Allow installation via package managers

.github/workflows/test.yml

@@ -0,0 +1,42 @@
+name: CI
+
+on:
+  push:
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        emacs_version:
+          - 27.2
+          - 26.3
+          - 25.3
+
+    steps:
+    - name: Set up Emacs
+      uses: purcell/setup-emacs@master
+      with:
+        version: ${{matrix.emacs_version}}
+
+    - name: Install Eldev
+      run: curl -fsSL https://raw.github.com/doublep/eldev/master/webinstall/github-eldev | sh
+
+    - name: Check out the elisp source code
+      uses: actions/checkout@v2
+
+    - name: Test the uncompiled source
+      run: |
+        cd el
+        eldev -p -dtT test
+
+    - name: Compile and run tests again
+      run: |
+        cd el
+        eldev compile
+        eldev -p -dtT test

.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+*.elc
+.eldev
+/el/sclang-autoloads.el

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
+ - Ability to distribute via package managers
  - Support for `completion-at-point-functions` and `company` via `company-capf`
 
 ### Changed

CMakeLists.txt

@@ -1,4 +1,4 @@
 add_subdirectory(el)
-add_subdirectory(sc)
+add_subdirectory(sc/scide_scel)
 install(DIRECTORY HelpSource
         DESTINATION share/SuperCollider/Extensions/scide_scel/)

README.md

@@ -1,83 +1,130 @@
-Scel
-====
+# scel - sclang-mode for emacs
 
 SuperCollider/Emacs interface
 
+## Installation
 
-Installation requirements
--------------------------
+There are 3 options for installation:
 
-For the HTML help system, you will need emacs-w3m support.
+1. Using SuperCollider Quarks (recommended)
+2. From debian package `supercollider-emacs`
+3. From source
 
+Option #1 is the best cross-platform option, and is recommended. Whatever option
+you choose, make sure not to mix installation methods. In particular, do not
+install the Quark if you already have the supercollider-emacs package or if you
+compiled SuperCollider with the `-DSC_EL=ON` option. Otherwise you will get an
+error from SuperCollider about duplicated classes.
 
-Installation (default)
-----------------------
+### Install Option 1: SuperCollider's own package manager
 
-By default emacs-lisp files are installed in
+The repository contains two subprojects. `/el` contains the emacs-lisp
+implementation. `/sc` contains the SuperCollider code required to
+implement the Emacs interface. SuperCollider has its own package system
+called Quarks, which we can use to install both halves.
 
-`$prefix/share/emacs/site-lisp`
+Evaluate this code in the SuperCollider GUI by pasting it and pressing
+shift+enter:
 
-SuperCollider files are put in
+``` supercollider
+Quarks.install("https://github.com/supercollider/scel");
+```
 
-`$prefix/share/SuperCollider/Extensions/scide_scel`
+The scel repository will be downloaded to your local file system and the path
+will be added to your default `sclang_conf.yaml` file. (You can find its
+location by evaluating `Platform.userConfigDir`)
 
+Next, find out where scel was installed. You will use this install-path in your
+emacs config.
 
-The only thing you need to do is loading the sclang interface in your `~/.emacs`:
+``` supercollider
+Quarks.folder.postln;
 
+// -> /Users/jxa/Library/Application Support/SuperCollider/downloaded-quarks
 ```
+
+Now in your emacs config, add the `/el` subdirectory to your load path
+``` emacs-lisp
+;; in ~/.emacs
+
+;; Paste path from above, appending "/scel/el"
+(add-to-list 'load-path "/Users/jxa/Library/Application Support/SuperCollider/downloaded-quarks/scel/el")
 (require 'sclang)
 ```
+#### On macOS
 
-For the HTML help system to fully function also add
-```
-(require 'w3m)
+If `sclang` executable is not on your path, you may need to add it to your
+exec-path.
+
+``` emacs-lisp
+;; in ~/.emacs
+(setq exec-path (append exec-path '("/Applications/SuperCollider.app/Contents/MacOS/")))
 ```
 
+#### Installing with an emacs package manager
 
-Installation (detailed)
------------------------
+It's completely possible to install with
+[straight.el](https://github.com/raxod502/straight.el),
+[use-package](https://github.com/jwiegley/use-package),
+[doom](https://github.com/hlissner/doom-emacs), etc. Instructions for doing so
+are beyond the scope of this README, but note that `autoloads` are implemented
+for entry-point functions so if you like to have a speedy start-up time you can
+use the `:defer t` option.
 
-Put all `*.el` files in emacs' load-path. e.g. if you put them in
-`~/emacs/`, add the following lines to `~/.emacs` (or whatever your init
-file is called):
+### Install Option 2: Debian package
 
-```
-(add-to-list 'load-path "~/emacs")
-(require 'sclang)
-```
+There is a debian package which provides emacs integration called
+`supercollider-emacs`. Option #1 will likely be more recent, but 
+if you prefer you can install the package with:
 
-for the HTML help system to fully function also add
-```
-(require 'w3m)
+``` shell
+sudo apt install supercollider-emacs
 ```
 
-now put all `*.sc` files in sclang's library path, e.g. if you put them
-in a non-standard location, such as `~/SuperCollider/Emacs`, add the
-following to `~/.config/SuperCollider/sclang_conf.yaml` (Linux) or `~/Library/Application Support/SuperCollider/sclang_conf.yaml` (macOS):
+### Install Option 3: Installing from source
 
-```
-includePaths:
-    [~/SuperCollider/Emacs]
-```
+If you are building SuperCollider from source, you can optionally compile and
+install this library along with it. The cmake `-DSC_EL` flag controls whether
+scel will be compiled. On Linux machines `-DSC_EL=ON` by default. See the
+supercollider README files for more info.
 
-(note normally this is not needed as they are put into sclang's library
-path during installation with scons).
+## Installation requirements
 
+For the HTML help system, you will need emacs-w3m support, but you can still use
+the rest of the functionality without the w3m dependency.
 
-Usage
------
+```emacs-lisp
+;; in ~/.emacs
+(require 'w3m)
+```
 
-In order to automatically start sclang when invoking emacs, use the following command line:
+## Usage
 
-```
-$> emacs -sclang
+The main function which starts interacting with the sclang interpreter is
+`sclang-start`. You can execute that anywhere with `M-x sclang-start`, or from
+within a `.scd` buffer by pressing `C-c C-o`.
+
+If you know you want to launch sclang when you start emacs you can use the `-f`
+option to execute that function right away:
+
+``` shell
+# in your terminal
+emacs -f sclang-start
 ```
 
-you're now ready to edit, inspect and execute sclang code!
+## Configuration
+
+To fine-tune the installation from within emacs' graphical customization
+interface, type:
+
+`M-x sclang-customize`
 
+If you want to change from the default `sclang_conf.yaml` file used by your
+emacs sessions you can customize the `sclang-library-configuration-file`
+variable, but make sure that file loads the scel quark, or you won't be
+able to run sclang code.
 
-Getting help
-------------
+## Getting help
 
 Inside an sclang-mode buffer (e.g. by editing a .sc file), execute
 
@@ -87,11 +134,16 @@ and a window with key bindings in sclang-mode will pop up.
 
 `C-x C-h` lets you search for a help file
 
-`C-M-h` opens or switches to the Help browser (if no Help file has been opened, the default Help file will be opened).
+`C-M-h` opens or switches to the Help browser (if no Help file has been opened,
+the default Help file will be opened).
 
-`E` copies the buffer, puts it in text mode and sclang-minor-mode, to enable you to edit the code parts to try out variations of the provided code in the help file. With `C-M-h` you can then return to the Help browser and browse further from the Help file.
+`E` copies the buffer, puts it in text mode and sclang-minor-mode, to enable you
+to edit the code parts to try out variations of the provided code in the help
+file. With `C-M-h` you can then return to the Help browser and browse further
+from the Help file.
 
-`C-c C-e` allows you to edit the source of the HTML file, for example if you want to improve it and commit it to the repository.
+`C-c C-e` allows you to edit the source of the HTML file, for example if you
+want to improve it and commit it to the repository.
 
 To enable moving around in the help file with arrow keys add the following
 in your `~/.emacs`:
@@ -105,25 +157,18 @@ in your `~/.emacs`:
  (define-key w3m-mode-map [down] 'next-line)))
 ```
 
-This ensures that the arrow keys are just for moving through the document, and not from hyperlink to hyperlink, which is the default in w3m-mode.
-
-
-Customization
--------------
-
-To fine-tune the installation from within emacs' graphical customization interface, type:
-
-`M-x sclang-customize`
-
-In particular, you will have to customize `sclang-runtime-directory'.
+This ensures that the arrow keys are just for moving through the document, and
+not from hyperlink to hyperlink, which is the default in w3m-mode.
 
 
-Server control
---------------
+## Server control
 
-In the post buffer window, right-click on the server name; by default the two servers `internal` and `localhost` are available. You will get a menu with common server control operations.
+In the post buffer window, right-click on the server name; by default the two
+servers `internal` and `localhost` are available. You will get a menu with
+common server control operations.
 
-To select another server, step through the server list by left-clicking on the server name.
+To select another server, step through the server list by left-clicking on the
+server name.
 
-Servers instantiated from the language will automatically be available
-in the mode line.
+Servers instantiated from the language will automatically be available in the
+mode line.

el/Eldev

@@ -0,0 +1,6 @@
+; -*- mode: emacs-lisp; lexical-binding: t -*-
+;
+;; You can obtain eldev from https://github.com/doublep/eldev
+;; We use it for package development and running tests
+
+(eldev-use-plugin 'autoloads)

el/sclang-dev.el

@@ -13,13 +13,8 @@
 ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 ;; USA
 
-
-(eval-when-compile
-  (require 'sclang-util)
-  (require 'sclang-interp)
-  )
-
-
+(require 'sclang-util)
+(require 'sclang-interp)
 
 (sclang-set-command-handler
   'openDevSource

el/sclang-help.el

@@ -24,15 +24,29 @@
 (require 'sclang-interp)
 (require 'sclang-language)
 (require 'sclang-mode)
-(require 'sclang-vars)
+(require 'sclang-vars nil 'ignore-missing-file)
 (require 'sclang-minor-mode)
 
-(defcustom sclang-help-directory "~/SuperCollider/Help"
-  "*Directory where the SuperCollider help files are kept. OBSOLETE."
+(defun sclang-system-root ()
+  "Find the common install location for the platform."
+  (cond
+   ((boundp 'sclang-system-data-dir)
+    sclang-system-data-dir)
+
+   ((eql 'darwin system-type)
+    (expand-file-name "~/Library/Application Support/SuperCollider"))
+
+   ((and (eql 'gnu/linux system-type)
+         (file-exists-p "/usr/local/share/SuperCollider"))
+    "/usr/local/share/SuperCollider")
+
+   ((eql 'gnu/linux system-type)
+    "/usr/share/SuperCollider")))
+
+(defcustom sclang-system-help-dir (expand-file-name "Help" (sclang-system-root))
+  "Installation dependent help directory."
   :group 'sclang-interface
-  :version "21.3"
-  :type 'directory
-  :options '(:must-match))
+  :type 'directory)
 
 (defcustom sclang-help-path (list sclang-system-help-dir
 				  "~/.local/share/SuperCollider/Help")
@@ -41,6 +55,11 @@
   :version "21.4"
   :type '(repeat directory))
 
+(defcustom sclang-system-extension-dir (expand-file-name "Extensions" (sclang-system-root))
+  "Installation dependent extension directory."
+  :group 'sclang-interface
+  :type 'directory)
+
 (defconst sclang-extension-path (list sclang-system-extension-dir
 				      "~/.local/share/SuperCollider/Extensions")
   "List of SuperCollider extension directories.")

el/sclang-interp.el

@@ -15,9 +15,8 @@
 ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 ;; USA
 
-(eval-when-compile
-  (require 'sclang-util)
-  (require 'compile))
+(require 'sclang-util)
+(require 'compile)
 
 ;; =====================================================================
 ;; post buffer access
@@ -303,6 +302,7 @@ If EOB-P is non-nil, positions cursor at end of buffer."
        (list "-s"))
      (list "-iscel"))))
 
+;;;###autoload  (autoload 'sclang-start "sclang" "Start SuperCollider process." t)
 (defun sclang-start ()
   "Start SuperCollider process."
   (interactive)

el/sclang-minor-mode.el

@@ -16,11 +16,8 @@
 ;;; along with this program; if not, write to the Free Software
 ;;;  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 
-(eval-when-compile
-  (require 'sclang-util)
-  (require 'sclang-mode)
-  )
-
+(require 'sclang-util)
+(require 'sclang-mode)
 
 (easy-mmode-define-minor-mode sclang-minor-mode
   "Toggle sclang-minor-mode.