Initial commit

.gitignore

@@ -0,0 +1 @@
+hex-decode-fix

go.mod

@@ -0,0 +1,5 @@
+module git.cotugno.family/kevin/hex-decode-fix
+
+go 1.14
+
+require rsc.io/sqlite v1.0.0

go.sum

@@ -0,0 +1,2 @@
+rsc.io/sqlite v1.0.0 h1:zUGL/JDeFfblrma2rToXG+fUsGZe+CShUHI3KlUNwQc=
+rsc.io/sqlite v1.0.0/go.mod h1:bRoHdqsJCgrcQDvBeCS454l4kLoFAQKHdwfwpoweIOo=

main.go

@@ -0,0 +1,99 @@
+package main
+
+import (
+	"database/sql"
+	"encoding/hex"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	_ "rsc.io/sqlite"
+)
+
+const prefix = "\\x"
+
+var file string
+var table string
+var idColumn string
+var hexColumn string
+
+func init() {
+	if len(os.Args) < 5 {
+		log.Fatal("Requires args: file, table, id column, and hex column")
+	}
+	file = os.Args[1]
+	table = os.Args[2]
+	idColumn = os.Args[3]
+	hexColumn = os.Args[4]
+}
+
+func main() {
+	db, err := sql.Open("sqlite3", file)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = db.Ping()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	tx, err := db.Begin()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	rows, err := tx.Query(fmt.Sprintf("SELECT %s, %s FROM %s", idColumn, hexColumn, table))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+
+	var updated int
+	var skipped int
+	var failed int
+	for rows.Next() {
+		var id int
+		var raw string
+		if err = rows.Scan(&id, &raw); err != nil {
+			log.Print(err)
+			failed++
+			continue
+		}
+
+		if !strings.HasPrefix(raw, prefix) {
+			skipped++
+			continue
+		}
+
+		decoded, err := hex.DecodeString(strings.TrimPrefix(raw, prefix))
+		if err != nil {
+			log.Print(err)
+			failed++
+			continue
+		}
+
+		_, err = tx.Exec(fmt.Sprintf("UPDATE %s SET %s = $1 WHERE %s = $2", table, hexColumn, idColumn), decoded, id)
+		if err == nil {
+			updated++
+		} else {
+			log.Print(err)
+			failed++
+		}
+	}
+
+	log.Print("Skipped: ", skipped)
+	log.Print("Failed: ", failed)
+	log.Print("Updated: ", updated)
+
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	err = tx.Commit()
+	if err != nil {
+		log.Fatal(err)
+	}
+}