docs(zbm): No idea if IPv6 works (#21)

.gitignore

@@ -0,0 +1 @@
+archzbm_settings.env

README.md

@@ -149,6 +149,8 @@ By default the script configures plain ZFSBootMenu without networking nor an SSH
 
 #### IP address
 
+> IPv6 addresses are untested. Script has been confirmed working with IPv4 addresses.
+
 ```
 ARCHZBM_NET_CLIENT_IP=''
 ARCHZBM_NET_SERVER_IP=''

setup.sh

@@ -19,9 +19,10 @@ exec 3>&1
 declare this_script_url
 this_script_url="${SCRIPT_URL:?}"
 
-declare zpool_name zfs_arch_dataset_name
+declare zpool_name zfs_arch_dataset_name settings_file
 zpool_name='zpool'
 zfs_arch_dataset_name='archlinux'
+settings_file='archzbm_settings.env'
 
 declare -A partition_types
 partition_types[gpt_zfs]='6a85cf4d-1dd2-11b2-99a6-080020736631'
@@ -35,6 +36,226 @@ trap '[ "$?" -ne 77 ] || exit 77' ERR
 
 declare zpool_drive efi_drive boot_drive part_schema
 
+function setup_env_vars () {
+    printf -- '%s\n' \
+        'We will go over a series of questions to create an answer file with' \
+        'options you want the script to use.' \
+        '' \
+        'Current working directory is:'\
+        "$(pwd)" \
+        '' \
+        'After we'"'"'re done answer file will be written to current working dir:' \
+        './'"${settings_file}" \
+        '' \
+        'Press <Ctrl>+C to abort this process. No answer file will' \
+        'be written to ./'"${settings_file}"' if you abort the script.' \
+        '' \
+        'When done rerun the same command you just did without '"'"'setup'"'"' argument.' \
+        ''
+    read -u3 -n 1 -s -r -p "Press any key to begin questionnaire"
+    echo
+    echo '----------------------------------------'
+    echo
+
+    echo "Do you want compressed datasets?"
+    select arg_compressed in "Compressed" "Uncompressed"; do
+        case "${arg_compressed}" in
+            Compressed)
+                break
+                ;;
+            Uncompressed)
+                ARCHZBM_ZFSPROPS_NO_COMPRESSION='true'
+                break
+                ;;
+        esac
+    done <&3 && echo
+
+    echo "Do you want encrypted datasets?"
+    select arg_encrypted in "Encrypted" "Unencrypted"; do
+        case "${arg_encrypted}" in
+            Encrypted)
+                break
+                ;;
+            Unencrypted)
+                ARCHZBM_ZFSPROPS_NO_ENCRYPTION='true'
+                break
+                ;;
+        esac
+    done <&3 && echo
+
+    if [[ "${arg_encrypted}" = 'Encrypted' ]]; then
+        echo "Do you want a custom dataset decryption password?"
+        select arg_custom_dataset_pw in "Yes" "No"; do
+            case "${arg_custom_dataset_pw}" in
+                Yes)
+                    want_custom_dataset_pw='true'
+                    break
+                    ;;
+                No)
+                    break
+                    ;;
+            esac
+        done <&3 && echo
+
+        if [[ "${want_custom_dataset_pw}" ]]; then
+            read -u3 -p 'Please type password, confirm with <Enter>: ' -s ARCHZBM_ZPOOL_PASSWORD
+            echo
+            echo
+        fi
+    fi
+
+    echo "Do you want a custom 'root' user password?"
+    select arg_custom_root_pw in "Yes" "No"; do
+        case "${arg_custom_root_pw}" in
+            Yes)
+                want_custom_root_pw='true'
+                break
+                ;;
+            No)
+                break
+                ;;
+        esac
+    done <&3 && echo
+
+    if [[ "${want_custom_root_pw}" ]]; then
+        read -u3 -p 'Please type password, confirm with <Enter>: ' -s ARCHZBM_ROOT_PASSWORD
+        echo
+        echo
+    fi
+
+    echo "Do you want an SSH daemon in ZFSBootMenu?"
+    select arg_ssh_in_zbm in "Yes" "No"; do
+        case "${arg_ssh_in_zbm}" in
+            Yes)
+                want_ssh_in_zbm='true'
+                break
+                ;;
+            No)
+                break
+                ;;
+        esac
+    done <&3 && echo
+
+    if [[ "${want_ssh_in_zbm}" ]]; then
+        echo "How do you want to assign an IP address in ZFSBootMenu?"
+        select arg_ip_autoconf_method in "Statically" "Dynamically, DHCP" "Dynamically, BOOTP" "Dynamically, RARP"; do
+            case "${arg_ip_autoconf_method}" in
+                'Statically')
+                    ARCHZBM_NET_AUTOCONF='none'
+                    break
+                    ;;
+                'Dynamically, DHCP')
+                    ARCHZBM_NET_AUTOCONF='dhcp'
+                    break
+                    ;;
+                'Dynamically, BOOTP')
+                    ARCHZBM_NET_AUTOCONF='bootp'
+                    break
+                    ;;
+                'Dynamically, RARP')
+                    ARCHZBM_NET_AUTOCONF='rarp'
+                    break
+                    ;;
+            esac
+        done <&3 && echo
+
+        read -u3 -p 'Which device to configure (eth0 is a good guess): ' ARCHZBM_NET_DEVICE
+        echo
+
+        if [[ "${arg_ip_autoconf_method}" = 'Statically' ]]; then
+            read -u3 -p 'Interface IP address: ' ARCHZBM_NET_CLIENT_IP
+            echo
+
+            read -u3 -p 'Netmask: ' ARCHZBM_NET_NETMASK
+            echo
+
+            read -u3 -p 'Gateway IP address: ' ARCHZBM_NET_GATEWAY_IP
+            echo
+        fi
+
+        echo "Do you want a custom SSH listening port?"
+        select arg_custom_ssh_port in "Yes (let me specify)" "No (keep port 22)"; do
+            case "${arg_custom_ssh_port}" in
+                'Yes (let me specify)')
+                    want_custom_ssh_port='true'
+                    break
+                    ;;
+                'No (keep port 22)')
+                    break
+                    ;;
+            esac
+        done <&3 && echo
+
+        if [[ "${want_custom_ssh_port}" ]]; then
+            read -u3 -p 'Please type SSH port, confirm with <Enter>: ' ARCHZBM_SSH_PORT
+            echo
+        fi
+
+        echo "Do you want the SSH daemon to use a custom keepalive send interval?"
+        select arg_custom_ssh_keepalive_intvl in "Yes (let me specify)" "No (keep 1)"; do
+            case "${arg_custom_ssh_keepalive_intvl}" in
+                'Yes (let me specify)')
+                    want_custom_keepalive_intvl='true'
+                    break
+                    ;;
+                'No (keep 1)')
+                    break
+                    ;;
+            esac
+        done <&3 && echo
+
+        if [[ "${want_custom_keepalive_intvl}" ]]; then
+            read -u3 -p 'Please type server keepalive send interval, confirm with <Enter>: ' ARCHZBM_SSH_KEEPALIVE_INTVL
+            echo
+        fi
+
+        if [[ "${want_custom_keepalive_intvl}" ]]; then
+            read -u3 -p 'Please type SSH pub keys on one line separated by double-commas (,,) and confirm with <Enter>: ' ARCHZBM_SSH_AUTH_KEYS
+            echo
+        fi
+    fi
+
+    for env_var in 'ARCHZBM_ZFSPROPS_NO_COMPRESSION' 'ARCHZBM_ZFSPROPS_NO_ENCRYPTION' 'ARCHZBM_ZPOOL_PASSWORD' 'ARCHZBM_ROOT_PASSWORD' 'ARCHZBM_NET_AUTOCONF' 'ARCHZBM_NET_DEVICE' 'ARCHZBM_NET_CLIENT_IP' 'ARCHZBM_NET_NETMASK' 'ARCHZBM_NET_GATEWAY_IP' 'ARCHZBM_SSH_PORT' 'ARCHZBM_SSH_KEEPALIVE_INTVL' 'ARCHZBM_SSH_AUTH_KEYS'; do
+        if [[ "${!env_var}" ]]; then
+            printf -- '%s='"'"'%s'"'"'\n' \
+                "${env_var}" "${!env_var}" \
+                >> "${settings_file}"
+        fi
+    done
+}
+
+function arg_parse () {
+    [[ "${1}" ]] && while :; do
+        case "${1}" in
+            -[[:alnum:]]*)
+                >&3 printf -- '%s\n' \
+                    'Short options '"'${1}'"' detected. Only known option is' \
+                    'literal string '"'"'setup'"'"'. No idea what '"'${1}'"' is.' \
+                    'Exiting ...'
+                    exit 77
+                ;;
+            --*)
+                >&3 printf -- '%s\n' \
+                    'Long-form option '"'${1}'"' detected. Only known option is' \
+                    'literal string '"'"'setup'"'"'. No idea what '"'${1}'"' is.' \
+                    'Exiting ...'
+                    exit 77
+                ;;
+            setup)
+                setup_env_vars
+                return
+                ;;
+            *)
+                >&3 printf -- '%s\n' \
+                    'Argument '"'${1}'"' detected. Only known option is literal' \
+                    'string '"'"'setup'"'"'. No idea what '"'${1}'"' is.' \
+                    'Exiting ...'
+                    exit 77
+                ;;
+            esac
+    done
+}
+
 function we_are_changerooted () {
     if [ "$(stat -c '%d:%i' '/')" != "$(stat -c '%d:%i' '/proc/1/root/.')" ]; then
         return 0
@@ -330,7 +551,6 @@ function load_settings_file () {
     #1.8
     local working_dir settings_file settings_abs
     working_dir="$(pwd)"
-    settings_file='archzbm_settings.env'
     settings_abs="${working_dir}"'/'"${settings_file}"
     if [[ -r "${settings_abs}" ]]; then
         set -a
@@ -1137,6 +1357,9 @@ function finalize_os_setup () {
 }
 
 function main () {
+    if [[ "${#@}" -gt '0' ]]; then
+        arg_parse "${@}"
+    fi
     if we_are_changerooted; then
         install_os_in_chroot                    #2.2
     else
@@ -1164,4 +1387,4 @@ function main () {
     fi
 }
 
-main
+main "${@}"