Features

• nixfmt (nixfmt-rfc-style) is now used by default if no formatter is set, as it's becoming the official formatter for nixpkgs.

  See: NixOS/rfcs#166

• Support contextual keyword __curPos.

• Support experimental |> and |< operators since Nix 2.24 (#155).

  See: https://github.com/NixOS/nix/blob/2.24.0/doc/manual/src/language/operators.md#pipe-operators

• --deny-warnings flags for nil diagnostics (#157).

• Multiple files support for nil diagnostics (#126).

• New assist remove_unused_binding (#159).

  • { foo, bar }: { foo = 1; } => { foo }: { foo = 1; }
  • let foo = 1; in { } => let in { }

• Assist pack_bindings now supports converting implicit attrset into explicit nested one.

  • { foo.bar = 1; } => { foo = { bar = 1; }; }

Fixes

• Reword and simplify labels of assists, so it's easier to get what is does.

• Compatibility with latest Nix and Nixpkgs.

• Compatibility with flakes containing relative subflakes.

Internal

• The main flake.nix is simplified to only has nixpkgs dependency.

  devShells are moved to ./dev/flake.nix subflake.

• Bump MSRV to 1.77

• Bump various dependencies.

• Documentation tweaks.

Sorry for the long hiatus. Life is hard and many things happened this year.

This release contains mostly bugfixes.

Fixes

• Improve completion from nowhere (24x7 or Ctrl-Space triggered completion).

• Fix option completion of types.attrsOf (types.submodule {}) (#102).

• Ignore _ prefixed identifier from liveness check.

• Fail textDocument/formatting when no formatter is set (#108).

• Add meta.mainProgram for package (#110).

• Fix panic on merged recursive and non-recursive attrsets (#114).

• Fix diagnostics exit code help text (#136).

• Change nixos.wiki links to the new official website wiki.nixos.org (#137, #144).

• Fix build with Nix 2.24

• Only strip query parameters and fragment for flake ref URLs (#141).

Features

• Load LSP configuration from initializationOptions (#84), for clients
  without workspace/configuration support.

• Use semantic token type boolean for true and false. (#52) This makes it
  possible to distinguish them from null which has the token type constant.

• nil diagnostics exists with code 1 only if there is any error. (#90)
  Warnings are not counted for exit code now.

• Impl memory limit configuration for flake evaluation, with config key
  nil.nix.maxMemoryMB. Only Linux platforms are supported yet.

• Highly experimental SSR (Structural Search & Replace) impl as CLI nil ssr.

Fixes

• Send workspace/configuration only if the client supports it (#85)

• Only show references of with when the cursor is exactly on with.

• Also show references of a variable when cursor's on one of them (#86).

• Fix flake reloading condition on file changes (#92).

• Fix popup message to mention autoArchive config (#96).

• Fix build with nix 2.17 (#94).

• Fix missed diagnostic update on the first open (#89).

• Fix nondeterminism of diagnostics ordering.

• Fix parsing of block comments.

• Fix offset conversion for end of file (#100).

• Fix many more typos.

Internal

• Response time and size logging via NIL_LOG=nil=debug. Useful for debugging.
  Log messages >=DEBUG are now included in the release build, though disabled
  unless having filter envvar NIL_LOG set.

• Delay link resolution in textDocument/documentLink.
  This reduces the time of textDocument/documentLink from ~100ms down
  to ~20ms for MB-sized files. Editors doing frequent query of links like
  coc.nvim can benefit a lot from it.

• Filter out far away spans in textDocument/documentHighlight as
  optimization. They are not displayed anyway.

• Enable LTO for release builds.

• Bump MSRV to 1.70

• Drop support for file-backed stdin/stdout in language server mode.
  It makes no sense.

This is a patch release for previously missing configurables of the new
auto-evaluation features.

Fixes

• Add configurations to enable/disable and customize auto-evaluations.
  nil.nix.flake.{autoArchive,autoEvalInputs,nixpkgsInputName}
  See ./docs/configuration.md for more details.

• autoEvalInputs is disabled by default due to issues (#79) about
  flake locks.

• Nixpkgs detection for NixOS options now checks existences of lib and
  module-list.nix to reduce mis-detections. (#80)

Happy International Workers' Day! Fight for workers' rights against
overwork "culture" in China!

Features

• Automatic flake archiving.

• Flake inputs evaluation and type inference. (#76)

  Due to limitations of nix flake show backend, only known output fields are
  completed, including packages or devShells, but not custom lib.
  legacyPackages is only traversed since Nix 2.14, the first version to
  support filtering packages for only the current system.

  # flake.nix
  {
    inputs.rust-overlay.url = "github:oxalica/rust-overlay";
    outputs = { rust-overlay, ... }: let
      rustPkg = rust-overlay.packages.x86_64-linux.|; # default, rust, rust_nightly, ...
    in ...;
  }

• Dynamic fields are now inferred to the rest type.
  This helps the common flake output usage:
  rust-overlay.packages.${system}.| # default, rust, ...

• Auto-reloading flake when flake.{nix,lock} is changed on disk.

  This requires the LSP client to support didChangeWatchedFiles capability.
  VSCode and coc.nvim support it out-of-box, while Neovim's builtin LSP
  requires manual configurations
  (neovim/neovim#22405 (comment)).

• Progress bars for various costly loading operations.

Fixes

• Suppress unused warnings for flake auto-inputs. (#73)
• Parsing errors for string escapes. (#75)
• Completion for fresh-created unsaved flake.nix.

Internal

• The LSP frontend is heavily refactored into async-style. The framework
  library is also switched from lsp-server to async-lsp. (#74)
• MSRV is bumped to 1.68

Features

• Code actions about string rewriting. (#69)

  • quote_attr and unquote_attr to quote/unquote attributes in
    attrset or let-in.
  • rewrite_string_to_indented and rewrite_indented_to_string to
    rewrite between two string styles.
  • rewrite_uri_to_string to rewrite deprecated URI literals into
    strings.

• Completion for NixOS options.

  This requires a working Flake setup, which has an input named
  nixpkgs for the source of NixOS options. It must be a relatively
  recent version of github:NixOS/nixpkgs. If you have multiple nixpkgs
  in your inputs, you can create an alias inputs.nixpkgs.follows = "the-input-to-use" to select one.

  If it's correctly recognized and evaluated, any NixOS-module-like Nix
  files will get completions and type information for NixOS options.

  For example:

  { ... }:
  {
    nix.settings.|  # -> allowed-users, auto-optimise-store, ...
  }

• The LSP server now reports server name nil and its version (if any)
  to the client through serverInfo during initialization.

Fixes

• Parsing errors when ' appears in indented strings.
• Panics when a flake input is named self.
• Unescaped identifiers and/or attributes in completions.
• Recognition of flake.nix when rec { ... } is used in top-level.

Features

• Warnings for unused parameters in limited known cases, including NixOS
  modules, packages, and flake inputs.
• Code action remove_empty_let_in. (#63)
  let in foo => foo
• Type inferences for attrset with unknown keys but known value types.
  (#68)

Fixes

• Documentations. (#65)
• Types of some flake outputs. (#66)
• Crash when saving files. (#67)
• Errors when handling flakes with cyclic inputs. (#71)

Features

• Better completions, documentations and types for builtins.
  Now builtins.| completes correctly with signatures and
  documentations.

• Virtual path support. This is used by VSCode or coc.nvim when editing
  a new untitled file with filetype set to nix.

• A coc.nvim extension coc-nil under editors/coc-nil for simpler
  startup. Currently it is still working in progress and does nothing
  more than passing coc.nvim configurations to the LSP.

  The extension is exported as flake output package coc-nil, or
  vimPlugins.coc-nil when using overlays.

Fixes

• follows resolution of flake locks.
• Panics when flake_graph is accessed but not set.
• Documentation typos.

Happy EastAsianLunisolarCalendar new year!

Breaking

• Bump minimal supported rust version to 1.66

Features

• Type schema for flake.nix.
  Common fields of flake definitions as well as defined inputs are subjects to
  completion now.

• Goto-definition for flake inputs. The name in inputs.name = ... and
  outputs = { name, ... }: ... will take you to the flake.nix of the input
  inside Nix store.

  This requires an working nix binary and a valid flake.lock.

• Completion for pat-parameters definitions.
  This also works in parameters of flake outputs.
  { inputs.nixpkgs.url = "..."; outputs = { n| }: { }; }

• Add CLI for diagnostics. Now you can also run nil as a linter.

• Support convert_to_inherit for let in and rec { }.

• Documentation of all code actions now lives in docs/code_actions.md.

Fixes

• LSP mishandling in DidChangeTextDocument, which caused issues on kakoune.
• Missed error and panic information in log. Now a backtrace is captured
  if possible when the worker panicked.

Happy GregorianCalendar new year!

Features

• Add many code actions for refactoring or fix.
  Thanks to figsoda@github for implementations.

  • "Convert to inherit" now supports multiple LHS or RHS.
    { a.b = b; } => { a = { inherit b; }; }
{ a = b.a; } => { inherit (b) a; }

  • Add unresolved names to top-level lambda parameters.
    { foo }: foo + bar => { foo, bar }: foo + bar

  • Remove empty inherits.
    { inherit; } => { }

• Names from with now have a special semantic token modifier
  withAttribute. One can add styles like underlines to them to distinguish
  them from other static bindings.
  There are examples dev/nix-ide-semantic-highlighting.patch for VSCode and
  dev/vim-coc.nix for (Neo)Vim/coc.nvim.

Fixes

• Names of semantic highlighting are tweaked. Now we use constant and
  builtin for builtin constants (true) and functions (map).
  The standard defaultLibrary group in themes usually represent names
  from the "standard library", like rust-analyzer did, which is not the
  same as "builtin" constants.