nix-prefetch-url: Rewrite in C++

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 6effbe208146..000000000000
--- 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'};