Automatically dump database after each write

database.go

@@ -1,9 +1,14 @@
 package main
 
 import (
+	"bufio"
 	"database/sql"
-	_ "github.com/mattn/go-sqlite3"
+	"log"
+	"os"
 	"sync"
+
+	_ "github.com/mattn/go-sqlite3"
+	"github.com/schollz/sqlite3dump"
 )
 
 var appDb *sql.DB
@@ -23,6 +28,7 @@ func startWritingToDb() {
 
 func finishWritingToDb() {
 	appDbWriteMutex.Unlock()
+	dumpDb()
 }
 
 func closeDb() error {
@@ -35,3 +41,25 @@ func vacuumDb() {
 	defer finishWritingToDb()
 	_, _ = appDb.Exec("VACUUM;")
 }
+
+func dumpDb() {
+	appDbWriteMutex.Lock()
+	defer appDbWriteMutex.Unlock()
+	f, err := os.OpenFile(appConfig.Db.File+".dump", os.O_RDWR|os.O_CREATE, 0644)
+	defer f.Close()
+	if err != nil {
+		log.Println("Failed to open dump file:", err.Error())
+		return
+	}
+	w := bufio.NewWriter(f)
+	err = sqlite3dump.DumpDB(appDb, w)
+	if err != nil {
+		log.Println("Failed to dump database:", err.Error())
+		return
+	}
+	err = w.Flush()
+	if err != nil {
+		log.Println("Failed to write dump:", err.Error())
+		return
+	}
+}

go.mod

@@ -24,6 +24,7 @@ require (
 	github.com/mitchellh/mapstructure v1.3.3 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
 	github.com/pelletier/go-toml v1.8.1 // indirect
+	github.com/schollz/sqlite3dump v1.2.4
 	github.com/smartystreets/assertions v1.2.0 // indirect
 	github.com/snabb/sitemap v1.0.0
 	github.com/spf13/afero v1.4.1 // indirect

go.sum

@@ -179,6 +179,7 @@ github.com/matryer/try v0.0.0-20161228173917-9ac251b645a2/go.mod h1:0KeJpeMD6o+O
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
 github.com/mattn/go-runewidth v0.0.9/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
+github.com/mattn/go-sqlite3 v1.9.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
 github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
 github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
@@ -229,6 +230,8 @@ github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40T
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
+github.com/schollz/sqlite3dump v1.2.4 h1:b3dgcKLsHZhF6OsB2EK+e/oA77vh4P/45TAh2R35OFI=
+github.com/schollz/sqlite3dump v1.2.4/go.mod h1:SEajZA5udi52Taht5xQYlFfHwr7AIrqPrLDrAoFv17o=
 github.com/scylladb/termtables v0.0.0-20191203121021-c4c0b6d42ff4/go.mod h1:C1a7PQSMz9NShzorzCiG2fk9+xuCgLkPeCvMHYR2OWg=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=