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main.go
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main.go
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package main
import (
"fmt"
"io/fs"
"log"
"os"
"path/filepath"
"regexp"
"strings"
)
const testMode = false
func mergeDir(dst, src string) error {
fmt.Println("merging", src, "into", dst)
entries, err := os.ReadDir(src)
if err != nil {
return err
}
for _, e := range entries {
fmt.Println(" moving from", src+"/"+e.Name(), "to", dst+"/"+e.Name())
dstExists := false
if _, err := os.Stat(dst + "/" + e.Name()); !os.IsNotExist(err) {
dstExists = true
}
if dstExists && e.IsDir() {
fmt.Println(" ", dst+"/"+e.Name(), "is a directory and exists, merging")
err = mergeDir(dst+"/"+e.Name(), src+"/"+e.Name())
if err != nil {
return err
}
} else {
if !testMode {
err = os.Rename(src+"/"+e.Name(), dst+"/"+e.Name())
if err != nil {
return err
}
}
}
}
if testMode {
return nil
}
return os.Remove(src)
}
func processDir(path string) (merged bool, err error) {
dirs := []string{}
files := []string{}
entries, err := os.ReadDir(path)
if err != nil {
return false, err
}
fmt.Println("processing subdirs in", path)
for _, e := range entries {
if e.IsDir() {
dirs = append(dirs, e.Name())
} else {
files = append(files, e.Name())
}
}
for _, dir1 := range dirs {
dir1matcher := regexp.QuoteMeta(dir1)
dir1matcher = strings.ReplaceAll(dir1matcher, "_", ".")
dir1matcher = "^" + dir1matcher + "$"
for _, dir2 := range dirs {
if dir1 == dir2 {
continue
}
match, _ := regexp.MatchString(dir1matcher, dir2)
if match {
err = mergeDir(filepath.Join(path, dir2), filepath.Join(path, dir1))
return true, err
}
}
}
fmt.Println("processing files in", path)
for _, file1 := range files {
file1matcher := regexp.QuoteMeta(file1)
file1matcher = strings.ReplaceAll(file1matcher, "_", ".")
file1matcher = "^" + file1matcher + "$"
for _, file2 := range files {
if file1 == file2 {
continue
}
match, _ := regexp.MatchString(file1matcher, file2)
if match {
file1Path := filepath.Join(path, file1)
fmt.Println(" removing", file1Path)
if !testMode {
err = os.Remove(file1Path)
if err != nil {
return false, err
}
}
}
}
}
return false, err
}
func main() {
// Check if argument is provided
if len(os.Args) < 2 {
log.Fatal("please provide a path")
}
root := os.Args[1]
// Check if root is a valid directory.
if _, err := os.Stat(root); os.IsNotExist(err) {
log.Fatal("please provide a valid path")
}
mergedError := fmt.Errorf("merged")
for walkErr := mergedError; walkErr == mergedError; {
walkErr = filepath.WalkDir(root, func(path string, dirEntry fs.DirEntry, err error) error {
if err != nil {
fmt.Println(err)
return err
}
if dirEntry.IsDir() {
merged, err := processDir(path)
if err != nil {
return err
}
if merged { // Restart the walk.
return mergedError
}
}
return err
})
if walkErr != nil && walkErr != mergedError {
log.Fatal(walkErr)
}
}
fmt.Println("done")
}