Update nix flake, bugfix

.github/workflows/go.yml

@@ -0,0 +1,28 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.22'
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...

README.md

@@ -1,94 +1,130 @@
-# Simple photo cataloguer
+# Effortless Photo Organizer
 
-Just copy/hardlink photos (or video, or any other files) from one place to
-another, separating them in sub-directories like `$ROOT/year/month/day/`.
+[![Go](https://github.com/derfenix/photocatalog/actions/workflows/go.yml/badge.svg)](https://github.com/derfenix/photocatalog/actions/workflows/go.yml)
 
-### TL;DR 
+A simple tool to organize your photos, videos, or other files by copying or hardlinking them into a date-based directory structure like `$ROOT/year/month/day/`.
 
-I have a smartphone, I have a Syncthing ~~uugh... SmartThing~~ and all photos
-from smartphone nicely synced to my PC without my attention. But I can't just
-keep all photos in synced folder: if I'll clean my phone memory - all photos 
-from pc will be cleaned too. I need to not forget copy files in another 
-place before cleaning phone's memory. Also, I can't  just drop all photos in 
-one dir - I will not find anything there later, and a folder with thousands 
-photos looks like a bad idea from either side.    
-So I create this tool in one evening. All it does - copy (or create hardlinks for)
-files from one place to another, creating basic date-aware directories
-structure for that files.
+## TL;DR
 
+I use a smartphone and Syncthing to automatically sync my photos to my PC. However, if I clean up my phone's memory, the synced photos on my PC are deleted as well.
+Dumping everything into one folder wasn't an option — finding anything later would be a nightmare. 
+
+To avoid this, I needed a solution to back up and organize my photos without manual effort. So, I built this tool in one evening to solve the problem. It has worked flawlessly for me and might help you too. If you encounter any issues, feel free to open a ticket — I'll do my best to assist.
+
+## Installation
+
+Install the tool via `go`:
 
-## Installing
 ```bash
-go install github.com/derfenix/photocatalog@latest
+go install github.com/derfenix/photocatalog/v2@latest
 ```
-Optionally you could copy created binary from the GO's bin path to 
-system or user $PATH, e.g. /usr/local/bin/.
+
+Optionally, copy the binary to a directory in your system or user's `$PATH` (e.g., `/usr/local/bin`):
+
 ```bash
 sudo cp ${GOPATH}/bin/photocatalog /usr/local/bin/photocatalog
 ```
 
-## Supported formats
-At this moment supported jpeg files with filled exif data or any other 
-files but with names matching pattern `yyymmdd_HHMMSS.ext`. Such 
-names format applied by android's camera software (I guess all cams 
-use this format, fix me if I'm wrong).
+## Organization Modes
 
-There is no support for changing names format without modifying  source code 
-at this time.
+The tool supports the following organization modes:
+
+- **copy** — Copies files to the target directory. If the filesystem supports it, uses Copy-on-Write (COW) for efficiency (via FICLONE ioctl call).
+- **hardlink** — Creates hardlinks to the source files, saving disk space. Ideal (and usable only) if the source and target are on the same partition, 
+though file permissions remain linked to the original. Fallback to copy on fail.
+- **move** — Moves files from the source to the target directory.
+- **symlink** — Creates symbolic links at the target pointing to the source files.
+
+## Supported Formats
+
+- **JPEG and TIFF files** with valid EXIF metadata.
+- Files named in the format `yyyymmdd_HHMMSS.ext` (optionally with suffixes after the timestamp) (e.g., `20230101_123456.jpg`). This format is common in Android cameras and other devices.
+
+If a file lacks EXIF data, the tool falls back to parsing the filename.
+
+Currently, the timestamp format is not customizable. Let me know if support for additional formats is required.
 
 ## Usage
-### One-shot 
-#### Copy files (make a COW if fs supports it)
-```bash
-photocalog -mode copy -target ./photos/ ./sync/photos/*
+
+Arguments
+```
+  -dir-mode string
+        Mode bits for directories can be created while syncing (default "0777")
+  -file-mode string
+        Mode bits for files created while syncing (not applicable for hardlink mode) (default "0644")
+  -mode string
+        Organazing mode (default "hardlink")
+  -overwrite
+        Overwrite existing files
+  -skip-full-sync
+        Skip full sync at startup
+  -source string
+        Source directory
+  -target string
+        Target directory
+  -watch
+        Watch for changes in the source directory (default true)
+
 ```
 
-#### Create hardlinks (only withing one disk partition)
-```bash
-photocalog -mode hardlink -target ./photos/ ./sync/photos/*
-```
-or 
-```bash
-photocalog -target ./photos/ ./sync/photos/*
+`-skip-full-sync` and `-watch` are not compatible.
+
+`-source` and `-target` are required.
+
+
+## Examples
+
+### One-Time Run
+
+#### Copy Files
+```shell
+photocatalog -mode copy -target ./photos/ -source ./sync/photos/
 ```
 
-### Monitor
-#### Copy files (make a COW if fs supports it)
-```bash
-photocalog -mode copy -target ./photos -monitor ./sync/photos/*
+#### Create Hardlinks
+```shell
+photocatalog -mode hardlink -target ./photos/ -source ./sync/photos/
 ```
 
-#### Create hardlinks (only withing one disk partition)
-```bash
-photocalog -mode hardlink -target ./photos/ -monitor ./sync/photos/
-```
-or 
-```bash
-photocalog -target ./photos/ -monitor ./sync/photos/
+### Watch Mode
+
+Enable continuous monitoring of a source directory:
+
+#### Copy Files
+```shell
+photocatalog -mode copy -target ./photos -watch -source ./sync/photos/
 ```
 
-## Install and run monitor service
+#### Create Hardlinks
+```shell
+photocatalog -mode hardlink -target ./photos/ -watch -source ./sync/photos/
+```
 
-### Systemd
-```bash
+## Running as a Service
+
+### Systemd Setup
+
+Install and configure the service:
+```shell
 sh ./init/install_service.sh systemd
 ```
-This command will install unit file, create stub for its config and open
-editor to allow you edit configuration. Config file stored at 
-`$HOME/.config/photocatalog`.
 
-Then enable and start service
-```bash
+This will:
+
+1. Install a systemd unit file.
+2. Create a configuration stub at `$HOME/.config/photocatalog`.
+3. Open the config file for editing.
+
+Enable and start the service:
+```shell
 systemctl --user enable --now photocatalog
 ```
-That's all. Now, if any file will be placed in directory, specified as `MONITOR`
-in config file, this file will be copied or hardlinked into the target dir
-under corresponding sub-dir. 
+
+Now, files added to the monitored directory (`MONITOR` in the config) will automatically be organized into the target directory under the corresponding subdirectories.
 
 ## FAQ
 
-### Why this tool was created if there is awesome XXX tool?
-I had two good reasons:
-1. I wanted
-2. I can
-
+### Why did you create this tool when awesome tool XXX already exists?
+Two reasons:
+1. I wanted to.
+2. I could.

application/application.go

@@ -43,22 +43,24 @@ func (a *Application) Start(ctx context.Context, wg *sync.WaitGroup) error {
 		WithDirMode(os.FileMode(a.config.DirMode)).
 		WithFileMode(os.FileMode(a.config.FileMode)).
 		WithErrLogger(func(err error) {
-			log.Println(err)
+			log.Println("ERROR:", err.Error())
 		})
 
 	if a.config.Overwrite {
 		org = org.WithOverwrite()
 	}
 
-	if err := org.FullSync(ctx); err != nil {
-		return fmt.Errorf("full sync: %w", err)
-	}
-
 	if a.config.Watch {
 		if err := org.Watch(ctx, wg); err != nil {
 			return fmt.Errorf("initialize watch: %w", err)
 		}
 	}
 
+	if !a.config.SkipFullSync {
+		if err := org.FullSync(ctx); err != nil {
+			return fmt.Errorf("full sync: %w", err)
+		}
+	}
+
 	return nil
 }

application/config.go

@@ -14,6 +14,8 @@ const (
 	ModeMove     Mode = "move"
 )
 
+var SupportedModes = []Mode{ModeHardlink, ModeSymlink, ModeMove, ModeCopy}
+
 type Config struct {
 	SourceDir    string
 	TargetDir    string
@@ -22,6 +24,7 @@ type Config struct {
 	DirMode      uint64
 	FileMode     uint64
 	Watch        bool
+	SkipFullSync bool
 }
 
 func (c *Config) Validate() error {
@@ -33,8 +36,12 @@ func (c *Config) Validate() error {
 		return fmt.Errorf("target dir is required")
 	}
 
-	if !slices.Contains([]Mode{ModeHardlink, ModeSymlink, ModeMove, ModeSymlink}, c.Mode) {
-		return fmt.Errorf("invalid mode %s", c.Mode)
+	if !slices.Contains(SupportedModes, c.Mode) {
+		return fmt.Errorf("invalid mode %s, supported modes: %s", c.Mode, SupportedModes)
+	}
+
+	if c.SkipFullSync && !c.Watch {
+		return fmt.Errorf("skip full sync and watch disabled — nothing to do")
 	}
 
 	return nil

flake.lock

@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1736061677,
+        "narHash": "sha256-DjkQPnkAfd7eB522PwnkGhOMuT9QVCZspDpJJYyOj60=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "cbd8ec4de4469333c82ff40d057350c30e9f7d36",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-24.11",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,128 @@
+{
+  description = "Photo/video organization tool";
+
+  inputs.nixpkgs.url = "nixpkgs/nixos-24.11";
+
+  outputs = { self, nixpkgs }:
+    let
+      lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";
+      version = "2.0.2";
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+    in
+    {
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          photocatalog = pkgs.buildGoModule {
+            pname = "photocatalog";
+            inherit version;
+            src = ./.;
+            vendorHash = "sha256-dj11SRRoB8ZbkcQs75HPI0DpW4c5jzY0N8MD1wKpw+4=";
+          };
+        }
+      );
+
+      nixosModules.photocatalog = { config, lib, pkgs, ... }:
+        with lib;
+      {
+        options.photocatalog = {
+          enable = lib.mkEnableOption "Enable photocatalog";
+
+          syncs = mkOption {
+            default = {};
+            description = ''
+              Organization paths with its own params.
+            '';
+            example = {
+
+            };
+            type = types.attrsOf (types.submodule ({ name, ... }: {
+              options = {
+                source = mkOption {
+                  type = types.str;
+                  default = name;
+                  description = ''
+                    Source folder path.
+                  '';
+                };
+                target = mkOption {
+                  type = types.str;
+                  description = ''
+                    Target folder path.
+                  '';
+                };
+                overwrite = mkOption {
+                  type = types.bool;
+                  default = false;
+                  description = ''
+                    Overwrite files, existing in target.
+                  '';
+                };
+                watch = mkOption {
+                  type = types.bool;
+                  default = true;
+                  description = ''
+                    Watch for new files in source path.
+                  '';
+                };
+                skipFullSync = mkOption {
+                  type = types.bool;
+                  default = false;
+                  description = ''
+                    Do not make full sync.
+                  '';
+                };
+                mode = mkOption {
+                  type = types.str;
+                  default = "hardlink";
+                  description = ''
+                    Organization mode, one of [ hardlink symlink move copy ].
+                  '';
+                };
+              };
+            }));
+          };
+        };
+
+        config = lib.mkIf config.photocatalog.enable {
+          environment.systemPackages = [ self.packages.${pkgs.system}.photocatalog ];
+          systemd.user.services = lib.mapAttrs' (name: sync: nameValuePair
+            ("photocatalog${lib.replaceStrings ["/"] ["-"] sync.source}")
+            {
+                after = [ "local-fs.target" ];
+                path = [
+                  self.packages.${pkgs.system}.photocatalog
+                ];
+                wantedBy = [
+                  "default.target"
+                ];
+                preStart = if !sync.skipFullSync then ''
+                  mkdir -p ${sync.target}
+                  photocatalog -source ${sync.source} -target ${sync.target} -mode ${sync.mode}
+                '' else null;
+                script = "photocatalog -source ${sync.source} -target ${sync.target} -skip-full-sync -watch -mode ${sync.mode}";
+                serviceConfig = {
+                  Type="simple";
+                  Restart="no";
+                };
+            }
+          ) config.photocatalog.syncs;
+        };
+      };
+
+      devShells = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            buildInputs = with pkgs; [ go gopls gotools go-tools ];
+          };
+        });
+      defaultPackage = forAllSystems (system: self.packages.${system}.photocatalog);
+    };
+}

init/systemd/photocatalog.service

@@ -7,5 +7,5 @@ WantedBy=default.target
 [Service]
 Type=simple
 EnvironmentFile=/home/%u/.config/photocatalog
-ExecStart=photocatalog -mode $MODE -target $TARGET -monitor $MONITOR -update_mtime $UPDATECTIME
-ExecStartPre=photocatalog -mode $MODE -target $TARGET ${MONITOR}
+ExecStart=photocatalog -mode $MODE -target $TARGET -watch -source $MONITOR -skip-full-sync
+ExecStartPre=photocatalog -mode $MODE -target $TARGET -source ${MONITOR}

internal/organizer/modes/copy.go

@@ -5,12 +5,18 @@ import (
 	"io"
 	"log"
 	"os"
+	"runtime"
+	"sync/atomic"
+
+	"golang.org/x/sys/unix"
 )
 
+var cowDisabled = atomic.Bool{}
+
 type Copy struct{}
 
 func (c Copy) PlaceIt(sourcePath, targetPath string, mode os.FileMode) error {
-	targetFile, err := os.OpenFile(targetPath, os.O_TRUNC|os.O_RDWR|os.O_CREATE, mode)
+	targetFile, err := os.OpenFile(targetPath, os.O_TRUNC|os.O_WRONLY|os.O_CREATE, mode)
 	if err != nil {
 		return fmt.Errorf("open target file: %w", err)
 	}
@@ -28,6 +34,17 @@ func (c Copy) PlaceIt(sourcePath, targetPath string, mode os.FileMode) error {
 		_ = sourceFile.Close()
 	}()
 
+	// Try to do a COW.
+	if runtime.GOOS == "linux" && !cowDisabled.Load() {
+		if err := unix.IoctlFileClone(int(targetFile.Fd()), int(sourceFile.Fd())); err == nil {
+			return nil
+		} else {
+			log.Println(fmt.Errorf("COW attempt for %s failed: %w", targetPath, err))
+			log.Println("Disabling COW until restart")
+			cowDisabled.Store(true)
+		}
+	}
+
 	copySize, err := io.Copy(targetFile, sourceFile)
 	if err != nil {
 		return fmt.Errorf("copy source file: %w", err)

internal/organizer/modes/hardlink.go

@@ -1,21 +1,38 @@
 package modes
 
 import (
-	"fmt"
+	"log"
 	"os"
+	"sync/atomic"
 )
 
+var hardLinkNotSupported = atomic.Bool{}
+
 type HardLink struct {
 }
 
 func (h HardLink) PlaceIt(sourcePath, targetPath string, mode os.FileMode) error {
+	if hardLinkNotSupported.Load() {
+		return h.fallBack(sourcePath, targetPath, mode)
+	}
+
 	if err := os.Link(sourcePath, targetPath); err != nil {
 		if os.IsExist(err) {
 			return nil
 		}
 
-		return fmt.Errorf("create hard link: %w", err)
+		log.Println("Create hardlink failed:", err.Error())
+		hardLinkNotSupported.Store(true)
+
+		return h.fallBack(sourcePath, targetPath, mode)
 	}
 
 	return nil
 }
+
+func (h HardLink) fallBack(sourcePath string, targetPath string, mode os.FileMode) error {
+	if copyErr := (Copy{}).PlaceIt(sourcePath, targetPath, mode); copyErr != nil {
+		return copyErr
+	}
+	return nil
+}

internal/organizer/organizer.go

@@ -11,12 +11,18 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"syscall"
 
 	"github.com/fsnotify/fsnotify"
 
 	"github.com/derfenix/photocatalog/v2/internal/metadata"
 )
 
+const (
+	defaultDirMode  = 0o774
+	defaultFileMode = 0o644
+)
+
 type MetaExtractor interface {
 	Extract(_ string, data io.Reader) (metadata.Metadata, error)
 }
@@ -31,8 +37,8 @@ func NewOrganizer(mode Mode, source, target string) *Organizer {
 		sourceDir: source,
 		targetDir: target,
 
-		dirMode:  0777,
-		fileMode: 0644,
+		dirMode:  defaultDirMode,
+		fileMode: defaultFileMode,
 
 		metaExtractors: map[string]MetaExtractor{
 			"":     &metadata.Default{},
@@ -125,6 +131,8 @@ func (o *Organizer) Watch(ctx context.Context, wg *sync.WaitGroup) error {
 		if err := watcher.Close(); err != nil {
 			o.logErr(fmt.Errorf("close watcher: %w", err))
 		}
+
+		syscall.Sync()
 	}()
 
 	go func() {
@@ -144,15 +152,17 @@ func (o *Organizer) Watch(ctx context.Context, wg *sync.WaitGroup) error {
 					// Add new directories to the watcher.
 					if stat.IsDir() {
 						if err := watcher.Add(event.Name); err != nil {
-							o.logErr(fmt.Errorf("watch dir: %w", err))
+							o.logErr(fmt.Errorf("add the directory %s to watcher: %w", event.Name, err))
 						}
 
 						continue
 					}
 
+					go func() {
 						if err := o.processFile(event.Name); err != nil {
 							o.logErr(fmt.Errorf("process file %s: %w", event.Name, err))
 						}
+					}()
 				}
 
 			case <-ctx.Done():
@@ -175,7 +185,9 @@ func (o *Organizer) FullSync(ctx context.Context) error {
 		}
 
 		if err := o.processFile(path); err != nil {
-			return err
+			log.Printf("Process file `%s` failed: %s", path, err.Error())
+
+			return nil
 		}
 
 		return nil
@@ -198,7 +210,7 @@ func (o *Organizer) getMetaForPath(fp string) (metadata.Metadata, error) {
 
 	meta, err := o.getMetadata(fp, file)
 	if err != nil {
-		return metadata.Metadata{}, fmt.Errorf("get metadata: %w", err)
+		return metadata.Metadata{}, fmt.Errorf("get metadatas: %w", err)
 	}
 
 	return meta, nil
@@ -231,6 +243,8 @@ func (o *Organizer) getMetadata(fp string, data io.Reader) (metadata.Metadata, e
 }
 
 func (o *Organizer) processFile(sourcePath string) error {
+	fmt.Printf("%s %d %o\n", o.fileMode, o.fileMode, o.fileMode)
+
 	meta, err := o.getMetaForPath(sourcePath)
 	if err != nil {
 		return err
@@ -241,7 +255,7 @@ func (o *Organizer) processFile(sourcePath string) error {
 		return fmt.Errorf("build target path: %w", err)
 	}
 
-	if pathExists(targetPath) && !o.overwrite {
+	if o.pathExists(targetPath) && !o.overwrite {
 		return nil
 	}
 
@@ -268,6 +282,7 @@ func (o *Organizer) BuildTargetPath(sourcePath string, meta metadata.Metadata) (
 		o.targetDir,
 		strconv.Itoa(meta.Created.Year()),
 		strconv.Itoa(int(meta.Created.Month())),
+		strconv.Itoa(meta.Created.Day()),
 		sourcePath,
 	)
 
@@ -275,7 +290,7 @@ func (o *Organizer) BuildTargetPath(sourcePath string, meta metadata.Metadata) (
 }
 
 func (o *Organizer) ensureTargetPath(targetPath string) error {
-	if pathExists(targetPath) {
+	if o.pathExists(targetPath) {
 		return nil
 	}
 
@@ -289,21 +304,27 @@ func (o *Organizer) ensureTargetPath(targetPath string) error {
 	for _, part := range strings.Split(relPath, string(filepath.Separator)) {
 		dir = filepath.Join(dir, part)
 
-		if err := os.Mkdir(dir, o.dirMode); err != nil && !os.IsExist(err) {
+		if err := os.Mkdir(dir, os.ModePerm); err != nil && !os.IsExist(err) {
 			return fmt.Errorf("create target directory path at %s: %w", dir, err)
 		}
+
+		if err := os.Chmod(dir, os.ModePerm&o.dirMode); err != nil {
+			return fmt.Errorf("chmod directory %s: %w", dir, err)
+		}
 	}
 
 	return nil
 }
 
-func pathExists(path string) bool {
+func (o *Organizer) pathExists(path string) bool {
 	_, err := os.Stat(path)
 	if err != nil {
 		if os.IsNotExist(err) {
 			return false
 		}
 
+		o.logErr(fmt.Errorf("pathExists stat %s: %w", path, err))
+
 		return true
 	}
 

main.go

@@ -3,8 +3,10 @@ package main
 import (
 	"context"
 	"flag"
+	"fmt"
 	"log"
 	"os/signal"
+	"slices"
 	"strconv"
 	"sync"
 	"syscall"
@@ -34,42 +36,60 @@ func main() {
 
 func loadCfg() application.Config {
 	cfg := application.Config{
-		SourceDir: "",
-		TargetDir: "",
-		Mode:      "",
-		Overwrite: false,
-		DirMode:   0,
-		FileMode:  0,
-		Watch:     false,
+		DirMode:  0774,
+		FileMode: 0644,
 	}
 
 	flag.StringVar(&cfg.SourceDir, "source", "", "Source directory")
 	flag.StringVar(&cfg.TargetDir, "target", "", "Target directory")
 	flag.BoolVar(&cfg.Overwrite, "overwrite", false, "Overwrite existing files")
 	flag.BoolVar(&cfg.Watch, "watch", false, "Watch for changes in the source directory")
+	flag.BoolVar(&cfg.Watch, "monitor", false, "Watch for changes in the source directory") // Legacy option
+	flag.BoolVar(&cfg.SkipFullSync, "skip-full-sync", false, "Skip full sync at startup")
 
-	var dirMode string
-	var fileMode string
-	flag.StringVar(&dirMode, "dirmode", "0777", "Mode bits for directories can be created while syncing")
-	flag.StringVar(&fileMode, "filemode", "0644", "Mode bits for files created while syncing (not applicable for hardlink mode)")
+	flag.Func("dir-mode", "Mode bits for directories can be created while syncing", func(s string) error {
+		var err error
 
-	var mode string
-	flag.StringVar(&mode, "mode", "hardlink", "Mode")
+		cfg.DirMode, err = strconv.ParseUint(s, 8, 32)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	flag.Func("file-mode", "Mode bits for files created while syncing (not applicable for hardlink mode)", func(s string) error {
+		var err error
+
+		cfg.FileMode, err = strconv.ParseUint(s, 8, 32)
+		if err != nil {
+			return err
+		}
+
+		return nil
+	})
+
+	flag.Func("mode", "Organizing mode", func(s string) error {
+		if s == "" {
+			cfg.Mode = application.ModeHardlink
+		}
+
+		cfg.Mode = application.Mode(s)
+
+		if !slices.Contains(application.SupportedModes, cfg.Mode) {
+			return fmt.Errorf("invalid mode, supported modes: %s", application.SupportedModes)
+		}
+
+		return nil
+	})
 
 	flag.Parse()
 
-	cfg.Mode = application.Mode(mode)
+	// Legacy fallback
+	if cfg.SourceDir == "" {
+		log.Println("Source directory not specified. May be using old systemd unit file.")
 
-	var err error
-
-	cfg.DirMode, err = strconv.ParseUint(dirMode, 8, 32)
-	if err != nil {
-		cfg.DirMode = 0o777
-	}
-
-	cfg.FileMode, err = strconv.ParseUint(fileMode, 8, 32)
-	if err != nil {
-		cfg.DirMode = 0o644
+		cfg.SourceDir = flag.Arg(0)
 	}
 
 	return cfg