forked from lix-project/lix
nix-shell: Set $IN_NIX_SHELL before evaluation
This has some hacky applications.
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@ -175,6 +175,8 @@ foreach my $expr (@exprs) {
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$drvPath = readlink $drvPath or die "cannot read symlink `$drvPath'" if -l $drvPath;
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my $drv = derivationFromPath($drvPath);
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$ENV{'IN_NIX_SHELL'} = 1;
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# Build or fetch all dependencies of the derivation.
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my @inputDrvs = grep { my $x = $_; (grep { $x =~ $_ } @envExclude) == 0 } @{$drv->{inputDrvs}};
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system("$Nix::Config::binDir/nix-store", "-r", "--no-output", @buildArgs, @inputDrvs, @{$drv->{inputSrcs}}) == 0
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@ -193,8 +195,6 @@ foreach my $expr (@exprs) {
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$ENV{'NIX_STORE'} = $Nix::Config::storeDir;
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$ENV{$_} = $drv->{env}->{$_} foreach keys %{$drv->{env}};
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$ENV{'IN_NIX_SHELL'} = 1;
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# Run a shell using the derivation's environment. For
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# convenience, source $stdenv/setup to setup additional
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# environment variables and shell functions. Also don't lose
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