openresty/util/install

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#!/usr/bin/env perl
use strict;
use warnings;
use Getopt::Std qw(getopts);
my %opts;
getopts("dm:", \%opts) or usage();
my $mode = $opts{m};
if ($opts{d}) {
shell("mkdir -p @ARGV");
exit;
}
if (@ARGV < 2) {
usage();
}
my $dst = pop;
my @src = @ARGV;
my $target_dir;
if (@src > 1 || $dst =~ m{/$}) {
$target_dir = $dst;
} elsif (-d $dst) {
$target_dir = $dst;
} elsif ($dst =~ m{(.+)/}) {
$target_dir = $1;
} else {
$target_dir = '.';
}
if (!-d $target_dir) {
shell("mkdir -p $target_dir");
}
shell("cp @src $dst");
if (-f $dst) {
if (defined $mode) {
chmod oct($mode), $dst or
die "failed to change mode of $dst to $mode.\n";
}
exit;
}
for my $src (@src) {
my $name;
if ($src =~ m{/([^/]+)$}) {
$name = $1;
} else {
$name = $src;
}
if (defined $mode) {
my $target = "$target_dir/$name";
chmod oct($mode), $target or
die "failed to change mode of $target to $mode.\n";
}
}
sub usage {
die "Usage: install [-d] [-m <attrs>] <src>... <dst>\n";
}
sub shell {
my $cmd = shift;
system($cmd) == 0 or
die "failed to run command $cmd\n";
}