stashing certlib work

cmd/cleankbf/main.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"path/filepath"
+	"regexp"
+
+	"git.wntrmute.dev/kyle/goutils/die"
+)
+
+var reUUID = regexp.MustCompile(`^\w{8}-\w{4}-\w{4}-\w{4}-\w{12}_(.+)$`)
+
+func renamePath(path string, dryRun bool) error {
+	dir, base := filepath.Split(path)
+
+	base = reUUID.ReplaceAllString(base, "$1")
+	newPath := filepath.Join(dir, base)
+
+	if dryRun {
+		fmt.Println(path, "->", newPath)
+		return nil
+	}
+
+	err := os.Rename(path, newPath)
+	if err != nil {
+		return fmt.Errorf("renaming %s to %s failed: %v", path, newPath, err)
+	}
+
+	return nil
+}
+
+func test() bool {
+	const testFilePath = "48793683-8568-47c2-9e2d-eecab3c4b639_Whispers of Chernobog.pdf"
+	const expected = "Whispers of Chernobog.pdf"
+
+	actual := reUUID.ReplaceAllString(testFilePath, "$1")
+	return actual == expected
+}
+
+func main() {
+	var err error
+
+	if !test() {
+		die.With("test failed")
+	}
+
+	dryRun := false
+	flag.BoolVar(&dryRun, "n", dryRun, "don't rename files, just print what would be done")
+	flag.Parse()
+
+	paths := flag.Args()
+	if len(paths) == 0 {
+		paths, err = filepath.Glob("*")
+		die.If(err)
+	}
+
+	for _, file := range paths {
+		err = renamePath(file, dryRun)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "%s: %v\n", file, err)
+		}
+	}
+}