Ersei Saggi
7928669ef9
This replicates behaviour found in the Nix2 commands, where IN_NIX_SHELL is set. This is for shells to determine whether they are inside of a Nix3 shell, and set a custom prompt accordingly. For example, Fish's Tide prompt framework checks for that environment variable and displays it in the prompt, indicating that the shell is in a Nix environment. This is not new behaviour, and the old Nix2 commands set the variable. If the shell that is created is a "pure" shell, ie --ignore-environment is passed, then IN_NIX_SHELL will be set to "pure". However, "nix develop" will always create an impure environment. Replicated from my Nix PR: https://github.com/NixOS/nix/pull/8885 Change-Id: I695cdc336f76541940a302835124fe7d8f7f39b2 Signed-off-by: Ersei Saggi <vcs@ersei.net>
45 lines
1.5 KiB
Bash
45 lines
1.5 KiB
Bash
source common.sh
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clearStore
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clearCache
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nix shell -f shell-hello.nix hello -c hello | grep 'Hello World'
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nix shell -f shell-hello.nix hello -c hello NixOS | grep 'Hello NixOS'
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# Test output selection.
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nix shell -f shell-hello.nix hello^dev -c hello2 | grep 'Hello2'
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nix shell -f shell-hello.nix 'hello^*' -c hello2 | grep 'Hello2'
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if isDaemonNewer "2.20.0pre20231220"; then
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# Test that command line attribute ordering is reflected in the PATH
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# https://github.com/NixOS/nix/issues/7905
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nix shell -f shell-hello.nix hello salve-mundi -c hello | grep 'Hello World'
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nix shell -f shell-hello.nix salve-mundi hello -c hello | grep 'Salve Mundi'
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fi
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requireSandboxSupport
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chmod -R u+w $TEST_ROOT/store0 || true
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rm -rf $TEST_ROOT/store0
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clearStore
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path=$(nix eval --raw -f shell-hello.nix hello)
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# Note: we need the sandbox paths to ensure that the shell is
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# visible in the sandbox.
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nix shell --sandbox-build-dir /build-tmp \
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--sandbox-paths '/nix? /bin? /lib? /lib64? /usr?' \
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--store $TEST_ROOT/store0 -f shell-hello.nix hello -c hello | grep 'Hello World'
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path2=$(nix shell --sandbox-paths '/nix? /bin? /lib? /lib64? /usr?' --store $TEST_ROOT/store0 -f shell-hello.nix hello -c $SHELL -c 'type -p hello')
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[[ $path/bin/hello = $path2 ]]
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[[ -e $TEST_ROOT/store0/nix/store/$(basename $path)/bin/hello ]]
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# Test whether `nix shell` sets `IN_NIX_SHELL` appropriately
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[[ "$(nix shell -f shell-hello.nix -c sh -c 'echo $IN_NIX_SHELL')" == impure ]]
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[[ "$(nix shell --ignore-environment -f shell-hello.nix -c /bin/sh -c 'echo $IN_NIX_SHELL')" == pure ]]
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