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 "$compext" = ".xz"; then
  38                 echo "ERROR: cannot mix XZ and ZSTD compression"
  39                 exit 1
  40             fi
  41             # shellcheck disable=SC2209
  42             compress="zstd --compress --quiet --stdout"
  43             compext=".zst"
  44             shift
  45             ;;
  46
  47         -*)
  48             if test "$compress" = "cat"; then
  49                 echo "ERROR: unknown command-line option: $1"
  50                 exit 1
  51             fi
  52             compress="$compress $1"
  53             shift
  54             ;;
  55         *)
  56             if test "x$destdir" != "x"; then
  57                 echo "ERROR: unknown command-line options: $*"
  58                 exit 1
  59             fi
  60
  61             destdir="$1"
  62             shift
  63             ;;
  64     esac
  65 done
  66
  67 if [ -z "$destdir" ]; then
  68         echo "ERROR: destination directory was not specified"
  69         exit 1
  70 fi
  71
  72 if ! which rdfind 2>/dev/null >/dev/null; then
  73         echo "ERROR: rdfind is not installed"
  74         exit 1
  75 fi
  76
  77 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
  78 grep -E '^(RawFile|File):' WHENCE | sed -E -e 's/^(RawFile|File): */\1 /;s/"//g' | while read k f; do
  79     test -f "$f" || continue
  80     install -d "$destdir/$(dirname "$f")"
  81     $verbose "copying/compressing file $f$compext"
  82     if test "$compress" != "cat" && test "$k" = "RawFile"; then
  83         $verbose "compression will be skipped for file $f"
  84         cat "$f" > "$destdir/$f"
  85     else
  86         $compress "$f" > "$destdir/$f$compext"
  87     fi
  88 done
  89
  90 $verbose "Finding duplicate files"
  91 rdfind -makesymlinks true -makeresultsfile false "$destdir" >/dev/null
  92 find "$destdir" -type l | while read -r l; do
  93         target="$(realpath "$l")"
  94         $verbose "Correcting path for $l"
  95         ln -fs "$(realpath --relative-to="$(dirname "$(realpath -s "$l")")" "$target")" "$l"
  96 done
  97
  98 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
  99 grep -E '^Link:' WHENCE | sed -e 's/^Link: *//g;s/-> //g' | while read f d; do
 100     if test -L "$f$compext"; then
 101         test -f "$destdir/$f$compext" && continue
 102         $verbose "copying link $f$compext"
 103         install -d "$destdir/$(dirname "$f")"
 104         cp -d "$f$compext" "$destdir/$f$compext"
 105
 106         if test "x$d" != "x"; then
 107             target="$(readlink "$f")"
 108
 109             if test "x$target" != "x$d"; then
 110                 $verbose "WARNING: inconsistent symlink target: $target != $d"
 111             else
 112                 if test "x$prune" != "xyes"; then
 113                     $verbose "WARNING: unneeded symlink detected: $f"
 114                 else
 115                     $verbose "WARNING: pruning unneeded symlink $f"
 116                     rm -f "$f$compext"
 117                 fi
 118             fi
 119         else
 120             $verbose "WARNING: missing target for symlink $f"
 121         fi
 122     else
 123         directory="$destdir/$(dirname "$f")"
 124         install -d "$directory"
 125         target="$(cd "$directory" && realpath -m -s "$d")"
 126         if test -d "$target"; then
 127             $verbose "creating link $f -> $d"
 128             ln -s "$d" "$destdir/$f"
 129         else
 130             $verbose "creating link $f$compext -> $d$compext"
 131             ln -s "$d$compext" "$destdir/$f$compext"
 132         fi
 133     fi
 134 done
 135
 136 exit 0
 137
 138 # vim: et sw=4 sts=4 ts=4