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1# Copyright (C) 2012 Linux Foundation
2# Author: Richard Purdie
3# Some code and influence taken from srctree.bbclass:
4# Copyright (C) 2009 Chris Larson <clarson@kergoth.com>
5# Released under the MIT license (see COPYING.MIT for the terms)
6#
7# externalsrc.bbclass enables use of an existing source tree, usually external to
8# the build system to build a piece of software rather than the usual fetch/unpack/patch
9# process.
10#
11# To use, add externalsrc to the global inherit and set EXTERNALSRC to point at the
12# directory you want to use containing the sources e.g. from local.conf for a recipe
13# called "myrecipe" you would do:
14#
15# INHERIT += "externalsrc"
16# EXTERNALSRC_pn-myrecipe = "/path/to/my/source/tree"
17#
18# In order to make this class work for both target and native versions (or with
19# multilibs/cross or other BBCLASSEXTEND variants), B is set to point to a separate
20# directory under the work directory (split source and build directories). This is
21# the default, but the build directory can be set to the source directory if
22# circumstances dictate by setting EXTERNALSRC_BUILD to the same value, e.g.:
23#
24# EXTERNALSRC_BUILD_pn-myrecipe = "/path/to/my/source/tree"
25#
26
27SRCTREECOVEREDTASKS ?= "do_patch do_unpack do_fetch"
28
29python () {
30 externalsrc = d.getVar('EXTERNALSRC', True)
31 if externalsrc:
32 d.setVar('S', externalsrc)
33 externalsrcbuild = d.getVar('EXTERNALSRC_BUILD', True)
34 if externalsrcbuild:
35 d.setVar('B', externalsrcbuild)
36 else:
37 d.setVar('B', '${WORKDIR}/${BPN}-${PV}/')
38 d.setVar('SRC_URI', '')
39
40 tasks = filter(lambda k: d.getVarFlag(k, "task"), d.keys())
41
42 for task in tasks:
43 if task.endswith("_setscene"):
44 # sstate is never going to work for external source trees, disable it
45 bb.build.deltask(task, d)
46 else:
47 # Since configure will likely touch ${S}, ensure only we lock so one task has access at a time
48 d.appendVarFlag(task, "lockfiles", "${S}/singletask.lock")
49
50 for task in d.getVar("SRCTREECOVEREDTASKS", True).split():
51 bb.build.deltask(task, d)
52}
53