# 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. # # To use this class a number of variables should be defined: # # List all of the alternatives needed by a package: # ALTERNATIVE_<pkg> = "name1 name2 name3 ..." # # i.e. ALTERNATIVE_busybox = "sh sed test bracket" # # The pathname of the link # ALTERNATIVE_LINK_NAME[name] = "target" # # This is the name of the binary once it's been installed onto the runtime. # This name is global to all split packages in this recipe, and should match # other recipes with the same functionality. # i.e. ALTERNATIVE_LINK_NAME[bracket] = "/usr/bin/[" # # NOTE: If ALTERNATIVE_LINK_NAME is not defined, it defaults to ${bindir}/name # # The default link to create for all targets # ALTERNATIVE_TARGET = "target" # # This is useful in a multicall binary case # i.e. ALTERNATIVE_TARGET = "/bin/busybox" # # A non-default link to create for a target # ALTERNATIVE_TARGET[name] = "target" # # This is the name of the binary as it's been install by do_install # i.e. ALTERNATIVE_TARGET[sh] = "/bin/bash" # # A package specific link for a target # ALTERNATIVE_TARGET_<pkg>[name] = "target" # # This is useful when a recipe provides multiple alternatives for the # same item. # # NOTE: If ALTERNATIVE_TARGET is not defined, it will inherit the value # from ALTERNATIVE_LINK_NAME. # # NOTE: If the ALTERNATIVE_LINK_NAME and ALTERNATIVE_TARGET are the same, # ALTERNATIVE_TARGET will have '.{BPN}' appended to it. If the file # referenced has not been renamed, it will also be renamed. (This avoids # the need to rename alternative files in the do_install step, but still # supports it if necessary for some reason.) # # The default priority for any alternatives # ALTERNATIVE_PRIORITY = "priority" # # i.e. default is ALTERNATIVE_PRIORITY = "10" # # The non-default priority for a specific target # ALTERNATIVE_PRIORITY[name] = "priority" # # The package priority for a specific target # ALTERNATIVE_PRIORITY_<pkg>[name] = "priority" ALTERNATIVE_PRIORITY = "10" # We need special processing for vardeps because it can not work on # modified flag values. So we agregate the flags into a new variable # and include that vairable in the set. UPDALTVARS = "ALTERNATIVE ALTERNATIVE_LINK_NAME ALTERNATIVE_TARGET ALTERNATIVE_PRIORITY" def gen_updatealternativesvardeps(d): pkgs = (d.getVar("PACKAGES", True) or "").split() vars = (d.getVar("UPDALTVARS", True) or "").split() # First compute them for non_pkg versions for v in vars: for flag in (d.getVarFlags(v) or {}): if flag == "doc" or flag == "vardeps" or flag == "vardepsexp": continue d.appendVar('%s_VARDEPS' % (v), ' %s:%s' % (flag, d.getVarFlag(v, flag, False))) for p in pkgs: for v in vars: for flag in (d.getVarFlags("%s_%s" % (v,p)) or {}): if flag == "doc" or flag == "vardeps" or flag == "vardepsexp": continue d.appendVar('%s_VARDEPS_%s' % (v,p), ' %s:%s' % (flag, d.getVarFlag('%s_%s' % (v,p), flag, False))) def ua_extend_depends(d): if not 'virtual/update-alternatives' in d.getVar('PROVIDES', True): d.appendVar('DEPENDS', ' virtual/${MLPREFIX}update-alternatives') python __anonymous() { # Update Alternatives only works on target packages... if bb.data.inherits_class('native', d) or bb.data.inherits_class('nativesdk', d) or \ bb.data.inherits_class('cross', d) or bb.data.inherits_class('crosssdk', d) or \ bb.data.inherits_class('cross-canadian', d): return # compute special vardeps gen_updatealternativesvardeps(d) # extend the depends to include virtual/update-alternatives ua_extend_depends(d) } def gen_updatealternativesvars(d): ret = [] pkgs = (d.getVar("PACKAGES", True) or "").split() vars = (d.getVar("UPDALTVARS", True) or "").split() for v in vars: ret.append(v + "_VARDEPS") for p in pkgs: for v in vars: ret.append(v + "_" + p) ret.append(v + "_VARDEPS_" + p) return " ".join(ret) # Now the new stuff, we use a custom function to generate the right values populate_packages[vardeps] += "${UPDALTVARS} ${@gen_updatealternativesvars(d)}" # We need to do the rename after the image creation step, but before # the split and strip steps.. packagecopy seems to be the earliest reasonable # place. python perform_packagecopy_append () { # Check for deprecated usage... pn = d.getVar('BPN', True) if d.getVar('ALTERNATIVE_LINKS', True) != None: bb.fatal('%s: Use of ALTERNATIVE_LINKS/ALTERNATIVE_PATH/ALTERNATIVE_NAME is no longer supported, please convert to the updated syntax, see update-alternatives.bbclass for more info.' % pn) # Do actual update alternatives processing pkgdest = d.getVar('PKGD', True) for pkg in (d.getVar('PACKAGES', True) or "").split(): # If the src == dest, we know we need to rename the dest by appending ${BPN} link_rename = {} for alt_name in (d.getVar('ALTERNATIVE_%s' % pkg, True) or "").split(): alt_link = d.getVarFlag('ALTERNATIVE_LINK_NAME', alt_name, True) if not alt_link: alt_link = "%s/%s" % (d.getVar('bindir', True), alt_name) d.setVarFlag('ALTERNATIVE_LINK_NAME', alt_name, alt_link) alt_target = d.getVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name, True) or d.getVarFlag('ALTERNATIVE_TARGET', alt_name, True) alt_target = alt_target or d.getVar('ALTERNATIVE_TARGET_%s' % pkg, True) or d.getVar('ALTERNATIVE_TARGET', True) or alt_link # Sometimes alt_target is specified as relative to the link name. alt_target = os.path.join(os.path.dirname(alt_link), alt_target) # If the link and target are the same name, we need to rename the target. if alt_link == alt_target: src = '%s/%s' % (pkgdest, alt_target) alt_target_rename = '%s.%s' % (alt_target, pn) dest = '%s/%s' % (pkgdest, alt_target_rename) if os.path.lexists(dest): bb.note('%s: Already renamed: %s' % (pn, alt_target_rename)) elif os.path.lexists(src): if os.path.islink(src): # Delay rename of links link_rename[alt_target] = alt_target_rename else: bb.note('%s: Rename %s -> %s' % (pn, alt_target, alt_target_rename)) os.rename(src, dest) else: bb.warn("%s: alternative target (%s or %s) does not exist, skipping..." % (pn, alt_target, alt_target_rename)) continue d.setVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name, alt_target_rename) # Process delayed link names # Do these after other renames so we can correct broken links for alt_target in link_rename: src = '%s/%s' % (pkgdest, alt_target) dest = '%s/%s' % (pkgdest, link_rename[alt_target]) link = os.readlink(src) link_target = oe.path.realpath(src, pkgdest, True) if os.path.lexists(link_target): # Ok, the link_target exists, we can rename bb.note('%s: Rename (link) %s -> %s' % (pn, alt_target, link_rename[alt_target])) os.rename(src, dest) else: # Try to resolve the broken link to link.${BPN} link_maybe = '%s.%s' % (os.readlink(src), pn) if os.path.lexists(os.path.join(os.path.dirname(src), link_maybe)): # Ok, the renamed link target exists.. create a new link, and remove the original bb.note('%s: Creating new link %s -> %s' % (pn, link_rename[alt_target], link_maybe)) os.symlink(link_maybe, dest) os.unlink(src) else: bb.warn('%s: Unable to resolve dangling symlink: %s' % (pn, alt_target)) } PACKAGESPLITFUNCS_prepend = "populate_packages_updatealternatives " python populate_packages_updatealternatives () { pn = d.getVar('BPN', True) # Do actual update alternatives processing pkgdest = d.getVar('PKGD', True) for pkg in (d.getVar('PACKAGES', True) or "").split(): # Create post install/removal scripts alt_setup_links = "" alt_remove_links = "" for alt_name in (d.getVar('ALTERNATIVE_%s' % pkg, True) or "").split(): alt_link = d.getVarFlag('ALTERNATIVE_LINK_NAME', alt_name, True) alt_target = d.getVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name, True) or d.getVarFlag('ALTERNATIVE_TARGET', alt_name, True) alt_target = alt_target or d.getVar('ALTERNATIVE_TARGET_%s' % pkg, True) or d.getVar('ALTERNATIVE_TARGET', True) or alt_link # Sometimes alt_target is specified as relative to the link name. alt_target = os.path.join(os.path.dirname(alt_link), alt_target) alt_priority = d.getVarFlag('ALTERNATIVE_PRIORITY_%s' % pkg, alt_name, True) or d.getVarFlag('ALTERNATIVE_PRIORITY', alt_name, True) alt_priority = alt_priority or d.getVar('ALTERNATIVE_PRIORITY_%s' % pkg, True) or d.getVar('ALTERNATIVE_PRIORITY', True) # This shouldn't trigger, as it should have been resolved earlier! if alt_link == alt_target: bb.note('alt_link == alt_target: %s == %s -- correcting, this should not happen!' % (alt_link, alt_target)) alt_target = '%s.%s' % (alt_target, pn) if not os.path.lexists('%s/%s' % (pkgdest, alt_target)): bb.warn('%s: NOT adding alternative provide %s: %s does not exist' % (pn, alt_link, alt_target)) continue # Default to generate shell script.. eventually we may want to change this... alt_target = os.path.normpath(alt_target) alt_setup_links += '\tupdate-alternatives --install %s %s %s %s\n' % (alt_link, alt_name, alt_target, alt_priority) alt_remove_links += '\tupdate-alternatives --remove %s %s\n' % (alt_name, alt_target) if alt_setup_links: # RDEPENDS setup provider = d.getVar('VIRTUAL-RUNTIME_update-alternatives', True) if provider: #bb.note('adding runtime requirement for update-alternatives for %s' % pkg) d.appendVar('RDEPENDS_%s' % pkg, ' ' + d.getVar('MLPREFIX') + provider) bb.note('adding update-alternatives calls to postinst/postrm for %s' % pkg) bb.note('%s' % alt_setup_links) postinst = d.getVar('pkg_postinst_%s' % pkg, True) or '#!/bin/sh\n' postinst += alt_setup_links d.setVar('pkg_postinst_%s' % pkg, postinst) bb.note('%s' % alt_remove_links) postrm = d.getVar('pkg_postrm_%s' % pkg, True) or '#!/bin/sh\n' postrm += alt_remove_links d.setVar('pkg_postrm_%s' % pkg, postrm) } python package_do_filedeps_append () { pn = d.getVar('BPN', True) pkgdest = d.getVar('PKGDEST', True) for pkg in packages.split(): for alt_name in (d.getVar('ALTERNATIVE_%s' % pkg, True) or "").split(): alt_link = d.getVarFlag('ALTERNATIVE_LINK_NAME', alt_name, True) alt_target = d.getVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name, True) or d.getVarFlag('ALTERNATIVE_TARGET', alt_name, True) alt_target = alt_target or d.getVar('ALTERNATIVE_TARGET_%s' % pkg, True) or d.getVar('ALTERNATIVE_TARGET', True) or alt_link if alt_link == alt_target: bb.warn('alt_link == alt_target: %s == %s' % (alt_link, alt_target)) alt_target = '%s.%s' % (alt_target, pn) if not os.path.lexists('%s/%s/%s' % (pkgdest, pkg, alt_target)): continue # Add file provide trans_target = oe.package.file_translate(alt_target) d.appendVar('FILERPROVIDES_%s_%s' % (trans_target, pkg), " " + alt_link) if not trans_target in (d.getVar('FILERPROVIDESFLIST_%s' % pkg, True) or ""): d.appendVar('FILERPROVIDESFLIST_%s' % pkg, " " + trans_target) }