174 lines
5.2 KiB
Text
Executable file
174 lines
5.2 KiB
Text
Executable file
// Copyright 2019-2020 Rene Rivera
|
|
// Copyright 2003, 2006 Vladimir Prus
|
|
// Distributed under the Boost Software License, Version 1.0.
|
|
// (See accompanying file LICENSE.txt or https://www.bfgroup.xyz/b2/LICENSE.txt)
|
|
|
|
= B2 contributor guidelines
|
|
|
|
B2 is an open-source project. This means that we welcome and appreciate
|
|
all contributions -- be it ideas, bug reports, or patches. This document
|
|
contains guidelines which helps to assure that development goes on smoothly, and
|
|
changes are made quickly.
|
|
|
|
The guidelines are not mandatory, and you can decide for yourself which one to
|
|
follow. But note, the 10 mins that you spare writing a comment, for example,
|
|
might lead to significantly longer delay for everyone.
|
|
|
|
== Additional resources include
|
|
|
|
=== The issue tracker
|
|
|
|
https://github.com/bfgroup/b2/issues
|
|
|
|
=== Discussion forums
|
|
|
|
https://github.com/bfgroup/b2/discussions
|
|
|
|
== BUGS and PATCHES
|
|
|
|
Both bugs and patches can be submitted to the GitHub tracker.
|
|
|
|
When reporting a bug, please try to provide the following information:
|
|
|
|
* What you did.
|
|
* A minimal reproducible test case is very much appreciated.
|
|
* Shell script with some annotations is much better than verbose
|
|
description of the problem.
|
|
* A regression test is the best (see test/test_system.html).
|
|
|
|
* What you got.
|
|
|
|
* What you expected.
|
|
|
|
* What version of B2 did you use. If possible, please try to test with the
|
|
main branch state.
|
|
|
|
When submitting a patch, please:
|
|
|
|
* Make a single patch for a single logical change
|
|
* Follow the policies and coding conventions below
|
|
* Send patches as pull requests to the main branch
|
|
* Provide a good PR message together with the patch
|
|
|
|
The purpose of message serves to communicate what was changed, and *why*.
|
|
Without a good message, you might spend a lot of time later, wondering where
|
|
a strange piece of code came from and why it was necessary.
|
|
|
|
The good message mentions each changed file and each rule/method, saying
|
|
what happened to it, and why. Consider, the following log message
|
|
|
|
----
|
|
Better direct request handling.
|
|
|
|
* new/build-request.jam
|
|
(directly-requested-properties-adjuster): Redo.
|
|
|
|
* new/targets.jam
|
|
(main-target.generate-really): Adjust properties here.
|
|
|
|
* new/virtual-target.jam
|
|
(register-actual-name): New rule.
|
|
(virtual-target.actualize-no-scanner): Call the above, to detected bugs,
|
|
where two virtual target correspond to one Jam target name.
|
|
----
|
|
|
|
The messages for the last two files are good. They tell what was changed.
|
|
The change to the first file is clearly under-commented.
|
|
|
|
It's okay to use terse messages for uninteresting changes, like ones induced
|
|
by interface changes elsewhere.
|
|
|
|
== POLICIES
|
|
|
|
=== Testing
|
|
|
|
All serious changes must be tested. New rules must be tested by the module where
|
|
they are declared. The test system (link:test/test_system.html[test/test_system.html])
|
|
should be used to verify user-observable behavior.
|
|
|
|
=== Documentation
|
|
|
|
It turns out that it's hard to have too much comments, but it's easy to have too
|
|
little. Please prepend each rule with a comment saying what the rule does and
|
|
what arguments mean. Stop for a minute and consider if the comment makes sense
|
|
for anybody else, and completely describes what the rules does. Generic phrases
|
|
like "adjusts properties" are really not enough.
|
|
|
|
When applicable, make changes to the user documentation as well.
|
|
|
|
== CODING CONVENTIONS
|
|
|
|
1. All names of rules and variables are lowercase with "-" to separate
|
|
words.
|
|
+
|
|
----
|
|
rule call-me-ishmael ( ) ...
|
|
----
|
|
|
|
2. Names with dots in them are "intended globals". Ordinary globals use a
|
|
dot prefix:
|
|
+
|
|
----
|
|
.foobar
|
|
$(.foobar)
|
|
----
|
|
|
|
3. Pseudofunctions or associations are <parameter>.<property>:
|
|
+
|
|
----
|
|
$(argument).name = hello ;
|
|
$($(argument).name)
|
|
----
|
|
|
|
4. Class attribute names are prefixed with "self.":
|
|
+
|
|
----
|
|
self.x
|
|
$(self.x)
|
|
----
|
|
|
|
5. Builtin rules are called via their ALL_UPPERCASE_NAMES:
|
|
+
|
|
----
|
|
DEPENDS $(target) : $(sources) ;
|
|
----
|
|
|
|
6. Opening and closing braces go on separate lines:
|
|
+
|
|
----
|
|
if $(a)
|
|
{
|
|
#
|
|
}
|
|
else
|
|
{
|
|
#
|
|
}
|
|
----
|
|
|
|
== ENGINE
|
|
|
|
Developing in the `b2` engine, the C++ part, requires two steps to be
|
|
effective: building the "stable" engine, and developing the
|
|
"in-progress" engine.
|
|
|
|
What is the "stable" engine is up to you. It only refers to a build of the
|
|
engine you know is at a good working state. When you are at a point the
|
|
source is stable you can run `bootstrap.sh/bat` from the root. That will
|
|
create the `b2` executable at the root. You can then use this version to run
|
|
regular B2 builds as needed both within the B2 tree and in other projects.
|
|
|
|
The "in-progress" engine is whatever build you happen to be testing at the
|
|
moment. There are two ways to build this be engine. You can either
|
|
(a) run `b2 b2` at the root, or (b) run `build.sh/bat` in `src/engine`.
|
|
|
|
Using (a) will place, by default, a fully debuggable `b2` in the `.build`
|
|
directories. You can run that one from a debugger with full symbols and
|
|
stepping features. This should be the first choice in developing in the
|
|
engine.
|
|
|
|
After using (a) to implement functionality you can use (b) to fully test
|
|
that functionality. The engine built from (b) is fully optimized and
|
|
is the one used, by default, by the test system when running in the `test`
|
|
directory. Before submitting patches it's required to build this way and
|
|
run the tests in at least one toolset version (but preferably at least two).
|