Move the run part of LoraxTemplateRunner into new TemplateRunner class
This will make it easier to add a new subclass that only handles installpkg for use with livemedia-creator and lorax-composer iso creation.
This commit is contained in:
Brian C. Lane
parent
a0ff34dcb1
commit
8eaad3bc5e
@ -103,8 +103,83 @@ def rexists(pathname, root=""):
|
||||
return True
|
||||
return False
|
||||
|
||||
class TemplateRunner(object):
|
||||
'''
|
||||
This class parses and executes Lorax templates. Sample usage:
|
||||
|
||||
# install a bunch of packages
|
||||
runner = LoraxTemplateRunner(inroot=rundir, outroot=rundir, dbo=dnf_obj)
|
||||
runner.run("install-packages.ltmpl")
|
||||
NOTES:
|
||||
|
||||
* Parsing procedure is roughly:
|
||||
1. Mako template expansion (on the whole file)
|
||||
2. For each line of the result,
|
||||
|
||||
a. Whitespace splitting (using shlex.split())
|
||||
b. Brace expansion (using brace_expand())
|
||||
c. If the first token is the name of a function, call that function
|
||||
with the rest of the line as arguments
|
||||
|
||||
* Parsing and execution are *separate* passes - so you can't use the result
|
||||
of a command in an %if statement (or any other control statements)!
|
||||
'''
|
||||
def __init__(self, fatalerrors=True, templatedir=None, defaults=None, builtins=None):
|
||||
self.fatalerrors = fatalerrors
|
||||
self.templatedir = templatedir or "/usr/share/lorax"
|
||||
self.templatefile = None
|
||||
self.builtins = builtins or {}
|
||||
self.defaults = defaults or {}
|
||||
|
||||
|
||||
def run(self, templatefile, **variables):
|
||||
for k,v in list(self.defaults.items()) + list(self.builtins.items()):
|
||||
variables.setdefault(k,v)
|
||||
logger.debug("executing %s with variables=%s", templatefile, variables)
|
||||
self.templatefile = templatefile
|
||||
t = LoraxTemplate(directories=[self.templatedir])
|
||||
commands = t.parse(templatefile, variables)
|
||||
self._run(commands)
|
||||
|
||||
|
||||
def _run(self, parsed_template):
|
||||
logger.info("running %s", self.templatefile)
|
||||
for (num, line) in enumerate(parsed_template,1):
|
||||
logger.debug("template line %i: %s", num, " ".join(line))
|
||||
skiperror = False
|
||||
(cmd, args) = (line[0], line[1:])
|
||||
# Following Makefile convention, if the command is prefixed with
|
||||
# a dash ('-'), we'll ignore any errors on that line.
|
||||
if cmd.startswith('-'):
|
||||
cmd = cmd[1:]
|
||||
skiperror = True
|
||||
try:
|
||||
# grab the method named in cmd and pass it the given arguments
|
||||
f = getattr(self, cmd, None)
|
||||
if cmd[0] == '_' or cmd == 'run' or not isinstance(f, collections.Callable):
|
||||
raise ValueError("unknown command %s" % cmd)
|
||||
f(*args)
|
||||
except Exception: # pylint: disable=broad-except
|
||||
if skiperror:
|
||||
logger.debug("ignoring error")
|
||||
continue
|
||||
logger.error("template command error in %s:", self.templatefile)
|
||||
logger.error(" %s", " ".join(line))
|
||||
# format the exception traceback
|
||||
exclines = traceback.format_exception(*sys.exc_info())
|
||||
# skip the bit about "ltmpl.py, in _run()" - we know that
|
||||
exclines.pop(1)
|
||||
# log the "ErrorType: this is what happened" line
|
||||
logger.error(" %s", exclines[-1].strip())
|
||||
# and log the entire traceback to the debug log
|
||||
for _line in ''.join(exclines).splitlines():
|
||||
logger.debug(" %s", _line)
|
||||
if self.fatalerrors:
|
||||
raise
|
||||
|
||||
|
||||
# TODO: operate inside an actual chroot for safety? Not that RPM bothers..
|
||||
class LoraxTemplateRunner(object):
|
||||
class LoraxTemplateRunner(TemplateRunner):
|
||||
'''
|
||||
This class parses and executes Lorax templates. Sample usage:
|
||||
|
||||
@ -118,18 +193,6 @@ class LoraxTemplateRunner(object):
|
||||
|
||||
NOTES:
|
||||
|
||||
* Parsing procedure is roughly:
|
||||
1. Mako template expansion (on the whole file)
|
||||
2. For each line of the result,
|
||||
|
||||
a. Whitespace splitting (using shlex.split())
|
||||
b. Brace expansion (using brace_expand())
|
||||
c. If the first token is the name of a function, call that function
|
||||
with the rest of the line as arguments
|
||||
|
||||
* Parsing and execution are *separate* passes - so you can't use the result
|
||||
of a command in an %if statement (or any other control statements)!
|
||||
|
||||
* Commands that run external programs (e.g. systemctl) currently use
|
||||
the *host*'s copy of that program, which may cause problems if there's a
|
||||
big enough difference between the host and the image you're modifying.
|
||||
@ -152,14 +215,11 @@ class LoraxTemplateRunner(object):
|
||||
self.inroot = inroot
|
||||
self.outroot = outroot
|
||||
self.dbo = dbo
|
||||
self.fatalerrors = fatalerrors
|
||||
self.templatedir = templatedir or "/usr/share/lorax"
|
||||
self.templatefile = None
|
||||
# some builtin methods
|
||||
self.builtins = DataHolder(exists=lambda p: rexists(p, root=inroot),
|
||||
glob=lambda g: list(rglob(g, root=inroot)))
|
||||
self.defaults = defaults or {}
|
||||
builtins = DataHolder(exists=lambda p: rexists(p, root=inroot),
|
||||
glob=lambda g: list(rglob(g, root=inroot)))
|
||||
self.results = DataHolder(treeinfo=dict()) # just treeinfo for now
|
||||
|
||||
super(LoraxTemplateRunner, self).__init__(fatalerrors, templatedir, defaults, builtins)
|
||||
# TODO: set up custom logger with a filter to add line info
|
||||
|
||||
def _out(self, path):
|
||||
@ -210,51 +270,6 @@ class LoraxTemplateRunner(object):
|
||||
for pkg in debug_pkgs:
|
||||
f.write("%s\n" % pkg)
|
||||
|
||||
def run(self, templatefile, **variables):
|
||||
for k,v in list(self.defaults.items()) + list(self.builtins.items()):
|
||||
variables.setdefault(k,v)
|
||||
logger.debug("executing %s with variables=%s", templatefile, variables)
|
||||
self.templatefile = templatefile
|
||||
t = LoraxTemplate(directories=[self.templatedir])
|
||||
commands = t.parse(templatefile, variables)
|
||||
self._run(commands)
|
||||
|
||||
|
||||
def _run(self, parsed_template):
|
||||
logger.info("running %s", self.templatefile)
|
||||
for (num, line) in enumerate(parsed_template,1):
|
||||
logger.debug("template line %i: %s", num, " ".join(line))
|
||||
skiperror = False
|
||||
(cmd, args) = (line[0], line[1:])
|
||||
# Following Makefile convention, if the command is prefixed with
|
||||
# a dash ('-'), we'll ignore any errors on that line.
|
||||
if cmd.startswith('-'):
|
||||
cmd = cmd[1:]
|
||||
skiperror = True
|
||||
try:
|
||||
# grab the method named in cmd and pass it the given arguments
|
||||
f = getattr(self, cmd, None)
|
||||
if cmd[0] == '_' or cmd == 'run' or not isinstance(f, collections.Callable):
|
||||
raise ValueError("unknown command %s" % cmd)
|
||||
f(*args)
|
||||
except Exception: # pylint: disable=broad-except
|
||||
if skiperror:
|
||||
logger.debug("ignoring error")
|
||||
continue
|
||||
logger.error("template command error in %s:", self.templatefile)
|
||||
logger.error(" %s", " ".join(line))
|
||||
# format the exception traceback
|
||||
exclines = traceback.format_exception(*sys.exc_info())
|
||||
# skip the bit about "ltmpl.py, in _run()" - we know that
|
||||
exclines.pop(1)
|
||||
# log the "ErrorType: this is what happened" line
|
||||
logger.error(" %s", exclines[-1].strip())
|
||||
# and log the entire traceback to the debug log
|
||||
for _line in ''.join(exclines).splitlines():
|
||||
logger.debug(" %s", _line)
|
||||
if self.fatalerrors:
|
||||
raise
|
||||
|
||||
def install(self, srcglob, dest):
|
||||
'''
|
||||
install SRC DEST
|
||||
@ -265,7 +280,7 @@ class LoraxTemplateRunner(object):
|
||||
If DEST doesn't exist, SRC will be copied to a file with that name,
|
||||
assuming the rest of the path exists.
|
||||
This is pretty much like how the 'cp' command works.
|
||||
|
||||
|
||||
Examples:
|
||||
install usr/share/myconfig/grub.conf /boot
|
||||
install /usr/share/myconfig/grub.conf.in /boot/grub.conf
|
||||
@ -321,7 +336,7 @@ class LoraxTemplateRunner(object):
|
||||
'''
|
||||
mkdir DIR [DIR ...]
|
||||
Create the named DIR(s). Will create leading directories as needed.
|
||||
|
||||
|
||||
Example:
|
||||
mkdir /images
|
||||
'''
|
||||
@ -335,7 +350,7 @@ class LoraxTemplateRunner(object):
|
||||
replace PATTERN REPLACEMENT FILEGLOB [FILEGLOB ...]
|
||||
Find-and-replace the given PATTERN (Python-style regex) with the given
|
||||
REPLACEMENT string for each of the files listed.
|
||||
|
||||
|
||||
Example:
|
||||
replace @VERSION@ ${product.version} /boot/grub.conf /boot/isolinux.cfg
|
||||
'''
|
||||
@ -353,9 +368,9 @@ class LoraxTemplateRunner(object):
|
||||
Append STRING (followed by a newline character) to FILE.
|
||||
Python character escape sequences ('\\n', '\\t', etc.) will be
|
||||
converted to the appropriate characters.
|
||||
|
||||
|
||||
Examples:
|
||||
|
||||
|
||||
append /etc/depmod.d/dd.conf "search updates built-in"
|
||||
append /etc/resolv.conf ""
|
||||
'''
|
||||
@ -368,7 +383,7 @@ class LoraxTemplateRunner(object):
|
||||
Add an item to the treeinfo data store.
|
||||
The given SECTION will have a new item added where
|
||||
KEY = ARG ARG ...
|
||||
|
||||
|
||||
Example:
|
||||
treeinfo images-${kernel.arch} boot.iso images/boot.iso
|
||||
'''
|
||||
@ -469,7 +484,7 @@ class LoraxTemplateRunner(object):
|
||||
'''
|
||||
log MESSAGE
|
||||
Emit the given log message. Be sure to put it in quotes!
|
||||
|
||||
|
||||
Example:
|
||||
log "Reticulating splines, please wait..."
|
||||
'''
|
||||
@ -588,7 +603,7 @@ class LoraxTemplateRunner(object):
|
||||
'''
|
||||
removepkg PKGGLOB [PKGGLOB...]
|
||||
Delete the named package(s).
|
||||
|
||||
|
||||
IMPLEMENTATION NOTES:
|
||||
RPM scriptlets (%preun/%postun) are *not* run.
|
||||
Files are deleted, but directories are left behind.
|
||||
@ -653,7 +668,7 @@ class LoraxTemplateRunner(object):
|
||||
(or packages) named.
|
||||
If '--allbut' is used, all the files from the given package(s) will
|
||||
be removed *except* the ones which match the file globs.
|
||||
|
||||
|
||||
Examples:
|
||||
removefrom usbutils /usr/bin/*
|
||||
removefrom xfsprogs --allbut /sbin/*
|
||||
@ -748,7 +763,7 @@ class LoraxTemplateRunner(object):
|
||||
'''
|
||||
createaddrsize INITRD_ADDRESS INITRD ADDRSIZE
|
||||
Create the initrd.addrsize file required in LPAR boot process.
|
||||
|
||||
|
||||
Examples:
|
||||
createaddrsize ${INITRD_ADDRESS} ${outroot}/${BOOTDIR}/initrd.img ${outroot}/${BOOTDIR}/initrd.addrsize
|
||||
'''
|
||||
@ -761,7 +776,7 @@ class LoraxTemplateRunner(object):
|
||||
'''
|
||||
systemctl [enable|disable|mask] UNIT [UNIT...]
|
||||
Enable, disable, or mask the given systemd units.
|
||||
|
||||
|
||||
Examples:
|
||||
systemctl disable lvm2-monitor.service
|
||||
systemctl mask fedora-storage-init.service fedora-configure.service
|
||||
|
||||
Loading…
Reference in New Issue
Block a user