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 skip_dedup=0
  13
  14 while test $# -gt 0; do
  15     case $1 in
  16         -v | --verbose)
  17             # shellcheck disable=SC2209
  18             verbose=echo
  19             shift
  20             ;;
  21
  22         -P | --prune)
  23             prune=yes
  24             shift
  25             ;;
  26
  27         --xz)
  28             if test "$compext" = ".zst"; then
  29                 echo "ERROR: cannot mix XZ and ZSTD compression"
  30                 exit 1
  31             fi
  32             compress="xz --compress --quiet --stdout --check=crc32"
  33             compext=".xz"
  34             shift
  35             ;;
  36
  37         --zstd)
  38             if test "$compext" = ".xz"; then
  39                 echo "ERROR: cannot mix XZ and ZSTD compression"
  40                 exit 1
  41             fi
  42             # shellcheck disable=SC2209
  43             compress="zstd --compress --quiet --stdout"
  44             compext=".zst"
  45             shift
  46             ;;
  47
  48         --ignore-duplicates)
  49             skip_dedup=1
  50             shift
  51             ;;
  52
  53         -*)
  54             if test "$compress" = "cat"; then
  55                 echo "ERROR: unknown command-line option: $1"
  56                 exit 1
  57             fi
  58             compress="$compress $1"
  59             shift
  60             ;;
  61         *)
  62             if test "x$destdir" != "x"; then
  63                 echo "ERROR: unknown command-line options: $*"
  64                 exit 1
  65             fi
  66
  67             destdir="$1"
  68             shift
  69             ;;
  70     esac
  71 done
  72
  73 if [ -z "$destdir" ]; then
  74         echo "ERROR: destination directory was not specified"
  75         exit 1
  76 fi
  77
  78 if ! command -v rdfind >/dev/null; then
  79         if [ "$skip_dedup" != 1 ]; then
  80                 echo "ERROR: rdfind is not installed.  Pass --ignore-duplicates to skip deduplication"
  81                 exit 1
  82         fi
  83 fi
  84
  85 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
  86 grep -E '^(RawFile|File):' WHENCE | sed -E -e 's/^(RawFile|File): */\1 /;s/"//g' | while read k f; do
  87     test -f "$f" || continue
  88     install -d "$destdir/$(dirname "$f")"
  89     $verbose "copying/compressing file $f$compext"
  90     if test "$compress" != "cat" && test "$k" = "RawFile"; then
  91         $verbose "compression will be skipped for file $f"
  92         cat "$f" > "$destdir/$f"
  93     else
  94         $compress "$f" > "$destdir/$f$compext"
  95     fi
  96 done
  97
  98 if [ "$skip_dedup" != 1 ] ; then
  99         $verbose "Finding duplicate files"
 100         rdfind -makesymlinks true -makeresultsfile false "$destdir" >/dev/null
 101         find "$destdir" -type l | while read -r l; do
 102                 target="$(realpath "$l")"
 103                 $verbose "Correcting path for $l"
 104                 ln -fs "$(realpath --relative-to="$(dirname "$(realpath -s "$l")")" "$target")" "$l"
 105         done
 106 fi
 107
 108 # shellcheck disable=SC2162 # file/folder name can include escaped symbols
 109 grep -E '^Link:' WHENCE | sed -e 's/^Link: *//g;s/-> //g' | while read f d; do
 110     if test -L "$f$compext"; then
 111         test -f "$destdir/$f$compext" && continue
 112         $verbose "copying link $f$compext"
 113         install -d "$destdir/$(dirname "$f")"
 114         cp -d "$f$compext" "$destdir/$f$compext"
 115
 116         if test "x$d" != "x"; then
 117             target="$(readlink "$f")"
 118
 119             if test "x$target" != "x$d"; then
 120                 $verbose "WARNING: inconsistent symlink target: $target != $d"
 121             else
 122                 if test "x$prune" != "xyes"; then
 123                     $verbose "WARNING: unneeded symlink detected: $f"
 124                 else
 125                     $verbose "WARNING: pruning unneeded symlink $f"
 126                     rm -f "$f$compext"
 127                 fi
 128             fi
 129         else
 130             $verbose "WARNING: missing target for symlink $f"
 131         fi
 132     else
 133         directory="$destdir/$(dirname "$f")"
 134         install -d "$directory"
 135         target="$(cd "$directory" && realpath -m -s "$d")"
 136         if test -d "$target"; then
 137             $verbose "creating link $f -> $d"
 138             ln -s "$d" "$destdir/$f"
 139         else
 140             $verbose "creating link $f$compext -> $d$compext"
 141             ln -s "$d$compext" "$destdir/$f$compext"
 142         fi
 143     fi
 144 done
 145
 146 exit 0
 147
 148 # vim: et sw=4 sts=4 ts=4