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nix-build --run-env: Add a ‘--pure’ flag

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This causes the environment to be (almost) cleared, thus giving a
shell that more closely resembled the actual Nix derivation.
This commit is contained in:
Eelco Dolstra 2013-07-19 11:23:32 +02:00
parent a4921b8ceb
commit dc5f2e7da6
2 changed files with 43 additions and 3 deletions
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17
scripts/nix-build.in
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@ -10,6 +10,7 @@ use File::Temp qw(tempdir);
my $dryRun = 0;
my $verbose = 0;
my $runEnv = 0;
my $pure = 0;
my @instArgs = ();
my @buildArgs = ();
@ -134,6 +135,10 @@ for (my $n = 0; $n < scalar @ARGV; $n++) {
push @envExclude, $ARGV[$n];
}
elsif ($arg eq "--pure") {
$pure = 1;
}
elsif (substr($arg, 0, 1) eq "-") {
push @buildArgs, $arg;
}
@ -169,6 +174,14 @@ foreach my $expr (@exprs) {
or die "$0: failed to build all dependencies\n";
# Set the environment.
if ($pure) {
foreach my $name (keys %ENV) {
next if $name eq "HOME" || $name eq "USER" || $name eq "LOGNAME" || $name eq "DISPLAY" || $name eq "PATH";
delete $ENV{$name};
}
# NixOS hack: prevent /etc/bashrc from sourcing /etc/profile.
$ENV{'__ETC_PROFILE_SOURCED'} = 1;
}
$ENV{'NIX_BUILD_TOP'} = $ENV{'TMPDIR'} || "/tmp";
$ENV{$_} = $drv->{env}->{$_} foreach keys %{$drv->{env}};
@ -180,9 +193,9 @@ foreach my $expr (@exprs) {
writeFile(
$rcfile,
'[ -e ~/.bashrc ] && source ~/.bashrc; ' .
'p=$PATH; ' .
($pure ? '' : 'p=$PATH; ' ).
'[ -e $stdenv/setup ] && source $stdenv/setup; ' .
'PATH=$PATH:$p; ' .
($pure ? '' : 'PATH=$PATH:$p; ') .
'set +e; ' .
'PS1="\n\[\033[1;32m\][nix-build:\w]$\[\033[0m\] "; ' .
$envCommand);