mutter/HACKING
Emmanuele Bassi a83a5d5593 [docs] Document the commit message format
Clutter uses the standard git format for commit messages:

        short description
        <newline>
        long description...

And everyone asking for their patches or trees to be merged upstream
should conform to the same commit messages format, just like they
should conform to the coding style.
2009-03-11 14:01:55 +00:00

112 lines
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GENERAL
=======
General notes and rules on clutter core hacking;
- Follow the CODING_STYLE document.
- All non static public API funcs should be documented in the source files
via gtk-doc. Structures, enumerations and macros should be documented in
the header files.
- All non-trivial static and private API should be documented, especially
the eventual lifetime handling of the arguments/return values or locking
of mutexes.
- All public functions with float parameters should also provide a fixed
point version, with the 'x' postfix to the function name, e.g.:
clutter_actor_set_foo - floating point
clutter_actor_set_foox - fixed point
Fixed point should be always be used internally, except when precision
is paramount.
- All public functions dealing with pixels should also provide a
ClutterUnit version, with the 'u' postfix to the function name, e.g:
clutter_actor_set_bar - pixels
clutter_actor_set_baru - units
ClutterUnit should always be used internally.
- Properties should always be in floating point (never fixed point).
The preferred precision is double.
- Properties should use pixels whenever is possible. If sub-pixel
precision is fundamental, use ClutterParamSpecUnit and
clutter_param_spec_unit() to install ClutterUnit properties, and
clutter_value_set_unit()/clutter_value_get_unit() to handle GValues in
a safe way. Never install a ClutterUnit property using a GParamSpecInt.
- Public entry points must always check their arguments with
g_return_if_fail() or g_return_val_if_fail().
- Private entry points should use g_assert() to verify internal state;
do not use g_return_if_fail()/g_return_val_if_fail() as they might
be compiled out.
- Really try to avoid if possible additions to clutter-private.h. Use
accessor functions instead.
- Don't add direct GL calls but wrap with cogl (also adding GLES
version if possible, or at least a stub).
- Use CLUTTER_NOTE() macro for debug statements.
- New features should also include an exhaustive test unit under
tests/conform and, eventually, a user-interactive tes under
tests/interactive.
- When committing, use the standard git commit message format:
short description - MUST be less than 74 characters
<newline> - MANDATORY empty line
long description - Each line must be less than 80 characters
Do NOT put the commit message on the short description line.
One line commit messages should be avoided, unless they can be
*fully* explained in less than 70 characters (e.g. "Fix typo in
clutter_actor_create_pango_context() docs"). Think of the commit
message as an email sent to the maintainers explaining "what" you
did and, more importantly, "why" you did it. The "how" is not
important, since "git show" will show the patch inlined with the
commit message.
RELEASES
========
In making a new release;
- Check out a fresh copy from SVN.
- Verify versioning in configure.ac, increasing relevant
clutter_major_version/clutter_minor_version/clutter_micro_version
value. For point releases, bump clutter_micro_version to the next
even number.
- If there was no API change (addition, removal), increment
clutter_interface_age by two. If there was an API change,
set clutter_interface_age to zero. The interface_age is used to
keep the soname the same.
- Update NEWS (New feature details, bug #'s), README (Any API changes
relevant to developers + version), AUTHORS if relevant.
- Add a Release entry to the ChangeLog noting version.
- Call make distcheck and fix if fails.
- Upload the tarball.
- Bump clutter_micro_version to the next odd number version.
- Commit.
- Announce release to waiting world on blog and mailing list.
- Release any dependant add-ons following similar rules to above.
Dont forget to check *.pc file version deps!
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