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feat(nix-instantiate): add --raw flag

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The experimental `nix eval` command already supports a `--raw` flag.
This commit implements the same flag for the stable nix-instantiate command.

Until now instructions and scripts that didn't want to rely on experimental
features had to use workarounds such as:

    nix-instantiate --eval <something> | tr -d \"

(which also undesirably also removes double quotation marks within the string), or

    nix-instantiate --eval <something> | jq -j

(which undesirably depends on another package).

Co-authored-by: Silvan Mosberger <silvan.mosberger@tweag.io>
This commit is contained in:
Martin Fischer 2024-12-31 14:04:50 +01:00
parent 1a402e0c53
commit 7a8a28629c
5 changed files with 24 additions and 4 deletions
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1
tests/functional/eval.sh
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@ -29,6 +29,7 @@ nix eval --expr 'assert 1 + 2 == 3; true'
nix-instantiate --eval -E 'assert 1 + 2 == 3; true'
[[ $(nix-instantiate -A int --eval "./eval.nix") == 123 ]]
[[ $(nix-instantiate -A str --eval "./eval.nix") == '"foo\nbar"' ]]
[[ $(nix-instantiate -A str --raw --eval "./eval.nix") == $'foo\nbar' ]]
[[ "$(nix-instantiate -A attr --eval "./eval.nix")" == '{ foo = "bar"; }' ]]
[[ $(nix-instantiate -A attr --eval --json "./eval.nix") == '{"foo":"bar"}' ]]
[[ $(nix-instantiate -A int --eval - < "./eval.nix") == 123 ]]