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nix-prefetch-url: Improve option handling

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This commit is contained in:
Eelco Dolstra 2012-10-23 18:04:00 +02:00
parent 2980d1fba9
commit a28b4445a4
3 changed files with 42 additions and 10 deletions
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23
scripts/nix-prefetch-url.in
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@ -8,11 +8,28 @@ use Nix::Store;
use Nix::Config;
use Nix::Utils;
my $url = shift;
my $expHash = shift;
my $hashType = $ENV{'NIX_HASH_ALGO'} || "sha256";
my $hashType = $ENV{'NIX_HASH_ALGO'} || "sha256"; # obsolete
my $cacheDir = $ENV{'NIX_DOWNLOAD_CACHE'};
my @args;
my $arg;
while ($arg = shift) {
if ($arg eq "--help") {
exec "man nix-prefetch-url" or die;
} elsif ($arg eq "--type") {
$hashType = shift;
die "$0: `$arg' requires an argument\n" unless defined $hashType;
} elsif (substr($arg, 0, 1) eq "-") {
die "$0: unknown flag `$arg'\n";
} else {
push @args, $arg;
}
}
my $url = $args[0];
my $expHash = $args[1];
if (!defined $url || $url eq "") {
print STDERR <<EOF
Usage: nix-prefetch-url URL [EXPECTED-HASH]