Development

This chapter describes how you can modify and extend NixOS.

• Getting the Sources

• Writing NixOS Modules
  • Structure of NixOS Modules
  • NixOS Module for the “locate” Service
    • Option Declarations
    • Extensible Option Types
      • Extensible type placeholder in the service module
      • Extending services.xserver.displayManager.enable in the gdm module
      • Extending services.xserver.displayManager.enable in the sddm module
    • Options Types
    • Basic Types
    • Value Types
    • Composed Types
    • Submodule
      • Directly defined submodule
      • Submodule defined as a reference
      • Declaration of a list of submodules
      • Definition of a list of submodules
      • Declaration of attribute sets of submodules
      • Declaration of attribute sets of submodules
    • Extending types
    • Custom Types
    • Option Definitions
    • Delaying Conditionals
    • Setting Priorities
    • Merging Configurations
    • Warnings and Assertions
    • Warnings
    • Assertions
    • Meta Attributes
    • Importing Modules
    • Replace Modules

• Building Specific Parts of NixOS

• Writing NixOS Documentation
  • Building the Manual
  • Editing DocBook XML
    • Pandoc invocation to convert GitHub-Flavoured MarkDown to DocBook 5 XML
  • Creating a Topic
  • Adding a Topic to the Book

• Building Your Own NixOS CD

• NixOS Tests
  • Writing Tests
    • virtualisation.memorySize
    • virtualisation.vlans
    • virtualisation.writableStore
  • Running Tests
  • Running Tests interactively

• Testing the Installer

• Releases
  • Release process
  • One month before the beta
  • At beta release time
  • During Beta
  • Before the final release
  • At final release time
  • Release Management Team
  • Release schedule