nixpkgs/nixos/modules/programs/command-not-found/command-not-found.pl
2021-10-04 12:43:39 -07:00

46 lines
1.2 KiB
Perl

#! @perl@/bin/perl -w
use strict;
use DBI;
use DBD::SQLite;
use String::ShellQuote;
use Config;
my $program = $ARGV[0];
my $dbPath = "@dbPath@";
my $dbh = DBI->connect("dbi:SQLite:dbname=$dbPath", "", "")
or die "cannot open database `$dbPath'";
$dbh->{RaiseError} = 0;
$dbh->{PrintError} = 0;
my $system = $ENV{"NIX_SYSTEM"} // $Config{myarchname};
my $res = $dbh->selectall_arrayref(
"select package from Programs where system = ? and name = ?",
{ Slice => {} }, $system, $program);
if (!defined $res || scalar @$res == 0) {
print STDERR "$program: command not found\n";
} elsif (scalar @$res == 1) {
my $package = @$res[0]->{package};
if ($ENV{"NIX_AUTO_RUN"} // "") {
exec("nix-shell", "-p", $package, "--run", shell_quote("exec", @ARGV));
} else {
print STDERR <<EOF;
The program '$program' is not in your PATH. You can make it available in an
ephemeral shell by typing:
nix-shell -p $package
EOF
}
} else {
print STDERR <<EOF;
The program '$program' is not in your PATH. It is provided by several packages.
You can make it available in an ephemeral shell by typing one of the following:
EOF
print STDERR " nix-shell -p $_->{package}\n" foreach @$res;
}
exit 127;