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