Add LiveTemplateRunner to parse per-arch live-iso package requirements

This template runner only uses the installpkg command to gather a list
of package NEVRA to be installed to support live iso creation.

Related: rhbz#1673744
This commit is contained in:
Brian C. Lane 2019-02-15 16:41:07 -08:00
parent 51180ad407
commit 4e862e538b

View File

@ -794,3 +794,84 @@ class LoraxTemplateRunner(TemplateRunner):
runcmd(cmd)
except CalledProcessError:
pass
class LiveTemplateRunner(TemplateRunner):
"""
This class parses and executes a limited Lorax template. Sample usage:
# install a bunch of packages
runner = LiveTemplateRunner(dbo, templatedir, defaults)
runner.run("live-install.tmpl")
It is meant to be used with the live-install.tmpl which lists the per-arch
pacages needed to build the live-iso output.
"""
def __init__(self, dbo, fatalerrors=True, templatedir=None, defaults=None):
self.dbo = dbo
self.pkgs = []
super(LiveTemplateRunner, self).__init__(fatalerrors, templatedir, defaults)
def installpkg(self, *pkgs):
'''
installpkg [--required|--optional] [--except PKGGLOB [--except PKGGLOB ...]] PKGGLOB [PKGGLOB ...]
Request installation of all packages matching the given globs.
Note that this is just a *request* - nothing is *actually* installed
until the 'run_pkg_transaction' command is given.
--required is now the default. If the PKGGLOB can be missing pass --optional
'''
if pkgs[0] == '--optional':
pkgs = pkgs[1:]
required = False
elif pkgs[0] == '--required':
pkgs = pkgs[1:]
required = True
else:
required = True
excludes = []
while '--except' in pkgs:
idx = pkgs.index('--except')
if len(pkgs) == idx+1:
raise ValueError("installpkg needs an argument after --except")
excludes.append(pkgs[idx+1])
pkgs = pkgs[:idx] + pkgs[idx+2:]
errors = False
for p in pkgs:
try:
# Start by using Subject to generate a package query, which will
# give us a query object similar to what dbo.install would select,
# minus the handling for multilib. This query may contain
# multiple arches. Pull the package names out of that, filter any
# that match the excludes patterns, and pass those names back to
# dbo.install to do the actual, arch and version and multilib
# aware, package selction.
# dnf queries don't have a concept of negative globs which is why
# the filtering is done the hard way.
pkgnames = [pkg for pkg in dnf.subject.Subject(p).get_best_query(self.dbo.sack).filter(latest=True)]
if not pkgnames:
raise dnf.exceptions.PackageNotFoundError("no package matched", p)
# Apply excludes to the name only
for exclude in excludes:
pkgnames = [pkg for pkg in pkgnames if not fnmatch.fnmatch(pkg.name, exclude)]
# Convert to a sorted NVR list for installation
pkgnvrs = sorted(["{}-{}-{}".format(pkg.name, pkg.version, pkg.release) for pkg in pkgnames])
# If the request is a glob, expand it in the log
if any(g for g in ['*','?','.'] if g in p):
logger.info("installpkg: %s expands to %s", p, ",".join(pkgnvrs))
self.pkgs.extend(pkgnvrs)
except Exception as e: # pylint: disable=broad-except
logger.error("installpkg %s failed: %s", p, str(e))
errors = True
if errors and required:
raise Exception("Required installpkg failed.")