116 lines
4.0 KiB
Plaintext
116 lines
4.0 KiB
Plaintext
# This class is used to help the alternatives system which is useful when
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# multiple sources provide same command. You can use update-alternatives
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# command directly in your recipe, but in most cases this class simplifies
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# that job.
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#
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# There're two basic modes supported: 'single update' and 'batch update'
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#
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# 'single update' is used for a single alternative command, and you're
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# expected to provide at least below keywords:
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#
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# ALTERNATIVE_NAME - the name that the alternative is registered
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# ALTERNATIVE_PATH - the path of installed alternative
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#
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# ALTENATIVE_PRIORITY and ALTERNATIVE_LINK are optional which have defautls
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# in this class.
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#
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# 'batch update' is used if you have multiple alternatives to be updated.
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# Unlike 'single update', 'batch update' in most times only require two
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# parameter:
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#
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# ALTERNATIVE_LINKS - a list of symbol links for which you'd like to
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# create alternatives, with space as delimiter, e.g:
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#
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# ALTERNATIVE_LINKS = "${bindir}/cmd1 ${sbindir}/cmd2 ..."
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#
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# ALTNERATIVE_PRIORITY - optional, applies to all
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#
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# To simplify the design, this class has the assumption that for a name
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# listed in ALTERNATIVE_LINKS, say /path/cmd:
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#
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# the name of the alternative would be: cmd
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# the path of installed alternative would be: /path/cmd.${PN}
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# ${D}/path/cmd will be renamed to ${D}/path/cmd.{PN} automatically
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# priority will be the same from ALTERNATIVE_PRIORITY
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#
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# If above assumption breaks your requirement, then you still need to use
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# your own update-alternatives command directly.
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# defaults
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ALTERNATIVE_PRIORITY = "10"
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ALTERNATIVE_LINK = "${bindir}/${ALTERNATIVE_NAME}"
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update_alternatives_postinst() {
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update-alternatives --install ${ALTERNATIVE_LINK} ${ALTERNATIVE_NAME} ${ALTERNATIVE_PATH} ${ALTERNATIVE_PRIORITY}
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}
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update_alternatives_postrm() {
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update-alternatives --remove ${ALTERNATIVE_NAME} ${ALTERNATIVE_PATH}
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}
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# for batch alternatives, we use a simple approach to require only one parameter
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# with the rest info deduced implicitly
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update_alternatives_batch_postinst() {
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for link in ${ALTERNATIVE_LINKS}
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do
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name=`basename ${link}`
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path=${link}.${PN}
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update-alternatives --install ${link} ${name} ${path} ${ALTERNATIVE_PRIORITY}
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done
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}
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update_alternatives_batch_postrm() {
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for link in ${ALTERNATIVE_LINKS}
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do
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name=`basename ${link}`
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path=${link}.${PN}
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update-alternatives --remove ${name} $path
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done
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}
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update_alternatives_batch_doinstall() {
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if [ "${PN}" = "${BPN}" ] ; then
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for link in ${ALTERNATIVE_LINKS}
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do
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mv ${D}${link} ${D}${link}.${PN}
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done
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fi
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}
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def update_alternatives_after_parse(d):
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if d.getVar('ALTERNATIVE_LINKS') != None:
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doinstall = d.getVar('do_install', 0)
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doinstall += d.getVar('update_alternatives_batch_doinstall', 0)
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d.setVar('do_install', doinstall)
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return
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if d.getVar('ALTERNATIVE_NAME') == None:
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raise bb.build.FuncFailed, "%s inherits update-alternatives but doesn't set ALTERNATIVE_NAME" % d.getVar('FILE')
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if d.getVar('ALTERNATIVE_PATH') == None:
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raise bb.build.FuncFailed, "%s inherits update-alternatives but doesn't set ALTERNATIVE_PATH" % d.getVar('FILE')
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python __anonymous() {
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update_alternatives_after_parse(d)
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}
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python populate_packages_prepend () {
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pkg = d.getVar('PN', 1)
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bb.note('adding update-alternatives calls to postinst/postrm for %s' % pkg)
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postinst = d.getVar('pkg_postinst_%s' % pkg, 1) or d.getVar('pkg_postinst', 1)
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if not postinst:
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postinst = '#!/bin/sh\n'
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if d.getVar('ALTERNATIVE_LINKS') != None:
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postinst += d.getVar('update_alternatives_batch_postinst', 1)
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else:
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postinst += d.getVar('update_alternatives_postinst', 1)
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d.setVar('pkg_postinst_%s' % pkg, postinst)
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postrm = d.getVar('pkg_postrm_%s' % pkg, 1) or d.getVar('pkg_postrm', 1)
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if not postrm:
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postrm = '#!/bin/sh\n'
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if d.getVar('ALTERNATIVE_LINKS') != None:
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postrm += d.getVar('update_alternatives_batch_postrm', 1)
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else:
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postrm += d.getVar('update_alternatives_postrm', 1)
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d.setVar('pkg_postrm_%s' % pkg, postrm)
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}
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