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lsp-mode: update contents and screenshot links
Fangrui Song
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lsp-mode.md
42
lsp-mode.md
@ -3,14 +3,12 @@
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3. Open a source file where either [[.ccls|Project-Setup#ccls-file]] or [[compile_commands.json|Project-Setup#compile_commandsjson]] is in the project root (it works without them, if you don't need extra compiler command line options like `-I`)
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4. `(require 'ccls)`, `M-x lsp`
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`ccls.el` used to be based on the old interface `lsp-mode.el` of lsp-mode and the entry was `lsp-ccls-enable`.
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`(require 'lsp)` and `M-x lsp` should be used instead now. See https://github.com/emacs-lsp/lsp-mode/issues/479 , the old interface `lsp-mode.el` is deperecated.
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Alternatively, you may install https://github.com/joaotavora/eglot
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### Configure
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#### doom-emacs
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Set `(cc +lsp)` in your `~/.config/doom/init.el`
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#### spacemacs
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set `c-c++-backend` to `lsp-ccls` in the `+lang/c-c++` layer
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@ -23,14 +21,12 @@ set `c-c++-backend` to `lsp-ccls` in the `+lang/c-c++` layer
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(use-package company-lsp :commands company-lsp)
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(use-package ccls
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:hook ((c-mode c++-mode objc-mode) .
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:hook ((c-mode c++-mode objc-mode cuda-mode) .
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(lambda () (require 'ccls) (lsp))))
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```
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The only required configuration is `ccls-executable`. Others have good defaults.
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`xref-find-definitions` (default: `M-.`) / highlighting of the symbol at point / type signature in echo area should work out-of-box. Read on for customization and more features.
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```elisp
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(setq ccls-executable "/path/to/ccls/Release/ccls")
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;; (setq ccls-args '("--log-file=/tmp/ccls.log"))
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@ -38,10 +34,7 @@ The only required configuration is `ccls-executable`. Others have good defaults.
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You may leave `ccls-executable` unchanged (default: `ccls`) and create a [shell script wrapper](Install#shell-script-wrapper).
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Some common settings to lsp-mode lsp-ui and emacs-ccls:
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* doom-emacs https://github.com/hlissner/doom-emacs/pull/716
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* MaskRay's doom-emacs configuration: <https://github.com/MaskRay/Config/blob/master/home/.config/doom/modules/private/my-cc/config.el>
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`xref-find-definitions` (default: `M-.`) / highlighting of the symbol at point / type signature in echo area should work out-of-box. Read on for customization and more features.
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#### Projects with subprojects
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@ -91,9 +84,8 @@ There are Helm/Ivy alternatives for `xref-find-{definitions,references,apropos}`
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`lsp-ui-peek-find-{definitions,references}` from [lsp-ui-peek.el](https://github.com/emacs-lsp/lsp-ui/blob/master/lsp-ui-peek.el) provide peek views. An additional benefit is you get a window local jump list dedicated to cross references (`lsp-ui-peek-jump-forward` `lsp-ui-peek-jump-backward`)
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<img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/emacs-ccls/lsp-ui-xref.webp" title="lsp-ui-peek-find-references" width=70%>
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<img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/emacs-ccls/reference-hydra.webp" title="references+hydra" width=70%>
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Refer to [MaskRay's doom-emacs configuration](https://github.com/MaskRay/Config/blob/master/home/.config/doom/modules/private/my-cc/autoload.el) for fine-grained `textDocument/references` (different roles: Read/Write/Dynamic/...)
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@ -104,9 +96,10 @@ The identifier (or user-defined operator) at point is highlighted with its other
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### imenu/workspace symbol search
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Use [lsp-imenu.el](https://github.com/emacs-lsp/lsp-mode/blob/master/lsp-imenu.el) for `textDocument/documentSymbol` (outline). [lsp-ui-imenu.el](https://github.com/emacs-lsp/lsp-ui/blob/master/lsp-ui-imenu.el) provides a sidebar.
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There are two ways to invoke `textDocument/documentSymbol` (outline):
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* `M-x imenu`. Requires [lsp-imenu.el](https://github.com/emacs-lsp/lsp-mode/blob/master/lsp-imenu.el)
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* `M-x lsp-ui-imenu`. Requires [lsp-ui-imenu.el](https://github.com/emacs-lsp/lsp-ui/blob/master/lsp-ui-imenu.el).
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`xref-find-apropos` (default: `C-M-.`) invokes `workspace/symbol` to fuzzy-find symbols in the project. However, the function tries to be smart and splits the pattern and `regexp-quote` them for you, which actually gets in the way. Consider using `lsp-ui{,-peek}-workspace-symbol` in the lsp-ui package.
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@ -114,7 +107,9 @@ For a symbol named `Name::FooBar`, all of `FooBar`, `foo bar`, `nafoba` find the
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### Cross reference extensions
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Aside from definitions/references/workspace symbol, ccls provides some LSP extensions that find base/derived classes/methods, vars of a type, callers of a function. You may call:
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See [[LSP Extensions]] for the description of these extensions.
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You may call:
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```elisp
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;; direct callers
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(lsp-find-custom "$ccls/call")
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@ -183,7 +178,7 @@ Hierarchies provide a flattened xref interface:
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### Documentation (comments)
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lsp-ui-doc.el renders comments in a child frame (Emacs >= 26) or inline (< 26).
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<img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/emacs-ccls/lsp-ui-doc.webp" title="lsp-ui-doc" width=70%>
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```elisp
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(setq lsp-ui-doc-include-signature nil) ; don't include type signature in the child frame
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@ -198,7 +193,9 @@ Add `company-lsp` to `company-backends`. ccls has a fuzzy matching algorithm to
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(setq company-transformers nil company-lsp-async t company-lsp-cache-candidates nil)
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```
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Install `company-quickhelp` to see the attached comments for the selected completion item.
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<img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/emacs-ccls/company-lsp.webp" title="company-lsp" width=50%>
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If completion does not work for you, make sure company-lsp is used: run <kbd>M-x</kbd> `company-diag` and make sure`Used backend:` includes `company-lsp`.
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@ -243,7 +240,7 @@ For the long story, refer to the corresponding [emacs-devel thread](https://list
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### Call/member/inheritance Hierarchies || primary template/partial specialization
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`M-x ccls-member-hierarchy`
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<img src="https://raw.githubusercontent.com/MaskRay/ccls-static/master/emacs-ccls/ccls-member.webp" title="$ccls/member hierarchy:true" width=70%>
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```elisp
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(ccls-call-hierarchy nil) ; caller hierarchy
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@ -257,7 +254,6 @@ For the long story, refer to the corresponding [emacs-devel thread](https://list
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```
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Side notes: `ccls-inheritance-hierarchy` also works fine with jumping between primary template and partial specialization.
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### Code lens
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