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appimage: unify extract functions

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This commit is contained in:
Bignaux Ronan 2020-03-04 00:46:00 +01:00
parent ebaedb5377
commit 04037d1e03
1 changed files with 26 additions and 25 deletions
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51
pkgs/build-support/appimage/default.nix
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@ -1,38 +1,39 @@
{ stdenv, libarchive, radare2, jq, buildFHSUserEnv, squashfsTools, writeScript }:
rec {
# Both extraction functions could be unified, but then
# it would depend on libmagic to correctly identify ISO 9660s
extractType1 = { name, src }: stdenv.mkDerivation {
extract = { name, src }: stdenv.mkDerivation {
name = "${name}-extracted";
inherit src;
nativeBuildInputs = [ libarchive ];
nativeBuildInputs = [ radare2 libarchive jq squashfsTools ];
buildCommand = ''
mkdir $out
bsdtar -x -C $out -f $src
# https://github.com/AppImage/libappimage/blob/ca8d4b53bed5cbc0f3d0398e30806e0d3adeaaab/src/libappimage/utils/MagicBytesChecker.cpp#L45-L63
appimageType=$(r2 $src -nn -Nqc "p8 3 @ 8")
case "$appimageType" in
414901)
mkdir $out
bsdtar -x -C $out -f $src;;
414902)
install $src ./appimage
# multiarch offset one-liner using same method as AppImage
# see https://gist.github.com/probonopd/a490ba3401b5ef7b881d5e603fa20c93
offset=$(r2 ./appimage -nn -Nqc "pfj.elf_header @ 0" |\
jq 'map({(.name): .value}) | add | .shoff + (.shnum * .shentsize)')
unsquashfs -o $offset ./appimage
cp -rv squashfs-root $out;;
# 414903) get prepared, https://github.com/TheAssassin/type3-runtime
*) echo "Unsupported AppImage Signature: $appimageType";;
esac
'';
};
extractType2 = { name, src }: stdenv.mkDerivation {
name = "${name}-extracted";
inherit src;
nativeBuildInputs = [ radare2 jq squashfsTools ];
buildCommand = ''
install $src ./appimage
# multiarch offset one-liner using same method as AppImage
# see https://gist.github.com/probonopd/a490ba3401b5ef7b881d5e603fa20c93
offset=$(r2 ./appimage -nn -Nqc "pfj.elf_header @ 0" |\
jq 'map({(.name): .value}) | add | .shoff + (.shnum * .shentsize)')
unsquashfs -o $offset ./appimage
cp -rv squashfs-root $out
'';
};
extractType1 = extract;
extractType2 = extract;
wrapAppImage = args@{ name, src, extraPkgs, ... }: buildFHSUserEnv (defaultFhsEnvArgs // {
inherit name;