err
}
}
}
case err != nil:
return err
}
// Find config template, execute it, and create config file.
configTemplateRelPath, ext, configTemplateContents, err := c.findConfigTemplate()
if err != nil {
return err
}
var configFileContents []byte
if configTemplateRelPath == "" {
if err := c.persistentState.Delete(chezmoi.ConfigStateBucket, configStateKey); err != nil {
return err
}
} else {
configFileContents, err = c.createConfigFile(configTemplateRelPath, configTemplateContents)
if err != nil {
return err
}
// Validate the config.
v := viper.New()
v.SetConfigType(ext)
if err := v.ReadConfig(bytes.NewBuffer(configFileContents)); err != nil {
return err
}
if err := v.Unmarshal(&Config{}, viperDecodeConfigOptions...); err != nil {
return err
}
// Write the config.
configDir := chezmoi.AbsPath(c.bds.ConfigHome).Join("chezmoi")
if err := chezmoi.MkdirAll(c.baseSystem, configDir, 0o777); err != nil {
return err
}
configPath := configDir.Join(configTemplateRelPath)
if err := c.baseSystem.WriteFile(configPath, configFileContents, 0o600); err != nil {
return err
}
configStateValue, err := json.Marshal(configState{
ConfigTemplateContentsSHA256: chezmoi.HexBytes(chezmoi.SHA256Sum(configTemplateContents)),
})
if err != nil {
return err
}
if err := c.persistentState.Set(chezmoi.ConfigStateBucket, configStateKey, configStateValue); err != nil {
return err
}
}
// Reload config if it was created.
if configTemplateRelPath != "" {
v := viper.New()
v.SetConfigType(ext)
if err := v.ReadConfig(bytes.NewBuffer(configFileContents)); err != nil {
return err
}
if err := v.Unmarshal(c, viperDecodeConfigOptions...); err != nil {
return err
}
}
// Apply.
if c.init.apply {
if err := c.applyArgs(c.destSystem, c.DestDirAbsPath, noArgs, applyArgsOptions{
include: chezmoi.NewEntryTypeSet(chezmoi.EntryTypesAll).Sub(c.init.exclude),
recursive: false,
umask: c.Umask,
preApplyFunc: c.defaultPreApplyFunc,
}); err != nil {
return err
}
}
// Purge.
if c.init.purge {
if err := c.doPurge(&purgeOptions{
binary: runtime.GOOS != "windows" && c.init.purgeBinary,
}); err != nil {
return err
}
}
return nil
}
// createConfigFile creates a config file using a template and returns its
// contents.
func (c *Config) createConfigFile(filename chezmoi.RelPath, data []byte) ([]byte, error) {
funcMap := make(template.FuncMap)
chezmoi.RecursiveMerge(funcMap, c.templateFuncs)
chezmoi.RecursiveMerge(funcMap, map[string]interface{}{
"promptBool": c.promptBool,
"promptInt": c.promptInt,
"promptString": c.promptString,
"stdinIsATTY": c.stdinIsATTY,
"writeToStdout": c.writeToStdout,
})
t, err := template.New(string(filename)).Funcs(funcMap).Parse(string(data))
if err != nil {
return nil, err
}
sb := strings.Builder{}
templateData := c.defaultTemplateData()
if c.init.data {
chezmoi.RecursiveMerge(templateData, c.Data)
}
if err = t.Execute(&sb, templateData); err != nil {
return nil, err
}
return []byte(sb.String()), nil
}
func (c *Config) promptBool(field string) bool {
value, err := parseBool(c.promptString(field))
if err != nil {
returnTemplateError(err)
return false
}
return value
}
func (c *Config) promptInt(field string) int64 {
value, err := strconv.ParseInt(c.promptString(field), 10, 64)
if err != nil {
returnTemplateError(err)
return 0
}
return value
}
func (c *Config) promptString(field string) string {
value, err := c.readLine(fmt.Sprintf("%s? ", field))
if err != nil {
returnTemplateError(err)
return ""
}
return strings.TrimSpace(value)
}
func (c *Config) stdinIsATTY() bool {
file, ok := c.stdin.(*os.File)
if !ok {
return false
}
return term.IsTerminal(int(file.Fd()))
}
func (c *Config) writeToStdout(args ...string) string {
for _, arg := range args {
if _, err := c.stdout.Write([]byte(arg)); err != nil {
panic(err)
}
}
return ""
}
// guessDotfilesRepoURL guesses the user's dotfile repo from arg.
func guessDotfilesRepoURL(arg string, ssh bool) string {
for _, dotfileRepoGuess := range dotfilesRepoGuesses {
switch {
case ssh:
if dotfileRepoGuess.sshGuessFunc != nil {
if m := dotfileRepoGuess.rx.FindStringSubmatch(arg); m != nil {
return dotfileRepoGuess.sshGuessFunc(m)
}
}
default:
if dotfileRepoGuess.rx.MatchString(arg) {
if m := dotfileRepoGuess.rx.FindStringSubmatch(arg); m != nil {
return dotfileRepoGuess.httpsGuessFunc(m)
}
}
}
}
return arg
}