u-boot/tools/patman/settings.py

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# Copyright (c) 2011 The Chromium OS Authors.
#
# SPDX-License-Identifier: GPL-2.0+
#
from __future__ import print_function
try:
import configparser as ConfigParser
except:
import ConfigParser
import os
import re
import command
import gitutil
"""Default settings per-project.
These are used by _ProjectConfigParser. Settings names should match
the "dest" of the option parser from patman.py.
"""
_default_settings = {
"u-boot": {},
"linux": {
"process_tags": "False",
}
}
class _ProjectConfigParser(ConfigParser.SafeConfigParser):
"""ConfigParser that handles projects.
There are two main goals of this class:
- Load project-specific default settings.
- Merge general default settings/aliases with project-specific ones.
# Sample config used for tests below...
>>> try:
... from StringIO import StringIO
... except ImportError:
... from io import StringIO
>>> sample_config = '''
... [alias]
... me: Peter P. <likesspiders@example.com>
... enemies: Evil <evil@example.com>
...
... [sm_alias]
... enemies: Green G. <ugly@example.com>
...
... [sm2_alias]
... enemies: Doc O. <pus@example.com>
...
... [settings]
... am_hero: True
... '''
# Check to make sure that bogus project gets general alias.
>>> config = _ProjectConfigParser("zzz")
>>> config.readfp(StringIO(sample_config))
>>> config.get("alias", "enemies")
'Evil <evil@example.com>'
# Check to make sure that alias gets overridden by project.
>>> config = _ProjectConfigParser("sm")
>>> config.readfp(StringIO(sample_config))
>>> config.get("alias", "enemies")
'Green G. <ugly@example.com>'
# Check to make sure that settings get merged with project.
>>> config = _ProjectConfigParser("linux")
>>> config.readfp(StringIO(sample_config))
>>> sorted(config.items("settings"))
[('am_hero', 'True'), ('process_tags', 'False')]
# Check to make sure that settings works with unknown project.
>>> config = _ProjectConfigParser("unknown")
>>> config.readfp(StringIO(sample_config))
>>> sorted(config.items("settings"))
[('am_hero', 'True')]
"""
def __init__(self, project_name):
"""Construct _ProjectConfigParser.
In addition to standard SafeConfigParser initialization, this also loads
project defaults.
Args:
project_name: The name of the project.
"""
self._project_name = project_name
ConfigParser.SafeConfigParser.__init__(self)
# Update the project settings in the config based on
# the _default_settings global.
project_settings = "%s_settings" % project_name
if not self.has_section(project_settings):
self.add_section(project_settings)
project_defaults = _default_settings.get(project_name, {})
for setting_name, setting_value in project_defaults.items():
self.set(project_settings, setting_name, setting_value)
def get(self, section, option, *args, **kwargs):
"""Extend SafeConfigParser to try project_section before section.
Args:
See SafeConfigParser.
Returns:
See SafeConfigParser.
"""
try:
return ConfigParser.SafeConfigParser.get(
self, "%s_%s" % (self._project_name, section), option,
*args, **kwargs
)
except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
return ConfigParser.SafeConfigParser.get(
self, section, option, *args, **kwargs
)
def items(self, section, *args, **kwargs):
"""Extend SafeConfigParser to add project_section to section.
Args:
See SafeConfigParser.
Returns:
See SafeConfigParser.
"""
project_items = []
has_project_section = False
top_items = []
# Get items from the project section
try:
project_items = ConfigParser.SafeConfigParser.items(
self, "%s_%s" % (self._project_name, section), *args, **kwargs
)
has_project_section = True
except ConfigParser.NoSectionError:
pass
# Get top-level items
try:
top_items = ConfigParser.SafeConfigParser.items(
self, section, *args, **kwargs
)
except ConfigParser.NoSectionError:
# If neither section exists raise the error on...
if not has_project_section:
raise
item_dict = dict(top_items)
item_dict.update(project_items)
return item_dict.items()
def ReadGitAliases(fname):
"""Read a git alias file. This is in the form used by git:
alias uboot u-boot@lists.denx.de
alias wd Wolfgang Denk <wd@denx.de>
Args:
fname: Filename to read
"""
try:
fd = open(fname, 'r')
except IOError:
print("Warning: Cannot find alias file '%s'" % fname)
return
re_line = re.compile('alias\s+(\S+)\s+(.*)')
for line in fd.readlines():
line = line.strip()
if not line or line[0] == '#':
continue
m = re_line.match(line)
if not m:
print("Warning: Alias file line '%s' not understood" % line)
continue
list = alias.get(m.group(1), [])
for item in m.group(2).split(','):
item = item.strip()
if item:
list.append(item)
alias[m.group(1)] = list
fd.close()
def CreatePatmanConfigFile(config_fname):
"""Creates a config file under $(HOME)/.patman if it can't find one.
Args:
config_fname: Default config filename i.e., $(HOME)/.patman
Returns:
None
"""
name = gitutil.GetDefaultUserName()
if name == None:
name = raw_input("Enter name: ")
email = gitutil.GetDefaultUserEmail()
if email == None:
email = raw_input("Enter email: ")
try:
f = open(config_fname, 'w')
except IOError:
print("Couldn't create patman config file\n")
raise
print('''[alias]
me: %s <%s>
[bounces]
nxp = Zhikang Zhang <zhikang.zhang@nxp.com>
''' % (name, email), file=f)
f.close();
def _UpdateDefaults(parser, config):
"""Update the given OptionParser defaults based on config.
We'll walk through all of the settings from the parser
For each setting we'll look for a default in the option parser.
If it's found we'll update the option parser default.
The idea here is that the .patman file should be able to update
defaults but that command line flags should still have the final
say.
Args:
parser: An instance of an OptionParser whose defaults will be
updated.
config: An instance of _ProjectConfigParser that we will query
for settings.
"""
defaults = parser.get_default_values()
for name, val in config.items('settings'):
if hasattr(defaults, name):
default_val = getattr(defaults, name)
if isinstance(default_val, bool):
val = config.getboolean('settings', name)
elif isinstance(default_val, int):
val = config.getint('settings', name)
parser.set_default(name, val)
else:
print("WARNING: Unknown setting %s" % name)
def _ReadAliasFile(fname):
"""Read in the U-Boot git alias file if it exists.
Args:
fname: Filename to read.
"""
if os.path.exists(fname):
bad_line = None
with open(fname) as fd:
linenum = 0
for line in fd:
linenum += 1
line = line.strip()
if not line or line.startswith('#'):
continue
words = line.split(' ', 2)
if len(words) < 3 or words[0] != 'alias':
if not bad_line:
bad_line = "%s:%d:Invalid line '%s'" % (fname, linenum,
line)
continue
alias[words[1]] = [s.strip() for s in words[2].split(',')]
if bad_line:
print(bad_line)
def _ReadBouncesFile(fname):
"""Read in the bounces file if it exists
Args:
fname: Filename to read.
"""
if os.path.exists(fname):
with open(fname) as fd:
for line in fd:
if line.startswith('#'):
continue
bounces.add(line.strip())
def GetItems(config, section):
"""Get the items from a section of the config.
Args:
config: _ProjectConfigParser object containing settings
section: name of section to retrieve
Returns:
List of (name, value) tuples for the section
"""
try:
return config.items(section)
except ConfigParser.NoSectionError as e:
return []
except:
raise
def Setup(parser, project_name, config_fname=''):
"""Set up the settings module by reading config files.
Args:
parser: The parser to update
project_name: Name of project that we're working on; we'll look
for sections named "project_section" as well.
config_fname: Config filename to read ('' for default)
"""
# First read the git alias file if available
_ReadAliasFile('doc/git-mailrc')
config = _ProjectConfigParser(project_name)
if config_fname == '':
config_fname = '%s/.patman' % os.getenv('HOME')
if not os.path.exists(config_fname):
print("No config file found ~/.patman\nCreating one...\n")
CreatePatmanConfigFile(config_fname)
config.read(config_fname)
for name, value in GetItems(config, 'alias'):
alias[name] = value.split(',')
_ReadBouncesFile('doc/bounces')
for name, value in GetItems(config, 'bounces'):
bounces.add(value)
_UpdateDefaults(parser, config)
# These are the aliases we understand, indexed by alias. Each member is a list.
alias = {}
bounces = set()
if __name__ == "__main__":
import doctest
doctest.testmod()