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coc-ale.md

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IDE setup (Coc.nvim + ALE)

This config uses:

  • coc.nvim for language servers, completion, code actions, rename, etc.
  • ALE for linting/fixing and displaying diagnostics (Coc sends diagnostics to ALE).

Where things are configured

  • Plugin + keymaps: lua/coldboot/plugins/coc_ale.lua
  • Coc settings (inlay hints, insert/replace mode, etc): coc-settings.json

Keymaps (kept from the previous LSP setup)

Navigation / actions:

  • gd definition
  • gD declaration
  • gI implementation
  • gr references
  • K hover
  • <C-k> signature help
  • <leader>rn rename
  • <leader>ca code action (normal/visual)
  • <leader>D type definition
  • <leader>ds document symbols (:CocList outline)
  • <leader>ws workspace symbols (:CocList -I symbols)

Formatting:

  • <leader>f format buffer (Coc format, falls back to :ALEFix)
  • :Format same as above
  • :ColdbootFormatToggle toggles ALE fix-on-save

Completion (IntelliJ-like)

In insert mode:

  • <C-n> / <C-p>: if completion menu is visible, move selection; otherwise trigger completion.
  • <CR>: accept completion without overwriting text to the right of the caret (“insert”).
  • <Tab>: accept completion and overwrite the word to the right of the caret (“replace”).

Inlay hints

Inlay hints are enabled via coc-settings.json.

  • Toggle for the current buffer: :CocCommand document.toggleInlayHint

Useful commands

  • :CocInfo show Coc status
  • :CocConfig edit Coc settings
  • :ALEInfo show ALE status
  • :Mason install/update LSP binaries (this config auto-installs gopls, rust-analyzer, pyright)

Notes on external tools

ALE fixers/linters call external binaries (e.g. eslint, prettier, golangci-lint, rustfmt, black, ruff). Install them per project (recommended) or globally so ALE can run them.