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61de9222b0
The fact that we were introducing a conversion from the output of `nix path-info` into the input of `builtins.fetchTree` was the deciding factor. We want scripting outputs into inputs like that to be easy. Since JSON strings and objects are trivially distinguishable, we still have the option of introducing the JSON format as an alternative input scheme in the future, should we want to. (The output format would still be SRI in that case, presumably.)
73 lines
3.2 KiB
Bash
Executable file
73 lines
3.2 KiB
Bash
Executable file
#!/usr/bin/env bash
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source common.sh
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requireDaemonNewerThan "2.8pre20220311"
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TODO_NixOS
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enableFeatures "ca-derivations impure-derivations"
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restartDaemon
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clearStoreIfPossible
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# Basic test of impure derivations: building one a second time should not use the previous result.
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printf 0 > "$TEST_ROOT"/counter
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# `nix derivation add` with impure derivations work
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drvPath=$(nix-instantiate ./impure-derivations.nix -A impure)
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nix derivation show "$drvPath" | jq .[] > "$TEST_HOME"/impure-drv.json
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drvPath2=$(nix derivation add < "$TEST_HOME"/impure-drv.json)
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[[ "$drvPath" = "$drvPath2" ]]
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# But only with the experimental feature!
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expectStderr 1 nix derivation add < "$TEST_HOME"/impure-drv.json --experimental-features nix-command | grepQuiet "experimental Nix feature 'impure-derivations' is disabled"
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nix build --dry-run --json --file ./impure-derivations.nix impure.all
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json=$(nix build -L --no-link --json --file ./impure-derivations.nix impure.all)
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path1=$(echo "$json" | jq -r .[].outputs.out)
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path1_stuff=$(echo "$json" | jq -r .[].outputs.stuff)
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[[ $(< "$path1"/n) = 0 ]]
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[[ $(< "$path1_stuff"/bla) = 0 ]]
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nix path-info --json --json-format 2 "$path1" | jq -e '.info.[].ca | .method == "nar" and (.hash | startswith("sha256-"))'
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path2=$(nix build -L --no-link --json --file ./impure-derivations.nix impure | jq -r .[].outputs.out)
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[[ $(< "$path2"/n) = 1 ]]
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# Test impure derivations that depend on impure derivations.
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path3=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out)
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[[ $(< "$path3"/n) = X2 ]]
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path4=$(nix build -L --no-link --json --file ./impure-derivations.nix impureOnImpure | jq -r .[].outputs.out)
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[[ $(< "$path4"/n) = X3 ]]
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# Test that (self-)references work.
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[[ $(< "$path4"/symlink/bla) = 3 ]]
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[[ $(< "$path4"/self/n) = X3 ]]
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# Input-addressed derivations cannot depend on impure derivations directly.
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(! nix build -L --no-link --json --file ./impure-derivations.nix inputAddressed 2>&1) | grep 'depends on impure derivation'
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drvPath=$(nix eval --json --file ./impure-derivations.nix impure.drvPath | jq -r .)
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[[ $(nix derivation show "$drvPath" | jq ".[\"$(basename "$drvPath")\"].outputs.out.impure") = true ]]
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[[ $(nix derivation show "$drvPath" | jq ".[\"$(basename "$drvPath")\"].outputs.stuff.impure") = true ]]
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# Fixed-output derivations *can* depend on impure derivations.
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path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out)
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[[ $(< "$path5") = X ]]
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[[ $(< "$TEST_ROOT"/counter) = 5 ]]
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# And they should not be rebuilt.
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path5=$(nix build -L --no-link --json --file ./impure-derivations.nix contentAddressed | jq -r .[].outputs.out)
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[[ $(< "$path5") = X ]]
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[[ $(< "$TEST_ROOT"/counter) = 5 ]]
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# Input-addressed derivations can depend on fixed-output derivations that depend on impure derivations.
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path6=$(nix build -L --no-link --json --file ./impure-derivations.nix inputAddressedAfterCA | jq -r .[].outputs.out)
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[[ $(< "$path6") = X ]]
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[[ $(< "$TEST_ROOT"/counter) = 5 ]]
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# Test nix/fetchurl.nix.
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path7=$(nix build -L --no-link --print-out-paths --expr "import <nix/fetchurl.nix> { impure = true; url = file://$PWD/impure-derivations.sh; }")
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cmp "$path7" "$PWD"/impure-derivations.sh
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