diff options
Diffstat (limited to 'meta/classes/update-alternatives.bbclass')
| -rw-r--r-- | meta/classes/update-alternatives.bbclass | 83 |
1 files changed, 81 insertions, 2 deletions
diff --git a/meta/classes/update-alternatives.bbclass b/meta/classes/update-alternatives.bbclass index ddbf4c1947..fdb4214b65 100644 --- a/meta/classes/update-alternatives.bbclass +++ b/meta/classes/update-alternatives.bbclass @@ -1,3 +1,41 @@ +# This class is used to help the alternatives system which is useful when +# multiple sources provide same command. You can use update-alternatives +# command directly in your recipe, but in most cases this class simplifies +# that job. +# +# There're two basic modes supported: 'single update' and 'batch update' +# +# 'single update' is used for a single alternative command, and you're +# expected to provide at least below keywords: +# +# ALTERNATIVE_NAME - the name that the alternative is registered +# ALTERNATIVE_PATH - the path of installed alternative +# +# ALTENATIVE_PRIORITY and ALTERNATIVE_LINK are optional which have defautls +# in this class. +# +# 'batch update' is used if you have multiple alternatives to be updated. +# Unlike 'single update', 'batch update' in most times only require two +# parameter: +# +# ALTERNATIVE_LINKS - a list of symbol links for which you'd like to +# create alternatives, with space as delimiter, e.g: +# +# ALTERNATIVE_LINKS = "${bindir}/cmd1 ${sbindir}/cmd2 ..." +# +# ALTNERATIVE_PRIORITY - optional, applies to all +# +# To simplify the design, this class has the assumption that for a name +# listed in ALTERNATIVE_LINKS, say /path/cmd: +# +# the name of the alternative would be: cmd +# the path of installed alternative would be: /path/cmd.${PN} +# ${D}/path/cmd will be renamed to ${D}/path/cmd.{PN} automatically +# priority will be the same from ALTERNATIVE_PRIORITY +# +# If above assumption breaks your requirement, then you still need to use +# your own update-alternatives command directly. + # defaults ALTERNATIVE_PRIORITY = "10" ALTERNATIVE_LINK = "${bindir}/${ALTERNATIVE_NAME}" @@ -10,7 +48,42 @@ update_alternatives_postrm() { update-alternatives --remove ${ALTERNATIVE_NAME} ${ALTERNATIVE_PATH} } +# for batch alternatives, we use a simple approach to require only one parameter +# with the rest info deduced implicitly +update_alternatives_batch_postinst() { +for link in ${ALTERNATIVE_LINKS} +do + name=`basename ${link}` + path=${link}.${PN} + update-alternatives --install ${link} ${name} ${path} ${ALTERNATIVE_PRIORITY} +done +} + +update_alternatives_batch_postrm() { +for link in ${ALTERNATIVE_LINKS} +do + name=`basename ${link}` + path=${link}.${PN} + update-alternatives --remove ${name} $path +done +} + +update_alternatives_batch_doinstall() { +if [ "${PN}" = "${BPN}" ] ; then + for link in ${ALTERNATIVE_LINKS} + do + mv ${D}${link} ${D}${link}.${PN} + done +fi +} + def update_alternatives_after_parse(d): + if bb.data.getVar('ALTERNATIVE_LINKS', d) != None: + doinstall = bb.data.getVar('do_install', d, 1) + doinstall += bb.data.getVar('update_alternatives_batch_doinstall', d, 1) + bb.data.setVar('do_install', doinstall, d) + return + if bb.data.getVar('ALTERNATIVE_NAME', d) == None: raise bb.build.FuncFailed, "%s inherits update-alternatives but doesn't set ALTERNATIVE_NAME" % bb.data.getVar('FILE', d) if bb.data.getVar('ALTERNATIVE_PATH', d) == None: @@ -26,11 +99,17 @@ python populate_packages_prepend () { postinst = bb.data.getVar('pkg_postinst_%s' % pkg, d, 1) or bb.data.getVar('pkg_postinst', d, 1) if not postinst: postinst = '#!/bin/sh\n' - postinst += bb.data.getVar('update_alternatives_postinst', d, 1) + if bb.data.getVar('ALTERNATIVE_LINKS', d) != None: + postinst += bb.data.getVar('update_alternatives_batch_postinst', d, 1) + else: + postinst += bb.data.getVar('update_alternatives_postinst', d, 1) bb.data.setVar('pkg_postinst_%s' % pkg, postinst, d) postrm = bb.data.getVar('pkg_postrm_%s' % pkg, d, 1) or bb.data.getVar('pkg_postrm', d, 1) if not postrm: postrm = '#!/bin/sh\n' - postrm += bb.data.getVar('update_alternatives_postrm', d, 1) + if bb.data.getVar('ALTERNATIVE_LINKS', d) != None: + postrm += bb.data.getVar('update_alternatives_batch_postrm', d, 1) + else: + postrm += bb.data.getVar('update_alternatives_postrm', d, 1) bb.data.setVar('pkg_postrm_%s' % pkg, postrm, d) } |