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5.3.1 Gambas - Console

This chapter is preceded by the following considerations:

  • The Gambas project' gui_gnuplot' was created, developed and tested in the Gambas IDE.
  • Then another developer took over the sample project' gui_gnuplot'. The project folder is $HOME/gui_gnuplot.
  • After the first tests the source code was changed in a suitable editor like' BlueFish'.
  • Then the modified project - without using the Gambas IDE - will be tested until all requirements of the specification are sufficiently fulfilled.

After every change to the source code, the program must first be recompiled for a program test, then an executable program file must be generated, and then the program must be restarted. The necessary programs compiler, archiver and interpreter have already been introduced in chapters 5.0.1 and 5.0.2. Use of compiler

To compile the sample project, the following commands are alternatively executed in the console:

Syntax:	gbc3 [optionen] [<projekt-verzeichnis>] 
hans@linux:~$ gbc3 $HOME/gui_gnuplot 
hans@linux:~$ gbc3 –all $HOME/gui_gnuplot 
hans@linux:~$ gbc3 -ag $HOME/gui_gnuplot 
hans@linux:~$ cd $HOME/gui_gnuplot 
hans@linux:~/gui_gnuplot$ gbc3 --all 
hans@linux:~$ gbc3 -agv $HOME/gui_gnuplot # Umfangreiche Kommentare und Informationen
hans@linux:~$ gbc3 -agv $HOME/gui_gnuplot > gui_gnuplot.log

If the compilation was successful, OK is returned as a confirmation and there is a new hidden folder. gambas in the project folder or the content is overwritten. This folder contains files with the file names of the files in the. src folder - here FMAIN and MTERMINAL (in capital letters).

If an error occurs during compilation, a note is displayed with a reference to the line in which the error occurred:

hans@linux:~$ gbc3 -ag $HOME/gui_gnuplot 
FMain.class:58: error: Unknown identifier: En 

Here it was a simple clerical error: En dif instead of Endif. Even in case of an error, a hidden - but empty - folder . gambas is created in the project folder. This is not critical, since the contents of the folder are overwritten during a further, error-free compilation run. Use of Archiver

Only if the project has been compiled successfully, the executable file gui_gnuplot. gambas or an update will be created in a further step by the program Archiver in the project folder.

Syntax:	gba3 [optionen] [<projekt-verzeichnis>]

No acknowledgement is issued if the generation of the executable file was successful. The executable file (archive file) is given the project name (default) and file extension gambas. These commands generate an executable file:

hans@linux:~$ gba3 $HOME/gui_gnuplot
hans@linux:~$ cd $HOME/gui_gnuplot # Alternative 
hans@linux:~/gui_gnuplot$ gba3
Wenn Sie der ausführbaren Datei einen anderen Dateinamen geben wollen, dann müssen Sie folgende Synatx benutzen:
hans@linux:~$ gba --output=ZIEL QUELLE 
hans@linux:~$ gba3 --output=$HOME/gui_gnuplot/gnuplot44.gambas $HOME/gui_gnuplot 
hans@linux:~$ gba3 -o $HOME/gui_gnuplot/gnuplot44.gambas $HOME/gui_gnuplot 
hans@linux:~$ cd $HOME/gui_gnuplot # Alternative 
hans@linux:~/gui_gnuplot$ gba3 -o $HOME/gui_gnuplot/gnuplot44.gambas 


If you set the -x option, you can display the contents of selected files in the Gambas archive - if the file exists in the Gambas archive:

Syntax:	gba3 -x <archiv-pfad> <datei>

This call was successful:

hans@linux:~$ gba3 -x  $HOME/gui_gnuplot/gui_gnuplot.gambas .project 
# Gambas Project File 3.0 
# Compiled with Gambas 3.3.4 
Title=GnuPlot & Process 
Authors="Dr. Hans Lehmann ~ Osterburg ~ 2014" 
Auch in diesem Fall ist das Ergebnis eindeutig:
hans@linux:~$ gba3 -x $HOME/gui_gnuplot/gui_gnuplot.gambas .settings 
gba: file not found in archive 
hans@linux:~$ Use of interpreter

To execute the file projektname. gambas or neu_name. gambas you need the interpreter gbx3, which must be installed on the system. The archive file is marked as a script with the' Magic Header' #! /usr/bin/gbr3' and shows Linux how to execute the script. Linux executes the script by calling the interpreter specified in the header:

Syntax:	gbx3 [optionen] [<projekt-datei>] [--<argumentliste: arg_1 arg_2 … arg_k>]

By default, gui_gnuplot. gambas is searched for and - if available - started by the interpreter; otherwise the path to the archive file must be specified and the symbolic link to the interpreter must be used:

hans@linux:~$ gbx3 $HOME/gui_gnuplot ' Standard projektname.gambas
hans@linux:~$ gbr3 $HOME/gui_gnuplot/gnuplot44.gambas ' Geänderter Name der Archiv-Datei

A separate chapter is dedicated to starting gambas programs with parameters: 5.3.3' Programs with parameters'. Use of compiler, archiver and interpreter

Here you can find the Compile, Archive and Interpret actions for the sample project in the $HOME/gui_gnuplot directory in a tried and tested summary:

hans@linux:~$ gbc3 -ag $HOME/gui_gnuplot 
hans@linux:~$ gba3 $HOME/gui_gnuplot
hans@linux:~$ gbx3 $HOME/gui_gnuplot

The result is impressive:


Figure GUI for the console program' gnuplot'.


Figure The console program' gnuplot' in action




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k5/k5.3/k5.3.1/start.txt · Last modified: 04.01.2019 by honsek

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