copy-firmware.sh

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Copy firmware files based on WHENCE list
   5 #
   6
   7 verbose=:
   8 prune=no
   9 # shellcheck disable=SC2209
  10 compress=cat
  11 compext=
  12
  13 while test $# -gt 0; do
  14     case $1 in
  15         -v | --verbose)
  16             # shellcheck disable=SC2209
  17             verbose=echo
  18             shift
  19             ;;
  20
  21         -P | --prune)
  22             prune=yes
  23             shift
  24             ;;
  25
  26         --xz)
  27             if test "$compext" = ".zst"; then
  28                 echo "ERROR: cannot mix XZ and ZSTD compression"
  29                 exit 1
  30             fi
  31             compress="xz --compress --quiet --stdout --check=crc32"
  32             compext=".xz"
  33             shift
  34             ;;
  35
  36         --zstd)
  37             if test "$compext" = ".xz"; then
  38                 echo "ERROR: cannot mix XZ and ZSTD compression"
  39                 exit 1
  40             fi
  41             # shellcheck disable=SC2209
  42             compress="zstd --compress --quiet --stdout"
  43             compext=".zst"
  44             shift
  45             ;;
  46
  47         *)
  48             if test "x$destdir" != "x"; then
  49                 echo "ERROR: unknown command-line options: $*"
  50                 exit 1
  51             fi
  52
  53             destdir="$1"
  54             shift
  55             ;;
  56     esac
  57 done
  58
  59 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
  60 grep '^File:' WHENCE | sed -e 's/^File: *//g;s/"//g' | while read f; do
  61     test -f "$f" || continue
  62     install -d "$destdir/$(dirname "$f")"
  63     $verbose "copying/compressing file $f$compext"
  64     if test "$compress" != "cat" && grep -q "^Raw: $f\$" WHENCE; then
  65         $verbose "compression will be skipped for file $f"
  66         cat "$f" > "$destdir/$f"
  67     else
  68         $compress "$f" > "$destdir/$f$compext"
  69     fi
  70 done
  71
  72 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
  73 grep -E '^Link:' WHENCE | sed -e 's/^Link: *//g;s/-> //g' | while read f d; do
  74     if test -L "$f$compext"; then
  75         test -f "$destdir/$f$compext" && continue
  76         $verbose "copying link $f$compext"
  77         install -d "$destdir/$(dirname "$f")"
  78         cp -d "$f$compext" "$destdir/$f$compext"
  79
  80         if test "x$d" != "x"; then
  81             target="$(readlink "$f")"
  82
  83             if test "x$target" != "x$d"; then
  84                 $verbose "WARNING: inconsistent symlink target: $target != $d"
  85             else
  86                 if test "x$prune" != "xyes"; then
  87                     $verbose "WARNING: unneeded symlink detected: $f"
  88                 else
  89                     $verbose "WARNING: pruning unneeded symlink $f"
  90                     rm -f "$f$compext"
  91                 fi
  92             fi
  93         else
  94             $verbose "WARNING: missing target for symlink $f"
  95         fi
  96     else
  97         directory="$destdir/$(dirname "$f")"
  98         install -d "$directory"
  99         target="$(cd "$directory" && realpath -m -s "$d")"
 100         if test -d "$target"; then
 101             $verbose "creating link $f -> $d"
 102             ln -s "$d" "$destdir/$f"
 103         else
 104             $verbose "creating link $f$compext -> $d$compext"
 105             ln -s "$d$compext" "$destdir/$f$compext"
 106         fi
 107     fi
 108 done
 109
 110 exit 0
 111
 112 # vim: et sw=4 sts=4 ts=4