123 lines
2.6 KiB
Perl
Executable file
123 lines
2.6 KiB
Perl
Executable file
#! @perl@ -w @perlFlags@
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use utf8;
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use strict;
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use warnings;
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use Cwd qw(realpath);
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use Errno;
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use File::Basename qw(dirname);
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use File::Path qw(make_path);
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use File::Spec::Functions qw(catfile);
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use List::Util qw(reduce);
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use IPC::Open3;
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use Nix::Config;
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use Nix::Store qw(derivationFromPath);
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use POSIX qw(uname);
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use Storable qw(lock_retrieve lock_store);
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my ($sysname, undef, $version, undef, $machine) = uname;
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$sysname =~ /Darwin/ or die "This tool is only meant to be used on Darwin systems.";
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my $cache = "$Nix::Config::stateDir/dependency-maps/$machine-$sysname-$version.map";
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make_path dirname($cache);
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our $DEPS;
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eval {
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$DEPS = lock_retrieve($cache);
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};
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if($!{ENOENT}) {
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lock_store {}, $cache;
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$DEPS = {};
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} elsif($@) {
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die "Unable to obtain a lock on dependency-map file $cache: $@";
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}
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sub mkset(@) {
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my %set;
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@set{@_} = ();
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\%set
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}
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sub union($$) {
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my ($set1, $set2) = @_;
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my %new = (%$set1, %$set2);
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\%new
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}
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sub cache_filepath($) {
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my $fp = shift;
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$fp =~ s/-/--/g;
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$fp =~ s/\//-/g;
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$fp =~ s/^-//g;
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catfile $cache, $fp
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}
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sub resolve_tree {
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sub resolve_tree_inner {
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my ($lib, $TREE) = @_;
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return if (defined $TREE->{$lib});
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$TREE->{$lib} = mkset(@{cache_get($lib)});
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foreach my $dep (keys %{$TREE->{$lib}}) {
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resolve_tree_inner($dep, $TREE);
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}
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values %$TREE
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}
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reduce { union($a, $b) } {}, resolve_tree_inner(@_)
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}
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sub cache_get {
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my $key = shift;
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if (defined $DEPS->{$key}) {
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$DEPS->{$key}
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} else {
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cache_insert($key);
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cache_get($key)
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}
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}
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sub cache_insert($) {
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my $key = shift;
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print STDERR "Finding dependencies for $key...\n";
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my @deps = find_deps($key);
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$DEPS->{$key} = \@deps;
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}
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sub find_deps($) {
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my $lib = shift;
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my($chld_in, $chld_out, $chld_err);
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my $pid = open3($chld_in, $chld_out, $chld_err, "@otool@", "-L", "-arch", "x86_64", $lib);
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waitpid($pid, 0);
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my $line = readline $chld_out;
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if($? == 0 and $line !~ /not an object file/) {
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my @libs;
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while(<$chld_out>) {
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my $dep = (split /\s+/)[1];
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push @libs, $dep unless $dep eq $lib or $dep =~ /\@rpath/;
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}
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@libs
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} elsif (-l $lib) {
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(realpath($lib))
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} else {
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()
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}
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}
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if (defined $ARGV[0]) {
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my $deps = derivationFromPath($ARGV[0])->{"env"}->{"__impureHostDeps"};
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if (defined $deps) {
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my @files = split(/\s+/, $deps);
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my $depcache = {};
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my $depset = reduce { union($a, $b) } (map { resolve_tree($_, $depcache) } @files);
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print "extra-chroot-dirs\n";
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print join("\n", keys %$depset);
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print "\n";
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}
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lock_store($DEPS, $cache);
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} else {
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print STDERR "Usage: $0 path/to/derivation.drv\n";
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exit 1
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}
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