busybox add initramfs hook

sys/base/busybox/files/busybox.initramfs

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# This hook copies busybox binary into the initramfs directory
+# and creates all necessary links to it.
+# It should be placed last into the hooks directory, in order to
+# not overwrite commands which are provided by other means.
+
+set -e
+
+case "${1:-}" in
+  prereqs)  echo ""; exit 0;;
+esac
+
+BB_BIN=/bin/busybox
+
+[ n = "$BUSYBOX" ] && exit 0
+
+[ -r /usr/share/initramfs-tools/hook-functions ] || exit 0
+. /usr/share/initramfs-tools/hook-functions
+
+if [ -f $DESTDIR/bin/sh ] && cmp -s $DESTDIR/bin/sh $BB_BIN ; then
+  # initramfs copies busybox into /bin/sh, undo this
+  rm -f $DESTDIR/bin/sh
+fi
+rm -f $DESTDIR/bin/busybox	# for compatibility with old initramfs
+copy_exec $BB_BIN /bin/busybox
+
+for alias in $($BB_BIN --list-long); do
+  alias="${alias#/}"
+  case "$alias" in
+    # strip leading /usr, we don't use it
+    usr/*) alias="${alias#usr/}" ;;
+    */*) ;;
+    *) alias="bin/$alias" ;;  # make it into /bin
+  esac
+
+  [ -e "$DESTDIR/$alias" ] || \
+    ln "$DESTDIR/bin/busybox" "$DESTDIR/$alias"
+done

sys/base/busybox/ympbuild

@@ -9,11 +9,12 @@ maintainer='sulincix'
 license=('GPLv3')
 arch=(x86_64)
 source=("https://busybox.net/downloads/busybox-$version.tar.bz2"
-        "busybox.sysconf"
-        
+        "files/busybox.sysconf"
+        "files/busybox.initramfs"
 )
 md5sums=("585949b1dd4292b604b7d199866e9913"
          "SKIP"
+         "SKIP"
 )
 group=(sys.base)
 
@@ -30,8 +31,10 @@ build(){
 }
 
 package(){
-    mkdir -p ${DESTDIR}/bin/ ${DESTDIR}/etc/sysconf.d
+    mkdir -p ${DESTDIR}/bin/ ${DESTDIR}/etc/sysconf.d ${DESTDIR}/usr/share/initramfs-tools/{hooks,conf-hooks.d}/
     install busybox ${DESTDIR}/bin/busybox
     install ../busybox.sysconf ${DESTDIR}/etc/sysconf.d/busybox
+    install ../busybox.initramfs ${DESTDIR}/usr/share/initramfs-tools/hooks/zz-busybox
+    echo "BUSYBOXDIR=/bin" > ${DESTDIR}/usr/share/initramfs-tools/conf-hooks.d/busybox
 }