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43 lines
1.6 KiB
Markdown
43 lines
1.6 KiB
Markdown
# Translators
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This document classifies different methods for translating requirement/lock files to the generic lock format and describes how the resulting packages can be integrated into nix builds inside and outside of nixpkgs.
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## pure-nix (preferred)
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Suitable if:
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- the input contains information like URLs and hashes
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- nix supports the hashing algorithm
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- the input can be processed with the nix language directly
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Usage outside of nixpkgs:
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- The input + translator are enough, not requiring any pre-processing.
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Usage inside nixpkgs:
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- The input + translator are enough, not requiring any pre-processing.
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## IFD/recursive (compatible with import from derivation or recursive nix)
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Suitable if:
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- the input contains information like URLs and hashes
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- nix understands the hashing algorithm
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- to process the input, a nix build is required, because for example:
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- the format cannot be parsed with the nix language (yaml etc.)
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- processing the input is too complex and therefore inefficient in nix language
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Usage outside of nixpkgs:
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- The input + translator are enough. The generic lock file is generated via IFD
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Usage inside nixpkgs:
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- generic lock file must be pre-generated using dream2nix cli
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## impure (running outside of nix build)
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Suitable if:
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- the input is missing URLs or hashes
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- the method used to process the input contains impurities, like for example:
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- queries to an online index with varying responses
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- packages must be downloaded to discover important meta data like dependencies.
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Usage outside of nixpkgs:
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- generic lock file must be pre-generated using dream2nix cli
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Usage inside nixpkgs:
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- generic lock file must be pre-generated using dream2nix cli
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