Robert Hensing
9d612c393a
This is an alternative to the IN_NIX_SHELL environment variable, allowing the expression to adapt itself to nix-shell without triggering those adaptations when used as a dependency of another shell. Closes #3147
58 lines
1.2 KiB
Nix
58 lines
1.2 KiB
Nix
{ inNixShell ? false }:
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with import ./config.nix;
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let pkgs = rec {
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setupSh = builtins.toFile "setup" ''
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export VAR_FROM_STDENV_SETUP=foo
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for pkg in $buildInputs; do
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export PATH=$PATH:$pkg/bin
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done
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'';
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stdenv = mkDerivation {
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name = "stdenv";
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buildCommand = ''
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mkdir -p $out
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ln -s ${setupSh} $out/setup
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'';
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};
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shellDrv = mkDerivation {
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name = "shellDrv";
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builder = "/does/not/exist";
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VAR_FROM_NIX = "bar";
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TEST_inNixShell = if inNixShell then "true" else "false";
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inherit stdenv;
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};
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# Used by nix-shell -p
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runCommand = name: args: buildCommand: mkDerivation (args // {
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inherit name buildCommand stdenv;
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});
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foo = runCommand "foo" {} ''
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mkdir -p $out/bin
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echo 'echo foo' > $out/bin/foo
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chmod a+rx $out/bin/foo
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ln -s ${shell} $out/bin/bash
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'';
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bar = runCommand "bar" {} ''
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mkdir -p $out/bin
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echo 'echo bar' > $out/bin/bar
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chmod a+rx $out/bin/bar
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'';
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bash = shell;
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# ruby "interpreter" that outputs "$@"
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ruby = runCommand "ruby" {} ''
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mkdir -p $out/bin
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echo 'printf -- "$*"' > $out/bin/ruby
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chmod a+rx $out/bin/ruby
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'';
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inherit pkgs;
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}; in pkgs
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