46 lines
1 KiB
Perl
46 lines
1 KiB
Perl
package Nix::Utils;
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use File::Temp qw(tempdir);
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our @ISA = qw(Exporter);
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our @EXPORT = qw(checkURL uniq writeFile readFile mkTempDir);
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$urlRE = "(?: [a-zA-Z][a-zA-Z0-9\+\-\.]*\:[a-zA-Z0-9\%\/\?\:\@\&\=\+\$\,\-\_\.\!\~\*]+ )";
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sub checkURL {
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my ($url) = @_;
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die "invalid URL ‘$url’\n" unless $url =~ /^ $urlRE $ /x;
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}
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sub uniq {
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my %seen;
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my @res;
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foreach my $name (@_) {
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next if $seen{$name};
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$seen{$name} = 1;
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push @res, $name;
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}
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return @res;
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}
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sub writeFile {
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my ($fn, $s) = @_;
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open TMP, ">$fn" or die "cannot create file `$fn': $!";
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print TMP "$s" or die;
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close TMP or die;
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}
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sub readFile {
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local $/ = undef;
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my ($fn) = @_;
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open TMP, "<$fn" or die "cannot open file `$fn': $!";
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my $s = <TMP>;
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close TMP or die;
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return $s;
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}
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sub mkTempDir {
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my ($name) = @_;
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return tempdir("$name.XXXXXX", CLEANUP => 1, DIR => $ENV{"TMPDIR"} // $ENV{"XDG_RUNTIME_DIR"} // "/tmp")
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or die "cannot create a temporary directory";
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}
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