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doc: add type signature of testers.runCommand

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nicoo 2024-08-08 15:43:47 +00:00
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doc/build-helpers/testers.chapter.md
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@ -341,6 +341,8 @@ once to get a derivation hash, and again to produce the final fixed output deriv
## `runCommand` {#tester-runCommand}
`runCommand :: { name, script, stdenv ? stdenvNoCC, hash ? "...", ... } -> Derivation`
This is a wrapper around `pkgs.runCommandWith`, which
- produces a fixed-output derivation, enabling the command(s) to access the network ;
- salts the derivation's name based on its inputs, ensuring the command is re-run whenever the inputs changes.