Difference between revisions of "Development"

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The C API is wrapped for Guile access with [http://www.swig.org/ SWIG]; Python wrappers can be created with a configure option.  
 
The C API is wrapped for Guile access with [http://www.swig.org/ SWIG]; Python wrappers can be created with a configure option.  
  
The GUI is built with [http://www.gtk GTK+] version 2.24.
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The GUI is built with [http://www.gtk.org GTK+] version 2.24.
  
The build system is [http://en.wikipedia.org/wiki/GNU_build_system GNU autotools]. Understanding this complex system isn't generally necessary for fixing simple bugs, but more complex work will. Here's an [http://www.sourceware.org/autobook/autobook/autobook_toc.html excellent tutorial].
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We're supporting two build systems [http://en.wikipedia.org/wiki/GNU_build_system GNU autotools] and [https://cmake.org CMake]. Understanding this complex system isn't generally necessary for fixing simple bugs, but more complex work will. Here's an [http://www.sourceware.org/autobook/autobook/autobook_toc.html excellent autotools tutorial] and a [https://cmake.org/cmake-tutorial/ short CMake one].
  
We use [http://www.stack.nl/~dimitri/doxygen DOxygen] to document the sources, including the C API. Details about our use are on the [[Doxygen]] wiki page. The ''Help Manual'' and ''Concepts Guide'' are formatted using [http://www.docbook.org/ DocBook], an SGML markup language which enables us to generate them in several formats. Note that these documents have a separate [https://github.com/Gnucash/gnucash-docs repository].
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We use [http://www.stack.nl/~dimitri/doxygen Doxygen] to document the sources, including the C API. Details about our use are on the [[Doxygen]] wiki page. The ''Help Manual'' and ''Concepts Guide'' are formatted using [http://www.docbook.org/ DocBook], an SGML markup language which enables us to publish them in several formats. Note that these documents have a separate [https://github.com/Gnucash/gnucash-docs repository].
 
 
The development team's plans for future work are outlined in the [[Roadmap]], and some other suggested enhancements may be found in the [[WishList]] as well as the many enhancements requested in [[Bugzilla]].  
 
  
 
== Object Orientation ==
 
== Object Orientation ==
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The next development cycle will include migrating those parts of Gnucash other than the GUI to [http://isocpp.org/ C++]; see our [[C++]] page for details and resources. We are deferring updating the GUI either to Gtk+-3 or some other framework for at least another development cycle.
 
The next development cycle will include migrating those parts of Gnucash other than the GUI to [http://isocpp.org/ C++]; see our [[C++]] page for details and resources. We are deferring updating the GUI either to Gtk+-3 or some other framework for at least another development cycle.
  
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= What We Need Help On =
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* Patches to fix [[Bugzilla|bugs]] are always a appreciated. It's an excellent way to get familiar with the code base and to introduce yourself to the team.
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* If you prefer to dive in at the deep end, have a look at the development team's [[Roadmap|long-term plans]].
 
= Preliminaries =
 
= Preliminaries =
 
Please subscribe to the [[Mailing Lists]] and introduce yourself to the development team. Some of the team also hang out on [[IRC]] so you can interact more directly.
 
Please subscribe to the [[Mailing Lists]] and introduce yourself to the development team. Some of the team also hang out on [[IRC]] so you can interact more directly.
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= Getting Sources and Building =
 
= Getting Sources and Building =
We are in the last stage of converting source code version control from  [http://subversion.tigris.org/ Subversion] to [http://git-scm.com/ Git], which we intend to complete shortly after releasing GnuCash version 2.6 at the end of 2013. New contributors should follow the git [[Git|instructions]] for cloning the repository and preparing patches. Any current developers still using subversion should switch to git for most of their work as soon as possible in order to be ready for the final conversion.
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You can follow the git [[Git|instructions]] for cloning the repository and preparing patches.
  
 
Build instructions for various platforms are described or linked at [[Building]].
 
Build instructions for various platforms are described or linked at [[Building]].
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* Please try to develop according to [http://en.wikipedia.org/wiki/Test-driven_development Test Driven Development] principles, following our [[Testing]] guidelines.
 
* Please try to develop according to [http://en.wikipedia.org/wiki/Test-driven_development Test Driven Development] principles, following our [[Testing]] guidelines.
 
* Please follow our [[CodingStandard| coding style]].
 
* Please follow our [[CodingStandard| coding style]].
* If your code will contain '''textual output for the user''', have a look at [[Translation#Tips_for_Developers | Translation: Tips for Developers]].
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* If your code will contain '''textual output for the user''', have a look at [[Translation#Tips_for_Developers | Translation: Tips for Developers]] and configuration [[Settings Wording]].
 
* Be sure that <tt>make check</tt> passes before preparing your patch or pushing your commit.
 
* Be sure that <tt>make check</tt> passes before preparing your patch or pushing your commit.
  
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* Make sure that global (i.e. not static) functions are documented with [[Doxygen]]-formatted comments.  
 
* Make sure that global (i.e. not static) functions are documented with [[Doxygen]]-formatted comments.  
 
* Try to keep the ''README files'' and that in ''src/doc'' up to date.
 
* Try to keep the ''README files'' and that in ''src/doc'' up to date.
* [[Document Update Instructions|Update]] the relevant sections in ''Help Manual'' and the [[Concept Guide]].
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* [[Documentation Update Instructions|Update]] the relevant sections in ''Help Manual'' and the [[Concept Guide]].
  
 
= Submitting Patches =
 
= Submitting Patches =
  
Once you have your changes written and well tested&mdash;<tt>make check</tt> will run a bunch of tests&mdash;you'll want to submit it so that someone with commit privilege can add it to the official sources. First, [[Git#Patches|make a patch]].
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Once you have your changes written and well tested&mdash;<tt>make check</tt> will run a bunch of tests&mdash;you'll want to submit it so that someone with commit privilege can add it to the official sources. There are two ways we accept code:
 
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If there's already a bug about it in [[Bugzilla]], just attach the patch to the bug. Be sure to check the "patch" checkbox on the attachment form. If there isn't a bug already (be sure to search!), it really works best if you create a new one to attach your patch to.
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# [[Git#Pull_Requests|Github pull requests]]: This is the preferred method if the change is non-trivial.
* Describe the problem or improvement that your patch addresses in the initial comment.
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#* If there is already a [[Bugzilla|bug report]] on the matter be sure to include a link to the bug in the pull request and comment on the bug with a link to the pull request.
* Open the bug ''before'' you make your patch so that you can include the bug number in the commit message.
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# Attach a patch to a [[Bugzilla|bug report]]:
 
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:* [[Git#Patches|Make a patch]].
If there isn't a bug already and the patch is trivial, you can send it to the '''gnucash-devel''' mailing list (though we really do prefer patches to go to [[Bugzilla]] because on the mailing list they are too easy forgotten). Please attach the patch to the email, don't inline it in the message, even if you used git format-patch and it made a pretty email for you.
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:* If there's already a bug about it in [[Bugzilla]], just attach the patch to the bug. Be sure to check the "patch" checkbox on the attachment form.  
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:* If there isn't a bug already (be sure to search!), you'll need to create a new one to attach your patch to:
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:** Describe the problem or improvement that your patch addresses in the initial comment.
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:** Open the bug ''before'' you commit your changes so that you can include the bug number in the commit message.
  
 
= Tools =
 
= Tools =
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* Some are using [http://qt-project.org/wiki/Category:Tools::QtCreator QtCreator].
 
* Some are using [http://qt-project.org/wiki/Category:Tools::QtCreator QtCreator].
  
For the GTK GUI
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For the GTK GUI:
 
* [https://glade.gnome.org/ glade]
 
* [https://glade.gnome.org/ glade]
  
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[[C API]]
 
[[C API]]
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[[Category:Development]]

Revision as of 13:26, 8 November 2016

Overview

GnuCash is written principally in C. A Guile interpreter is built in and parts of Gnucash--principally reports, but also parts of the user configuration, file import, and other small parts--are in Scheme. The C API is wrapped for Guile access with SWIG; Python wrappers can be created with a configure option.

The GUI is built with GTK+ version 2.24.

We're supporting two build systems GNU autotools and CMake. Understanding this complex system isn't generally necessary for fixing simple bugs, but more complex work will. Here's an excellent autotools tutorial and a short CMake one.

We use Doxygen to document the sources, including the C API. Details about our use are on the Doxygen wiki page. The Help Manual and Concepts Guide are formatted using DocBook, an SGML markup language which enables us to publish them in several formats. Note that these documents have a separate repository.

Object Orientation

Most of the code is written in an object-oriented style. Some of it uses GObject, some uses a home-grown GObject-like system called QofObject, and some just does what GObject does in straight C. Understanding how to use that is an important skill to developing for GnuCash. The next development cycle will include migrating those parts of Gnucash other than the GUI to C++; see our C++ page for details and resources. We are deferring updating the GUI either to Gtk+-3 or some other framework for at least another development cycle.

What We Need Help On

  • Patches to fix bugs are always a appreciated. It's an excellent way to get familiar with the code base and to introduce yourself to the team.
  • If you prefer to dive in at the deep end, have a look at the development team's long-term plans.

Preliminaries

Please subscribe to the Mailing Lists and introduce yourself to the development team. Some of the team also hang out on IRC so you can interact more directly.

Read the two files HACKING and README.svn

Look through the API documentation.

Getting Sources and Building

You can follow the git instructions for cloning the repository and preparing patches.

Build instructions for various platforms are described or linked at Building.

Coding Guidelines

Documentation

If your code adds or changes some functionality, do not forget the documentation.

  • Make sure that global (i.e. not static) functions are documented with Doxygen-formatted comments.
  • Try to keep the README files and that in src/doc up to date.
  • Update the relevant sections in Help Manual and the Concept Guide.

Submitting Patches

Once you have your changes written and well tested—make check will run a bunch of tests—you'll want to submit it so that someone with commit privilege can add it to the official sources. There are two ways we accept code:

  1. Github pull requests: This is the preferred method if the change is non-trivial.
    • If there is already a bug report on the matter be sure to include a link to the bug in the pull request and comment on the bug with a link to the pull request.
  2. Attach a patch to a bug report:
  • Make a patch.
  • If there's already a bug about it in Bugzilla, just attach the patch to the bug. Be sure to check the "patch" checkbox on the attachment form.
  • If there isn't a bug already (be sure to search!), you'll need to create a new one to attach your patch to:
    • Describe the problem or improvement that your patch addresses in the initial comment.
    • Open the bug before you commit your changes so that you can include the bug number in the commit message.

Tools

Text editors / IDE:

  • Most developers seem to have used Emacs as IDE.
  • Additionally there are some experiences with Eclipse.
  • Some are using QtCreator.

For the GTK GUI:

Some may be interested in our experiments with CMake and Qt: Cutecash.

See also

An informative mail from the archives.

GnuCash design and developer's reference

Scheme programming manual

C API