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mirror of https://github.com/NixOS/mobile-nixos.git synced 2024-12-16 20:21:32 +03:00
mobile-nixos/overlay/lib/extra-utils.nix

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{
runCommandCC
, nukeReferences
, glibc
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, writeShellScriptBin
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, buildPackages
}:
{
name ? ""
, packages ? []
}:
let
concat = builtins.concatStringsSep "\n";
install_package = set:
let
pkg = if set ? type && set.type == "derivation" then set else set.package;
in
''
for BIN in ${pkg}/{s,}bin/*; do
copy_bin_and_libs $BIN
done
${if set ? extraCommand then set.extraCommand else ""}
'';
install_packages = concat(map (install_package) packages);
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# A utility for enumerating the shared-library dependencies of a program
findLibs = writeShellScriptBin "find-libs" ''
set -euo pipefail
declare -A seen
declare -a left
patchelf="${buildPackages.patchelf}/bin/patchelf"
function add_needed {
rpath="$($patchelf --print-rpath $1)"
dir="$(dirname $1)"
for lib in $($patchelf --print-needed $1); do
left+=("$lib" "$rpath" "$dir")
done
}
add_needed $1
while [ ''${#left[@]} -ne 0 ]; do
next=''${left[0]}
rpath=''${left[1]}
ORIGIN=''${left[2]}
left=("''${left[@]:3}")
if [ -z ''${seen[$next]+x} ]; then
seen[$next]=1
# Ignore the dynamic linker which for some reason appears as a DT_NEEDED of glibc but isn't in glibc's RPATH.
case "$next" in
ld*.so.?) continue;;
esac
IFS=: read -ra paths <<< $rpath
res=
for path in "''${paths[@]}"; do
path=$(eval "echo $path")
if [ -f "$path/$next" ]; then
res="$path/$next"
echo "$res"
add_needed "$res"
break
fi
done
if [ -z "$res" ]; then
echo "Couldn't satisfy dependency $next" >&2
exit 1
fi
fi
done
'';
in
runCommandCC "extra-utils-${name}"
{
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nativeBuildInputs = [ nukeReferences ];
allowedReferences = [ "out" ];
}
''
set +o pipefail
mkdir -p $out/bin $out/lib
ln -s $out/bin $out/sbin
copy_bin_and_libs() {
[ -f "$out/bin/$(basename $1)" ] && rm "$out/bin/$(basename $1)"
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cp -pdv $1 $out/bin
}
${install_packages}
# Copy ld manually since it isn't detected correctly
cp -pv ${glibc.out}/lib/ld*.so.? $out/lib
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# Copy all of the needed libraries
find $out/bin $out/lib -type f | while read BIN; do
echo "Copying libs for executable $BIN"
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for LIB in $(${findLibs}/bin/find-libs $BIN); do
TGT="$out/lib/$(basename $LIB)"
if [ ! -f "$TGT" ]; then
SRC="$(readlink -e $LIB)"
cp -pdv "$SRC" "$TGT"
fi
done
done
# Strip binaries further than normal.
chmod -R u+w $out
stripDirs "$STRIP" "lib bin" "-s"
# Run patchelf to make the programs refer to the copied libraries.
find $out/bin $out/lib -type f | while read i; do
if ! test -L $i; then
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echo "nuking refs from $i..."
nuke-refs -e $out $i
fi
done
find $out/bin -type f | while read i; do
if ! test -L $i; then
echo "patching $i..."
patchelf --set-interpreter $out/lib/ld*.so.? --set-rpath $out/lib $i || true
fi
done
# TODO : make a test-case for this
# # Make sure that the patchelf'ed binaries still work.
# echo "testing patched programs..."
# $out/bin/ash -c 'echo hello world' | grep "hello world"
# export LD_LIBRARY_PATH=$out/lib
# $out/bin/mount --help 2>&1 | grep -q "BusyBox"
''