lix -

Age	Commit message (Collapse)	Author
2021-11-25	Fix the error when accessing a forbidden path in pure eval	regnat
	If we’re in pure eval mode, then tell that in the error message rather than (wrongly) speaking about restricted mode. Fix https://github.com/NixOS/nix/issues/5611
2020-12-03	Move 'nix hash-' and 'nix to-' to 'nix hash'	Eelco Dolstra
	From the 'nix' UX review.
2020-12-02	nix eval: Add option to write a directory	Eelco Dolstra
	This is useful for generating the nix manpages, but it may have other applications (like generating configuration files without a Nix store).
2019-11-27	nix: Add --expr flag	Eelco Dolstra
	This replaces the '(...)' installable syntax, which is not very discoverable. The downside is that you can't have multiple expressions or mix expressions and other installables.
2019-04-08	nix: Add --impure as a shorter alias of --no-pure-eval	Eelco Dolstra

2019-04-08	Fix tests	Eelco Dolstra

2018-01-16	Add pure evaluation mode	Eelco Dolstra
	In this mode, the following restrictions apply: * The builtins currentTime, currentSystem and storePath throw an error. * $NIX_PATH and -I are ignored. * fetchGit and fetchMercurial require a revision hash. * fetchurl and fetchTarball require a sha256 attribute. * No file system access is allowed outside of the paths returned by fetch{Git,Mercurial,url,Tarball}. Thus 'nix build -f ./foo.nix' is not allowed. Thus, the evaluation result is completely reproducible from the command line arguments. E.g. nix build --pure-eval '( let nix = fetchGit { url = https://github.com/NixOS/nixpkgs.git; rev = "9c927de4b179a6dd210dd88d34bda8af4b575680"; }; nixpkgs = fetchGit { url = https://github.com/NixOS/nixpkgs.git; ref = "release-17.09"; rev = "66b4de79e3841530e6d9c6baf98702aa1f7124e4"; }; in (import (nix + "/release.nix") { inherit nix nixpkgs; }).build.x86_64-linux )' The goal is to enable completely reproducible and traceable evaluation. For example, a NixOS configuration could be fully described by a single Git commit hash. 'nixos-rebuild' would do something like nix build --pure-eval '( (import (fetchGit { url = file:///my-nixos-config; rev = "..."; })).system ') where the Git repository /my-nixos-config would use further fetchGit calls or Git externals to fetch Nixpkgs and whatever other dependencies it has. Either way, the commit hash would uniquely identify the NixOS configuration and allow it to reproduced.