Adding linting for initcpio scripts

archiso/initcpio/install/*:
Setting bash shebang for all scripts and making them comform with shellcheck.

archiso/initcpio/{hooks,script}/*:
Setting ash shebang for all scripts and making them comform with shellcheck (for dash, as shellcheck has no ash specific
ruleset). Essentially the ash based scripts should be POSIX compliant as much as possible to have an easier time
writing, debugging and maintaining them.
Ensuring that variables are not treated as options and introducing variable quoting.

.gitlab-ci.yml:
Integrating shellcheck for initcpio scripts.

Closes #32

1 files changed, 30 insertions, 27 deletions

diff --git a/archiso/initcpio/hooks/archiso_pxe_common b/archiso/initcpio/hooks/archiso_pxe_common
index 2380ca3..e31903e 100644
--- a/archiso/initcpio/hooks/archiso_pxe_common
+++ b/archiso/initcpio/hooks/archiso_pxe_common
@@ -1,55 +1,55 @@
-# vim: set ft=sh:
+#!/bin/ash
 
 run_hook () {
     # Do *not* declare 'bootif_dev' local! We need it in run_latehook().
     local i net_mac bootif_mac
+    local DNSDOMAIN HOSTNAME IPV4DNS0 IPV4DNS1 ROOTSERVER
     # These variables will be parsed from /tmp/net-*.conf generated by ipconfig
-    local DEVICE
-    local IPV4ADDR IPV4BROADCAST IPV4NETMASK IPV4GATEWAY IPV4DNS0 IPV4DNS1
-    local HOSTNAME DNSDOMAIN NISDOMAIN ROOTSERVER ROOTPATH
-    local filename
-    # /tmp/net-*.conf
+    # shellcheck disable=SC2034
+    local DEVICE IPV4ADDR IPV4BROADCAST IPV4NETMASK IPV4GATEWAY NISDOMAIN ROOTPATH filename
 
-    if [[ -n "${ip}" ]]; then
-        if [[ -n "${BOOTIF}" ]]; then
-            bootif_mac=${BOOTIF#01-}
-            bootif_mac=${bootif_mac//-/:}
+    if [ -n "${ip}" ]; then
+        if [ -n "${BOOTIF}" ]; then
+            bootif_mac="${BOOTIF#01-}"
+            # shellcheck disable=SC2169 # ash supports bash-like string replacment
+            bootif_mac="${bootif_mac//-/:}"
             for i in /sys/class/net/*/address; do
-                read net_mac < ${i}
-                if [[ "${bootif_mac}" == "${net_mac}" ]]; then
+                read -r net_mac < "${i}"
+                if [ "${bootif_mac}" = "${net_mac}" ]; then
                     bootif_dev=${i#/sys/class/net/}
                     bootif_dev=${bootif_dev%/address}
                     break
                 fi
             done
-	    if [[ "${ip}" == "dhcp" ]]; then
+            if [ "${ip}" = "dhcp" ]; then
                 ip=":::::${bootif_dev}:dhcp"
-	    else
+            else
                 ip="${ip}::${bootif_dev}"
             fi
         fi
 
         # setup network and save some values
         if ! ipconfig -t 20 "ip=${ip}"; then
-                echo "ERROR; Failed to configure network"
-                echo "   Falling back to interactive prompt"
-                echo "   You can try to fix the problem manually, log out when you are finished"
-                launch_interactive_shell
+            echo "ERROR; Failed to configure network"
+            echo "   Falling back to interactive prompt"
+            echo "   You can try to fix the problem manually, log out when you are finished"
+            launch_interactive_shell
         fi
 
+        # shellcheck disable=SC1090 # ipconfig generates these files
         . /tmp/net-*.conf
 
-        pxeserver=${ROOTSERVER}
+        export pxeserver="${ROOTSERVER}"
 
         # setup DNS resolver
-        if [[ "${IPV4DNS0}" != "0.0.0.0" ]]; then
+        if [ "${IPV4DNS0}" != "0.0.0.0" ]; then
             echo "# added by archiso_pxe_common hook" > /etc/resolv.conf
             echo "nameserver ${IPV4DNS0}" >> /etc/resolv.conf
         fi
-        if [[ "${IPV4DNS1}" != "0.0.0.0" ]]; then
+        if [ "${IPV4DNS1}" != "0.0.0.0" ]; then
             echo "nameserver ${IPV4DNS1}" >> /etc/resolv.conf
         fi
-        if [[ -n "${DNSDOMAIN}" ]]; then
+        if [ -n "${DNSDOMAIN}" ]; then
             echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
             echo "domain ${DNSDOMAIN}" >> /etc/resolv.conf
         fi
@@ -57,16 +57,19 @@ run_hook () {
 }
 
 run_latehook () {
-    if [[ -n "${ip}" ]]; then
-        [[ -z "${copy_resolvconf}" ]] && copy_resolvconf="y"
+    if [ -n "${ip}" ]; then
+        [ -z "${copy_resolvconf}" ] && copy_resolvconf="y"
 
-        if [[ "${copytoram}" == "y" ]]; then
-            if [[ -n "${bootif_dev}" ]]; then
+        # shellcheck disable=SC2154 # defined via initcpio's parse_cmdline()
+        if [ "${copytoram}" = "y" ]; then
+            if [ -n "${bootif_dev}" ]; then
                 ip addr flush dev "${bootif_dev}"
                 ip link set "${bootif_dev}" down
             fi
-        elif [[ "${copy_resolvconf}" != "n" && -f /etc/resolv.conf ]]; then
+        elif [ "${copy_resolvconf}" != "n" ] && [ -f /etc/resolv.conf ]; then
             cp /etc/resolv.conf /new_root/etc/resolv.conf
         fi
     fi
 }
+
+# vim: set ft=sh: