diff options
Diffstat (limited to 'scripts/nix-prefetch-url.in')
-rwxr-xr-x | scripts/nix-prefetch-url.in | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/scripts/nix-prefetch-url.in b/scripts/nix-prefetch-url.in deleted file mode 100755 index 6effbe208..000000000 --- a/scripts/nix-prefetch-url.in +++ /dev/null @@ -1,132 +0,0 @@ -#! @perl@ -w @perlFlags@ - -use utf8; -use strict; -use File::Basename; -use File::stat; -use Nix::Store; -use Nix::Config; -use Nix::Utils; - -binmode STDERR, ":encoding(utf8)"; - - -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] -EOF - ; - exit 1; -} - -my $tmpDir = mkTempDir("nix-prefetch-url"); - -# Hack to support the mirror:// scheme from Nixpkgs. -if ($url =~ /^mirror:\/\//) { - system("$Nix::Config::binDir/nix-build '<nixpkgs>' -A resolveMirrorURLs --argstr url '$url' -o $tmpDir/urls > /dev/null") == 0 - or die "$0: nix-build failed; maybe \$NIX_PATH is not set properly\n"; - my @expanded = split ' ', readFile("$tmpDir/urls"); - die "$0: cannot resolve ‘$url’" unless scalar @expanded > 0; - print STDERR "$url expands to $expanded[0]\n"; - $url = $expanded[0]; -} - -# Handle escaped characters in the URI. `+', `=' and `?' are the only -# characters that are valid in Nix store path names but have a special -# meaning in URIs. -my $name = basename $url; -die "cannot figure out file name for ‘$url’\n" if $name eq ""; -$name =~ s/%2b/+/g; -$name =~ s/%3d/=/g; -$name =~ s/%3f/?/g; - -my $finalPath; -my $hash; - -# If the hash was given, a file with that hash may already be in the -# store. -if (defined $expHash) { - $finalPath = makeFixedOutputPath(0, $hashType, $expHash, $name); - if (isValidPath($finalPath)) { $hash = $expHash; } else { $finalPath = undef; } -} - -# If we don't know the hash or a file with that hash doesn't exist, -# download the file and add it to the store. -if (!defined $finalPath) { - - my $tmpFile = "$tmpDir/$name"; - - # Optionally do timestamp-based caching of the download. - # Actually, the only thing that we cache in $NIX_DOWNLOAD_CACHE is - # the hash and the timestamp of the file at $url. The caching of - # the file *contents* is done in Nix store, where it can be - # garbage-collected independently. - my ($cachedTimestampFN, $cachedHashFN, @cacheFlags); - if (defined $cacheDir) { - my $urlHash = hashString("sha256", 1, $url); - writeFile "$cacheDir/$urlHash.url", $url; - $cachedHashFN = "$cacheDir/$urlHash.$hashType"; - $cachedTimestampFN = "$cacheDir/$urlHash.stamp"; - @cacheFlags = ("--time-cond", $cachedTimestampFN) if -f $cachedHashFN && -f $cachedTimestampFN; - } - - # Perform the download. - my @curlFlags = ("curl", $url, "-o", $tmpFile, "--fail", "--location", "--max-redirs", "20", "--disable-epsv", "--cookie-jar", "$tmpDir/cookies", "--remote-time", (split " ", ($ENV{NIX_CURL_FLAGS} || ""))); - (system $Nix::Config::curl @curlFlags, @cacheFlags) == 0 or die "$0: download of ‘$url’ failed\n"; - - if (defined $cacheDir && ! -e $tmpFile) { - # Curl didn't create $tmpFile, so apparently there's no newer - # file on the server. - $hash = readFile $cachedHashFN or die; - $finalPath = makeFixedOutputPath(0, $hashType, $hash, $name); - unless (isValidPath $finalPath) { - print STDERR "cached contents of ‘$url’ disappeared, redownloading...\n"; - $finalPath = undef; - (system $Nix::Config::curl @curlFlags) == 0 or die "$0: download of ‘$url’ failed\n"; - } - } - - if (!defined $finalPath) { - - # Compute the hash. - $hash = hashFile($hashType, $hashType ne "md5", $tmpFile); - - if (defined $cacheDir) { - writeFile $cachedHashFN, $hash; - my $st = stat($tmpFile) or die; - open STAMP, ">$cachedTimestampFN" or die; close STAMP; - utime($st->atime, $st->mtime, $cachedTimestampFN) or die; - } - - # Add the downloaded file to the Nix store. - $finalPath = addToStore($tmpFile, 0, $hashType); - } - - die "$0: hash mismatch for ‘$url’\n" if defined $expHash && $expHash ne $hash; -} - -print STDERR "path is ‘$finalPath’\n" unless $ENV{'QUIET'}; -print "$hash\n"; -print "$finalPath\n" if $ENV{'PRINT_PATH'}; |