install-update: Use Gentoo shell functions

install-update.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 # vim: set sw=4 ts=4 sts=4 et :
 
+. /lib/gentoo/functions.sh
+
 die() {
     rc=$?
     if [ $rc -eq 0 ]; then
@@ -10,23 +12,10 @@ die() {
     exit $rc
 }
 
-error() {
-    printf 'ERROR: '
-    info "$@"
-}
-
 get_partuuid() {
     blkid -o value -s PARTUUID "$1"
 }
 
-info() {
-    if [ $# -eq 1 ]; then
-        echo "$1" >&2
-    elif [ $# -gt 1 ]; then
-        printf "$@" >&2
-    fi
-}
-
 set_default_boot() {
     _rc=0
     mkdir -p newroot || return
@@ -38,53 +27,55 @@ set_default_boot() {
     _kver=${_kernel#vmlinuz-}
     _partuuid=$(get_partuuid "$1")
     _id=id-${_partuuid}-${_kver}
-    printf 'Setting default boot entry to %s\n' "${_id}"
-    grub-editenv /boot/efi/EFI/gentoo/grubenv set "default=${_id}" || rc=$?
+    ebegin 'Setting default boot entry'
+    veindent
+    veinfo "Menu entry ID: ${_id}"
+    veoutdent
+    grub-editenv /boot/efi/EFI/gentoo/grubenv set "default=${_id}" || _rc=$?
+    eend $_rc
     umount newroot
-    return $rc
-}
-
-warn() {
-    printf 'WARNING: '
-    info "$@"
+    return $_rc
 }
 
 write_firmware() {
     _rc=0
     _esp=$(findfs PARTLABEL='EFI System Partition')
     if [ -z "${_esp}" ]; then
-        error 'Could not identify EFI System Partition'
+        eerror 'Could not identify EFI System Partition'
         return 1
     fi
     if ! mountpoint -q /boot/efi; then
         mount -o ro "${_esp}" /boot/efi \
-            || warn 'Failed to mount EFI System Partition'
+            || ewarn 'Failed to mount EFI System Partition'
     fi
     if [ -f /boot/efi/EFI/gentoo/grubenv ]; then
-        info 'Saving current GRUB environment ...'
-        cp /boot/efi/EFI/gentoo/grubenv . \
-            || warn 'Failed to save GRUB environment'
+        ebegin 'Saving current GRUB environment'
+        cp /boot/efi/EFI/gentoo/grubenv .
+        ewend $? 'Failed to save GRUB environment'
     fi
     if mountpoint -q /boot/efi; then
         umount /boot/efi || return
     fi
-    info 'Writing firmware image to EFI System Partition (%s) ...\n' "${_esp}"
+    ebegin "Writing firmware image to EFI System Partition (${_esp})"
     dd if=firmware.img of="${_esp}" bs=1M || _rc=$?
     if [ $_rc -eq 0 ]; then
         mount -orw "${_esp}" /boot/efi || rc=$?
     fi
     if [ $_rc -eq 0 ]; then
         if [ -f grubenv ]; then
-            printf 'Restoring GRUB environment ...\n'
+            ebegin 'Restoring GRUB environment'
             cp grubenv /boot/efi/EFI/gentoo/grubenv || _rc=$?
+            eend $_rc
         fi
     fi
     return $_rc
 }
 
 write_rootfs() {
-    printf 'Writing rootfs image to %s ...\n' "$1"
-    dd if=rootfs.squashfs of="$1" bs=1M
+    _rc=0
+    ebegin "Writing rootfs image to $1"
+    dd if=rootfs.squashfs of="$1" bs=1M || _rc=$?
+    eend $_rc
 }
 
 rc=0
@@ -94,10 +85,10 @@ write_rootfs "${newroot}" || die 'Failed to write new rootfs image to disk'
 write_firmware || die 'Failed to write new firmware image to disk'
 if ! set_default_boot "${newroot}"; then
     rc=$?
-    error 'Failed to set default boot option'
+    eerror 'Failed to set default boot option'
 fi
 
 if [ $rc -eq 0 ]; then
-    info 'Successfully installed update'
+    einfo 'Successfully installed update'
 fi
 exit $rc