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| author |   Bill Traynor <wmat@alphatroop.com> | 2013-04-15 20:47:14 -0400 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-01-13 22:00:27 +0000 |
| commit | 313712c8db8c070f16344a357d71bb02a9d3e789 (patch) | |
| tree | 7255b4d520d707471303dc3444f4151f54276821 | |
| parent | 5f80311d73e45cfed035e7e52c5ca24bc896a82c (diff) | |
| download | bitbake-313712c8db8c070f16344a357d71bb02a9d3e789.tar.gz | |
user-manual-metadata: Updated the Tasks section.
Update the Tasks section with information provided through
feedback.
Signed-off-by: Bill Traynor <wmat@alphatroop.com>
| -rw-r--r-- | doc/user-manual/user-manual-metadata.xml | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/doc/user-manual/user-manual-metadata.xml b/doc/user-manual/user-manual-metadata.xml index ce3517cf4..d2d20fe7a 100644 --- a/doc/user-manual/user-manual-metadata.xml +++ b/doc/user-manual/user-manual-metadata.xml @@ -549,23 +549,28 @@ need to import them.</para> <emphasis>NOTE:</emphasis> This is only supported in .bb and .bbclass files. </para> - <para>In BitBake, each step that needs to be run for a given .bb is - known as a task. - There is a command <literal>addtask</literal> to add new - tasks (must be a defined Python executable metadata and must - start with <quote>do_</quote>) and describe intertask - dependencies. + <para>A shell or python function executable through exec_func can be promoted + to become a task. + Tasks are the execution unit Bitbake uses and each step that needs to be run + for a given .bb is known as a task. + There is a addtask command to add new tasks and promote functions which by + convention must start with “do_”. + The addtask command is also used to describe intertask dependencies. </para> <para> - <screen>python do_printdate () { import time print - time.strftime('%Y%m%d', time.gmtime()) } addtask printdate - before do_build + <screen> + python do_printdate () { + import time print + time.strftime('%Y%m%d', time.gmtime()) + } + addtask printdate after do_fetch before do_build </screen> </para> - <para>This defines the necessary Python function and adds it as a task - which is now a dependency of do_build, the default task. - If anyone executes the do_build task, that will result in - do_printdate being run first. + <para>The above example defined a python function, then adds it as a task + which is now a dependency of do_build, the default task and states it + has to happen after do_fetch. + If anyone executes the do_build task, that will result in do_printdate + being run first. </para> </section> |