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# Copyright (C) 2012 Linux Foundation
# Author: Richard Purdie
# Some code and influence taken from srctree.bbclass:
# Copyright (C) 2009 Chris Larson <clarson@kergoth.com>
# Released under the MIT license (see COPYING.MIT for the terms)
#
# externalsrc.bbclass enables use of an existing source tree, usually external to
# the build system to build a piece of software rather than the usual fetch/unpack/patch
# process.
#
# To use, add externalsrc to the global inherit and set EXTERNALSRC to point at the
# directory you want to use containing the sources e.g. from local.conf for a recipe
# called "myrecipe" you would do:
#
# INHERIT += "externalsrc"
# EXTERNALSRC_pn-myrecipe = "/path/to/my/source/tree"
#
# In order to make this class work for both target and native versions (or with
# multilibs/cross or other BBCLASSEXTEND variants), B is set to point to a separate
# directory under the work directory (split source and build directories). This is
# the default, but the build directory can be set to the source directory if
# circumstances dictate by setting EXTERNALSRC_BUILD to the same value, e.g.:
#
# EXTERNALSRC_BUILD_pn-myrecipe = "/path/to/my/source/tree"
#
SRCTREECOVEREDTASKS ?= "do_patch do_unpack do_fetch"
python () {
externalsrc = d.getVar('EXTERNALSRC', True)
if externalsrc:
d.setVar('S', externalsrc)
externalsrcbuild = d.getVar('EXTERNALSRC_BUILD', True)
if externalsrcbuild:
d.setVar('B', externalsrcbuild)
else:
d.setVar('B', '${WORKDIR}/${BPN}-${PV}/')
d.setVar('SRC_URI', '')
if '{SRCPV}' in d.getVar('PV', False):
# Dummy value because the default function can't be called with blank SRC_URI
d.setVar('SRCPV', '999')
tasks = filter(lambda k: d.getVarFlag(k, "task"), d.keys())
for task in tasks:
if task.endswith("_setscene"):
# sstate is never going to work for external source trees, disable it
bb.build.deltask(task, d)
else:
# Since configure will likely touch ${S}, ensure only we lock so one task has access at a time
d.appendVarFlag(task, "lockfiles", "${S}/singletask.lock")
# We do not want our source to be wiped out, ever (kernel.bbclass does this for do_clean)
cleandirs = d.getVarFlag(task, 'cleandirs', False)
if cleandirs:
cleandirs = cleandirs.split()
setvalue = False
if '${S}' in cleandirs:
cleandirs.remove('${S}')
setvalue = True
if externalsrcbuild == externalsrc and '${B}' in cleandirs:
cleandirs.remove('${B}')
setvalue = True
if setvalue:
d.setVarFlag(task, 'cleandirs', ' '.join(cleandirs))
for task in d.getVar("SRCTREECOVEREDTASKS", True).split():
bb.build.deltask(task, d)
d.prependVarFlag('do_compile', 'prefuncs', "externalsrc_compile_prefunc ")
# Ensure compilation happens every time
d.setVarFlag('do_compile', 'nostamp', '1')
}
python externalsrc_compile_prefunc() {
# Make it obvious that this is happening, since forgetting about it could lead to much confusion
bb.warn('Compiling %s from external source %s' % (d.getVar('PN', True), d.getVar('EXTERNALSRC', True)))
}
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