add deployment code

deployment/matrix-disk-space-janitor.service

@@ -0,0 +1,26 @@
+# this file goes in /lib/systemd/system/matrix-diskspace-janitor.service
+# then run   systemctl daemon-reload 
+# and        systemctl enable --now matrix-diskspace-janitor.service
+
+# you can read the logs with  journalctl -u matrix-diskspace-janitor.service -n 100 --no-pager
+
+[Unit]
+Description=https://git.cyberia.club/cyberia/matrix-synapse-diskspace-janitor
+After=network.target
+
+[Service]
+Type=simple
+Restart=always
+
+# wait at least 5 seconds before restarting if it crashes
+RestartSec=5
+
+WorkingDirectory=/opt/matrix-diskspace-janitor
+
+ExecStart=/opt/matrix-diskspace-janitor/janitor
+
+User=caddy
+Group=caddy
+
+[Install]
+WantedBy=multi-user.target

frontend.go

@@ -60,7 +60,11 @@ type DeleteProgress struct {
 
 func initFrontend(config *Config, db *DBModel) FrontendApp {
 
-	cssBytes, err := os.ReadFile(filepath.Join(".", "frontend", "static", "app.css"))
+	currentDirectory, err := os.Getwd()
+	if err != nil {
+		panic(errors.Wrap(err, "can't initFrontend because can't get working directory:"))
+	}
+	cssBytes, err := os.ReadFile(filepath.Join(currentDirectory, "frontend", "static", "app.css"))
 	if err != nil {
 		panic(errors.Wrap(err, "can't initFrontend because can't read cssBytes:"))
 	}
@@ -247,7 +251,7 @@ func initFrontend(config *Config, db *DBModel) FrontendApp {
 
 	app.reloadTemplates()
 
-	staticFilesDir := "./frontend/static"
+	staticFilesDir := filepath.Join(currentDirectory, "frontend/static")
 	log.Printf("serving static files from %s", staticFilesDir)
 	app.Router.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir(staticFilesDir))))
 

main.go

@@ -54,8 +54,17 @@ func main() {
 
 	validateConfig(&config)
 
-	os.MkdirAll("data", 0644)
-	os.MkdirAll("data/sessions", 0644)
+	currentDirectory, err := os.Getwd()
+	if err != nil {
+		panic(err)
+	}
+	log.Printf(
+		"🧹 matrix-synapse-diskspace-janitor starting up with UID %d EUID %d GID %d EGID %d  workingDirectory '%s'\n",
+		os.Getuid(), os.Geteuid(), os.Getgid(), os.Getegid(), currentDirectory,
+	)
+
+	os.MkdirAll("data", 0755)
+	os.MkdirAll("data/sessions", 0755)
 
 	db := initDatabase(&config)
 	matrixAdmin = initMatrixAdmin(&config)
@@ -104,7 +113,7 @@ func runScheduledTask(db *DBModel, config *Config, measureMediaSize bool, stateG
 		log.Printf("ERROR!: runScheduledTask can't GetDBTableSizes: %s\n", err)
 	}
 	log.Println("Saving data/dbTableSizes.json...")
-	err = WriteJsonFile[[]DBTableSize]("data/dbTableSizes.json", tables)
+	err = WriteJsonFile("data/dbTableSizes.json", tables)
 	if err != nil {
 		log.Printf("ERROR!: runScheduledTask can't write data/dbTableSizes.json: %s\n", err)
 	}
@@ -139,9 +148,6 @@ func runScheduledTask(db *DBModel, config *Config, measureMediaSize bool, stateG
 		PostgresBytes: postgresBytes,
 	}
 
-	const 
-	const diskUsagePercent = 
-
 	log.Println("Saving data/diskUsage.json...")
 	err = WriteJsonFile("data/diskUsage.json", diskUsage)
 	if err != nil {
@@ -194,8 +200,6 @@ func runScheduledTask(db *DBModel, config *Config, measureMediaSize bool, stateG
 		log.Printf("ERROR!: runScheduledTask can't write data/janitorState.json: %s\n", err)
 	}
 
-
-	
 	log.Println("runScheduledTask completed!")
 	isRunningScheduledTask = false
 }

storage_service.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"os"
+	"path/filepath"
 
 	errors "git.sequentialread.com/forest/pkg-errors"
 )
@@ -10,6 +11,11 @@ import (
 func WriteJsonFile[T any](path string, object T) error {
 	mutex.Lock()
 	defer mutex.Unlock()
+	currentDirectory, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+	path = filepath.Join(currentDirectory, path)
 	file, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
 	if err != nil {
 		return err
@@ -23,6 +29,11 @@ func ReadJsonFile[T any](path string) (T, error) {
 	mutex.Lock()
 	defer mutex.Unlock()
 	var object T
+	currentDirectory, err := os.Getwd()
+	if err != nil {
+		return object, err
+	}
+	path = filepath.Join(currentDirectory, path)
 	file, err := os.OpenFile(path, os.O_RDONLY, 0644)
 	if err != nil && os.IsNotExist(err) {
 		return object, nil