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update-alternatives.bbclass: Add function to get metadata

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This adds update_alternatives_alt_targets function to get the metadata
for a package. This is for code reuse because the metadata would help
other classes that needs to be aware of how update-alternatives modify
the final package.

[YOCTO #12597]
[YOCTO #13238]

(From OE-Core rev: 04d966c0a91c5e16555bba827969a0a2fd96bb96)

Signed-off-by: Mariano Lopez <just.another.mariano@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Mariano Lopez
2019-04-09 00:44:12 -05:00
committed by Richard Purdie
parent 4e511f0abc
commit 5feccb430b
1 changed files with 45 additions and 25 deletions
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70
meta/classes/update-alternatives.bbclass
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@@ -216,42 +216,62 @@ python apply_update_alternative_renames () {
update_files(alt_target, alt_target_rename, pkg, d)
}
def update_alternatives_alt_targets(d, pkg):
"""
Returns the update-alternatives metadata for a package.
The returned format is a list of tuples where the tuple contains:
alt_name: The binary name
alt_link: The path for the binary (Shared by different packages)
alt_target: The path for the renamed binary (Unique per package)
alt_priority: The priority of the alt_target
All the alt_targets will be installed into the sysroot. The alt_link is
a symlink pointing to the alt_target with the highest priority.
"""
pn = d.getVar('BPN')
pkgdest = d.getVar('PKGD')
updates = list()
for alt_name in (d.getVar('ALTERNATIVE_%s' % pkg) or "").split():
alt_link = d.getVarFlag('ALTERNATIVE_LINK_NAME', alt_name)
alt_target = d.getVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name) or \
d.getVarFlag('ALTERNATIVE_TARGET', alt_name) or \
d.getVar('ALTERNATIVE_TARGET_%s' % pkg) or \
d.getVar('ALTERNATIVE_TARGET') or \
alt_link
alt_priority = d.getVarFlag('ALTERNATIVE_PRIORITY_%s' % pkg, alt_name) or \
d.getVarFlag('ALTERNATIVE_PRIORITY', alt_name) or \
d.getVar('ALTERNATIVE_PRIORITY_%s' % pkg) or \
d.getVar('ALTERNATIVE_PRIORITY')
# 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
alt_target = os.path.normpath(alt_target)
updates.append( (alt_name, alt_link, alt_target, alt_priority) )
return updates
PACKAGESPLITFUNCS_prepend = "populate_packages_updatealternatives "
python populate_packages_updatealternatives () {
if not update_alternatives_enabled(d):
return
pn = d.getVar('BPN')
# Do actual update alternatives processing
pkgdest = d.getVar('PKGD')
for pkg in (d.getVar('PACKAGES') or "").split():
# Create post install/removal scripts
alt_setup_links = ""
alt_remove_links = ""
for alt_name in (d.getVar('ALTERNATIVE_%s' % pkg) or "").split():
alt_link = d.getVarFlag('ALTERNATIVE_LINK_NAME', alt_name)
alt_target = d.getVarFlag('ALTERNATIVE_TARGET_%s' % pkg, alt_name) or d.getVarFlag('ALTERNATIVE_TARGET', alt_name)
alt_target = alt_target or d.getVar('ALTERNATIVE_TARGET_%s' % pkg) or d.getVar('ALTERNATIVE_TARGET') 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) or d.getVarFlag('ALTERNATIVE_PRIORITY', alt_name)
alt_priority = alt_priority or d.getVar('ALTERNATIVE_PRIORITY_%s' % pkg) or d.getVar('ALTERNATIVE_PRIORITY')
# 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)
updates = update_alternatives_alt_targets(d, pkg)
for alt_name, alt_link, alt_target, alt_priority in updates:
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)