more shellcheck fixes

hooks/luks/luks

@@ -1,4 +1,11 @@
 # vim: set ft=sh:
+# shellcheck shell=sh
+#
+# false positive
+# shellcheck disable=2154
+#
+# word splitting is safe by design
+# shellcheck disable=2086
 #
 # handle_luks()
 {
@@ -18,8 +25,6 @@
     # see https://bugs.archlinux.org/task/56771
     [ -e /lib/libgcc_s.so.1 ] && copy_library /lib/libgcc_s.so.1
 
-    # word splitting is safe by design
-    # shellcheck disable=2086
     IFS=,; set -- $luks_opts; unset IFS
 
     set -C; for opt; do case "${opt%%=*}" in

hooks/luks/luks.init

@@ -1,4 +1,11 @@
 # vim: set ft=sh:
+# shellcheck shell=sh
+#
+# false positive
+# shellcheck disable=2154
+#
+# word splitting is safe by design
+# shellcheck disable=2086,2068
 #
 # unlock_luks()
 {

hooks/lvm/lvm

@@ -1,4 +1,11 @@
 # vim: set ft=sh:
+# shellcheck shell=sh
+#
+# false positive
+# shellcheck disable=2154
+#
+# word splitting is safe by design
+# shellcheck disable=2086
 #
 # handle_lvm()
 {
@@ -26,8 +33,6 @@
             use_lvmetad = 0
         }"
 
-    # word splitting is safe by design
-    # shellcheck disable=2086
     IFS=,; set -- $lvm_opts; unset IFS
 
     for opt; do case "$opt" in

hooks/lvm/lvm.init

@@ -1,4 +1,11 @@
 # vim: set ft=sh:
+# shellcheck shell=sh
+#
+# false positive
+# shellcheck disable=2154
+#
+# word splitting is safe by design
+# shellcheck disable=2086,2068
 #
 # trigger_lvm()
 {
@@ -10,7 +17,7 @@
 
     for opt; do case "$opt" in
         discard=1) lvm_discard="--config=devices{issue_discards=1}" ;;
-        config=0)  : > /etc/lvm/lvm.conf  ;;
+        config=0)  : > /etc/lvm/lvm.conf ;;
         group=*)   lvm_group="${opt#*=}" ;;
         name=*)    lvm_name="/${opt#*=}" ;;
         tag=*)     lvm_tag="@${opt#*=}"  ;;

init

@@ -2,6 +2,8 @@
 #
 # tiny init
 #
+# false positive
+# shellcheck disable=2154
 
 print()
 {
@@ -40,6 +42,8 @@ run_hook()
     type="$1"; hksdir=/usr/share/tinyramfs/hooks
 
     # run hooks if any
+    # false positive
+    # shellcheck disable=1090
     for hook in $hooks; do
         [ -f "${hksdir}/${hook}/${hook}.${type}" ] || continue
            . "${hksdir}/${hook}/${hook}.${type}"
@@ -48,6 +52,8 @@ run_hook()
 
 prepare_environment()
 {
+    # false positive
+    # shellcheck disable=1091
     . /etc/tinyramfs/config
 
     export \
@@ -118,6 +124,8 @@ mount_root()
         "${rorw:--o ro}${root_opts:+,$root_opts}" \
         "${root_type:+-t $root_type}" "$device" "/mnt/root"
 
+    # word splitting is safe by design
+    # shellcheck disable=2068
     mount $@ || panic "failed to mount root"
 }
 
@@ -138,6 +146,8 @@ boot_system()
 
     # POSIX exec has no -c flag to execute command with empty environment
     # use 'env -i' to prevent leaking exported variables
+    # word splitting is safe by design
+    # shellcheck disable=2068
     exec env -i \
         TERM=linux \
         PATH=/bin:/sbin:/usr/bin:/usr/sbin \

tinyramfs

@@ -86,7 +86,7 @@ prepare_environment()
 
     # false positive
     # shellcheck disable=1090
-    . "${config:-/etc/tinyramfs/config}"
+    . "${config:=/etc/tinyramfs/config}"
 
     : "${kernel:=$(uname -r)}"
     : "${moddir:=/lib/modules}"
@@ -96,8 +96,8 @@ prepare_environment()
     mkdir -p "${tmpdir:=${TMPDIR:-/tmp}/tinyramfs.$$}"
 
     # false positive
-    # shellcheck disable=2015,2064
-    [ "$debug" = 1 ] && set -x || trap "rm -rf $tmpdir" EXIT INT
+    # shellcheck disable=2015
+    [ "$debug" = 1 ] && set -x || trap 'rm -rf $tmpdir' EXIT INT
 }
 
 prepare_initramfs()
@@ -150,18 +150,18 @@ copy_binary()
     binary=$(command -v "$1")
 
     # check if binary exist and builtin
+    # false positive
+    # shellcheck disable=2086
     case "$binary" in */*) ;;
         "")
             panic "$1 does not exist"
         ;;
         *)
-            # word splitting is safe by design
-            # shellcheck disable=2086
             IFS=:; set -- $PATH; unset IFS
 
             # assume that `command -v` returned builtin command.
             # this behavior depends on shell implementation.
-            # to be independented we simply iterating over PATH
+            # to be independent we simply iterating over PATH
             # to find external alternative ( e.g kill => /bin/kill )
             for _dir; do
                 [ -x "${_dir}/${binary}" ] || ! continue
@@ -249,25 +249,25 @@ copy_hook()
 {
     hook="$1"
 
+    # false positive
+    # shellcheck disable=1090
     for _dir in "$hksdir" /etc/tinyramfs/hooks /usr/share/tinyramfs/hooks; do
         [ -f "${_dir}/${hook}/${hook}" ] || ! continue
 
         print "running $hook hook"; . "${_dir}/${hook}/${hook}"
 
-        if [ -f "${_dir}/${hook}/${hook}.init" ]; then
-            mkdir -p "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
-            cp "${_dir}/${hook}/${hook}.init" \
-               "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
-        fi
+        for _file in init init.early; do
+            [ -f "${_dir}/${hook}/${hook}.${_file}" ] || continue
 
-        if [ -f "${_dir}/${hook}/${hook}.init.early" ]; then
-            mkdir -p "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
-            cp "${_dir}/${hook}/${hook}.init.early" \
-               "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
-        fi || panic
+            {
+                mkdir -p "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
+                cp "${_dir}/${hook}/${hook}.${_file}" \
+                   "${tmpdir}/usr/share/tinyramfs/hooks/${hook##*/}"
+            } || panic
+        done
 
         break
-    done || panic "could not run $hook"
+    done || panic "could not run $hook hook"
 }
 
 copy_modules()