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authorslotThe <soliditsallgood@mailbox.org>2021-01-15 08:35:19 +0100
committerslotThe <soliditsallgood@mailbox.org>2021-01-15 08:58:58 +0100
commit20a64e67074460878a693c2d89842b1e1dad120c (patch)
treeae03e9ff7f097a4d2d59f7f1e0c727f005442e04 /contributing.org
parented3eb179369cdcbf33fd72dfc43d6426b77fe681 (diff)
downloadxmobar-20a64e67074460878a693c2d89842b1e1dad120c.tar.gz
xmobar-20a64e67074460878a693c2d89842b1e1dad120c.tar.bz2
Extract writing your own plugin into its own file
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@@ -19,9 +19,10 @@ this case please don't merge any branches, but actually rebase! This is
a very nifty feature that =git= offers in order to remain a clean
history.
-Give your commits descriptive names! Further, it's also highly recommended to
-add a description of /why/ you made a certain change. The syntax for this is
-*commit message*, blank line, *more description*. For example:
+Give your commits descriptive names! Further, it's also highly
+recommended to add a description of /why/ you made a certain change.
+The syntax for this is *commit message*, blank line, *more description*.
+For example:
#+begin_src shell
Commit Message (max. 50 characters)
@@ -48,72 +49,5 @@ request:
Please also remember to update the =changelog.md= file, as well as any
other documentation that your pull request touches upon. For example,
-if you add a new plugin you should update the [[./doc/plugins.org][plugins documentation]].
-
-* Writing Your Own Plugin
-
-Writing a plugin for xmobar is very simple!
-
-First, you need to create a data type with at least one constructor.
-Next you must declare this data type an instance of the =Exec= class, by
-defining the one needed method (alternatively =start= or =run=) and 3
-optional ones (=alias=, =rate=, and =trigger=):
-
-#+begin_src haskell
- start :: e -> (String -> IO ()) -> IO ()
- run :: e -> IO String
- rate :: e -> Int
- alias :: e -> String
- trigger :: e -> (Maybe SignalType -> IO ()) -> IO ()
-#+end_src
-
-=start= must receive a callback to be used to display the =String=
-produced by the plugin. This method can be used for plugins that need to
-perform asynchronous actions. See =src/Xmobar/Plugins/PipeReader.hs= for
-an example.
-
-=run= can be used for simpler plugins. If you define only =run= the
-plugin will be run every second. To overwrite this default you just need
-to implement =rate=, which must return the number of tenth of seconds
-between every successive runs. See [[https://github.com/jaor/xmobar/blob/master/examples/xmobar.hs][examples/xmobar.hs]] for an example of
-a plugin that runs just once, and [[https://github.com/jaor/xmobar/blob/master/src/Xmobar/Plugins/Date.hs][src/Xmobar/Plugins/Date.hs]] for one
-that implements =rate=.
-
-Notice that Date could be implemented as:
-
-#+begin_src haskell
- instance Exec Date where
- alias (Date _ a _) = a
- start (Date f _ r) = date f r
-
- date :: String -> Int -> (String -> IO ()) -> IO ()
- date format r callback = do go
- where go = do
- t <- toCalendarTime =<< getClockTime
- callback $ formatCalendarTime defaultTimeLocale format t
- tenthSeconds r >> go
-#+end_src
-
-This implementation is equivalent to the one you can read in
-=Plugins/Date.hs=.
-
-=alias= is the name to be used in the output template. Default alias
-will be the data type constructor.
-
-After that your type constructor can be used as an argument for the
-Runnable type constructor =Run= in the =commands= list of the
-configuration options.
-
-** Using a Plugin
-
-To use your new plugin, you need to use a pure Haskell configuration for
-xmobar, and load your definitions there. You can see an example in
-[[./examples/xmobar.hs][examples/xmobar.hs]] showing you how to write a Haskell configuration that
-uses a new plugin, all in one file.
-
-When xmobar runs with the full path to that Haskell file as its argument
-(or if you put it in =~/.config/xmobar/xmobar.hs=), and with the xmobar
-library installed (e.g., with =cabal install --lib xmobar=), the Haskell
-code will be compiled as needed, and the new executable spawned for you.
-
-That's it!
+if you add a new plugin (see [[./doc/write-your-own-plugin.org][here]] for more information) you should
+update the [[./doc/plugins.org][plugins documentation]].