Info

• RFC
• PR thread

Steps

Preparatory work

The goal here is to split up the libcmd infrastructure so we are ready to do the store-only Nix.

{command,installables}.{cc,hh} are split apart, and the inheritance hierarchy beneath Installable and Command are refined.

• libcmd hierarchy refactors
  • Scope down --derivation to just the commands that use it #7754
  • Factor out InstallableStorePath to its own file, dedup #7744
  • Keep splitting libcmd headers & files #7748
  • Make --read-only a separate mixin #7755
  • Make command infra less stateful and more regular #7750
  • Move value-only methods to InstallableValue #7757
  • Stratify ExtraPathInfo along Installable hierarchy #7763
• main / entry report refactors
  • Make initLibStore a viable alternative #7732
• Args infra refactors
  • Overhaul completions, redo #6693 #8131

Actual implementation

• Allow building a "store-only" nix #6225