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author | Alyssa Ross <hi@alyssa.is> | 2022-05-31 09:59:33 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2022-05-31 09:59:57 +0000 |
commit | 9ff36293d1e428cd7bf03e8d4b03611b6d361c28 (patch) | |
tree | 1ab51a42b868c55b83f6ccdb80371b9888739dd9 /nixos/doc/manual/development/building-parts.chapter.md | |
parent | 1c4fcd0d4b0541e674ee56ace1053e23e562cc80 (diff) | |
parent | ddc3c396a51918043bb0faa6f676abd9562be62c (diff) | |
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Last good Nixpkgs for Weston+nouveau? archive
I came this commit hash to terwiz[m] on IRC, who is trying to figure out what the last version of Spectrum that worked on their NUC with Nvidia graphics is.
Diffstat (limited to 'nixos/doc/manual/development/building-parts.chapter.md')
-rw-r--r-- | nixos/doc/manual/development/building-parts.chapter.md | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/nixos/doc/manual/development/building-parts.chapter.md b/nixos/doc/manual/development/building-parts.chapter.md new file mode 100644 index 00000000000..79ddaa37140 --- /dev/null +++ b/nixos/doc/manual/development/building-parts.chapter.md @@ -0,0 +1,74 @@ +# Building Specific Parts of NixOS {#sec-building-parts} + +With the command `nix-build`, you can build specific parts of your NixOS +configuration. This is done as follows: + +```ShellSession +$ cd /path/to/nixpkgs/nixos +$ nix-build -A config.option +``` + +where `option` is a NixOS option with type "derivation" (i.e. something +that can be built). Attributes of interest include: + +`system.build.toplevel` + +: The top-level option that builds the entire NixOS system. Everything + else in your configuration is indirectly pulled in by this option. + This is what `nixos-rebuild` builds and what `/run/current-system` + points to afterwards. + + A shortcut to build this is: + + ```ShellSession + $ nix-build -A system + ``` + +`system.build.manual.manualHTML` + +: The NixOS manual. + +`system.build.etc` + +: A tree of symlinks that form the static parts of `/etc`. + +`system.build.initialRamdisk` , `system.build.kernel` + +: The initial ramdisk and kernel of the system. This allows a quick + way to test whether the kernel and the initial ramdisk boot + correctly, by using QEMU's `-kernel` and `-initrd` options: + + ```ShellSession + $ nix-build -A config.system.build.initialRamdisk -o initrd + $ nix-build -A config.system.build.kernel -o kernel + $ qemu-system-x86_64 -kernel ./kernel/bzImage -initrd ./initrd/initrd -hda /dev/null + ``` + +`system.build.nixos-rebuild` , `system.build.nixos-install` , `system.build.nixos-generate-config` + +: These build the corresponding NixOS commands. + +`systemd.units.unit-name.unit` + +: This builds the unit with the specified name. Note that since unit + names contain dots (e.g. `httpd.service`), you need to put them + between quotes, like this: + + ```ShellSession + $ nix-build -A 'config.systemd.units."httpd.service".unit' + ``` + + You can also test individual units, without rebuilding the whole + system, by putting them in `/run/systemd/system`: + + ```ShellSession + $ cp $(nix-build -A 'config.systemd.units."httpd.service".unit')/httpd.service \ + /run/systemd/system/tmp-httpd.service + # systemctl daemon-reload + # systemctl start tmp-httpd.service + ``` + + Note that the unit must not have the same name as any unit in + `/etc/systemd/system` since those take precedence over + `/run/systemd/system`. That's why the unit is installed as + `tmp-httpd.service` here. |