fix invalid mod load (#14)

Co-authored-by: Thomas von Dein <tom@vondein.org>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,31 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: "[bug-report]"
-labels: bug
-assignees: TLINDEN
-
----
-
-**Description**
-<!-- Please provide a clear and concise description of the issue: -->
-
-
-**Steps To Reproduce**
-<!-- Please detail the steps to reproduce the behavior, execute kleingebaeck with the -d option: -->
-
-
-**Expected behavior**
-<!-- What do you expected to happen instead? -->
-
-
-**Version information**
-<!--
-Please provide as much version information as possible:
-- if you have just installed a binary, provide the output of: kleingebaeck --version
-- if you installed from source, provide the output of: make show-version
-- provide additional details: operating system and version and shell environment
--->
-
-
-**Additional informations**

.github/ISSUE_TEMPLATE/bug_report_de.md

@@ -1,32 +0,0 @@
----
-name: Bugreport Deutsch
-about: Erzeuge einen Bugreport
-title: "[bug-report-de]"
-labels: bug
-assignees: TLINDEN
-
----
-
-**Beschreibung**
-<!-- Bitte beschreibe den Fehler klar und möglichst präzise: -->
-
-
-**Schritte um den Fehler zu reproduzieren**
-<!-- Bitte gib detailiert an, welche konkreten Schritte zum Fehler
-     geführt haben, führe kleingebaeck mit der Option -d option aus: -->
-
-
-**Erwartetes Verhalten**
-<!-- Welches Verhalten hast Du ursprünglich erwartet? -->
-
-
-**Versionsinformation**
-<!--
-Bitte gib uns so viel Versionsinfos wie möglich:
-- wenn Du nur das Programm installiert hast: kleingebaeck --version
-- wenn Du von Source installiert hast: make show-version
-- bitte gib zusätzliche Details an: Betriebssystem + Version, Shellumgebung etc.
--->
-
-
-**Zusätzliche Informationen**

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,23 +0,0 @@
----
-name: Feature request
-about: Suggest a feature
-title: "[feature-request]"
-labels: feature-request
-assignees: TLINDEN
-
----
-
-**Description**
-<!-- Please provide a clear and concise description of the feature you desire: -->
-
-
-
-**Version information**
-<!--
-Just in case the feature is already present, please provide as
-much version information as possible:
-- if you have just installed a binary, provide the output of: tablizer --version
-- if you installed from source, provide the output of: make show-version
-- provide additional details: operating system and version and shell environment
--->
-

.github/ISSUE_TEMPLATE/feature_request_de.md

@@ -1,20 +0,0 @@
----
-name: Featurerequest Deutsch
-about: Empfehle ein neues Feature
-title: "[feature-request-de]"
-labels: feature-request
-assignees: TLINDEN
-
----
-
-**Beschreibung**
-<!-- Bitte beschreibe das gewünschte Feature klar und möglichst präzise: -->
-
-
-**Versionsinformation**
-<!--
-Bitte gib uns so viel Versionsinfos wie möglich:
-- wenn Du nur das Programm installiert hast: kleingebaeck --version
-- wenn Du von Source installiert hast: make show-version
-- bitte gib zusätzliche Details an: Betriebssystem + Version, Shellumgebung etc.
--->

.github/ISSUE_TEMPLATE/note_to_self.md

@@ -1,8 +0,0 @@
----
-name: Note to self
-about: Internal bugs and wishes
-title: "[bug-report]"
-labels: bug
-assignees: TLINDEN
-
----

.github/dependabot.yml

@@ -1,10 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "gomod"
-    directory: "/"
-    schedule:
-      interval: "monthly"
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-        interval: "monthly"

.gitignore

@@ -1,8 +1,3 @@
 test
 kleingebaeck
 releases
-t/out
-.bak
-t/httproot/out
-t/httproot/kleinanzeigen
-t/httproot/favicon.ico

Makefile

@@ -0,0 +1,91 @@
+# Copyright © 2023 Thomas von Dein
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+#
+# no need to modify anything below
+tool      = kleingebaeck
+VERSION   = $(shell grep VERSION config.go | head -1 | cut -d '"' -f2)
+archs     = darwin freebsd linux windows
+PREFIX    = /usr/local
+UID       = root
+GID       = 0
+HAVE_POD := $(shell pod2text -h 2>/dev/null)
+
+all: $(tool).1 $(tool).go buildlocal
+
+%.1: %.pod
+ifdef HAVE_POD
+	  pod2man -c "User Commands" -r 1 -s 1 $*.pod > $*.1
+endif
+
+%.go: %.pod
+ifdef HAVE_POD
+	  echo "package main" > $*.go
+	  echo >> $*.go
+	  echo "var manpage = \`" >> $*.go
+	  pod2text $*.pod >> $*.go
+	  echo "\`" >> $*.go
+endif
+
+buildlocal:
+	CGO_LDFLAGS='-static' go build -tags osusergo,netgo -ldflags "-extldflags=-static" -o $(tool)
+
+install: buildlocal
+	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
+	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
+	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
+	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/
+
+clean:
+	rm -rf $(tool) coverage.out testdata
+
+test: clean
+	go test ./... $(ARGS)
+
+testfuzzy: clean
+	go test -fuzz ./... $(ARGS)
+
+singletest:
+	@echo "Call like this: make singletest TEST=TestPrepareColumns ARGS=-v"
+	go test -run $(TEST) $(ARGS)
+
+cover-report:
+	go test ./... -cover -coverprofile=coverage.out
+	go tool cover -html=coverage.out
+
+goupdate:
+	go get -t -u=patch ./...
+
+buildall:
+	./mkrel.sh $(tool) $(VERSION)
+
+release: buildall
+	gh release create v$(VERSION) --generate-notes releases/*
+
+show-versions: buildlocal
+	@echo "### kleingebaeck version:"
+	@./kleingebaeck -v
+
+	@echo
+	@echo "### go module versions:"
+	@go list -m all
+
+	@echo
+	@echo "### go version used for building:"
+	@grep -m 1 go go.mod
+
+lint:
+	golangci-lint run -p bugs -p unused

README-de.md

@@ -1,357 +0,0 @@
-## Kleingebäck - kleinanzeigen.de Backup
-
-![Kleingebaeck Logo](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleingebaecklogo-small.png)
-
-[![Go Report Card](https://goreportcard.com/badge/codeberg.org/scip/kleingebaeck)](https://goreportcard.com/report/codeberg.org/scip/kleingebaeck) 
-[![status-badge](https://ci.codeberg.org/api/badges/15530/status.svg)](https://ci.codeberg.org/repos/15530)
-![GitHub License](https://img.shields.io/github/license/tlinden/kleingebaeck)
-[![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://codeberg.org/scip/kleingebaeck/releases)
-[![English](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/english.png)](https://codeberg.org/scip/kleingebaeck/raw/branch/main/README.md)
-
-Mit diesem Tool kann man seine Anzeigen bei https://kleinanzeigen.de sichern.
-
-> [!IMPORTANT]
-> Diese Software wird jetzt bei Codeberg weitergepflegt: [Codeberg](https://codeberg.org/scip/kleingebaeck/).
-
-Es kann alle Anzeigen eines Users (oder nur eine Ausgewählte)
-inklusive der Bilder herunterladen, die in einem Verzeichnis pro
-Anzeige gespeichert werden. In dem Verzeichnis wird eine Datei
-`Adlisting.txt` erstellt, in der sich die Inhalte der Anzeige wie
-Titel, Preis, Text etc befinden. Bilder werden natürlich auch heruntergeladen.
-
-## ACHTUNG - SICHERHEITS-UPDATE
-
-Fertige vorcompilierte Programme älter als Version `v0.3.12` sind von
-Schwachstellen in der Behandlung von HTTP und Zertifikaten
-betroffen. Falls Du eine ältere Kleingebäck-Version im Einsatz hast,
-bitte update auf Version `v0.3.12` oder höher. Bitte lies auch die [Release Notes für
-v0.3.12](https://codeberg.org/scip/kleingebaeck/releases/tag/v0.3.12)
-für mehr Details.
-
-## Screenshots
-
-Das ist die Hauptseite meines kleinanzeigen.de Accounts:
-
-![Index](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-index.png)
-
-Sichern ich meine Anzeigen:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-download.png)
-
-Backupverzeichnis nach dem Download:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-backup.png)
-
-Verzeichnis einer Anzeige:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-ad.png)
-
-**Das gleiche unter Windows:**
-
-Anzeigen Sichern:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/cmd-windows.jpg)
-
-Backupverzeichnis nach dem Download
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/liste-windows.jpg)
-
-Und eine Anzeige:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/adlisting-windows.jpg)
-
-## Installation
-
-Das Tool hat keine weiteren Abhängigkeiten und erfordert auch keine
-Anmeldung oder ähnliches. Man kädt sich einfach die ausführbare Datei
-für seine Plattform herunter und kann direkt loslegen.
-
-### Installation des vorcompilierten Programms
-
-Auf der Seite [des letzten Releases](https://codeberg.org/scip/kleingebaeck/releases) findet man das Program für sein Betriebssystem und die Plattform (z.b. Windows + Intel)
- 
-Es gibt 2 Varianten:
-
-1. Direkt das fertige Program für seine Plattform+OS herunterladen,
-   z.B. `kleingebaeck-linux-amd64-0.0.5`, nach `kleingebaeck`
-   umbenennen und in ein Verzeichnis kopieren, das im `PATH` ist,
-   (z.B. nach `$HOME/bin` oder als root nach `/usr/local/bin`).
-
-Um sicher zu gehen, dass an dem Program nicht verändert wurde, kann
-man die Signatur vergleichen. Für jeden Download gibt es eine dazu
-passende Signatur, in unserem Beispiel wäre das
-`kleingebaeck-linux-amd64-0.0.5.sha256`.
-
-Zum Verifizieren ausführen:
-
-```shell
-cat kleingebaeck-linux-amd64-0.0.5.sha25 && sha256sum kleingebaeck-linux-amd64-0.0.5
-```
-Man sollte zweimal den gleichen SHA256 Hash sehen.
-
-2. Man kann auch einen Tarball (tgz Dateiendung) herunterladen,
-   auspacken und mit GNU Make installieren:
-
-```shell
-tar xvfz kleingebaeck-linux-amd64-0.0.5.tar.gz
-cd kleingebaeck-linux-amd64-0.0.5
-sudo make install
-```
-
-### Installation aus dem Sourcecode
-
-Man muss eine funktionierende Go Buildumgebung in der Version 1.21
-installiert haben, um das Programm selber zu compilieren. GNU Make ist
-hilfreich, aber nicht unbedingt erforderlich.
-
-Um das Programm zu compilieren, muss man folgende Schritte ausführen:
-
-```shell
-git clone https://codeberg.org/scip/kleingebaeck.git
-cd kleingebaeck
-go mod tidy
-make # (oder make)
-sudo make install
-```
-
-### Docker image benutzen
-
-Ein fertiges Dockerimage mit der aktuellen Programmversion ist immer
-verfügbar. Man kann damit z.B. das Tool testen, bevor man es dauerhaft
-benutzen möchte.
-
-Um das Image herunterzuladen:
-```
-docker pull ghcr.io/tlinden/kleingebaeck:latest
-```
-
-Um kleingebäck im Image auszuführen und Daten ins lokale Filesystem zu
-sichern, kann man so vorgehen:
-
-```shell
-mkdir anzeigen
-docker run -u `id -u $USER` -v ./anzeigen:/backup ghcr.io/tlinden/kleingebaeck:latest -u XXX -v
-ls -l anzeigen/ein-buch-mit-leeren-seiten
-total 792
-drwxr-xr-x 2 scip root   4096 Jan 23 12:58 ./
-drwxr-xr-x 3 scip scip   4096 Jan 23 12:58 ../
--rw-r--r-- 1 scip root 131650 Jan 23 12:58 1.jpg
--rw-r--r-- 1 scip root  81832 Jan 23 12:58 2.jpg
--rw-r--r-- 1 scip root 134050 Jan 23 12:58 3.jpg
--rw-r--r-- 1 scip root   1166 Jan 23 12:58 Adlisting.txt
-```
-
-Hier wird der aktuelle User auf den User im Image gemappt und das
-lokale Verzeichnis `anzeigen` nach `/backup` innerhalb des Images
-gemountet.
-
-Die Optionen `-u XXX -v` sind kleingebäck Optionen. Ersetze `XXX`
-durch Deine tatsächliche kleinanzeigen.de Userid.
-
-Eine Liste verfügbarer Images findet man [hier](https://codeberg.org/scip/kleingebaeck/pkgs/container/kleingebaeck/versions?filters%5Bversion_type%5D=tagged)
-
-## Kommandozeilen Optionen:
-
-```
-Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
-Options:
--u --user    <uid>      Backup ads from user with uid <uid>.
--d --debug              Enable debug output.
--v --verbose            Enable verbose output.
--o --outdir  <dir>      Set output dir (default: current directory)
--l --limit   <num>      Limit the ads to download to <num>, default: load all.
--c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
-   --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
--m --manual             Show manual.
--h --help               Show usage.
--V --version            Show program version.
-
-If one  or more <ad-listing-url>'s  are specified, only  backup those,
-otherwise backup all ads of the given user.
-```
-
-## Konfiguration
-
-Man    kann    anstelle     von    Kommandlineoptionen    auch    eine
-Konfigurationsdatei  verwenden.  Sie  befindet  sich standardmäßig  in
-`~/.kleingebaeck`  aber man  kann  mit dem  Parameter  `-c` auch  eine
-andere Datei angeben.
-
-Das Format (TOML) ist einfach:
-
-```
-user = 1010101
-loglevel = verbose
-outdir = "test"
-```
-
-Im Source gibt es eine Beispieldatei `example.conf` mit Kommentaren.
-
-## Umgebungsvariablen
-
-Man kann darüber hinaus auch Umgebungsvariablen verwenden. Sie
-entsprechen den Konfigurationsoptionen, aber gross geschrieben mit dem
-Präfix `KLEINGEBAECK_`, z.B.
-
-```shell
-% KLEINGEBAECK_OUTDIR=/backup kleingebaeck -v
-```
-
-## Benutzung
-
-Um das Tool einsetzen zu können, muss man zunächst seine Userid bei
-kleinanzeigen.de herausfinden. Dazu ruft man am besten die Liste
-seiner Anzeigen auf, während man NICHT eingeloggt ist:
-
-https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
-
-Der `XXXXX` Teil der URL ist die Userid.
-
-Trage diese Userid in der Konfigurationsdatei ein wie oben
-beschrieben. Gib ausserdem das Ausgabeverzeichnis an. Dann einfach nur
-`kleingebaeck` ausführen.
-
-Innerhalb des Ausgabeverzeichnisses wird sich dann pro Anzeige ein
-Unterverzeichnis befinden. Pro Anzeige gibt es eine Datei
-`Adlisting.txt`, die etwa so aussieht:
-
-```default
-Title: A book I sell
-Price: 99 € VB
-Id: 1919191919
-Category: Sachbücher
-Condition: Sehr Gut
-Created: 10.12.2023
-
-This is the description text.
-
-Pay with paypal.
-```
-
-Sowie alle Bilder.
-
-Das Format kann man mit der Variable `template` in der Konfiguration
-ändern. Die `example.conf` enthält ein Beispiel für das Standard Template.
-
-## Verhalten des Tools
-
-Es gibt einige Dinge über das Verhalten von kleingebäck, über die Du
-Bescheid wissen solltest:
-
-- alle HTML Seiten und Bilder werden immer heruntergeladen
-- es wird ein (konfigurierbarer) Useragent verwendet
-- HTTP Cookies werden beachtet
-- bei Fehlern wird dreimal mit unterschiedlichem Abstand erneut
-  versucht
-- Bilder Downloads laufen parallelisiert mit leicht unterschiedlichen
-  zeitlichen Abständen ab
-- Gleich aussehende Bilder werden nicht überschrieben
-
-Der letzte Punkt muss genauer erläutert werden:
-
-Wenn man bei Kleinanzeigen.de eine Anzeige einstellt und Bilder
-postet, werden diese dort in ihrer Grösse reduziert (durch Kompression
-und Verkleinerung der Bilder usw.). Diese reduzierten Bilder werden
-dann von kleingebäck heruntergeladen. Falls Du Deine original Bilder
-behalten hast, kannst Du diese danach in das Backupverzeichnis
-kopieren. Bei einem erneuten kleingebäck-Lauf werden diese Bilder dann
-nicht überschrieben.
-
-Wir verwenden dafür einen Algorythmus namens [distance
-hashing](https://github.com/corona10/goimagehash). Dieser Algorithmus
-prüft die Ähnlichkeit von Bildern. Diese können in ihrer Auflösung,
-Kompression, Farbtiefe und vielem mehr manipuliert worden sein und
-trotzdem als das "gleiche Bild" erkannt werden (wohlgemerkt nicht "das
-selbe": die Dateien sind durchaus unterschiedlich!). Bis zu einer
-Distance von 5 überschreiben wir keine Bilder, weil wir dann davon
-ausgehen, dass das lokal Vorhandene das Original ist.
-
-Bitte beachte aber, dass dies KEIN Cachingmechanismus ist: die Bilder
-werden trotzdem immer alle heruntergeladen. Das muss so sein, da wir
-uns nicht die Dateinamen anschauen können, da kleinanzeigen.de diese
-nämlich zu Zahlen umbenennt. Und die Dateinamen können sich auch
-ändern, wenn der User in der Anzeige die Bilder umarrangiert hat.
-
-Du kannst dieses Verhalten mit der Option **--force** ausschalten. Du
-kannst ausserdem mit der Option **--ignoreerrors** auch alle Fehler
-ignorieren, die beim Bilderdownload auftreten könnten.
-
-## Documentation
-
-Die Dokumentation kann man
-[online](https://codeberg.org/scip/kleingebaeck/raw/branch/main/kleingebaeck.pod)
-oder lokal lesen mit: `kleingebaeck --manual`. Hat man das Tool mit
-dem Tarball installiert, funktioniert auch `man kleingebaeck`.
-
-## Kleingebäck?
-
-Der Name kommt von "kleinanzeigen backup", verkürzt "klein back", das
-englisch ausgesprochene "back" (deutsch bäck) führt dann zu "Kleingebäck".
-
-## Wo bekommt man Hilfe
-
-Obwohl ich gerne von kleingebäck Benutzern in privaten Mails höre, ist
-das doch der beste Weg, die Anfrage zu übersehen und zu vergessen.
-
-Um einen Fehler, ein unerwartetes Verhalten, eine Feature Request oder
-einen Patch zu übermitteln, eröffne daher bitte einen Issue unter:
-https://codeberg.org/scip/kleingebaeck/issues. Danke!
-
-Bitte gebe den fehlgeschlagenen Befehl an, rufe es auch mit Debugging
-`-d` auf.
-
-## Ähnliche Projekte
-
-Ich konnte kein Projekt finden, das speziell dafür geeignet ist,
-Anzeigen bei kleinanzeigen.de zu sichern.
-
-Aber es gibt ein Projekt, mit dem man ebenfalls Backups erstellen
-kann:  [kleinanzeigen-bot](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/).
-Aber Vorsicht: kleinanzeigen.de bekämpft Bots aktiv, mit diesem hier
-gibt es regelmäßige Probleme, z.B.: 
-[issue](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/issues/219).
-Das Hauptproblem ist, dass diese Art von Bot sich mit Deinem Account
-aktiv einloggt und mit der Seite interagiert. Damit kann die Firma die
-Aktivitäten recht einfach Deinem User zuordnen und diesen **sperren**!
-Also sei bitte vorsichtig!
-
-**Kleingebäck** erfordert keinen Login, es verwendet lediglich die
-öffentlich verfügbare Webseite und ruft diese auf, wie ein normaler
-Browser. Tatsächlich gibt es meiner Meinung nach keinen Unterschied zu
-einem Browserclient: beide laufen auf Anwenderseite auf Initiative
-eines Benutzers. Und mit welchen Browser ich eine Webseite aufrufe,
-bleibt immer noch mir überlassen und muss mir nicht von irgendwem
-vorgeschrieben werden. Das schliesst die Verwendung von Kleingebäck
-mit ein.
-
-Hinzu kommt, dass dieses Tool nicht dazu gedacht ist, rund um die Uhr
-zu laufen. Man ruft es ab und zu mal auf, wenn man halt neue Anzeigen
-eingestellt hat, vielleicht einmal die Woche oder so. Man weiss ja
-selber, wann man was geändert hat. Man benötigt trotzdem den Zugriff
-mit dem Browser oder der mobilen App um Kleinanzeigen.de verwalten zu
-können.
-
-Meiner Ansicht nach ist das Risiko also sehr minimal, es handelt sich
-meiner Meinung nach auch nicht um eine Verletzung der AGBs dort. Aber
-das ist nur meine persönliche Meinung, bitte beachtet das. Am Ende
-müsst Ihr selbst einschätzen und beurteilen wie hoch Ihr das Risiko
-seht und ob Ohr es eingehen möchtet. Für eventuell auftretende
-Konsequenzen bin ich nicht verantwortlich. Siehe auch [GPL Lizenz](LICENSE).
-
-Es       gibt      noch       ein      weiteres       Tool      namens
-[kleinanzeigen-enhanded](https://kleinanzeigen-enhanced.de/).  Das ist
-eine    kostenpflichtige     vollständige    Anzeigenverwaltung    für
-Profinutzer. Man  muss eine  monatliche Abogebühr bezahlen.   Das Tool
-ist  als  Browsererweiterung  für  Google  Chrome  implementiert,  was
-erklärt,  warum sie  Anzeigen  erstellen, ändern  und löschen  können,
-obwohl es  gar keine  öffentliche API gibt.   Sieht nach  einer netten
-ausgereiften Lösung aus. Mit Backups.
- 
-## Copyright und License
-
-Lizensiert unter der GNU GENERAL PUBLIC LICENSE Version 3.
-
-## Autor
-
-T.v.Dein <tom AT vondein DOT org>
-

README.md

@@ -1,17 +1,12 @@
 ## Kleingebäck - kleinanzeigen.de Backup
 
-![Kleingebaeck Logo](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleingebaecklogo-small.png)
+![Kleingebaeck Logo](https://github.com/TLINDEN/kleingebaeck/blob/main/.github/assets/kleingebaecklogo-small.png)
 
-[![Go Report Card](https://goreportcard.com/badge/codeberg.org/scip/kleingebaeck)](https://goreportcard.com/report/codeberg.org/scip/kleingebaeck) 
-[![status-badge](https://ci.codeberg.org/api/badges/15530/status.svg)](https://ci.codeberg.org/repos/15530)
+[![License](https://img.shields.io/badge/license-GPL-blue.svg)](https://github.com/tlinden/kleingebaeck/blob/master/LICENSE)
+[![Go Report Card](https://goreportcard.com/badge/github.com/tlinden/kleingebaeck)](https://goreportcard.com/report/github.com/tlinden/kleingebaeck) 
 ![GitHub License](https://img.shields.io/github/license/tlinden/kleingebaeck)
-[![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://codeberg.org/scip/kleingebaeck/releases)
-[![German](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/german.png)](https://codeberg.org/scip/kleingebaeck/raw/branch/main/README-de.md)
+[![GitHub release](https://img.shields.io/github/v/release/tlinden/kleingebaeck?color=%2300a719)](https://github.com/TLINDEN/kleingebaeck/releases/latest)
 
-[Die deutsche Version des READMEs findet Ihr hier](README-de.md).
-
-> [!IMPORTANT]
-> This software is now being maintained on [Codeberg](https://codeberg.org/scip/kleingebaeck/).
 
 This tool can be used to backup ads on the german ad page https://kleinanzeigen.de
 
@@ -20,47 +15,6 @@ directory, each ad into its own subdirectory. The backup will contain
 a textfile `Adlisting.txt` which contains the ad contents as the
 title, body, price etc. All images will be downloaded as well.
 
-## CAUTION - SECURITY UPDATE
-
-Binary releases prior to version `v0.3.11` are affected by
-vulnerabilities in HTTP and certificate handling. If you are using
-such a binary, please update to `v0.3.12` or higher. Please also refer
-to the [Release Notes of
-v0.3.12](https://codeberg.org/scip/kleingebaeck/releases/tag/v0.3.12)
-for more details.
-
-## Screenshots
-
-This is the index of my kleinanzeigen.de Account:
-
-![Index](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-index.png)
-
-Here I download my ads on the commandline:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-download.png)
-
-And this is the backup directory after download:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-backup.png)
-
-Here's a directory for one ad:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/kleinanzeigen-ad.png)
-
-**The same thing under windows:**
-
-Downloading ads:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/cmd-windows.jpg)
-
-Backup directory after download:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/liste-windows.jpg)
-
-And one ad listing directory:
-
-![Download](https://codeberg.org/scip/kleingebaeck/raw/branch/main/.github/assets/adlisting-windows.jpg)
-
 ## Installation
 
 The   tool  doesn't   need   authentication  and   doesn't  have   any
@@ -70,10 +24,10 @@ releases page and you're good to go.
 ### Installation using a pre-compiled binary
 
 Go            to             the            [latest            release
-page](https://codeberg.org/scip/kleingebaeck/releases)     and
+page](https://github.com/TLINDEN/kleingebaeck/releases/latest)     and
 look for your OS and platform. There are two options to install the binary:
 
-1.    Directly   download    the    binary    for   your    platform,
+1.    Directly   download    the    binary    for   your    platoform,
    e.g. `kleingebaeck-linux-amd64-0.0.5`, rename  it to `kleingebaeck`
    (or  whatever  you  like  more!)  and put  it  into  your  bin  dir
    (e.g. `$HOME/bin` or as root to `/usr/local/bin`).
@@ -107,56 +61,19 @@ installed - `make`.
 
 To install after building either copy the binary or execute `sudo make install`.
 
-### Using the docker image
-
-A pre-built docker  image is available, which you can  use to test the
-app without  installing it. To download:
-
-```shell
-docker pull ghcr.io/tlinden/kleingebaeck:latest
-```
-
-To execute kleingebaeck  inside the image and download ads  to a local
-directory, do something like this:
-
-```shell
-mkdir myads
-docker run -u `id -u $USER` -v ./myads:/backup ghcr.io/tlinden/kleingebaeck:latest -u XXX -v
-ls -l myads/ein-buch-mit-leeren-seiten
-total 792
-drwxr-xr-x 2 scip root   4096 Jan 23 12:58 ./
-drwxr-xr-x 3 scip scip   4096 Jan 23 12:58 ../
--rw-r--r-- 1 scip root 131650 Jan 23 12:58 1.jpg
--rw-r--r-- 1 scip root  81832 Jan 23 12:58 2.jpg
--rw-r--r-- 1 scip root 134050 Jan 23 12:58 3.jpg
--rw-r--r-- 1 scip root   1166 Jan 23 12:58 Adlisting.txt
-```
-
-We map the local user to the one inside the image so the permission
-will match. You'll need to create the directory first before executing
-docker run. And the local directory `myads` will be mapped to
-`/backup` inside the container.
-
-The options `-u XXX -v` are kleingebaeck options, replace `XXX` with
-your actual kleinanzeigen.de user id.
-
-A list of available images is  [here](https://codeberg.org/scip/kleingebaeck/pkgs/container/kleingebaeck/versions?filters%5Bversion_type%5D=tagged)
-
 ## Commandline options:
 
 ```
 Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
 Options:
--u --user    <uid>      Backup ads from user with uid <uid>.
--d --debug              Enable debug output.
--v --verbose            Enable verbose output.
--o --outdir  <dir>      Set output dir (default: current directory)
--l --limit   <num>      Limit the ads to download to <num>, default: load all.
--c --config  <file>     Use config file <file> (default: ~/.kleingebaeck).
-   --ignoreerrors       Ignore HTTP errors, may lead to incomplete ad backup.
--m --manual             Show manual.
--h --help               Show usage.
--V --version            Show program version.
+--user    -u <uid>      Backup ads from user with uid <uid>.
+--debug   -d            Enable debug output.
+--verbose -v            Enable verbose output.
+--outdir  -o <dir>      Set output dir (default: current directory)
+--limit   -l <num>      Limit the ads to download to <num>, default: load all.
+--config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
+--manual  -m            Show manual.
+--help    -h            Show usage.
 
 If one  or more <ad-listing-url>'s  are specified, only  backup those,
 otherwise backup all ads of the given user.
@@ -176,13 +93,6 @@ loglevel = verbose
 outdir = "test"
 ```
 
-## Environment Variables
-
-Kleingebaeck can also be configured using environment variables. Just prefix the config variables with `KLEINGEBAECK_` and put them to upper case. Eg:
-```shell
-% KLEINGEBAECK_OUTDIR=/backup kleingebaeck -v
-```
-
 ## Usage
 
 To setup the tool, you need to lookup your userid on
@@ -203,11 +113,9 @@ somewhat like this:
 ```default
 Title: A book I sell
 Price: 99 € VB
-Shipping: 6,90 €
 Id: 1919191919
 Category: Sachbücher
 Condition: Sehr Gut
-Type: Buch
 Created: 10.12.2023
 
 This is the description text.
@@ -220,52 +128,6 @@ variable. The supplied sample config contains the default template.
 
 All images will be stored in the same directory.
 
-## Tool Behavior
-
-There are a bunch of things you might want to know about the behavior
-of the kleingebäck tool:
-
-- all HTML pages and IMAGEs are always being downloaded
-- we use a (customizable) user agent
-- we respect HTTP cookies
-- in the case of an error, the tool does 3 retries, the time it waits
-  between tries is longer for each retry
-- image download is parallized using small time differences to look
-  more natural
-- same images are not being overwritten on subsequent download
-
-
-The latter needs to be elaborated a bit more:
-
-If you publish an ad on kleinanzeigen.de and post images, those images
-will be reduced in size by the site (by compressing and down sizing
-them). This reduced images will be downloaded by kleingebäck. However,
-you may still own the original images and may want to put them into
-that backup directory so that you have all things for one ad together.
-
-You can easily do that, because kleingebäck won't overwrite those
-original images. It uses something called a distance hash using
-[goimagehash](https://github.com/corona10/goimagehash). This
-algorithmus checks the similarity of images. If an image has been
-resized it is still very similar to the original one. We accept a
-maximum of a distance of 5, everything above leads to overwrite.
-
-This works with resizes, cropped and otherwise manipulated images as
-long as the image still shows the original contents good enough.
-
-Also note, that this is NOT a caching mechanism: the images will be
-downloaded anyway during each run. We also can't look at the file
-names because kleinanzeigen.de renames all images to numbers. And
-those might even change if the user re-arranges the images.
-
-You can override this behavior using the **--force** option. Another
-option, **--ignoreerrors**, can be used to ignore all kinds of image
-errors. 
-
-## Documentation
-
-You can read the documentation [online](https://codeberg.org/scip/kleingebaeck/raw/branch/main/kleingebaeck.pod) or locally once you have installed kleingebaeck with: `kleingebaeck --manual`.
-
 ## Kleingebäck?
 
 The name is derived from "kleinanzeigen backup": "klein" (german for
@@ -280,40 +142,12 @@ that's the best way for me to forget to do something.
 
 In order to report a bug,  unexpected behavior, feature requests or to
 submit    a    patch,    please    open   an    issue    on    github:
-https://codeberg.org/scip/kleingebaeck/issues.
+https://github.com/TLINDEN/kleingebaeck/issues.
 
 Please repeat the failing command with debugging enabled `-d` and
 include the output in the issue.
 
-## Related projects
-
-I could not find any projects specifically designed to backup
-kleinanzeigen.de ads, however there's a bot project which is also able
-to download ads:
-[kleinanzeigen-bot](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/). However,
-be aware that kleinanzeigen.de is actively fighting bots! Look at this
-[issue](https://github.com/Second-Hand-Friends/kleinanzeigen-bot/issues/219). The
-problem with these kind of bots is, that they login into your account
-using your credentials. If the company is able to detect bot activity
-they can associate it easily with your account and **lock you
-out**. So be careful.
-
-**kleingebäck** doesn't need to login, it just accesses public
-available web pages. Kleinanzeigen.de could hardly do anything against
-it, once because it is legal. There's no difference between a browser
-and a commandline client. Both run on the clientside and it is not
-kleinanzeigen.de's decision which software one uses to access their
-pages. And second: because you can use it to download any ads, not
-just yours. So it is not really clear if the activity is associated in
-any way with the ad owner. In addition to that comes the fact that
-kleingebäck is just a backup tool. It is not intendet to be used on a
-daily basis. You cannot use it to view regular ads or maintain your
-own ads. You'll need to use the mobile app or the browser page with a
-login. So, in my point of view, the risk is very minimal.
-
-There is another Tool available named [kleinanzeigen-enhanced](https://kleinanzeigen-enhanced.de/). It is a complete Ad management system targeting primarily commercial users. You have to pay a monthly fee, perhaps there's also a free version available, but I haven't checked. The tool is implemented as a Chrome browser extension, which explains why it was possible to implement it without an API. It seems to be a nice solution for power users by the looks of it. And it includes backups.
-
-## Copyright and License
+## Copyright und License
 
 Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
 

config.go

@@ -0,0 +1,178 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+package main
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/knadh/koanf/parsers/toml"
+	"github.com/knadh/koanf/providers/confmap"
+	"github.com/knadh/koanf/providers/file"
+	"github.com/knadh/koanf/providers/posflag"
+	"github.com/knadh/koanf/v2"
+	flag "github.com/spf13/pflag"
+)
+
+const (
+	VERSION         string = "0.1.0"
+	Baseuri         string = "https://www.kleinanzeigen.de"
+	Listuri         string = "/s-bestandsliste.html"
+	Defaultdir      string = "."
+	DefaultTemplate string = "Title: {{.Title}}\nPrice: {{.Price}}\nId: {{.Id}}\n" +
+		"Category: {{.Category}}\nCondition: {{.Condition}}\nCreated: {{.Created}}\n\n{{.Text}}\n"
+	DefaultTemplateWin string = "Title: {{.Title}}\r\nPrice: {{.Price}}\r\nId: {{.Id}}\r\n" +
+		"Category: {{.Category}}\r\nCondition: {{.Condition}}\r\nCreated: {{.Created}}\r\n\r\n{{.Text}}\r\n"
+	Useragent string = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) " +
+		"AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36"
+)
+
+const Usage string = `This is kleingebaeck, the kleinanzeigen.de backup tool.
+
+Usage: kleingebaeck [-dvVhmoclu] [<ad-listing-url>,...]
+
+Options:
+--user    -u <uid>      Backup ads from user with uid <uid>.
+--debug   -d            Enable debug output.
+--verbose -v            Enable verbose output.
+--outdir  -o <dir>      Set output dir (default: current directory)
+--limit   -l <num>      Limit the ads to download to <num>, default: load all.
+--config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
+--manual  -m            Show manual.
+--help    -h            Show usage.
+--version -V            Show program version.
+
+If one  or more ad listing url's  are specified, only  backup those,
+otherwise backup all ads of the given user.`
+
+type Config struct {
+	Verbose          bool   `koanf:"verbose"` // loglevel=info
+	Debug            bool   `koanf:"debug"`   // loglevel=debug
+	Showversion      bool   `koanf:"version"` // -v
+	Showhelp         bool   `koanf:"help"`    // -h
+	Showmanual       bool   `koanf:"manual"`  // -m
+	User             int    `koanf:"user"`
+	Outdir           string `koanf:"outdir"`
+	Template         string `koanf:"template"`
+	Loglevel         string `koanf:"loglevel"`
+	Limit            int    `koanf:"limit"`
+	Adlinks          []string
+	StatsCountAds    int
+	StatsCountImages int
+}
+
+func (c *Config) IncrAds() {
+	c.StatsCountAds++
+}
+
+func (c *Config) IncrImgs(num int) {
+	c.StatsCountImages += num
+}
+
+// load commandline flags and config file
+func InitConfig() (*Config, error) {
+	var k = koanf.New(".")
+
+	// determine template based on os
+	template := DefaultTemplate
+	if runtime.GOOS == "windows" {
+		template = DefaultTemplateWin
+	}
+
+	// Load default values using the confmap provider.
+	k.Load(confmap.Provider(map[string]interface{}{
+		"template": template,
+		"outdir":   ".",
+		"loglevel": "notice",
+		"userid":   0,
+	}, "."), nil)
+
+	// setup custom usage
+	f := flag.NewFlagSet("config", flag.ContinueOnError)
+	f.Usage = func() {
+		fmt.Println(Usage)
+		os.Exit(0)
+	}
+
+	// parse commandline flags
+	f.StringP("config", "c", "", "config file")
+	f.StringP("outdir", "o", "", "directory where to store ads")
+	f.IntP("user", "u", 0, "user id")
+	f.IntP("limit", "l", 0, "limit ads to be downloaded (default 0, unlimited)")
+	f.BoolP("verbose", "v", false, "be verbose")
+	f.BoolP("debug", "d", false, "enable debug log")
+	f.BoolP("version", "V", false, "show program version")
+	f.BoolP("help", "h", false, "show usage")
+	f.BoolP("manual", "m", false, "show manual")
+
+	f.Parse(os.Args[1:])
+
+	// generate a  list of config files to try  to load, including the
+	// one provided via -c, if any
+	var configfiles []string
+	configfile, _ := f.GetString("config")
+	home, _ := os.UserHomeDir()
+	if configfile != "" {
+		configfiles = []string{configfile}
+	} else {
+		configfiles = []string{
+			"/etc/kleingebaeck.conf", "/usr/local/etc/kleingebaeck.conf", // unix variants
+			filepath.Join(home, ".config", "kleingebaeck", "config"),
+			filepath.Join(home, ".kleingebaeck"),
+			"kleingebaeck.conf",
+		}
+	}
+
+	// Load the config file[s]
+	for _, cfgfile := range configfiles {
+		if path, err := os.Stat(cfgfile); !os.IsNotExist(err) {
+			if !path.IsDir() {
+				if err := k.Load(file.Provider(cfgfile), toml.Parser()); err != nil {
+					return nil, errors.New("error loading config file: " + err.Error())
+				}
+			}
+		}
+		// else: we ignore the file if it doesn't exists
+	}
+
+	// command line overrides config file
+	if err := k.Load(posflag.Provider(f, ".", k), nil); err != nil {
+		return nil, errors.New("error loading flags: " + err.Error())
+	}
+
+	// fetch values
+	conf := &Config{}
+	if err := k.Unmarshal("", &conf); err != nil {
+		return nil, errors.New("error unmarshalling: " + err.Error())
+	}
+
+	// adjust loglevel
+	switch conf.Loglevel {
+	case "verbose":
+		conf.Verbose = true
+	case "debug":
+		conf.Debug = true
+	}
+
+	// are there any args left on commandline? if so threat them as adlinks
+	conf.Adlinks = f.Args()
+
+	return conf, nil
+}

example.conf

@@ -0,0 +1,30 @@
+#
+# kleingebaeck sample configuration file.
+# put this to ~/.kleingebaeck.
+#
+# Comments start with the '#' character.
+
+# kleinanzeigen.de user-id. must be an unquoted number
+user = 00000000
+
+# enable verbose output (same as -v), may be true or false.
+# other values: notice or debug
+loglevel = "verbose"
+
+# directory where  to store downloaded  ads. kleingebaeck will  try to
+# create it. must be a quoted string.
+outdir = "test"
+
+# template for  stored adlistings.  To enable  it, remove  the comment
+# chars up until the last #"""
+#template="""
+#Title: {{.Title}}
+#Price: {{.Price}}
+#Id: {{.Id}}
+#Category: {{.Category}}
+#Condition: {{.Condition}}
+#Created: {{.Created}}
+
+#{{.Text}}
+# """
+

go.mod

@@ -0,0 +1,30 @@
+module kleingebaeck
+
+go 1.21
+
+require (
+	astuart.co/goq v1.0.0
+	github.com/knadh/koanf/parsers/toml v0.1.0
+	github.com/knadh/koanf/providers/confmap v0.1.0
+	github.com/knadh/koanf/providers/file v0.1.0
+	github.com/knadh/koanf/providers/posflag v0.1.0
+	github.com/knadh/koanf/v2 v2.0.1
+	github.com/lmittmann/tint v1.0.3
+	github.com/mattn/go-isatty v0.0.20
+	github.com/spf13/pflag v1.0.5
+)
+
+require (
+	github.com/PuerkitoBio/goquery v1.5.0 // indirect
+	github.com/andybalholm/cascadia v1.0.0 // indirect
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/knadh/koanf/maps v0.1.1 // indirect
+	github.com/mitchellh/copystructure v1.2.0 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/pelletier/go-toml v1.9.5 // indirect
+	golang.org/x/net v0.0.0-20190606173856-1492cefac77f // indirect
+	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+
+)

go.sum

@@ -0,0 +1,57 @@
+astuart.co/goq v1.0.0 h1:nnYIhu/Z/j0VaX9Dp+pmh2Uh7ldEz6XfgSg+bAY5Yrw=
+astuart.co/goq v1.0.0/go.mod h1:+fokcnFrO8Pw2fj8drdStJvzoMFebJH69rw8IC21rno=
+github.com/PuerkitoBio/goquery v1.5.0 h1:uGvmFXOA73IKluu/F84Xd1tt/z07GYm8X49XKHP7EJk=
+github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
+github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
+github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.6.0 h1:n+5WquG0fcWoWp6xPWfHdbskMCQaFnG6PfBrh1Ky4HY=
+github.com/fsnotify/fsnotify v1.6.0/go.mod h1:sl3t1tCWJFWoRz9R8WJCbQihKKwmorjAbSClcnxKAGw=
+github.com/knadh/koanf/maps v0.1.1 h1:G5TjmUh2D7G2YWf5SQQqSiHRJEjaicvU0KpypqB3NIs=
+github.com/knadh/koanf/maps v0.1.1/go.mod h1:npD/QZY3V6ghQDdcQzl1W4ICNVTkohC8E73eI2xW4yI=
+github.com/knadh/koanf/parsers/toml v0.1.0 h1:S2hLqS4TgWZYj4/7mI5m1CQQcWurxUz6ODgOub/6LCI=
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kleingebaeck.1

@@ -0,0 +1,241 @@
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+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "KLEINGEBAECK 1"
+.TH KLEINGEBAECK 1 "2023-12-19" "1" "User Commands"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH "NAME"
+kleingebaeck \- kleinanzeigen.de backup tool
+.SH "SYNOPSYS"
+.IX Header "SYNOPSYS"
+.Vb 10
+\&    Usage: kleingebaeck [\-dvVhmoc] [<ad\-listing\-url>,...]
+\&    Options:
+\&    \-\-user    \-u <uid>      Backup ads from user with uid <uid>.
+\&    \-\-debug   \-d            Enable debug output.
+\&    \-\-verbose \-v            Enable verbose output.
+\&    \-\-outdir  \-o <dir>      Set output dir (default: current directory)
+\&    \-\-limit   \-l <num>      Limit the ads to download to <num>, default: load all.
+\&    \-\-config  \-c <file>     Use config file <file> (default: ~/.kleingebaeck).
+\&    \-\-manual  \-m            Show manual.
+\&    \-\-help    \-h            Show usage.
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+This tool can be used to backup ads on the german ad page <https://kleinanzeigen.de>.
+.PP
+It downloads all (or  only the specified ones) ads of  one user into a
+directory, each ad into its own subdirectory. The backup will contain
+a textfile \fBAdlisting.txt\fR which contains the ad contents such as
+title, body, price etc. All images will be downloaded as well.
+.SH "CONFIGURATION"
+.IX Header "CONFIGURATION"
+You   can  create   a  config   file  to   save  typing.   By  default
+\&\f(CW\*(C`~/.kleingebaeck\*(C'\fR is being used but you can specify one with \f(CW\*(C`\-c\*(C'\fR as
+well.   We    use   \s-1TOML\s0   as   our    configuration   language.   See
+<https://toml.io/en/>.
+.PP
+Format is pretty simple:
+.PP
+.Vb 10
+\&    user = 1010101
+\&    loglevel = verbose
+\&    outdir = "test"
+\&    template = """
+\&    Title: {{.Title}}
+\&    Price: {{.Price}}
+\&    Id: {{.Id}}
+\&    Category: {{.Category}}
+\&    Condition: {{.Condition}}
+\&    Created: {{.Created}}
+\&
+\&    {{.Text}}
+\&    """
+.Ve
+.PP
+Be carefull  if you want  to change the  template.  The variable  is a
+multiline string surrounded  by three double quotes. You  can left out
+certain   fields  and   use  any   formatting  you   like.  Refer   to
+<https://pkg.go.dev/text/template>  for   details  how  to   write  a
+template.
+.PP
+If you're on  windows and want to customize the  output directory, put
+it into single  quotes to avoid the backslashes  interpreted as escape
+chars like this:
+.PP
+.Vb 1
+\&    outdir = \*(AqC:\eData\eAds\*(Aq
+.Ve
+.SH "SETUP"
+.IX Header "SETUP"
+To setup the tool, you need to lookup your userid on
+kleinanzeigen.de. Go to your ad overview page while \s-1NOT\s0 being logged
+in:
+.PP
+.Vb 1
+\&    https://www.kleinanzeigen.de/s\-bestandsliste.html?userId=XXXXXX
+.Ve
+.PP
+The \fB\s-1XXXXX\s0\fR part is your userid.
+.PP
+Put it into the configfile as outlined above. Also specify an output
+directory. Then just execute \f(CW\*(C`kleingebaeck\*(C'\fR.
+.PP
+You can use the \fB\-v\fR option to  get verbose output or \fB\-d\fR to enable
+debugging.
+.SH "BUGS"
+.IX Header "BUGS"
+In order to report a bug, unexpected behavior, feature requests
+or to submit a patch, please open an issue on github:
+<https://github.com/TLINDEN/kleingebaeck/issues>.
+.PP
+Please repeat the failing command with debugging enabled \f(CW\*(C`\-d\*(C'\fR and
+include the output in the issue.
+.SH "LIMITATIONS"
+.IX Header "LIMITATIONS"
+The \f(CW\*(C`kleingebaeck\*(C'\fR doesn't currently check if it has downloaded a
+file already, so it downloads everything again every time you execute
+it. Be aware of it. This will change in the future.
+.PP
+Also there's currently no parallelization implemented. This will
+change in the future.
+.SH "LICENSE"
+.IX Header "LICENSE"
+Licensed under the \s-1GNU GENERAL PUBLIC LICENSE\s0 version 3.
+.SH "Author"
+.IX Header "Author"
+T.v.Dein <tom \s-1AT\s0 vondein \s-1DOT\s0 org>

kleingebaeck.go

@@ -0,0 +1,97 @@
+package main
+
+var manpage = `
+NAME
+    kleingebaeck - kleinanzeigen.de backup tool
+
+SYNOPSYS
+        Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
+        Options:
+        --user    -u <uid>      Backup ads from user with uid <uid>.
+        --debug   -d            Enable debug output.
+        --verbose -v            Enable verbose output.
+        --outdir  -o <dir>      Set output dir (default: current directory)
+        --limit   -l <num>      Limit the ads to download to <num>, default: load all.
+        --config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
+        --manual  -m            Show manual.
+        --help    -h            Show usage.
+
+DESCRIPTION
+    This tool can be used to backup ads on the german ad page
+    <https://kleinanzeigen.de>.
+
+    It downloads all (or only the specified ones) ads of one user into a
+    directory, each ad into its own subdirectory. The backup will contain a
+    textfile Adlisting.txt which contains the ad contents such as title,
+    body, price etc. All images will be downloaded as well.
+
+CONFIGURATION
+    You can create a config file to save typing. By default
+    "~/.kleingebaeck" is being used but you can specify one with "-c" as
+    well. We use TOML as our configuration language. See
+    <https://toml.io/en/>.
+
+    Format is pretty simple:
+
+        user = 1010101
+        loglevel = verbose
+        outdir = "test"
+        template = """
+        Title: {{.Title}}
+        Price: {{.Price}}
+        Id: {{.Id}}
+        Category: {{.Category}}
+        Condition: {{.Condition}}
+        Created: {{.Created}}
+
+        {{.Text}}
+        """
+
+    Be carefull if you want to change the template. The variable is a
+    multiline string surrounded by three double quotes. You can left out
+    certain fields and use any formatting you like. Refer to
+    <https://pkg.go.dev/text/template> for details how to write a template.
+
+    If you're on windows and want to customize the output directory, put it
+    into single quotes to avoid the backslashes interpreted as escape chars
+    like this:
+
+        outdir = 'C:\Data\Ads'
+
+SETUP
+    To setup the tool, you need to lookup your userid on kleinanzeigen.de.
+    Go to your ad overview page while NOT being logged in:
+
+        https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
+
+    The XXXXX part is your userid.
+
+    Put it into the configfile as outlined above. Also specify an output
+    directory. Then just execute "kleingebaeck".
+
+    You can use the -v option to get verbose output or -d to enable
+    debugging.
+
+BUGS
+    In order to report a bug, unexpected behavior, feature requests or to
+    submit a patch, please open an issue on github:
+    <https://github.com/TLINDEN/kleingebaeck/issues>.
+
+    Please repeat the failing command with debugging enabled "-d" and
+    include the output in the issue.
+
+LIMITATIONS
+    The "kleingebaeck" doesn't currently check if it has downloaded a file
+    already, so it downloads everything again every time you execute it. Be
+    aware of it. This will change in the future.
+
+    Also there's currently no parallelization implemented. This will change
+    in the future.
+
+LICENSE
+    Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
+
+Author
+    T.v.Dein <tom AT vondein DOT org>
+
+`

kleingebaeck.pod

@@ -0,0 +1,107 @@
+=head1 NAME
+
+kleingebaeck - kleinanzeigen.de backup tool
+
+=head1 SYNOPSYS
+    
+    Usage: kleingebaeck [-dvVhmoc] [<ad-listing-url>,...]
+    Options:
+    --user    -u <uid>      Backup ads from user with uid <uid>.
+    --debug   -d            Enable debug output.
+    --verbose -v            Enable verbose output.
+    --outdir  -o <dir>      Set output dir (default: current directory)
+    --limit   -l <num>      Limit the ads to download to <num>, default: load all.
+    --config  -c <file>     Use config file <file> (default: ~/.kleingebaeck).
+    --manual  -m            Show manual.
+    --help    -h            Show usage.
+    --version -V            Show program version.
+
+=head1 DESCRIPTION
+
+This tool can be used to backup ads on the german ad page L<https://kleinanzeigen.de>.
+
+It downloads all (or  only the specified ones) ads of  one user into a
+directory, each ad into its own subdirectory. The backup will contain
+a textfile B<Adlisting.txt> which contains the ad contents such as
+title, body, price etc. All images will be downloaded as well.
+
+=head1 CONFIGURATION
+
+You   can  create   a  config   file  to   save  typing.   By  default
+C<~/.kleingebaeck> is being used but you can specify one with C<-c> as
+well.   We    use   TOML   as   our    configuration   language.   See
+L<https://toml.io/en/>.
+
+Format is pretty simple:
+
+    user = 1010101
+    loglevel = verbose
+    outdir = "test"
+    template = """
+    Title: {{.Title}}
+    Price: {{.Price}}
+    Id: {{.Id}}
+    Category: {{.Category}}
+    Condition: {{.Condition}}
+    Created: {{.Created}}
+
+    {{.Text}}
+    """
+
+Be carefull  if you want  to change the  template.  The variable  is a
+multiline string surrounded  by three double quotes. You  can left out
+certain   fields  and   use  any   formatting  you   like.  Refer   to
+L<https://pkg.go.dev/text/template>  for   details  how  to   write  a
+template.
+
+If you're on  windows and want to customize the  output directory, put
+it into single  quotes to avoid the backslashes  interpreted as escape
+chars like this:
+
+    outdir = 'C:\Data\Ads'
+
+=head1 SETUP
+
+To setup the tool, you need to lookup your userid on
+kleinanzeigen.de. Go to your ad overview page while NOT being logged
+in:
+
+    https://www.kleinanzeigen.de/s-bestandsliste.html?userId=XXXXXX
+
+The B<XXXXX> part is your userid.
+
+Put it into the configfile as outlined above. Also specify an output
+directory. Then just execute C<kleingebaeck>.
+
+You can use the B<-v> option to  get verbose output or B<-d> to enable
+debugging.
+
+=head1 BUGS
+
+In order to report a bug, unexpected behavior, feature requests
+or to submit a patch, please open an issue on github:
+L<https://github.com/TLINDEN/kleingebaeck/issues>.
+
+Please repeat the failing command with debugging enabled C<-d> and
+include the output in the issue.
+
+=head1 LIMITATIONS
+
+The C<kleingebaeck> doesn't currently check if it has downloaded a
+file already, so it downloads everything again every time you execute
+it. Be aware of it. This will change in the future.
+
+Also there's currently no parallelization implemented. This will
+change in the future.
+
+=head1 LICENSE
+
+Licensed under the GNU GENERAL PUBLIC LICENSE version 3.
+
+=head1 Author
+
+T.v.Dein <tom AT vondein DOT org>
+
+
+
+=cut

main.go

@@ -0,0 +1,146 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"log/slog"
+	"os"
+	"runtime/debug"
+
+	"github.com/lmittmann/tint"
+)
+
+const LevelNotice = slog.Level(2)
+
+func main() {
+	os.Exit(Main())
+}
+
+func Main() int {
+	logLevel := &slog.LevelVar{}
+	opts := &tint.Options{
+		Level:     logLevel,
+		AddSource: false,
+		ReplaceAttr: func(groups []string, a slog.Attr) slog.Attr {
+			// Remove time from the output
+			if a.Key == slog.TimeKey {
+				return slog.Attr{}
+			}
+			return a
+		},
+		NoColor: IsNoTty(),
+	}
+
+	logLevel.Set(LevelNotice)
+	var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+	logger := slog.New(handler)
+	slog.SetDefault(logger)
+
+	conf, err := InitConfig()
+	if err != nil {
+		return Die(err)
+	}
+
+	if conf.Showversion {
+		fmt.Printf("This is kleingebaeck version %s\n", VERSION)
+		return 0
+	}
+
+	if conf.Showhelp {
+		fmt.Println(Usage)
+		return 0
+	}
+
+	if conf.Showmanual {
+		err := man()
+		if err != nil {
+			return Die(err)
+		}
+		return 0
+	}
+
+	if conf.Verbose {
+		logLevel.Set(slog.LevelInfo)
+	}
+
+	if conf.Debug {
+		// we're using a more verbose logger in debug mode
+		buildInfo, _ := debug.ReadBuildInfo()
+		opts := &tint.Options{
+			Level:     logLevel,
+			AddSource: true,
+			NoColor:   IsNoTty(),
+		}
+
+		logLevel.Set(slog.LevelDebug)
+		var handler slog.Handler = tint.NewHandler(os.Stdout, opts)
+		debuglogger := slog.New(handler).With(
+			slog.Group("program_info",
+				slog.Int("pid", os.Getpid()),
+				slog.String("go_version", buildInfo.GoVersion),
+			),
+		)
+		slog.SetDefault(debuglogger)
+	}
+
+	slog.Debug("config", "conf", conf)
+
+	// prepare output dir
+	err = Mkdir(conf.Outdir)
+	if err != nil {
+		return Die(err)
+	}
+
+	if len(conf.Adlinks) >= 1 {
+		// directly backup ad listing[s]
+		for _, uri := range conf.Adlinks {
+			err := Scrape(conf, uri)
+			if err != nil {
+				return Die(err)
+			}
+		}
+	} else if conf.User > 0 {
+		// backup all ads of the given user (via config or cmdline)
+		err := Start(conf)
+		if err != nil {
+			return Die(err)
+		}
+	} else {
+		return Die(errors.New("invalid or no user id or no ad link specified"))
+	}
+
+	if conf.StatsCountAds > 0 {
+		adstr := "ads"
+		if conf.StatsCountAds == 1 {
+			adstr = "ad"
+		}
+		fmt.Printf("Successfully downloaded %d %s with %d images to %s.\n",
+			conf.StatsCountAds, adstr, conf.StatsCountImages, conf.Outdir)
+	} else {
+		fmt.Printf("No ads found.")
+	}
+
+	return 0
+}
+
+func Die(err error) int {
+	slog.Error("Failure", "error", err.Error())
+	return 1
+}

mkrel.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+
+# Copyright © 2023 Thomas von Dein
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+# get list with: go tool dist list
+DIST="darwin/amd64
+freebsd/amd64
+linux/amd64
+netbsd/amd64
+openbsd/amd64
+windows/amd64"
+
+tool="$1"
+version="$2"
+
+if test -z "$version"; then
+  echo "Usage: $0 <tool name> <release version>"
+  exit 1
+fi
+
+rm -rf releases
+mkdir -p releases
+
+
+for D in $DIST; do
+    os=${D/\/*/}
+    arch=${D/*\//}
+    binfile="releases/${tool}-${os}-${arch}-${version}"
+
+    if test "$os" = "windows"; then
+        binfile="${binfile}.exe"
+    fi
+    
+    tardir="${tool}-${os}-${arch}-${version}"
+    tarfile="releases/${tool}-${os}-${arch}-${version}.tar.gz"
+    set -x
+    GOOS=${os} GOARCH=${arch} go build -tags osusergo,netgo -ldflags "-extldflags=-static" -o ${binfile}
+    mkdir -p ${tardir}
+    cp ${binfile} README.md LICENSE ${tardir}/
+    echo 'tool = kleingebaeck
+PREFIX = /usr/local
+UID    = root
+GID    = 0
+
+install:
+	install -d -o $(UID) -g $(GID) $(PREFIX)/bin
+	install -d -o $(UID) -g $(GID) $(PREFIX)/man/man1
+	install -o $(UID) -g $(GID) -m 555 $(tool)  $(PREFIX)/sbin/
+	install -o $(UID) -g $(GID) -m 444 $(tool).1 $(PREFIX)/man/man1/' > ${tardir}/Makefile
+    tar cpzf ${tarfile} ${tardir}
+    sha256sum ${binfile} | cut -d' ' -f1 > ${binfile}.sha256
+    sha256sum ${tarfile} | cut -d' ' -f1 > ${tarfile}.sha256
+    rm -rf ${tardir}
+    set +x
+done
+

scrape.go

@@ -0,0 +1,226 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"path/filepath"
+	"strings"
+
+	"astuart.co/goq"
+	"golang.org/x/sync/errgroup"
+)
+
+type Index struct {
+	Links []string `goquery:".text-module-begin a,[href]"`
+}
+
+type Ad struct {
+	Title     string `goquery:"h1"`
+	Slug      string
+	Id        string
+	Condition string
+	Category  string
+	Price     string   `goquery:"h2#viewad-price"`
+	Created   string   `goquery:"#viewad-extra-info,text"`
+	Text      string   `goquery:"p#viewad-description-text,html"`
+	Images    []string `goquery:".galleryimage-element img,[src]"`
+	Meta      []string `goquery:".addetailslist--detail--value,text"`
+}
+
+func (ad *Ad) LogValue() slog.Value {
+	return slog.GroupValue(
+		slog.String("title", ad.Title),
+		slog.String("price", ad.Price),
+		slog.String("id", ad.Id),
+		slog.Int("imagecount", len(ad.Images)),
+		slog.Int("bodysize", len(ad.Text)),
+	)
+}
+
+// fetch some web page content
+func Get(uri string, client *http.Client) (io.ReadCloser, error) {
+	req, err := http.NewRequest("GET", uri, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("User-Agent", Useragent)
+
+	res, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+
+	slog.Debug("response", "code", res.StatusCode, "status",
+		res.Status, "size", res.ContentLength)
+
+	return res.Body, nil
+}
+
+// extract links from  all ad listing pages (that  is: use pagination)
+// and scrape every page
+func Start(conf *Config) error {
+	client := &http.Client{}
+	adlinks := []string{}
+
+	baseuri := fmt.Sprintf("%s%s?userId=%d", Baseuri, Listuri, conf.User)
+	page := 1
+	uri := baseuri
+
+	slog.Info("fetching ad pages", "user", conf.User)
+
+	for {
+		var index Index
+		slog.Debug("fetching page", "uri", uri)
+		body, err := Get(uri, client)
+		if err != nil {
+			return err
+		}
+		defer body.Close()
+
+		err = goq.NewDecoder(body).Decode(&index)
+		if err != nil {
+			return err
+		}
+
+		if len(index.Links) == 0 {
+			break
+		}
+
+		slog.Debug("extracted ad links", "count", len(index.Links))
+
+		for _, href := range index.Links {
+			adlinks = append(adlinks, href)
+			slog.Debug("ad link", "href", href)
+		}
+
+		page++
+		uri = baseuri + "&pageNum=" + fmt.Sprintf("%d", page)
+	}
+
+	for i, adlink := range adlinks {
+		err := Scrape(conf, Baseuri+adlink)
+		if err != nil {
+			return err
+		}
+
+		if conf.Limit > 0 && i == conf.Limit-1 {
+			break
+		}
+	}
+
+	return nil
+}
+
+// scrape an ad. uri is the full uri of the ad, dir is the basedir
+func Scrape(c *Config, uri string) error {
+	client := &http.Client{}
+	ad := &Ad{}
+
+	// extract slug and id from uri
+	uriparts := strings.Split(uri, "/")
+	if len(uriparts) < 6 {
+		return errors.New("invalid uri")
+	}
+	ad.Slug = uriparts[4]
+	ad.Id = uriparts[5]
+
+	// get the ad
+	slog.Debug("fetching ad page", "uri", uri)
+	body, err := Get(uri, client)
+	if err != nil {
+		return err
+	}
+	defer body.Close()
+
+	// extract ad contents with goquery/goq
+	err = goq.NewDecoder(body).Decode(&ad)
+	if err != nil {
+		return err
+	}
+	if len(ad.Meta) == 2 {
+		ad.Category = ad.Meta[0]
+		ad.Condition = ad.Meta[1]
+	}
+	slog.Debug("extracted ad listing", "ad", ad)
+
+	// write listing
+	err = WriteAd(c.Outdir, ad, c.Template)
+	if err != nil {
+		return err
+	}
+
+	c.IncrAds()
+
+	return ScrapeImages(c, ad)
+}
+
+func ScrapeImages(c *Config, ad *Ad) error {
+	// fetch images
+	img := 1
+	g := new(errgroup.Group)
+
+	for _, imguri := range ad.Images {
+		imguri := imguri
+		file := filepath.Join(c.Outdir, ad.Slug, fmt.Sprintf("%d.jpg", img))
+		g.Go(func() error {
+			err := Getimage(imguri, file)
+			if err != nil {
+				return err
+			}
+			slog.Info("wrote ad image", "image", file)
+
+			return nil
+		})
+		img++
+	}
+
+	if err := g.Wait(); err != nil {
+		return err
+	}
+
+	c.IncrImgs(len(ad.Images))
+
+	return nil
+}
+
+// fetch an image
+func Getimage(uri, fileName string) error {
+	slog.Debug("fetching ad image", "uri", uri)
+	response, err := http.Get(uri)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode != 200 {
+		return errors.New("received non 200 response code")
+	}
+
+	err = WriteImage(fileName, response.Body)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

store.go

@@ -0,0 +1,78 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"io"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	tpl "text/template"
+)
+
+func WriteAd(dir string, ad *Ad, template string) error {
+	// prepare output dir
+	dir = filepath.Join(dir, ad.Slug)
+	err := Mkdir(dir)
+	if err != nil {
+		return err
+	}
+
+	// write ad file
+	listingfile := filepath.Join(dir, "Adlisting.txt")
+	f, err := os.Create(listingfile)
+	if err != nil {
+		return err
+	}
+
+	if runtime.GOOS == "windows" {
+		ad.Text = strings.ReplaceAll(ad.Text, "<br/>", "\r\n")
+	} else {
+		ad.Text = strings.ReplaceAll(ad.Text, "<br/>", "\n")
+	}
+
+	tmpl, err := tpl.New("adlisting").Parse(template)
+	if err != nil {
+		return err
+	}
+	err = tmpl.Execute(f, ad)
+	if err != nil {
+		return err
+	}
+
+	slog.Info("wrote ad listing", "listingfile", listingfile)
+
+	return nil
+}
+
+func WriteImage(filename string, reader io.ReadCloser) error {
+	file, err := os.Create(filename)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, reader)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

util.go

@@ -0,0 +1,68 @@
+/*
+Copyright © 2023 Thomas von Dein
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package main
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"os/exec"
+	"runtime"
+
+	"github.com/mattn/go-isatty"
+)
+
+func Mkdir(dir string) error {
+	if _, err := os.Stat(dir); errors.Is(err, os.ErrNotExist) {
+		err := os.Mkdir(dir, os.ModePerm)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func man() error {
+	man := exec.Command("less", "-")
+
+	var b bytes.Buffer
+	b.Write([]byte(manpage))
+
+	man.Stdout = os.Stdout
+	man.Stdin = &b
+	man.Stderr = os.Stderr
+
+	err := man.Run()
+
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// returns TRUE if stdout is NOT a tty or windows
+func IsNoTty() bool {
+	if runtime.GOOS == "windows" || !isatty.IsTerminal(os.Stdout.Fd()) {
+		return true
+	}
+
+	// it is a tty
+	return false
+}