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tests/run.sh: Check that env is mostly unmodified
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@ -27,5 +27,26 @@ nix run --no-write-lock-file .#pkgAsPkg
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! nix run --no-write-lock-file .#pkgAsApp || fail "'nix run' shouldn’t accept an 'app' defined under 'packages'"
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! nix run --no-write-lock-file .#appAsPkg || fail "elements of 'apps' should be of type 'app'"
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# Test that we're not setting any more environment variables than necessary.
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# For instance, we might set an environment variable temporarily to affect some
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# initialization or whatnot, but this must not leak into the environment of the
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# command being run.
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env > $TEST_ROOT/expected-env
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nix run -f shell-hello.nix env > $TEST_ROOT/actual-env
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# Remove/reset variables we expect to be different.
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# - PATH is modified by nix shell
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# - _ is set by bash and is expected to differ because it contains the original command
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# - __CF_USER_TEXT_ENCODING is set by macOS and is beyond our control
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sed -i \
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-e 's/PATH=.*/PATH=.../' \
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-e 's/_=.*/_=.../' \
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-e '/^__CF_USER_TEXT_ENCODING=.*$/d' \
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$TEST_ROOT/expected-env $TEST_ROOT/actual-env
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sort $TEST_ROOT/expected-env | uniq > $TEST_ROOT/expected-env.sorted
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# nix run appears to clear _. I don't understand why. Is this ok?
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echo "_=..." >> $TEST_ROOT/actual-env
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sort $TEST_ROOT/actual-env | uniq > $TEST_ROOT/actual-env.sorted
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diff $TEST_ROOT/expected-env.sorted $TEST_ROOT/actual-env.sorted
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clearStore
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@ -55,4 +55,26 @@ rec {
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chmod +x $out/bin/hello
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'';
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};
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# execs env from PATH, so that we can probe the environment
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# does not allow arguments, because we don't need them
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env = mkDerivation {
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name = "env";
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outputs = [ "out" ];
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buildCommand =
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''
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mkdir -p $out/bin
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cat > $out/bin/env <<EOF
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#! ${shell}
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if [ $# -ne 0 ]; then
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echo "env: Unexpected arguments ($#): $@" 1>&2
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exit 1
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fi
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exec env
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EOF
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chmod +x $out/bin/env
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'';
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};
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}
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