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b13fc7101f
Source filtering is a really cool Nix feature that lets us avoid a lot of rebuilds, which speeds up the iteration cycle a lot in cases where the relevant source files aren't actually modified. We used to have a source filter that marked a few files as irrelevant, but this is the wrong approach, as we have many more files that are irrelevant. We may call this negative filtering. This commit switches the source filtering to positive filtering, which is a lot more robust. Instead of marking which files we don't need we marked the files that we do need. It's a superior approach because it is fail safe. Instead of allowing build performance problems to creep in over time, we require that all source inputs are declared. I shouldn't have to explain that declaring inputs is a good practice, so I'll stop over-explaining here. I do have to acknowledge that this will cause a build failure when the filter is incomplete. This is *good*, because it's the only realistic way we could be reminded of these problems. These events will be infrequent, so the small cost of extending the filter is worth it, compared to the hidden cost of longer dev cycles for things like tests, docker image, etc, etc. (Also rebuilding Nix for stupid unnecessary reasons makes my blood boil) |
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| .github | ||
| config | ||
| contrib | ||
| doc | ||
| m4 | ||
| maintainers | ||
| misc | ||
| mk | ||
| perl | ||
| scripts | ||
| src | ||
| tests | ||
| .dir-locals.el | ||
| .editorconfig | ||
| .gitignore | ||
| .version | ||
| boehmgc-coroutine-sp-fallback.diff | ||
| bootstrap.sh | ||
| configure.ac | ||
| CONTRIBUTING.md | ||
| COPYING | ||
| default.nix | ||
| docker.nix | ||
| flake.lock | ||
| flake.nix | ||
| local.mk | ||
| Makefile | ||
| Makefile.config.in | ||
| precompiled-headers.h | ||
| README.md | ||
| shell.nix | ||
Nix
Nix is a powerful package manager for Linux and other Unix systems that makes package management reliable and reproducible. Please refer to the Nix manual for more details.
Installation
On Linux and macOS the easiest way to install Nix is to run the following shell command (as a user other than root):
$ curl -L https://nixos.org/nix/install | sh
Information on additional installation methods is available on the Nix download page.
Building And Developing
See our Hacking guide in our manual for instruction on how to to set up a development environment and build Nix from source.
Additional Resources
- Nix manual
- Nix jobsets on hydra.nixos.org
- NixOS Discourse
- Matrix - #nix:nixos.org
- IRC - #nixos on libera.chat
License
Nix is released under the LGPL v2.1.