[Haskell-cafe] ANN: Leksah 0.10.0

[jutaro]

Daniel Fischer wrote:
> 
> On Friday 22 April 2011 12:40:17, Hamish Mackenzie wrote:
>> Yesterday we uploaded our official 0.10.0 release (0.10.0.4) to Hackage
> 
> I'm trying to try it, but I run into a couple of problems.
> Most are probably me looking in the wrong places, so let's begin with 
> those.
> 
> By default, the editor pane is on the left hand side and the module
> browser 
> or whatnot on the right. Very irritating. How do I switch the positions?
> I tried swapping LeftP and RightP in Edit Prefs -> Initial Pane positions, 
> but to no avail.
> 

Well, it is a bit more intricate to invert the sides. After 
* swapping LeftP and RightP in Edit Prefs -> Initial Pane positions
* Close all panes and pane groups. (You may leave an editor window open,
so that you better see what happens in the next steps).
* Collapse all (Hit Ctrl-1 - 2 times)
* Split vertical (Hit Ctrl-2), put the focus to the left, split horizontal
(Hit Ctrl-3)
* Go to Panes Menu and reopen the Log and the Browser and an editor Window
* Configure tabs as you like
* Save the session or restart Leksah 


Daniel Fischer wrote:
>  
> Autocomplete starts at the first letter of any new word, so writing a 
> function definition
> 
> bar j
>   | j == 0 = whatever
>   | otherwise = somethingElse
> 
> requires paying attention and taking some action to not end up with
> 
> bar join| j == whatever ...
> 
> How do I configure autocompletion to only begin after three or four
> letters 
> have been typed?
> 
Go to Edit Prefs -> GUI Options, and select "Complete only on Hotkey", then
hit
Ctrl-Space if you want completion.


Daniel Fischer wrote:
>  
> Decreasing indentation via backspace goes one column per backspace, how
> can 
> I configure it to go to the next (previous) tab position on backspace in 
> the leading whitespace of a line?
> 
You can't do this currently, but you can post a wish for enhancement to our
issue tracker.


Daniel Fischer wrote:
>  
> Now, those configuration questions out of the way:
> On first startup, I pointed leksah to
> ~/.cabal/packages/hackage.haskell.org 
> for sources (hoping it would know to unpack them and copy them to 
> ~/.leksah-0.10/packageSources, run haddock on them and what else it
> needs). 
> 

Please try to run Leksah with the default config
(~/.leksah-0.10/packageSources) 


Daniel Fischer wrote:
>  
> It did indeed copy a bunch of sources there and invoked cabal and ghc a 
> number of times, but it left out about half of the installed packages.
> It used an awful lot of memory to do that, peak about 1300MB virtual,
> 800MB 
> resident, which means swapping and thrashing (unless I shut down 
> practically everything else - I have only 1G of RAM).
> Okay, for collecting metadata on the first startup, I could live with that 
> (though, if it handled packages sequentially, it should use less memory).
> 
> But on the second startup and the third, although it didn't invoke cabal
> or 
> ghc anymore,  the memory usage was about the same, effectively knocking
> out 
> my system for more than ten minutes.
> On the third, I had not enough patience and killed it, leksah-server
> showed 
> no signs of stopping within two minutes after kill -TERM, so I had to kill 
> -KILL it.
> 
> What can I do to make leksah a good memory-citizen?
> With the current behaviour, it is unusable for me, unfortunately.
> 

Indeed leksah may use more memory on the first run (actually it is ghc,
which uses it).
But on consecutive starts it may use about/up to 150MB, but not the numbers
you give.
So please try to run Leksah with the default config, and see if the problem
remains.

Jürgen

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