[Pharo-users] CommandLineHandler surprises

Jimmie Houchin jlhouchin at gmail.com
Wed Jan 27 16:56:44 EST 2016

Yes, I did not express myself well. What I am meaning is that I do not 
expect to have a UI window for the image pop-up. But it does, every time.

The difference that I can find is that I have been downloading VMs from

These VMs have only a "pharo" and not a "pharo-ui". So ./pharo always 
opens an image in a UI window.

When I do
wget -O- get.pharo.org/stable+vm | bash

Then it generates a pharo and a pharo-ui script.

This is probably the problem that I am having is that the manual 
downloads from the website are not like the zeroconf scripts and so 
there are no explicit UI and Headless scripts.

These zeroconf VMs with their differing scripts do exactly as 
advertised. Are the generated scripts different for different Linux 
distros? Is there a reason for the zipped downloads on the website to 
not include them?

I tried the "get" handler and had it install XMLParser. Very nice.

Thanks and Shalom Aleichem.


On 01/27/2016 01:21 PM, Sven Van Caekenberghe wrote:
> Jimmie,
> Of course it opens an image, else nothing would work ;-)
> I suspect you mean it opens a UI ?
> That should not happen, it depends on what your ./pharo actually is or does.
> In any case, rest assured, using it on the command line works perfectly.
> On the first Linux server that I log in to:
> $ cat ~/pharo/bin/pharo
> #!/usr/bin/env bash
> # some magic to find out the real location of this script dealing with symlinks
> DIR=`readlink "$0"` || DIR="$0";
> DIR=`dirname "$DIR"`;
> cd "$DIR"
> DIR=`pwd`
> cd - > /dev/null
> # disable parameter expansion to forward all arguments unprocessed to the VM
> set -f
> # run the VM and pass along all arguments as is
> "$DIR"/"pharo-vm/pharo" --nodisplay  "$@"
> $ ~/pharo/bin/pharo ~/pharo/build/Pharo.image --list
> Currently installed Command Line Handlers:
>      Fuel            Loads fuel files
>      config          Install and inspect Metacello Configurations from the command line
>      save            Rename the image and changes file
>      update          Load updates
>      printVersion    Print image version
>      st              Loads and executes .st source files
>      test            A command line test runner
>      clean           Run image cleanup
>      eval            Directly evaluates passed in one line scripts
> $ ~/pharo/bin/pharo ~/pharo/build/Pharo.image eval '123 factorial'
> 12146304367025329675766243241881295855454217088483382315328918161829235892362167668831156960612640202170735835221294047782591091570411651472186029519906261646730733907419814952960000000000000000000000000000
> Sven
>> On 27 Jan 2016, at 19:59, Jimmie Houchin <jlhouchin at gmail.com> wrote:
>> Hello,
>> I am reading the Deep Into Pharo book. I have been playing with the CommandLineHandler. I have been surprised by some of its behavior. Though I have used Pharo a long time. I have not played with it from the command line. I am a very long time Linux user and am very comfortable on the command line.
>> When according to the book I execute:
>> ./pharo Pharo.image --list
>> It will provide me with a list of the available handlers.
>> I did not expect it to open up an image for me. That is not what I expected or wanted. I did not intend to use an image at this time. I am on the command line and expecting to see results there. Not for a new window to pop up.
>> As of yet I have always opened up Pharo on the command line. I have yet to use PharoLauncher, but do intend to do so soon. So I am comfortable with  Pharo opening up a new window and image from the command line.
>> However it is very unintuitive and seemingly unnecessary to open up an image for these command line handlers. I naively think they should simply return the results. Now if that requires opening a headless image for a moment and close, then fine.
>> --list
>> --help
>> --version
>> --copyright
>> eval
>> printVersion
>> Some other handlers I do not know if opening an image is the correct default. I have not spent the time learning them yet.
>> Thanks.  Shalom Aleichem.
>> Jimmie

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