forked from lix-project/lix
add a definition of the nix database to the glossary
Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>
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@ -73,10 +73,9 @@
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- [binary cache]{#gloss-binary-cache}\
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A *binary cache* is a Nix store which uses a different format: its
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metadata and signatures are kept in `.narinfo` files rather than in a
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Nix database. This different format simplifies serving store objects
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over the network, but cannot host builds. Examples of binary caches
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include S3 buckets and the [NixOS binary
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cache](https://cache.nixos.org).
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[Nix database]. This different format simplifies serving store objects
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over the network, but cannot host builds. Examples of binary caches
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include S3 buckets and the [NixOS binary cache](https://cache.nixos.org).
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- [store path]{#gloss-store-path}\
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The location of a [store object] in the file system, i.e., an
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@ -109,7 +108,7 @@
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[fixed-output derivations](#gloss-fixed-output-derivation).
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- [substitute]{#gloss-substitute}\
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A substitute is a command invocation stored in the Nix database that
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A substitute is a command invocation stored in the [Nix database] that
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describes how to build a store object, bypassing the normal build
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mechanism (i.e., derivations). Typically, the substitute builds the
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store object by downloading a pre-built version of the store object
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@ -128,6 +127,14 @@
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builder can rely on external inputs such as the network or the
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system time) but the Nix model assumes it.
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- Nix database{#gloss-nix-database}\
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An SQlite database to track [reference]s between [store object]s.
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This is an implementation detail of the [local store].
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Default location: `/nix/var/nix/db`.
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[Nix database]: #gloss-nix-database
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- [Nix expression]{#gloss-nix-expression}\
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A high-level description of software packages and compositions
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thereof. Deploying software using Nix entails writing Nix
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@ -178,7 +185,7 @@
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For a [local store], this means:
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- The store path leads to an existing [store object] in that [store].
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- The store path is listed in the Nix database as being valid.
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- The store path is listed in the [Nix database] as being valid.
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- All paths in the store path's [closure] are valid.
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[validity]: #gloss-validity
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