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lfs.go
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lfs.go
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package client
import (
"bytes"
"fmt"
"io"
"io/fs"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/spf13/cobra"
)
const lfsName = `.lfs`
func createLfsCommands() *cobra.Command {
// GIT 仓库根目录
var root string
lfsCmd := &cobra.Command{
Short: `大文件操作命令。`,
Use: `lfs`,
PersistentPreRun: func(cmd *cobra.Command, args []string) {
buf := bytes.NewBuffer(nil)
if err := spawnWithOutput(`git`, []string{`rev-parse`, `--show-toplevel`}, ".", "", buf); err != nil {
log.Fatalln(err)
}
dir := strings.TrimSpace(buf.String())
root = dir
},
}
lfsAddCmd := &cobra.Command{
Short: `添加文件到大文件仓库。`,
Use: `add <files...>`,
Args: cobra.MinimumNArgs(1),
Run: func(cmd *cobra.Command, args []string) {
config, err := ReadPostConfig(ConfigFileName)
if err != nil {
log.Fatalln(err)
}
if config.ID < 0 {
log.Fatalln(`无效文章编号。`)
}
// TODO 提供的文件可能包含目录。
dir := filepath.Join(root, lfsName, fmt.Sprint(config.ID))
if err := os.MkdirAll(dir, 0755); err != nil {
log.Fatalln(err, dir)
}
for _, f := range args {
cleaned := filepath.Clean(f)
if filepath.IsAbs(cleaned) {
log.Fatalln(`错误的路径。`)
}
stat, err := os.Lstat(f)
if err != nil {
log.Fatalln(err)
}
if stat.IsDir() {
log.Fatalln(`不支持目录。`)
}
if stat.Mode().Type() == fs.ModeSymlink {
log.Println(`忽略软连接文件。`)
continue
}
if err := os.Rename(cleaned, dir); err != nil {
log.Fatalln(err)
}
if err := os.Symlink(filepath.Join(dir, cleaned), filepath.Base(cleaned)); err != nil {
log.Fatalln(err)
}
}
},
}
lfsCmd.AddCommand(lfsAddCmd)
lfsCommitCmd := &cobra.Command{
Short: `提交保存。`,
Use: `commit`,
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, args []string) {
config, err := ReadPostConfig(ConfigFileName)
if err != nil {
log.Fatalln(err)
}
if config.ID < 0 {
log.Fatalln(`无效文章编号。`)
}
// TODO 提供的文件可能包含目录。
dir := filepath.Join(lfsName, fmt.Sprint(config.ID))
if err := spawn(`git`, []string{`add`, `.`}, dir, ""); err != nil {
log.Fatalln(err)
}
if err := spawn(`git`, []string{`commit`, `-m`, `by lfs cmd`}, dir, ""); err != nil {
log.Fatalln(err)
}
if err := spawn(`git`, []string{`add`}, filepath.Join(root, lfsName), ""); err != nil {
log.Fatalln(err)
}
},
}
lfsCmd.AddCommand(lfsCommitCmd)
return lfsCmd
}
func spawn(name string, args []string, dir string, input string) error {
return spawnWithOutput(name, args, dir, input, os.Stdout)
}
func spawnWithOutput(name string, args []string, dir string, input string, output io.Writer) error {
cmd := exec.Command(name, args...)
cmd.Dir = dir
cmd.Stdin = strings.NewReader(input)
cmd.Stdout = output
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
return nil
}