Linux Desktop on the Max2

[sogaiu]

Originally Posted by sogaiu

there appear to be many more packages

Enough to get JVM-based languages to work too -- had some success with getting a REPL for clojure via Leiningen to come up. (Now if the Clojure on Android project would awaken from slumber.)

Even apktool is available and seems to work.

[mdp]

Originally Posted by sogaiu

Even apktool is available and seems to work.

Backward engineering on-site!

[Randy11]

Originally Posted by sogaiu

Are there any specific ruby-related things you'd like tested?

The first usages for me could be :

• parsing ("parslet");
• database with Sqlite and "sequel";
• for test or fun Sinatra and GUI (maybe Tk);
• with the "Rspec" gem.

[sogaiu]

Originally Posted by Randy11

parsing ("parslet");

I tested this lightly with:

gem install parslet

and via irb (example from http://kschiess.github.io/parslet/get-started.html):

require 'parslet' 

class Mini < Parslet::Parser
  rule(:integer) { match('[0-9]').repeat(1) }
  root(:integer)
end

Mini.new.parse("132432")

That seemed to work ok.

[sogaiu]

Originally Posted by Randy11

with the "Rspec" gem.

Similarly:

gem install rspec

and trying the example via: https://relishapp.com/rspec/docs/gettingstarted worked (failure as expected, then make appropriate changes followed by success).

[sogaiu]

Originally Posted by Randy11

database with Sqlite and "sequel";

This one the pure gem route was not smooth, but there was a .deb:

gem install sequel
apt install ruby-sqlite3 # possibly a few other .debs too

The example at: https://github.com/jeremyevans/sequel#a-short-example worked.

[sogaiu]

Originally Posted by Randy11

Sinatra

Tried the .deb:

apt install ruby-sinatra

The example at: https://github.com/sinatra/sinatra#sinatra followed by accessing http://localhost:4567 worked fine

[sogaiu]

I didn't find an obvious choice for GUI, so I've punted on that one

[Randy11]

@Sogaiu :

Roughly, with a Max2 I can forget to take my netbook every time. Yes, it can't replace a computer, but when the aim is to study a book like Effective testing with Rspec-3, small power is enough. My old netbook is a ASUS EEE PC 1001px with only 2 cores and 2 GB of RAM. With an external keyboard, for occasional and small tests it will be sufficient.

For the GUI, the package for Debian is 'ruby-tcltk', but the 'gem' exists too.

A small example from A First (Real) Example :

require 'tk'
require 'tkextlib/tile'

root = TkRoot.new {title "Feet to Meters"}
content = Tk::Tile::Frame.new(root) {padding "3 3 12 12"}.grid( :sticky => 'nsew')
TkGrid.columnconfigure root, 0, :weight => 1; TkGrid.rowconfigure root, 0, :weight => 1

$feet = TkVariable.new; $meters = TkVariable.new
f = Tk::Tile::Entry.new(content) {width 7; textvariable $feet}.grid( :column => 2, :row => 1, :sticky => 'we' )
Tk::Tile::Label.new(content) {textvariable $meters}.grid( :column => 2, :row => 2, :sticky => 'we');
Tk::Tile::Button.new(content) {text 'Calculate'; command {calculate}}.grid( :column => 3, :row => 3, :sticky => 'w')

Tk::Tile::Label.new(content) {text 'feet'}.grid( :column => 3, :row => 1, :sticky => 'w')
Tk::Tile::Label.new(content) {text 'is equivalent to'}.grid( :column => 1, :row => 2, :sticky => 'e')
Tk::Tile::Label.new(content) {text 'meters'}.grid( :column => 3, :row => 2, :sticky => 'w')

TkWinfo.children(content).each {|w| TkGrid.configure w, :padx => 5, :pady => 5}
f.focus
root.bind("Return") {calculate}

def calculate
  begin
     $meters.value = (0.3048*$feet*10000.0).round()/10000.0
  rescue
     $meters.value = ''
  end
end

Tk.mainloop

[mdp]

Originally Posted by Randy11

Roughly, with a Max2 I can forget to take my netbook every time. Yes, it can't replace a computer, [...] My old netbook is a ASUS EEE PC 1001px

See, in theory it kind of could: the Max2 is 70% faster than the netbook you mention; it's in general faster than the common Atom z8350...

(BTW: I was thinking about you while posting in the other thread about SD-cards: have you solved the process at work? To do the assessments on the RPi, I used a small and comfortable USB-to-SD dongle...)

[Randy11]

Originally Posted by mdp

See, in theory it kind of could: the Max2 is 70% faster than the netbook you mention; it's in general faster than the common Atom z8350...

Yes, I'll try. An other interest : less weight

Originally Posted by mdp

(BTW: I was thinking about you while posting in the other thread about SD-cards: have you solved the process at work? To do the assessments on the RPi, I used a small and comfortable USB-to-SD dongle...)

At work : no. But with an OTG cable, a solution could be found, I hope. Yesterday I ordered this cable USB Female to Micro USB Male + USB Male OTG Host Cable . To use an USB key could be solution ... we'll see. I imagine something with a cell phone battery + the OTG cable attached to the MAX2 to use an USB key or SD-Card with a small adaptor as you propose.

[sogaiu]

Originally Posted by Randy11

For the GUI, the package for Debian is 'ruby-tcltk', but the 'gem' exists too.

A small example from A First (Real) Example

Thanks for that, I tried it and it worked fine here.

Thanks go to mdp for starting the thread and alcedo for mentioning the debian-on-termux link

[sogaiu]

Originally Posted by Randy11

Yesterday I ordered this cable USB Female to Micro USB Male + USB Male OTG Host Cable . To use an USB key could be solution ...

You probably know already, but please be careful to have a backup of your data before you test -- while testing, one of my filesystems got damaged / erased (though I had luck with using recovery for most of the data). I think this may have happened subsequent to instructing the Android system to unmount the partition / filesystem on the external media.

[Randy11]

Originally Posted by sogaiu

You probably know already, but please be careful to have a backup of your data before you test -- while testing, one of my filesystems got damaged / erased (though I had luck with using recovery for most of the data). I think this may have happened subsequent to instructing the Android system to unmount the partition / filesystem on the external media.

Thanks for the advice. Sorry to ask for clarification (some troubles with some sentences) but which filesystem 'Onyx Max2' or 'SD-Card' ?

I hope it's the 'SD-Card'.

[Randy11]

Originally Posted by Randy11

For the GUI, the package for Debian is 'ruby-tcltk', but the 'gem' exists too.

A small example from A First (Real) Example

Originally Posted by sogaiu

Thanks for that, I tried it and it worked fine here.

Very good news Thanks.