nix-update

Nix-update updates versions/source hashes of nix packages. It is designed to work with nixpkgs but also other package sets.

Features

• automatically figure out the latest version of packages from:
  • crates.io
  • github.com
  • gitlab.com or other instances that uses fetchFromGitLab
  • pypi
  • rubygems.org
• update buildRustPackage's cargoHash/cargoSha256 and cargoSetupHook's cargoDeps
• update buildGoModule's vendorHash/vendorSha256
• update buildNpmPackage's npmDepsHash and npmConfigHook's npmDeps
• update flake outputs (see --flake)
• build and run the resulting package (see --build, --run or --shell
• commit updated files (see --commit flag)
• run update scripts (passthru.updateScript, see --use-update-script flag)
• run package tests (see --test flag)

Installation

nix-update is included in nixpkgs (unstable channel, right now) or NUR (nur.repos.mic92.nix-update).

To use it run without installing it, use:

$ nix-shell -p nix-update

To install it:

$ nix-env -f '<nixpkgs>' -iA nix-update

To run it from the git repository:

$ nix-build
$ ./result/bin/nix-update

If you have nix flakes enabled you can also do:

$ nix run github:Mic92/nix-update

Note that this asserts formatting with the latest version of black, so you may need to specify a more up to date version of NixPkgs:

$ nix-build -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixpkgs-unstable.tar.gz
$ ./result/bin/nix-update

USAGE

First change to your directory containing the nix expression (Could be a nixpkgs or your own repository). Than run nix-update as follows

$ nix-update attribute [--version version]

If your package is defined in a flake use the --flake flag instead:

$ nix-update attribute --flake [--version version]

nix-update will than try to update either the packages.{currentSystem}.{attribute} or {attribute} output attribute of the given flake.

This example will fetch the latest github release:

$ nix-update nixpkgs-review

It is also possible to specify the version manually

$ nix-update --version=2.1.1 nixpkgs-review

To only update sources hashes without updating the version:

$ nix-update --version=skip nixpkgs-review

Setting --version to branch instead, will look for the latest commit.

To extract version information from versions with prefixes or suffixes, a regex can be used

$ nix-update jq --version-regex 'jq-(.*)'

By default nix-update will locate the file that needs to be patched using the src attribute of a derivation. In some cases this heurestic is wrong. One can override the behavior like that:

$ nix-update hello --override-filename pkgs/applications/misc/hello/default.nix

With the --shell, --build, --test and --run flags the update can be tested. Additionally, the --review flag can be used to initiate a run of nixpkgs-review, which will ensure all dependent packages can be built. In order to ensure consistent formatting, the --format flag will invoke nixpkgs-fmt.

# Also runs nix-build
$ nix-update --build nixpkgs-review
# Also runs nix-build nixpkgs-review.tests
$ nix-update --test nixpkgs-review
# Also runs nix-shell
$ nix-update --shell nixpkgs-review
# Also runs nix run
$ nix-update --run nixpkgs-review
# Run `nixpkgs-review wip` to validate dependent packages
$ nix-update --review nixpkgs-review
# Format file
$ nix-update --format nixpkgs-review

Nix-update also can optionally generate a commit message in the form attribute: old_version -> new_version with the applied version update:

$ nix-update --commit bitcoin-abc
...
[master 53d68a6a5a9] bitcoin-abc: 0.21.1 -> 0.21.2
1 file changed, 2 insertions(+), 2 deletions(-)

By default, nix-update will attempt to update to the next stable version of a package. Alphas, betas, release candidates and similar unstable releases will be ignored. This can be affected by changing the parameter version from its default value stable to unstable.

$ nix-update sbt
Not updating version, already 1.4.6

$ nix-update sbt --version=unstable
Update 1.4.6 -> 1.5.0-M1 in sbt

Development setup

First clone the repo to your preferred location (in the following, we assume ~/ - your home):

$ git clone https://github.com/Mic92/nix-update/ ~/nix-update

Than enter the dev shell:

$ cd ~/nix-update
$ nix develop

Change to the repository that contains the nix files you want to update, i.e. nixpkgs:

$ cd nixpkgs

Now you can run nix-update just by specifying the full path to its executable wrapper:

$ ~/git/nix-update/bin/nix-update --commit hello

TODO

• create pull requests
• update unstable packages from git to latest master

Known Bugs

nix-update might not work correctly if a file contain multiple packages as it performs naive search and replace to update version numbers. This might be a problem if:

• A file contains the same version string for multiple packages.
• name is used instead of pname and/or ${version} is injected into name.

Related discussions:

• https://github.com/repology/repology-updater/issues/854
• https://github.com/NixOS/nixpkgs/issues/68531#issuecomment-533760929

Related projects:

• nixpkgs-update is optimized for mass-updates in nixpkgs while nix-update is better suited for interactive usage that might require user-intervention i.e. fixing the build and testing the result. nix-update is also not limited to nixpkgs.