mirror of
https://github.com/ilyakooo0/nixpkgs.git
synced 2024-11-05 22:06:00 +03:00
77 lines
3.2 KiB
Markdown
77 lines
3.2 KiB
Markdown
# Nixpkgs lib
|
|
|
|
This directory contains the implementation, documentation and tests for the Nixpkgs `lib` library.
|
|
|
|
## Overview
|
|
|
|
The evaluation entry point for `lib` is [`default.nix`](default.nix).
|
|
This file evaluates to an attribute set containing two separate kinds of attributes:
|
|
- Sub-libraries:
|
|
Attribute sets grouping together similar functionality.
|
|
Each sub-library is defined in a separate file usually matching its attribute name.
|
|
|
|
Example: `lib.lists` is a sub-library containing list-related functionality such as `lib.lists.take` and `lib.lists.imap0`.
|
|
These are defined in the file [`lists.nix`](lists.nix).
|
|
|
|
- Aliases:
|
|
Attributes that point to an attribute of the same name in some sub-library.
|
|
|
|
Example: `lib.take` is an alias for `lib.lists.take`.
|
|
|
|
Most files in this directory are definitions of sub-libraries, but there are a few others:
|
|
- [`minver.nix`](minver.nix): A string of the minimum version of Nix that is required to evaluate Nixpkgs.
|
|
- [`tests`](tests): Tests, see [Running tests](#running-tests)
|
|
- [`release.nix`](tests/release.nix): A derivation aggregating all tests
|
|
- [`misc.nix`](tests/misc.nix): Evaluation unit tests for most sub-libraries
|
|
- `*.sh`: Bash scripts that run tests for specific sub-libraries
|
|
- All other files in this directory exist to support the tests
|
|
- [`systems`](systems): The `lib.systems` sub-library, structured into a directory instead of a file due to its complexity
|
|
- [`path`](path): The `lib.path` sub-library, which includes tests as well as a document describing the design goals of `lib.path`
|
|
- All other files in this directory are sub-libraries
|
|
|
|
### Module system
|
|
|
|
The [module system](https://nixos.org/manual/nixpkgs/#module-system) spans multiple sub-libraries:
|
|
- [`modules.nix`](modules.nix): `lib.modules` for the core functions and anything not relating to option definitions
|
|
- [`options.nix`](options.nix): `lib.options` for anything relating to option definitions
|
|
- [`types.nix`](types.nix): `lib.types` for module system types
|
|
|
|
## Reference documentation
|
|
|
|
Reference documentation for library functions is written above each function as a multi-line comment.
|
|
These comments are processed using [nixdoc](https://github.com/nix-community/nixdoc) and [rendered in the Nixpkgs manual](https://nixos.org/manual/nixpkgs/stable/#chap-functions).
|
|
The nixdoc README describes the [comment format](https://github.com/nix-community/nixdoc#comment-format).
|
|
|
|
See the [chapter on contributing to the Nixpkgs manual](https://nixos.org/manual/nixpkgs/#chap-contributing) for how to build the manual.
|
|
|
|
## Running tests
|
|
|
|
All library tests can be run by building the derivation in [`tests/release.nix`](tests/release.nix):
|
|
|
|
```bash
|
|
nix-build tests/release.nix
|
|
```
|
|
|
|
Some commands for quicker iteration over parts of the test suite are also available:
|
|
|
|
```bash
|
|
# Run all evaluation unit tests in tests/misc.nix
|
|
# if the resulting list is empty, all tests passed
|
|
nix-instantiate --eval --strict tests/misc.nix
|
|
|
|
# Run the module system tests
|
|
tests/modules.sh
|
|
|
|
# Run the lib.sources tests
|
|
tests/sources.sh
|
|
|
|
# Run the lib.filesystem tests
|
|
tests/filesystem.sh
|
|
|
|
# Run the lib.path property tests
|
|
path/tests/prop.sh
|
|
|
|
# Run the lib.fileset tests
|
|
fileset/tests.sh
|
|
```
|