From fba1efb77a9cbb620eab427c26a8983042f493ed Mon Sep 17 00:00:00 2001
From: Radtoo <56451+Radtoo@users.noreply.github.com>
Date: Sat, 8 Jan 2022 16:31:44 +0100
Subject: [PATCH] Now works with a single file too

Parsing removed from doFixOneVolume

Needle init removed from runFix
---
 weed/command/fix.go | 59 ++++++++++++++++++++++++---------------------
 1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/weed/command/fix.go b/weed/command/fix.go
index 7b99c1d77..bff9416a0 100644
--- a/weed/command/fix.go
+++ b/weed/command/fix.go
@@ -2,7 +2,7 @@ package command
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io/fs"
 	"os"
 	"path"
 	"strconv"
@@ -22,17 +22,16 @@ func init() {
 }
 
 var cmdFix = &Command{
-	UsageLine: "fix -dir=/tmp -volumeId=234",
-	Short:     "run weed tool fix on index file if corrupted",
-	Long: `Fix runs the SeaweedFS fix command to re-create the index .idx file.
-
+	UsageLine: "fix -path=/tmp [-volumeId=234] [-collection=bigData]",
+	Short:     "run weed tool fix to recreate index file(s) if corrupted",
+	Long: `Fix runs the SeaweedFS fix command on dat files to re-create the index .idx file.
   `,
 }
 
 var (
-	fixVolumePath       = cmdFix.Flag.String("dir", ".", "data directory to store files")
-	fixVolumeCollection = cmdFix.Flag.String("collection", "", "the volume collection name")
-	fixVolumeId         = cmdFix.Flag.Int("volumeId", 0, "an optional volume id.")
+	fixVolumePath       = cmdFix.Flag.String("path", ".", "path to an individual .dat file or a folder of dat files")
+	fixVolumeCollection = cmdFix.Flag.String("collection", "", "an optional volume collection name, if specified only it will be processed")
+	fixVolumeId         = cmdFix.Flag.Int64("volumeId", 0, "an optional volume id, if not 0 (default) only it will be processed")
 )
 
 type VolumeFileScanner4Fix struct {
@@ -62,17 +61,23 @@ func (scanner *VolumeFileScanner4Fix) VisitNeedle(n *needle.Needle, offset int64
 }
 
 func runFix(cmd *Command, args []string) bool {
+	basePath, f := path.Split(util.ResolvePath(*fixVolumePath))
 
-	dir := util.ResolvePath(*fixVolumePath)
-	if *fixVolumeId != 0 {
-		doFixOneVolume(dir, *fixVolumeCollection, needle.VolumeId(*fixVolumeId))
-		return true
-	}
-
-	files, err := ioutil.ReadDir(dir)
-	if err != nil {
-		fmt.Println(err)
-		return false
+	files := []fs.DirEntry{}
+	if f == "" {
+		fileInfo, err := os.ReadDir(basePath + f)
+		if err != nil {
+			fmt.Println(err)
+			return false
+		}
+		files = fileInfo
+	} else {
+		fileInfo, err := os.Stat(basePath + f)
+		if err != nil {
+			fmt.Println(err)
+			return false
+		}
+		files = []fs.DirEntry{fs.FileInfoToDirEntry(fileInfo)}
 	}
 
 	for _, file := range files {
@@ -95,30 +100,28 @@ func runFix(cmd *Command, args []string) bool {
 			fmt.Printf("Failed to parse volume id from %s: %v\n", baseFileName, parseErr)
 			return false
 		}
-		doFixOneVolume(dir, collection, needle.VolumeId(volumeId))
+		if *fixVolumeId != 0 && *fixVolumeId != volumeId {
+			continue
+		}
+		doFixOneVolume(basePath, baseFileName, collection, volumeId)
 	}
 
 	return true
 }
 
-func doFixOneVolume(dir, collection string, volumeId needle.VolumeId) {
+func doFixOneVolume(basepath string, baseFileName string, collection string, volumeId int64) {
 
-	baseFileName := strconv.Itoa(int(volumeId))
-	if collection != "" {
-		baseFileName = collection + "_" + baseFileName
-	}
-
-	indexFileName := path.Join(dir, baseFileName+".idx")
+	indexFileName := path.Join(basepath, baseFileName+".idx")
 
 	nm := needle_map.NewMemDb()
 	defer nm.Close()
 
-	vid := needle.VolumeId(*fixVolumeId)
+	vid := needle.VolumeId(volumeId)
 	scanner := &VolumeFileScanner4Fix{
 		nm: nm,
 	}
 
-	if err := storage.ScanVolumeFile(dir, collection, vid, storage.NeedleMapInMemory, scanner); err != nil {
+	if err := storage.ScanVolumeFile(basepath, collection, vid, storage.NeedleMapInMemory, scanner); err != nil {
 		glog.Fatalf("scan .dat File: %v", err)
 		os.Remove(indexFileName)
 	}