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smile13241324 58e342f242 [dart] Explain LSP dependency and make layer require LSP layer 
The dart layer requires the official LSP server as the
emacs mode alternative is not longer properly maintained.
Therefore I have added some more description of how to
install the server properly and let the layer load
the LSP layer automatically.

In addition I have removed the unsupported variable
`dart-server-enable-analysis-server` from the
documentation.

See https://github.com/bradyt/dart-mode/wiki/LSP for
details.
2019-09-28 23:01:49 +02:00

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dart layer

/TakeV/spacemacs/media/commit/9c2cb17e540064654b7ac3fe00ed99174d46e031/layers/+lang/dart/img/dart.png

Description

This layer adds support for Dart language, and could be optionally used for Flutter development as well.

Features:

  • Syntax Highlight
  • Error checking with flycheck
  • Go to Definition
  • Dart Analyzer integration
  • Key bindings

Install

Layer

To use this configuration layer, add it to your ~/.spacemacs. You will need to add dart to the existing dotspacemacs-configuration-layers list in this file.

Dart SDK location

The layer itself will use the dart executable location if available on the execution path, but it is possible to define the location manually. It should point to the folder, and end with /.

  (dart :variables dart-server-sdk-path "~/path/to/dart-sdk/")

Flutter integration

Flutter comes with a internal Dart SDK, which can be used to provide all the integration tools.

  (dart :variables dart-server-sdk-path "<flutter-path>/bin/cache/dart-sdk/")

LSP

This layer requires an instance of a dart lsp server to work properly. You can execute below command to install the official dart lsp server. Make sure that the executable is available on your path.

  pub global activate dart_language_server

Configuration

For additional variables check the dart-server documentation.

Format on save 

  (dart :variables dart-server-format-on-save t)

Key bindings

Normal mode

Some of the commands will instantiate a new Dart Analyzer server if necessary, while others work without using a Dart Analyzer connection.

When dart-server-enable-analysis-server is enabled, most of the commands become Async, and there might be a delay when executing them.

Key binding Description
SPC m h h, SPC m ? Displays hover information for the current point.
SPC m h b Displays information at point on a new buffer.
gd, SPC m g Go to definition.
SPC m f d Find members declarations by name.
SPC m f r Find members references by name.
SPC m f d Find top-level declarations by name.
SPC m = Format buffer

Insert mode

Key binding Description
<tab> Expand previous word using Analyzer if available
C-<tab> Expand including parameters

Popup screens

Key binding Description
q Close popup
gr Execute last command to repopulate buffer