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|
{ pkgs, lib, ... }:
let
inherit (lib) escapeShellArg;
# Encode the store path in base 64 so that the wrapper
# doesn't have a direct dependency on the package.
encoder = "${escapeShellArg "${pkgs.coreutils}/bin/base64"} -w0";
decoder = "${escapeShellArg "${pkgs.coreutils}/bin/base64"} -d";
# The command used to fetch the store path from the binary cache.
fetchSubstitute = "${escapeShellArg "${pkgs.nix}/bin/nix-store"} -r";
mkWrapper = {package, extraErrorMessage ? ""}: pkgs.runCommandLocal "${package.name}-lazy" {
inherit package;
inherit extraErrorMessage;
} ''
encoded="$(echo "$package" | ${encoder})"
if [ ! -e "$package/bin" ]; then
echo "Store path $package doesn't have a \`bin' directory" \
"so we can't create lazy wrappers for it." \
"$extraErrorMessage" >&2
exit 1
fi
for bin in "$package"/bin/*; do
[ -x "$bin" -a ! -d "$bin" ] || continue
binpath="''${bin#$package/}"
mkdir -p "$out/bin"
( echo ${escapeShellArg "#!${pkgs.stdenv.shell}"}
echo "encoded='$encoded'"
echo "binpath='$binpath'"
echo -n ${escapeShellArg ''
storepath="$(echo "$encoded" | ${decoder})"
program="$storepath/$binpath"
if [ ! -e "$storepath" ]; then
${fetchSubstitute} "$storepath" > /dev/null || exit $?
fi
exec "$program" "$@"
''}
) > "$out/bin/$(basename "$bin")"
chmod +x "$out/bin/$(basename "$bin")"
done
'';
in {
inherit
mkWrapper
;
}
|
