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Workaround to support ruby as an interpreter

This commit is contained in:
Sheena Artrip 2016-04-17 15:05:59 -04:00
parent 0423787086
commit 2989783f64
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1 changed files with 20 additions and 6 deletions
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26
scripts/nix-build.in
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@ -191,17 +191,31 @@ for (my $n = 0; $n < scalar @ARGV; $n++) {
$n++;
die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
my $interpreter = $ARGV[$n];
# Überhack to support Perl. Perl examines the shebang and
# executes it unless it contains the string "perl" or "indir",
# or (undocumented) argv[0] does not contain "perl". Exploit
# the latter by doing "exec -a".
my $execArgs = $interpreter =~ /perl/ ? "-a PERL" : "";
my $execArgs = "";
sub shellEscape {
my $s = $_;
$s =~ s/'/'\\''/g;
return "'" . $s . "'";
}
$envCommand = "exec $execArgs $interpreter $script ${\(join ' ', (map shellEscape, @savedArgs))}";
# Überhack to support Perl. Perl examines the shebang and
# executes it unless it contains the string "perl" or "indir",
# or (undocumented) argv[0] does not contain "perl". Exploit
# the latter by doing "exec -a".
if ($interpreter =~ /perl/) {
$execArgs = "-a PERL";
}
if ($interpreter =~ /ruby/) {
# Hack for Ruby. Ruby also examines the shebang. It tries to
# read the shebang to understand which packages to read from. Since
# this is handled via nix-shell -p, we wrap our ruby script execution
# in ruby -e 'load' which ignores the shebangs.
$envCommand = "exec $execArgs $interpreter -e 'load(\"$script\")' -- ${\(join ' ', (map shellEscape, @savedArgs))}";
} else {
$envCommand = "exec $execArgs $interpreter $script ${\(join ' ', (map shellEscape, @savedArgs))}";
}
}
elsif (substr($arg, 0, 1) eq "-") {