rework the script to work as non-root and original ISO is used as argument instead

mint/linux_mint_custom_iso.sh

@@ -1,38 +1,39 @@
 #!/bin/bash
+#you need to download the latest Linux Mint ISO from the website first before running the script.
 
-#the script needs superuser rights to work correctly for now. 
+#adds a variable for correct naming of the created ISO.
-#TO DO: maybe there is a way for the script to work as non-root?
+UNATTENDED="unattended-$1" # => unattended-linuxmint-19.3-cinnamon-64bit.iso
-[[ $UID -ne 0 ]] && exec sudo ./"$0"
 
-#creates some folders that are used during the process. These can be changed, but needed be to changed across the script. 
+#catch if argument 1 is empty. Without the ISO as an argument this script won't work
-mkdir /mnt/iso /opt/mintiso
+if [ -z "$1" ]
 
-#Downloads latest* mint-iso from the fh-aachen mirror. 
+then echo "Usage: $0 [linuxmint-original.iso]"
-#TO DO: Maybe there is a way to use a more generic url here? As it stands now the url has to be changed when a new Linux Mint version is released down the line. Maybe variables are a possibility?
+exit
-wget http://mirror.bauhuette.fh-aachen.de/linuxmint-cd/stable/19.3/linuxmint-19.3-cinnamon-64bit.iso
 
-#mounts the downloaded iso into a folder. * is added as a wildcard for the version number.
+#catch if the file cannot be found or is misspelled.
-mount -o loop linuxmint-*-cinnamon-64bit.iso /mnt/iso
+elif [[ ! -f $1 ]]; then
+echo "File not found: $1" >&2
+exit 1
 
-#the contents of the iso have to be copied over to another folder, since the ISO is mounted read-only. all the steps below require root. 
+else
-cp -rT /mnt/iso/ /opt/mintiso/
+
-cd /opt/mintiso/
+#creates a folders that is used during the process.
+mkdir iso
+
+#copies the iso to the created folder and makes the installed files writable.
+bsdtar -xf $1 -C ./iso
+chmod -R u+w ./iso
 
 #copies the computertruhe.seed from codeberg-repo so always the latest preseed-file is used.
-curl https://codeberg.org/stefan230/Setup-Skripte/raw/branch/master/mint/computertruhe.seed > /opt/mintiso/preseed/computertruhe.seed
+curl https://codeberg.org/Computertruhe/Setup-Skripte/raw/branch/master/mint/computertruhe.seed > ./iso/preseed/linuxmint.seed
-
-#configures the bootloader to use the "custom" computertruhe-preseed. 
-sed -i 's/linuxmint.seed/computertruhe.seed/g' isolinux/isolinux.cfg
 
 #creates the custom-iso with the given parameters.
-#TO DO: the outputpath right now is not generic enough. Maybe find a better name for the iso.  
+mkisofs -D -r -V "UNATTENDED_MINT" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o $UNATTENDED ./iso
-mkisofs -D -r -V "UNATTENDED_MINT" -cache-inodes -J -l -b isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table -o /home/stefan/linuxmint-unattended.iso /opt/mintiso
 
 #umounts the iso and clears up the space we used to create the iso.
-umount /mnt/iso
+rm -rf ./iso
-cd
-rm -r /mnt/iso/
-rm -r /opt/mintiso/
 
 #from here we are basically done and the iso can be "burned" on an USB ready for install.
-echo "Die Custom ISO wurde fertiggestellt und kann nun verwendet werden. Die ISO ist unter /home/stefan/linuxmint-unattended.iso zu finden."
+echo "Die Custom ISO wurde fertiggestellt und kann nun verwendet werden. Die ISO ist unter $UNATTENDED zu finden."
+
+fi