src/build_initramfs.sh

   1 #!/bin/sh
   2
   3 set -e
   4
   5 ROOT="root"
   6 BUILDDIR="build/initramfs"
   7 INIT="../../init-shim-rs/target/x86_64-unknown-linux-gnu/release/init-shim-rs"
   8
   9 echo "Using build dir: $BUILDDIR"
  10 rm -rf "$BUILDDIR"
  11 mkdir -p "$BUILDDIR"
  12 if [ -d pkgs ]; then
  13     echo "copying package cache into build-dir"
  14     cp -a pkgs "$BUILDDIR/pkgs"
  15 fi
  16 cd "$BUILDDIR"
  17 mkdir "$ROOT"
  18
  19 # adds necessary packages to initramfs build root folder
  20 add_pkgs() {
  21     debdir=$2
  22
  23     if [ -z "$NO_DOWNLOAD" ]; then
  24         DEPS=""
  25         for pkg in $1; do
  26             printf " getting reverse dependencies for '%s'" "$pkg"
  27             LOCAL_DEPS=$(apt-rdepends -f Depends -s Depends "$pkg" | grep -v '^ ')
  28             DEPS="$DEPS $LOCAL_DEPS"
  29         done
  30         # debconf and gcc are unnecessary, libboost-regex doesn't install on bullseye
  31         DEPS=$(echo "$DEPS" |\
  32             sed -E 's/debconf(-2\.0)?//g' |\
  33             sed -E 's/libboost-regex//g' |\
  34             sed -E 's/gcc-.{1,2}-base//g')
  35
  36         if [ ! -d "pkgs/$debdir" ]; then
  37             mkdir -p "pkgs/$debdir"
  38         fi
  39
  40         if [ -n "$DEPS" ]; then
  41             (cd "pkgs/$debdir"; apt-get download $DEPS)
  42         fi
  43     fi
  44     if [ -z "$DOWNLOAD_ONLY" ]; then
  45         for deb in pkgs/$debdir/*.deb; do
  46             dpkg-deb -x "$deb" "$ROOT"
  47         done
  48     fi
  49 }
  50
  51 make_cpio() {
  52     echo "creating CPIO archive '$1'"
  53     fakeroot -- sh -c "
  54         cd '$ROOT';
  55         find . -print0 | cpio --null -oV --format=newc -F ../$1
  56     "
  57 }
  58
  59 if [ -z "$DOWNLOAD_ONLY" ]; then
  60     echo "copying init"
  61     cp $INIT "$ROOT/init"
  62     chmod a+x "$ROOT/init" # just to be sure
  63
  64     # tell daemon it's running in the correct environment
  65     touch "$ROOT/restore-vm-marker"
  66 fi
  67
  68 echo "getting base dependencies"
  69
  70 add_pkgs "
  71     busybox:amd64 \
  72     libstdc++6:amd64 \
  73     libssl3:amd64 \
  74     libacl1:amd64 \
  75     libblkid1:amd64 \
  76     libuuid1:amd64 \
  77     zlib1g:amd64 \
  78     libzstd1:amd64 \
  79     liblz4-1:amd64 \
  80     liblzma5:amd64 \
  81     libgcrypt20:amd64 \
  82     libtirpc3:amd64 \
  83     lvm2:amd64 \
  84     thin-provisioning-tools:amd64 \
  85 " 'base'
  86
  87 if [ -z "$DOWNLOAD_ONLY" ]; then
  88
  89     echo "install ZFS tool"
  90     # install custom ZFS tools (built without libudev)
  91     mkdir -p "$ROOT/sbin"
  92     cp -a ../zfstools/sbin/* "$ROOT/sbin/"
  93     cp -a ../zfstools/etc/* "$ROOT/etc/"
  94     cp -a ../zfstools/lib/* "$ROOT/lib/"
  95     cp -a ../zfstools/usr/* "$ROOT/usr/"
  96
  97     echo "cleanup unused data from base dependencies"
  98     rm -rf ${ROOT:?}/usr/share # contains only docs and debian stuff
  99     rm -rf ${ROOT:?}/usr/local/include # header files
 100     rm -rf ${ROOT:?}/usr/local/share # mostly ZFS tests
 101     rm -f ${ROOT:?}/lib/x86_64-linux-gnu/*.a # static libraries
 102
 103     make_cpio "initramfs.img"
 104 fi
 105
 106 echo "getting extra/debug dependencies"
 107
 108 # add debug helpers for debug initramfs, packages from above are included too
 109 add_pkgs "
 110     util-linux:amd64 \
 111     gdb:amd64 \
 112     strace:amd64 \
 113 " 'debug'
 114
 115 if [ -z "$DOWNLOAD_ONLY" ]; then
 116     # leave /usr/share here, it contains necessary stuff for gdb
 117     make_cpio "initramfs-debug.img"
 118 fi