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|
package main
import (
"fmt"
"io"
"os"
"path/filepath"
"time"
)
type FileMeta struct {
Size int64
Mode os.FileMode
ModTime time.Time
Symlink string
}
type Manifest struct {
Files map[string]FileMeta
}
type syncStats struct {
files int
dirs int
skipped int
errors int
}
func initialSync(hostDir, dataDir string, stack *GitignoreStack, dryRun bool) (*Manifest, error) {
manifest := &Manifest{Files: make(map[string]FileMeta)}
stats := &syncStats{}
start := time.Now()
logInfo("initial sync: scanning %s ...", hostDir)
err := filepath.Walk(hostDir, func(path string, info os.FileInfo, err error) error {
if err != nil {
stats.errors++
logErrorf("walk %s: %v", path, err)
return nil
}
relPath, err := filepath.Rel(hostDir, path)
if err != nil {
return err
}
if relPath == "." {
return nil
}
if isGitDir(relPath) {
if info.IsDir() {
return filepath.SkipDir
}
return nil
}
if info.IsDir() && hasGitignore(path) {
stack.Push(path)
}
if stack.IsIgnored(relPath) {
stats.skipped++
if info.IsDir() {
return filepath.SkipDir
}
return nil
}
if info.IsDir() {
stats.dirs++
} else {
stats.files++
}
if stats.files%1000 == 0 && stats.files > 0 {
fmt.Fprintf(os.Stderr, "\r synced %d files, %d dirs ...", stats.files, stats.dirs)
}
destPath := filepath.Join(dataDir, relPath)
linkTarget := ""
if info.Mode()&os.ModeSymlink != 0 {
linkTarget, err = os.Readlink(path)
if err != nil {
stats.errors++
logErrorf("readlink %s: %v", relPath, err)
return nil
}
}
meta := FileMeta{
Size: info.Size(),
Mode: info.Mode(),
ModTime: info.ModTime(),
Symlink: linkTarget,
}
manifest.Files[relPath] = meta
if dryRun {
return nil
}
if info.IsDir() {
if err := os.MkdirAll(destPath, info.Mode()); err != nil {
stats.errors++
logErrorf("mkdir %s: %v", relPath, err)
}
return nil
}
if err := os.MkdirAll(filepath.Dir(destPath), 0755); err != nil {
stats.errors++
logErrorf("mkdir %s: %v", filepath.Dir(relPath), err)
return nil
}
if linkTarget != "" {
if err := os.Symlink(linkTarget, destPath); err != nil {
stats.errors++
logErrorf("symlink %s: %v", relPath, err)
}
return nil
}
if err := copyFileWithRetry(path, destPath, info.Mode()); err != nil {
stats.errors++
logErrorf("copy %s: %v", relPath, err)
}
return nil
})
elapsed := time.Since(start)
fmt.Fprintf(os.Stderr, "\r")
logInfo("initial sync: done in %s — %d files, %d dirs, %d skipped, %d errors",
elapsed.Round(time.Millisecond), stats.files, stats.dirs, stats.skipped, stats.errors)
return manifest, err
}
func copyFile(src, dst string, mode os.FileMode) error {
srcFile, err := os.Open(src)
if err != nil {
return err
}
defer srcFile.Close()
dstFile, err := os.OpenFile(dst, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, mode)
if err != nil {
return err
}
defer dstFile.Close()
_, err = io.Copy(dstFile, srcFile)
return err
}
|
