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path: root/src/libexpr/flake/flake.hh
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2020-02-05Add option --commit-lock-fileEelco Dolstra
2020-02-02Renamed ref / resolvedRef -> lockedRefEelco Dolstra
2020-01-29Add --update-input flag to update a specific flake inputEelco Dolstra
Typical usage: $ nix flake update ~/Misc/eelco-configurations/hagbard --update-input nixpkgs to update the 'nixpkgs' input of a flake while leaving every other input unchanged. The argument is an input path, so you can do e.g. '--update-input dwarffs/nixpkgs' to update an input of an input. Fixes #2928.
2020-01-29Clean up the lock file handling flagsEelco Dolstra
Added a flag --no-update-lock-file to barf if the lock file needs any changes. This is useful for CI systems if you're building a checkout. Fixes #2947. Renamed --no-save-lock-file to --no-write-lock-file. It is now a fatal error if the lock file needs changes but --no-write-lock-file is not given.
2020-01-29Add flag --override-input to override specific lock file entriesEelco Dolstra
E.g. $ nix flake update ~/Misc/eelco-configurations/hagbard \ --override-input 'dwarffs/nixpkgs' ../my-nixpkgs overrides the 'nixpkgs' input of the 'dwarffs' input of the top-level flake. Fixes #2837.
2020-01-24Respect lock files of inputs + fine-grained lock file controlEelco Dolstra
When computing a lock file, we now respect the lock files of flake inputs. This is important for usability / reproducibility. For example, the 'nixops' flake depends on the 'nixops-aws' and 'nixops-hetzner' repositories. So when the 'nixops' flake is used in another flake, we want the versions of 'nixops-aws' and 'nixops-hetzner' locked by the the 'nixops' flake because those presumably have been tested. This can lead to a proliferation of versions of flakes like 'nixpkgs' (since every flake's lock file could depend on a different version of 'nixpkgs'). This is not a major issue when using Nixpkgs overlays or NixOS modules, since then the top-level flake composes those overlays/modules into *its* version of Nixpkgs and all other versions are ignored. Lock file computation has been made a bit more lazy so it won't try to fetch all those versions of 'nixpkgs'. However, in case it's necessary to minimize flake versions, there now are two input attributes that allow this. First, you can copy an input from another flake, as follows: inputs.nixpkgs.follows = "dwarffs/nixpkgs"; This states that the calling flake's 'nixpkgs' input shall be the same as the 'nixpkgs' input of the 'dwarffs' input. Second, you can override inputs of inputs: inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>; inputs.nixops.inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>; or equivalently, using 'follows': inputs.nixpkgs.url = github:edolstra/nixpkgs/<hash>; inputs.nixops.inputs.nixpkgs.follows = "nixpkgs"; This states that the 'nixpkgs' input of the 'nixops' input shall be the same as the calling flake's 'nixpkgs' input. Finally, at '-v' Nix now prints the changes to the lock file, e.g. $ nix flake update ~/Misc/eelco-configurations/hagbard inputs of flake 'git+file:///home/eelco/Misc/eelco-configurations?subdir=hagbard' changed: updated 'nixpkgs': 'github:edolstra/nixpkgs/7845bf5f4b3013df1cf036e9c9c3a55a30331db9' -> 'github:edolstra/nixpkgs/03f3def66a104a221aac8b751eeb7075374848fd' removed 'nixops' removed 'nixops/nixops-aws' removed 'nixops/nixops-hetzner' removed 'nixops/nixpkgs'
2020-01-24HandleLockFile -> LockFileModeEelco Dolstra
2020-01-22resolveFlake -> lockFlakeEelco Dolstra
"resolve" is ambiguous (also used for registry resolution).
2020-01-22nix flake info: Don't show empty descriptionsEelco Dolstra
2020-01-21Pluggable fetchersEelco Dolstra
Flakes are now fetched using an extensible mechanism. Also lots of other flake cleanups.
2019-09-18Some effort to minimize flake dependenciesEelco Dolstra
For example, if the top-level flake depends on "nixpkgs/release-19.03", and one of its dependencies depends on "nixpkgs", then the latter will be mapped to "nixpkgs/release-19.03", rather than whatever the default branch of "nixpkgs" is. Thus you get only one "nixpkgs" dependency rather than two. This currently only works in a breadth-first way, so the other way around (i.e. if the top-level flake depends on "nixpkgs", and a dependency depends on "nixpkgs/release-19.03") still results in two "nixpkgs" dependencies.
2019-09-18Record original flakerefs in the lock file againEelco Dolstra
If 'input.<name>.uri' changes, then the entry in the lockfile for input <name> should be considered stale. Also print some messages when lock file entries are added/updated.
2019-08-30Remove 'name' attribute from flakesEelco Dolstra
This is no longer needed since flakes are given an identity in the 'inputs' attribute.
2019-08-30Turn flake inputs into an attrsetEelco Dolstra
Instead of a list, inputs are now an attrset like inputs = { nixpkgs.uri = github:NixOS/nixpkgs; }; If 'uri' is omitted, than the flake is a lookup in the flake registry, e.g. inputs = { nixpkgs = {}; }; but in that case, you can also just omit the input altogether and specify it as an argument to the 'outputs' function, as in outputs = { self, nixpkgs }: ... This also gets rid of 'nonFlakeInputs', which are now just a special kind of input that have a 'flake = false' attribute, e.g. inputs = { someRepo = { uri = github:example/repo; flake = false; }; };
2019-07-11Rename 'epoch' -> 'edition'Eelco Dolstra
2019-06-21Simplify getFlake() / fetchFlake() logicEelco Dolstra
2019-06-07Add flake evaluation cacheEelco Dolstra
This exploits the hermetic nature of flake evaluation to speed up repeated evaluations of a flake output attribute. For example (doing 'nix build' on an already present package): $ time nix build nixpkgs:firefox real 0m1.497s user 0m1.160s sys 0m0.139s $ time nix build nixpkgs:firefox real 0m0.052s user 0m0.038s sys 0m0.007s The cache is ~/.cache/nix/eval-cache-v1.sqlite, which has entries like INSERT INTO Attributes VALUES( X'92a907d4efe933af2a46959b082cdff176aa5bfeb47a98fabd234809a67ab195', 'packages.firefox', 1, '/nix/store/pbalzf8x19hckr8cwdv62rd6g0lqgc38-firefox-67.0.drv /nix/store/g6q0gx0v6xvdnizp8lrcw7c4gdkzana0-firefox-67.0 out'); where the hash 92a9... is a fingerprint over the flake store path and the contents of the lockfile. Because flakes are evaluated in pure mode, this uniquely identifies the evaluation result.
2019-06-05Move flake-related stuff to src/libexpr/flakeEelco Dolstra