159 lines
3.0 KiB
Go
159 lines
3.0 KiB
Go
package commands
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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"github.com/github/git-lfs/lfs"
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"github.com/github/git-lfs/vendor/_nuts/github.com/spf13/cobra"
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)
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var (
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trackCmd = &cobra.Command{
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Use: "track",
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Short: "Manipulate .gitattributes",
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Run: trackCommand,
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}
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)
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func trackCommand(cmd *cobra.Command, args []string) {
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if lfs.LocalGitDir == "" {
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Print("Not a git repository.")
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os.Exit(128)
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}
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lfs.InstallHooks(false)
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knownPaths := findPaths()
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if len(args) == 0 {
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Print("Listing tracked paths")
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for _, t := range knownPaths {
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Print(" %s (%s)", t.Path, t.Source)
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}
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return
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}
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addTrailingLinebreak := needsTrailingLinebreak(".gitattributes")
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attributesFile, err := os.OpenFile(".gitattributes", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0660)
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if err != nil {
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Print("Error opening .gitattributes file")
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return
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}
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if addTrailingLinebreak {
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if _, err := attributesFile.WriteString("\n"); err != nil {
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Print("Error writing to .gitattributes")
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}
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}
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for _, t := range args {
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isKnownPath := false
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for _, k := range knownPaths {
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if t == k.Path {
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isKnownPath = true
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break
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}
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}
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if isKnownPath {
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Print("%s already supported", t)
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continue
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}
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encodedArg := strings.Replace(t, " ", "[[:space:]]", -1)
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_, err := attributesFile.WriteString(fmt.Sprintf("%s filter=lfs diff=lfs merge=lfs -crlf\n", encodedArg))
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if err != nil {
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Print("Error adding path %s", t)
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continue
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}
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Print("Tracking %s", t)
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}
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attributesFile.Close()
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}
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type mediaPath struct {
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Path string
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Source string
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}
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func findAttributeFiles() []string {
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paths := make([]string, 0)
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repoAttributes := filepath.Join(lfs.LocalGitDir, "info", "attributes")
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if _, err := os.Stat(repoAttributes); err == nil {
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paths = append(paths, repoAttributes)
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}
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filepath.Walk(lfs.LocalWorkingDir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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if !info.IsDir() && (filepath.Base(path) == ".gitattributes") {
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paths = append(paths, path)
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}
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return nil
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})
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return paths
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}
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func findPaths() []mediaPath {
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paths := make([]mediaPath, 0)
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wd, _ := os.Getwd()
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for _, path := range findAttributeFiles() {
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attributes, err := os.Open(path)
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if err != nil {
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return paths
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}
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scanner := bufio.NewScanner(attributes)
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for scanner.Scan() {
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line := scanner.Text()
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if line == "" {
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continue
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}
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if strings.Contains(line, "filter=lfs") {
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fields := strings.Fields(line)
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relPath, _ := filepath.Rel(wd, path)
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paths = append(paths, mediaPath{Path: fields[0], Source: relPath})
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}
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}
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}
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return paths
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}
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func needsTrailingLinebreak(filename string) bool {
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file, err := os.Open(filename)
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if err != nil {
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return false
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}
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defer file.Close()
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buf := make([]byte, 16384)
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bytesRead := 0
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for {
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n, err := file.Read(buf)
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if err == io.EOF {
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break
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} else if err != nil {
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return false
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}
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bytesRead = n
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}
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return !strings.HasSuffix(string(buf[0:bytesRead]), "\n")
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}
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func init() {
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RootCmd.AddCommand(trackCmd)
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}
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