74fdbb6795
Enabling a company backend for a specific mode was a tedious tasks with code scattered at different locations, one for local variable definitions, one for company hook function definitions and another where the backends were pushed to the local variables (which was problematic, since we ended up pushing the same backends over and over again with `SPC f e R`, pushes have been replaced by add-to-list calls in the new macro). All these steps are now put together at one place with the new macro spacemacs|add-company-backends, check its docstring for more info on its arguments. This macro also allows to define arbitrary buffer local variables to tune company for specific modes (similar to layer variables via a keyword :variables) The code related to company backends management has been moved to the auto-completion layer in the funcs.el file. A nice side effect of this move is that it enforces correct encapsulation of company backends related code. We can now easily detect if there is some configuration leakage when the auto-completion layer is not used. But we loose macro expansion at file loading time (not sue it is a big concern though). The function spacemacs|enable-auto-complete was never used so it has been deleted which led to the deletion of the now empty file core-auto-completion.el. The example in LAYERS.org regarding auto-completion is now out of date and has been deleted. An example to setup auto-completion is provided in the README.org file of the auto-completion layer. |
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funcs.el | ||
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README.org |
Elm layer
Description
This layer adds support for Elm.
It relies on elm-mode and flycheck-elm to provide the following features:
- Syntax highlighting.
- Intelligent indentation
- Auto-completion integration for company (default) or auto-complete modes, with using elm-oracle
- Syntax checking support using flycheck
- Integration with elm-make
- Integration with elm-repl
- Integration with elm-reactor
- Integration with elm-package
Install
Layer
To use this configuration layer, add it to your ~/.spacemacs
. You will need to
add elm
to the existing dotspacemacs-configuration-layers
list in this
file.
Elm Platform
The elm-platform
is a bundle of tools, including the elm-compiler
,
elm-make
, elm-reactor
, elm-repl
and elm-package
.
Depending on the method of installation, the elm-mode
package would need to be
able to access commands such as elm-reactor
or elm-make
.
OS X and Windows installers
Official installers for these operating systems are available from: http://elm-lang.org/install
Universal installer using npm
A npm based installer is available to, and provides pre-compiled binaries for certain operating system and architectures.
npm install --global elm
Also, note that you might need to set the ELM_HOME
environment variables to
the corresponding directory created by the installer.
If you are facing problems with previewing a buffer with elm-reactor
ensure
that the absolute path of the npm global bin file is on your path within emacs
OS X Users facing problems with elm-reactor
failing to properly install or
run, see this issue https://github.com/kevva/elm-bin/issues/28.
Source code
To build from source, see instructions here: https://github.com/elm-lang/elm-platform
elm-oracle
elm-oracle
can be used to show type signatures and docs for tokens under the
cursor and provide support for auto-completion, but it is not part of the
standard elm-platform.
Both the "company" and "auto-complete" backends are supported, but this layer is configured with company.
To install elm-oracle
, install node.js
and npm
, then
run this command:
npm install -g elm-oracle
elm-format
elm-format
can be used to format elm code according to a standard set of
rules.
To install elm-format
follow the the instructions for the version of elm
installed: https://github.com/avh4/elm-format
Also, note that if you use homebrew to install elm-format
the installed exe
has a version suffix, the installed command name can be set in your
~/spacemacs
:
(elm :variables
elm-format-command "elm-format-0.17")
Basic usage tips
Compilation
To control the name of the compiled JavaScript file, use SPC m c B
instead of
SPC m c b
. This will overwrite the --output
parameter of elm-make
to
[buffer-name].js
instead of the default.
Reactor
elm-reactor
is an interactive development tool, used to develop and debug Elm
programs. It will automatically compile an Elm program, and run it in the
browser, with editor agnostic support for hot-swapping and time-travel
debugging.
To preview Main.elm
, press C-c C-m
(or SPC m R m
).
Alternatively, to preview from buffer, press C-u C-c C-n
(or SPC m R
n
). To preview in debug mode, prefix with C-u
(or SPC u
).
By default, elm-reactor
with launch with its own generated index.html. To use
a custom html, you'd need to load the debuger excplictly and use an http daemon
to serve your custom file.
If needed, default values for host and port used by for the elm-reactor server
can be controlled by passing in these variables in your ~/.spacemacs
:
(elm :variables
elm-reactor-port "3000" ; default 8000
elm-reactor-address "0.0.0.0") ; default 127.0.0.1
Sort imports on save
Set elm-sort-imports-on-save
to t
to sort the imports in the current file on
every save.
(elm :variables elm-sort-imports-on-save t)
Key bindings
elm-make
Key Binding | Description |
---|---|
SPC m c b |
elm-compile-buffer |
SPC m c B |
spacemacs/elm-compile-buffer-override-output |
SPC m c m |
elm-compile-main |
elm-repl
Key Binding | Description |
---|---|
SPC m s i |
elm-repl-load |
SPC m s f |
send current function to REPL |
SPC m s F |
send current function to REPL and focus it in insert state |
SPC m s r |
send current region to REPL |
SPC m s R |
send current region to REPL and focus it in insert state |
elm-reactor
Key Binding | Description |
---|---|
SPC m R n |
elm-preview-buffer |
SPC m R m |
elm-preview-main |
elm-package
Key Binding | Description |
---|---|
SPC m p i |
elm-import |
SPC m p c |
elm-package-catalog |
SPC m p d |
elm-documentation-lookup |
package list buffer
Key Binding | Description |
---|---|
g |
elm-package-refresh |
v |
elm-package-view |
m |
elm-package-mark |
u |
elm-package-unmark |
x |
elm-package-install |
q |
quit-window |
elm-oracle
Key Binding | Description |
---|---|
SPC m h h |
elm-oracle-doc-at-point |
SPC m h t |
elm-oracle-type-at-point |
elm-format
Key Binding | Description |
SPC m = b |
elm-mode-format-buffer |
Refactoring
Key Binding | Description |
---|---|
SPC m r i |
elm-sort-imports |