nixpkgs/pkgs/build-support/appimage/appimage-exec.sh

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#!@shell@
if [ -n "$DEBUG" ] ; then
set -x
fi
PATH="@path@:$PATH"
apprun_opt=true
#DEBUG=0
# src : AppImage
# dest : let's unpack() create the directory
unpack() {
local src=$1
local out=$2
local appimageSignature=""
local appimageType=0
# https://github.com/AppImage/libappimage/blob/ca8d4b53bed5cbc0f3d0398e30806e0d3adeaaab/src/libappimage/utils/MagicBytesChecker.cpp#L45-L63
eval "$(r2 "$src" -nn -Nqc "p8j 3 @ 8" |
jq -r '{appimageSignature: (.[:-1]|implode), appimageType: .[-1]}|
@sh "appimageSignature=\(.appimageSignature) appimageType=\(.appimageType)"')"
# check AppImage signature
if [[ "$appimageSignature" != "AI" ]]; then
echo "Not an appimage."
exit
fi
case "$appimageType" in
1 ) echo "Uncompress $(basename "$src") of type $appimageType."
mkdir "$out"
pv "$src" | bsdtar -x -C "$out" -f -
;;
2)
# This method avoid issues with non executable appimages,
# non-native packer, packer patching and squashfs-root destination prefix.
# multiarch offset one-liner using same method as AppImage
# see https://gist.github.com/probonopd/a490ba3401b5ef7b881d5e603fa20c93
offset=$(r2 "$src" -nn -Nqc "pfj.elf_header @ 0" |\
jq 'map({(.name): .value}) | add | .shoff + (.shnum * .shentsize)')
echo "Uncompress $(basename "$src") of type $appimageType @ offset $offset."
unsquashfs -q -d "$out" -o "$offset" "$src"
chmod go-w "$out"
;;
# 3) get ready, https://github.com/TheAssassin/type3-runtime
*) echo Unsupported AppImage Type: "$appimageType"
exit
;;
esac
echo "$(basename "$src") is now installed in $out"
}
apprun() {
eval "$(rahash2 "$APPIMAGE" -j | jq -r '.[] | @sh "SHA256=\(.hash)"')"
echo sha256 = \""$SHA256"\"\;
export APPDIR="${XDG_CACHE_HOME:-$HOME/.cache}/appimage-run/$SHA256"
#compatibility
if [ -x "$APPDIR/squashfs-root" ]; then APPDIR="$APPDIR/squashfs-root"; fi
if [ ! -x "$APPDIR" ]; then
mkdir -p "$(dirname "$APPDIR")"
unpack "$APPIMAGE" "$APPDIR"
else echo "$(basename "$APPIMAGE")" installed in "$APPDIR"
fi
export PATH="$PATH:$PWD/usr/bin"
}
wrap() {
cd "$APPDIR" || exit
# quite same in appimageTools
export APPIMAGE_SILENT_INSTALL=1
if [ -n "$APPIMAGE_DEBUG_EXEC" ]; then
exec "$APPIMAGE_DEBUG_EXEC"
fi
exec ./AppRun "$@"
}
usage() {
cat <<EOF
Usage: appimage-run [appimage-run options] <AppImage> [AppImage options]
-h show this message
-d debug mode
-x <directory> : extract appimage in the directory then exit.
-w <directory> : run uncompressed appimage directory (used in appimageTools)
[AppImage options]: Options are passed on to the appimage.
If you want to execute a custom command in the appimage's environment, set the APPIMAGE_DEBUG_EXEC environment variable.
EOF
exit 1
}
while getopts "x:w:dh" option; do
case "${option}" in
d) set -x
;;
x) # eXtract
unpack_opt=true
APPDIR=${OPTARG}
;;
w) # WrapAppImage
export APPDIR=${OPTARG}
wrap_opt=true
;;
h) usage
;;
*)
usage
;;
esac
done
shift $((OPTIND-1))
if [[ $wrap_opt = true ]] && [[ -d "$APPDIR" ]]; then
wrap "$@"
exit
else
APPIMAGE="$(realpath "$1")" || usage
shift
fi
if [[ $unpack_opt = true ]] && [[ -f "$APPIMAGE" ]]; then
unpack "$APPIMAGE" "$APPDIR"
exit
fi
if [[ $apprun_opt = true ]] && [[ -f "$APPIMAGE" ]]; then
apprun
wrap "$@"
exit
fi