132 lines
3.4 KiB
Perl
Executable file
132 lines
3.4 KiB
Perl
Executable file
#!/usr/bin/env perl
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use strict;
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use warnings qw<all>;
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use Getopt::Std;
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my $gencmd = "# Generated by: " . join(" ", $0, @ARGV) . "\n";
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our $opt_v;
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our $opt_p;
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our $opt_r;
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our $opt_t;
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getopts "v:p:t:r:";
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my $OPAM_RELEASE = $opt_v // "2.0.0";
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my $OPAM_TAG = $opt_t // $OPAM_RELEASE;
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my $OPAM_GITHUB_REPO = $opt_r // "ocaml/opam";
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my $OPAM_RELEASE_URL = "https://github.com/$OPAM_GITHUB_REPO/archive/$OPAM_TAG.zip";
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my $OPAM_RELEASE_SHA256 = `nix-prefetch-url \Q$OPAM_RELEASE_URL\E`;
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chomp $OPAM_RELEASE_SHA256;
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my $OPAM_BASE_URL = "https://raw.githubusercontent.com/$OPAM_GITHUB_REPO/$OPAM_TAG";
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my $OPAM_OPAM = `curl -L --url \Q$OPAM_BASE_URL\E/opam-devel.opam`;
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my($OCAML_MIN_VERSION) = $OPAM_OPAM =~ /^ "ocaml" {>= "(.*)"}$/m
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or die "could not parse ocaml version bound\n";
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print <<"EOF";
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{ stdenv, lib, fetchurl, makeWrapper, getconf,
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ocaml, unzip, ncurses, curl, aspcud, bubblewrap
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}:
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assert lib.versionAtLeast ocaml.version "$OCAML_MIN_VERSION";
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let
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srcs = {
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EOF
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my %urls = ();
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my %md5s = ();
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open(SOURCES, "-|", "curl", "-L", "--url", "$OPAM_BASE_URL/src_ext/Makefile.sources");
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while (<SOURCES>) {
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if (/^URL_(?!PKG_)([-\w]+)\s*=\s*(\S+)$/) {
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$urls{$1} = $2;
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} elsif (/^MD5_(?!PKG_)([-\w]+)\s*=\s*(\S+)$/) {
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$md5s{$1} = $2;
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}
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}
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for my $src (sort keys %urls) {
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my ($sha256,$store_path) = split /\n/, `nix-prefetch-url --print-path \Q$urls{$src}\E`;
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system "echo \Q$md5s{$src}\E' *'\Q$store_path\E | md5sum -c 1>&2";
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die "md5 check failed for $urls{$src}\n" if $?;
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print <<"EOF";
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"$src" = fetchurl {
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url = "$urls{$src}";
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sha256 = "$sha256";
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};
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EOF
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}
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print <<"EOF";
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opam = fetchurl {
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url = "$OPAM_RELEASE_URL";
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sha256 = "$OPAM_RELEASE_SHA256";
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};
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};
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in stdenv.mkDerivation {
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pname = "opam";
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version = "$OPAM_RELEASE";
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nativeBuildInputs = [ makeWrapper unzip ];
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buildInputs = [ curl ncurses ocaml getconf ] ++ lib.optional stdenv.isLinux bubblewrap;
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src = srcs.opam;
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postUnpack = ''
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EOF
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for my $src (sort keys %urls) {
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my($ext) = $urls{$src} =~ /(\.(?:t(?:ar\.|)|)(?:gz|bz2?))$/
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or die "could not find extension for $urls{$src}\n";
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print <<"EOF";
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ln -sv \${srcs."$src"} \$sourceRoot/src_ext/$src$ext
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EOF
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}
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print <<'EOF';
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'';
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EOF
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if (defined $opt_p) {
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print " patches = [ ";
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for my $patch (split /[, ]/, $opt_p) {
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$patch =~ s/^(?=[^\/]*$)/.\//;
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print "$patch ";
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}
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print "];\n\n";
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}
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print <<'EOF';
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preConfigure = ''
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substituteInPlace ./src_ext/Makefile --replace "%.stamp: %.download" "%.stamp:"
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patchShebangs src/state/shellscripts
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'';
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postConfigure = "make lib-ext";
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# Dirty, but apparently ocp-build requires a TERM
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makeFlags = ["TERM=screen"];
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outputs = [ "out" "installer" ];
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setOutputFlags = false;
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# change argv0 to "opam" as a workaround for
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# https://github.com/ocaml/opam/issues/2142
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postInstall = ''
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mv $out/bin/opam $out/bin/.opam-wrapped
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makeWrapper $out/bin/.opam-wrapped $out/bin/opam \
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--argv0 "opam" \
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--suffix PATH : ${aspcud}/bin:${unzip}/bin:${curl}/bin:${lib.optionalString stdenv.isLinux "${bubblewrap}/bin:"}${getconf}/bin \
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--set OPAM_USER_PATH_RO /run/current-system/sw/bin:/nix/
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$out/bin/opam-installer --prefix=$installer opam-installer.install
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'';
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doCheck = false;
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meta = with lib; {
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description = "A package manager for OCaml";
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homepage = "https://opam.ocaml.org/";
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maintainers = [ maintainers.henrytill maintainers.marsam ];
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platforms = platforms.all;
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};
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}
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EOF
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print $gencmd;
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