Added args functionality from https://stackoverflow.com/questions/192249/how-do-i-parse-command-line-arguments-in-bash/29754866\#29754866

install.sh

@@ -1,5 +1,22 @@
 #!/bin/bash
 
+set -o errexit -o pipefail -o noclobber -o nounset
+
+! getopt --test > /dev/null
+if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
+    echo "I'm sorry, `getopt --test` failed in this environment."
+    exit 1
+fi
+
+OPTIONS=dtlhus
+LONGOPTS=device,timezone,locale,hostname,username,sudogrp
+
+! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
+if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+    exit 2
+fi
+eval set -- "$PARSED"
+
 device="CHANGEME" # Device that shoud be partitioned e.g. "/dev/sda"
 timezone="CHANGEME" # Your timezone according to /usr/share/zoneinfo/ e.g. "/usr/share/zoneinfo/EUROPE/Berlin"
 locale="CHANGEME" # Your locale according to /etc/locale.gen e.g. "en_US.UTF-8 UTF-8"
@@ -9,6 +26,39 @@ sudogrp="CHANGEME" # Name of the sudogrp
 
 CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 
+while true; do
+    case "$!" in
+        -d|--device)
+            device="$2"
+            shift 2
+            ;;
+        -t|--timezone)
+            timezone="$2"
+            shift 2
+            ;;
+        -l|--locale)
+            locale="$2"
+            shift 2
+            ;;
+        -h|--hostname)
+            hostname="$2"
+            shift 2
+            ;;
+        -u|--username)
+            username="$2"
+            shift 2
+            ;;
+        -s|--sudogrp)
+            sudogrp="$2"
+            shift 2
+            ;;
+        *)
+            echo "Programming error"
+            exit3
+            ;;
+        esac
+    done
+
 # partition 1: 1MiB -> 500MiB FAT32
 # partition 2: 500MiB -> 3GiB swap
 # partition 3: 3GiB -> ..     ext4

root/march-chroot.sh

@@ -1,4 +1,20 @@
 #!/bin/bash
+set -o errexit -o pipefail -o noclobber -o nounset
+
+! getopt --test > /dev/null
+if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
+    echo "I'm sorry, `getopt --test` failed in this environment."
+    exit 1
+fi
+
+OPTIONS=tlhus
+LONGOPTS=timezone,locale,hostname,username,sudogrp
+
+! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
+if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+    exit 2
+fi
+eval set -- "$PARSED"
 
 timezone="CHANGEME" # specified in ./arch-chroot.sh
 locale="CHANGEME" 
@@ -6,7 +22,37 @@ hostname="CHANGEME"
 username="CHANGEME"
 sudogrp="CHANGEME"
 
-arch-chroot /mnt root/march-chroot.sh -t timezone -l locale -h hostname -u username -s sudogrp
+CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+while true; do
+    case "$!" in
+        -t|--timezone)
+            timezone="$2"
+            shift 2
+            ;;
+        -l|--locale)
+            locale="$2"
+            shift 2
+            ;;
+        -h|--hostname)
+            hostname="$2"
+            shift 2
+            ;;
+        -u|--username)
+            username="$2"
+            shift 2
+            ;;
+        -s|--sudogrp)
+            sudogrp="$2"
+            shift 2
+            ;;
+        *)
+            echo "Programming error"
+            exit3
+            ;;
+        esac
+    done
+
 
 ln -sf $timezone /etc/localtime
 

root/march-reboot.sh

@@ -1,7 +1,54 @@
 #!/bin/bash
+set -o errexit -o pipefail -o noclobber -o nounset
+
+! getopt --test > /dev/null
+if [[ ${PIPESTATUS[0]} -ne 4 ]]; then
+    echo "I'm sorry, `getopt --test` failed in this environment."
+    exit 1
+fi
+
+OPTIONS=us
+LONGOPTS=username,sudogrp
+
+! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
+if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+    exit 2
+fi
+eval set -- "$PARSED"
 
-sudogrp="CHANGEME"
 username="CHANGEME"
+sudogrp="CHANGEME"
+
+CWD="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+while true; do
+    case "$!" in
+        -t|--timezone)
+            timezone="$2"
+            shift 2
+            ;;
+        -l|--locale)
+            locale="$2"
+            shift 2
+            ;;
+        -h|--hostname)
+            hostname="$2"
+            shift 2
+            ;;
+        -u|--username)
+            username="$2"
+            shift 2
+            ;;
+        -s|--sudogrp)
+            sudogrp="$2"
+            shift 2
+            ;;
+        *)
+            echo "Programming error"
+            exit3
+            ;;
+        esac
+    done
 
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