From 80ebc553eca19dafc64c47420cd49ddd506bc9b7 Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Tue, 9 Aug 2016 06:24:19 -0400
Subject: nix-build: Port to c++

This was a dumb line-for-line rewrite, because nix build/nix run/etc.
will replace it.
---
 scripts/local.mk     |   2 -
 scripts/nix-build.in | 359 ---------------------------------------------------
 2 files changed, 361 deletions(-)
 delete mode 100755 scripts/nix-build.in

(limited to 'scripts')

diff --git a/scripts/local.mk b/scripts/local.mk
index edaf44cc492d..142188ad5f47 100644
--- a/scripts/local.mk
+++ b/scripts/local.mk
@@ -1,5 +1,4 @@
 nix_bin_scripts := \
-  $(d)/nix-build \
   $(d)/nix-channel \
   $(d)/nix-copy-closure \
   $(d)/nix-install-package \
@@ -26,6 +25,5 @@ $(eval $(call install-program-in, $(d)/build-remote.pl, $(libexecdir)/nix))
 ifeq ($(OS), Darwin)
   $(eval $(call install-program-in, $(d)/resolve-system-dependencies.pl, $(libexecdir)/nix))
 endif
-$(eval $(call install-symlink, nix-build, $(bindir)/nix-shell))
 
 clean-files += $(nix_bin_scripts) $(nix_noinst_scripts)
diff --git a/scripts/nix-build.in b/scripts/nix-build.in
deleted file mode 100755
index 2d45e37c52d6..000000000000
--- a/scripts/nix-build.in
+++ /dev/null
@@ -1,359 +0,0 @@
-#! @perl@ -w @perlFlags@
-
-use utf8;
-use strict;
-use Nix::Config;
-use Nix::Store;
-use Nix::Utils;
-use File::Basename;
-use Text::ParseWords;
-use Cwd;
-
-binmode STDERR, ":encoding(utf8)";
-
-my $dryRun = 0;
-my $verbose = 0;
-my $runEnv = $0 =~ /nix-shell$/;
-my $pure = 0;
-my $fromArgs = 0;
-my $packages = 0;
-my $interactive = 1;
-
-my @instArgs = ();
-my @buildArgs = ();
-my @exprs = ();
-
-my $shell = $ENV{SHELL} || "/bin/sh";
-my $envCommand = ""; # interactive shell
-my @envExclude = ();
-
-my $myName = $runEnv ? "nix-shell" : "nix-build";
-
-my $inShebang = 0;
-my $script;
-my @savedArgs;
-
-my $tmpDir = mkTempDir($myName);
-
-my $outLink = "./result";
-my $drvLink = "$tmpDir/derivation";
-
-# Ensure that the $tmpDir is deleted.
-$SIG{'INT'} = sub { exit 1 };
-
-
-# Heuristic to see if we're invoked as a shebang script, namely, if we
-# have a single argument, it's the name of an executable file, and it
-# starts with "#!".
-if ($runEnv && defined $ARGV[0] && $ARGV[0] !~ /nix-shell/) {
-    $script = $ARGV[0];
-    if (-f $script && -x $script) {
-        open SCRIPT, "<$script" or die "$0: cannot open ‘$script’: $!\n";
-        my $first = <SCRIPT>;
-        if ($first =~ /^\#\!/) {
-            $inShebang = 1;
-            @savedArgs = @ARGV; shift @savedArgs;
-            @ARGV = ();
-            while (<SCRIPT>) {
-                chomp;
-                if (/^\#\!\s*nix-shell (.*)$/) {
-                    push @ARGV, shellwords($1);
-                }
-            }
-        }
-        close SCRIPT;
-    }
-}
-
-
-for (my $n = 0; $n < scalar @ARGV; $n++) {
-    my $arg = $ARGV[$n];
-
-    if ($arg eq "--help") {
-        exec "man $myName" or die;
-    }
-
-    elsif ($arg eq "--version") {
-        print "$myName (Nix) $Nix::Config::version\n";
-        exit 0;
-    }
-
-    elsif ($arg eq "--add-drv-link") {
-        $drvLink = "./derivation";
-    }
-
-    elsif ($arg eq "--no-out-link" || $arg eq "--no-link") {
-        $outLink = "$tmpDir/result";
-    }
-
-    elsif ($arg eq "--drv-link") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        $drvLink = $ARGV[$n];
-    }
-
-    elsif ($arg eq "--out-link" || $arg eq "-o") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        $outLink = $ARGV[$n];
-    }
-
-    elsif ($arg eq "--attr" || $arg eq "-A" || $arg eq "-I") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        push @instArgs, ($arg, $ARGV[$n]);
-    }
-
-    elsif ($arg eq "--arg" || $arg eq "--argstr") {
-        die "$0: ‘$arg’ requires two arguments\n" unless $n + 2 < scalar @ARGV;
-        push @instArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
-        $n += 2;
-    }
-
-    elsif ($arg eq "--option") {
-        die "$0: ‘$arg’ requires two arguments\n" unless $n + 2 < scalar @ARGV;
-        push @instArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
-        push @buildArgs, ($arg, $ARGV[$n + 1], $ARGV[$n + 2]);
-        $n += 2;
-    }
-
-    elsif ($arg eq "--max-jobs" || $arg eq "-j" || $arg eq "--max-silent-time" || $arg eq "--cores" || $arg eq "--timeout" || $arg eq '--add-root') {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        push @buildArgs, ($arg, $ARGV[$n]);
-    }
-
-    elsif ($arg eq "--dry-run") {
-        push @buildArgs, "--dry-run";
-        $dryRun = 1;
-    }
-
-    elsif ($arg eq "--show-trace") {
-        push @instArgs, $arg;
-    }
-
-    elsif ($arg eq "-") {
-        @exprs = ("-");
-    }
-
-    elsif ($arg eq "--verbose" || substr($arg, 0, 2) eq "-v") {
-        push @buildArgs, $arg;
-        push @instArgs, $arg;
-        $verbose = 1;
-    }
-
-    elsif ($arg eq "--quiet" || $arg eq "--repair") {
-        push @buildArgs, $arg;
-        push @instArgs, $arg;
-    }
-
-    elsif ($arg eq "--check") {
-        push @buildArgs, $arg;
-    }
-
-    elsif ($arg eq "--run-env") { # obsolete
-        $runEnv = 1;
-    }
-
-    elsif ($arg eq "--command" || $arg eq "--run") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        $envCommand = "$ARGV[$n]\nexit";
-        $interactive = 0 if $arg eq "--run";
-    }
-
-    elsif ($arg eq "--exclude") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        push @envExclude, $ARGV[$n];
-    }
-
-    elsif ($arg eq "--pure") { $pure = 1; }
-    elsif ($arg eq "--impure") { $pure = 0; }
-
-    elsif ($arg eq "--expr" || $arg eq "-E") {
-        $fromArgs = 1;
-        push @instArgs, "--expr";
-    }
-
-    elsif ($arg eq "--packages" || $arg eq "-p") {
-        $packages = 1;
-    }
-
-    elsif ($inShebang && $arg eq "-i") {
-        $n++;
-        die "$0: ‘$arg’ requires an argument\n" unless $n < scalar @ARGV;
-        my $interpreter = $ARGV[$n];
-        my $execArgs = "";
-
-        sub shellEscape {
-            my $s = $_;
-            $s =~ s/'/'\\''/g;
-            return "'" . $s . "'";
-        }
-
-        # Überhack to support Perl. Perl examines the shebang and
-        # executes it unless it contains the string "perl" or "indir",
-        # or (undocumented) argv[0] does not contain "perl". Exploit
-        # the latter by doing "exec -a".
-        if ($interpreter =~ /perl/) {
-            $execArgs = "-a PERL";
-        }
-
-        if ($interpreter =~ /ruby/) {
-            # Hack for Ruby. Ruby also examines the shebang. It tries to
-            # read the shebang to understand which packages to read from. Since
-            # this is handled via nix-shell -p, we wrap our ruby script execution
-            # in ruby -e 'load' which ignores the shebangs.
-            $envCommand = "exec $execArgs $interpreter -e 'load(\"$script\")' -- ${\(join ' ', (map shellEscape, @savedArgs))}";
-        } else {
-            $envCommand = "exec $execArgs $interpreter $script ${\(join ' ', (map shellEscape, @savedArgs))}";
-        }
-    }
-
-    elsif (substr($arg, 0, 1) eq "-") {
-        push @buildArgs, $arg;
-    }
-
-    elsif ($arg eq "-Q" || $arg eq "--no-build-output") {
-        push @buildArgs, $arg;
-        push @instArgs, $arg;
-    }
-
-    else {
-        push @exprs, $arg;
-    }
-}
-
-die "$0: ‘-p’ and ‘-E’ are mutually exclusive\n" if $packages && $fromArgs;
-
-if ($packages) {
-    push @instArgs, "--expr";
-    @exprs = (
-        'with import <nixpkgs> { }; runCommand "shell" { buildInputs = [ '
-        . (join " ", map { "($_)" } @exprs) . ']; } ""');
-} elsif (!$fromArgs) {
-    @exprs = ("shell.nix") if scalar @exprs == 0 && $runEnv && -e "shell.nix";
-    @exprs = ("default.nix") if scalar @exprs == 0;
-}
-
-$ENV{'IN_NIX_SHELL'} = 1 if $runEnv;
-
-
-foreach my $expr (@exprs) {
-
-    # Instantiate.
-    my @drvPaths;
-    if ($expr !~ /^\/.*\.drv$/) {
-        # If we're in a #! script, interpret filenames relative to the
-        # script.
-        $expr = dirname(Cwd::abs_path($script)) . "/" . $expr
-            if $inShebang && !$packages && $expr !~ /^\//;
-
-        # !!! would prefer the perl 5.8.0 pipe open feature here.
-        my $pid = open(DRVPATHS, "-|") || exec "$Nix::Config::binDir/nix-instantiate", "--add-root", $drvLink, "--indirect", @instArgs, $expr;
-        while (<DRVPATHS>) {chomp; push @drvPaths, $_;}
-        if (!close DRVPATHS) {
-            die "nix-instantiate killed by signal " . ($? & 127) . "\n" if ($? & 127);
-            exit 1;
-        }
-    } else {
-        push @drvPaths, $expr;
-    }
-
-    if ($runEnv) {
-        die "$0: a single derivation is required\n" if scalar @drvPaths != 1;
-        my $drvPath = $drvPaths[0];
-        $drvPath = (split '!',$drvPath)[0];
-        $drvPath = readlink $drvPath or die "cannot read symlink ‘$drvPath’" if -l $drvPath;
-        my $drv = derivationFromPath($drvPath);
-
-        # Build or fetch all dependencies of the derivation.
-        my @inputDrvs = grep { my $x = $_; (grep { $x =~ $_ } @envExclude) == 0 } @{$drv->{inputDrvs}};
-        system("$Nix::Config::binDir/nix-store", "-r", "--no-output", "--no-gc-warning", @buildArgs, @inputDrvs, @{$drv->{inputSrcs}}) == 0
-            or die "$0: failed to build all dependencies\n";
-
-        # Set the environment.
-        my $tmp = $ENV{"TMPDIR"} // $ENV{"XDG_RUNTIME_DIR"} // "/tmp";
-        if ($pure) {
-            foreach my $name (keys %ENV) {
-                next if grep { $_ eq $name } ("HOME", "USER", "LOGNAME", "DISPLAY", "PATH", "TERM", "IN_NIX_SHELL", "TZ", "PAGER", "NIX_BUILD_SHELL");
-                delete $ENV{$name};
-            }
-            # NixOS hack: prevent /etc/bashrc from sourcing /etc/profile.
-            $ENV{'__ETC_PROFILE_SOURCED'} = 1;
-        }
-        $ENV{'NIX_BUILD_TOP'} = $ENV{'TMPDIR'} = $ENV{'TEMPDIR'} = $ENV{'TMP'} = $ENV{'TEMP'} = $tmp;
-        $ENV{'NIX_STORE'} = $Nix::Config::storeDir;
-        $ENV{$_} = $drv->{env}->{$_} foreach keys %{$drv->{env}};
-
-        # Run a shell using the derivation's environment.  For
-        # convenience, source $stdenv/setup to setup additional
-        # environment variables and shell functions.  Also don't lose
-        # the current $PATH directories.
-        my $rcfile = "$tmpDir/rc";
-        writeFile(
-            $rcfile,
-            "rm -rf '$tmpDir'; " .
-            'unset BASH_ENV; ' .
-            '[ -n "$PS1" ] && [ -e ~/.bashrc ] && source ~/.bashrc; ' .
-            ($pure ? '' : 'p=$PATH; ' ) .
-            'dontAddDisableDepTrack=1; ' .
-            '[ -e $stdenv/setup ] && source $stdenv/setup; ' .
-            ($pure ? '' : 'PATH=$PATH:$p; unset p; ') .
-            'set +e; ' .
-            '[ -n "$PS1" ] && PS1="\n\[\033[1;32m\][nix-shell:\w]$\[\033[0m\] "; ' .
-            'if [ "$(type -t runHook)" = function ]; then runHook shellHook; fi; ' .
-            'unset NIX_ENFORCE_PURITY; ' .
-            'unset NIX_INDENT_MAKE; ' .
-            'shopt -u nullglob; ' .
-            'unset TZ; ' . (defined $ENV{'TZ'} ? "export TZ='${ENV{'TZ'}}'; " : '') .
-            $envCommand);
-        $ENV{BASH_ENV} = $rcfile;
-        my @args = ($ENV{NIX_BUILD_SHELL} // "bash");
-        push @args, "--rcfile" if $interactive;
-        push @args, $rcfile;
-        exec @args;
-        die;
-    }
-
-    # Ugly hackery to make "nix-build -A foo.all" produce symlinks
-    # ./result, ./result-dev, and so on, rather than ./result,
-    # ./result-2-dev, and so on.  This combines multiple derivation
-    # paths into one "/nix/store/drv-path!out1,out2,..." argument.
-    my $prevDrvPath = "";
-    my @drvPaths2;
-    foreach my $drvPath (@drvPaths) {
-        my $p = $drvPath; my $output = "out";
-        if ($drvPath =~ /(.*)!(.*)/) {
-            $p = $1; $output = $2;
-        } else {
-            $p = $drvPath;
-        }
-        my $target = readlink $p or die "cannot read symlink ‘$p’";
-        print STDERR "derivation is $target\n" if $verbose;
-        if ($target eq $prevDrvPath) {
-            push @drvPaths2, (pop @drvPaths2) . "," . $output;
-        } else {
-            push @drvPaths2, $target . "!" . $output;
-            $prevDrvPath = $target;
-        }
-    }
-
-    # Build.
-    my @outPaths;
-    my $pid = open(OUTPATHS, "-|") || exec "$Nix::Config::binDir/nix-store", "--add-root", $outLink, "--indirect", "-r",
-        @buildArgs, @drvPaths2;
-    while (<OUTPATHS>) {chomp; push @outPaths, $_;}
-    if (!close OUTPATHS) {
-        die "nix-store killed by signal " . ($? & 127) . "\n" if ($? & 127);
-        exit ($? >> 8 || 1);
-    }
-
-    next if $dryRun;
-
-    foreach my $outPath (@outPaths) {
-        my $target = readlink $outPath or die "cannot read symlink ‘$outPath’";
-        print "$target\n";
-    }
-}
-- 
cgit 1.4.1