291 lines
11 KiB
Python
291 lines
11 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) 2020 Salvador E. Tropea
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# Copyright (c) 2020 Instituto Nacional de Tecnología Industrial
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# License: GPL-3.0
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# Project: KiBot (formerly KiPlot)
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"""
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KiCad configuration classes.
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Reads the KiCad's configuration files.
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In particular:
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- kicad_common to know about the 'environment' variables
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- The `sym-lib-table` files to map library aliases
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Notes about coverage:
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I'm excluding all the Darwin and Windows code from coverage.
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I'm not even sure the values are correct.
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"""
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import os
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import re
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import sys
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from io import StringIO
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from glob import glob
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import platform
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import sysconfig
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from ..gs import GS
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from .. import log
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from ..misc import W_NOHOME, W_NOUSER, W_BADSYS, W_NOCONFIG, W_NOKIENV, W_NOLIBS, W_NODEFSYMLIB
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# Check python version to determine which version of ConfirParser to import
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if sys.version_info.major >= 3:
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import configparser as ConfigParser
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else: # pragma: no cover
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# For future Python 2 support
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import ConfigParser
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logger = log.get_logger(__name__)
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SYM_LIB_TABLE = 'sym-lib-table'
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KICAD_COMMON = 'kicad_common'
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class KiConfError(Exception):
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def __init__(self, msg, file, lnum, line):
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super().__init__()
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self.line = lnum
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self.file = file
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self.msg = msg
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self.code = line
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def un_quote(val):
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""" Remove optional quotes """
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if val[0] == '"':
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val.replace('\"', '"')
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val = val[1:-1]
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return val
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def expand_env(val, env):
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""" Expand KiCad environment variables """
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for var in re.findall(r'\$\{(\S+)\}', val):
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if var in env:
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val = val.replace('${'+var+'}', env[var])
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else:
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logger.error('Unable to expand `{}` in `{}`'.format(var, val))
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return val
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class LibAlias(object):
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""" An entry for the symbol libs table """
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libs_re = re.compile(r'\(name\s+(\S+|"(?:[^"]|\\")+")\)\s*\(type\s+(\S+|"(?:[^"]|\\")+")\)'
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r'\s*\(uri\s+(\S+|"(?:[^"]|\\")+")\)\s*\(options\s+(\S+|"(?:[^"]|\\")+")\)'
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r'\s*\(descr\s+(\S+|"(?:[^"]|\\")+")\)')
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def __init__(self):
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super().__init__()
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self.name = None
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self.legacy = True
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self.uri = None
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self.options = None
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self.descr = None
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@staticmethod
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def parse(options, cline, env):
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m = LibAlias.libs_re.match(options)
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if not m:
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raise KiConfError('Malformed lib entry', SYM_LIB_TABLE, cline, options)
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lib = LibAlias()
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lib.name = un_quote(m.group(1))
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lib.legacy = m.group(2) == 'Legacy'
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lib.uri = os.path.abspath(expand_env(un_quote(m.group(3)), env))
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lib.options = un_quote(m.group(4))
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lib.descr = un_quote(m.group(5))
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return lib
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def __str__(self):
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if not self.name:
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return 'unnamed LibAlias'
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return '`'+self.name+'` -> `'+self.uri+'`'
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class KiConf(object):
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""" Class to load and hold all KiCad configuration """
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loaded = False
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config_dir = None
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dirname = None
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sym_lib_dir = None
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kicad_env = {}
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lib_aliases = {}
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def __init__(self):
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assert False, "KiConf is fully static, no instances allowed"
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def init(fname):
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""" fname is the base project name, any extension is allowed.
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So it can be the main schematic, the PCB or the project. """
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if KiConf.loaded:
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return
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KiConf.dirname = os.path.dirname(fname)
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KiConf.kicad_env['KIPRJMOD'] = KiConf.dirname
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KiConf.load_kicad_common()
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KiConf.load_all_lib_aliases()
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KiConf.loaded = True
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def find_kicad_common():
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""" Looks for kicad_common config file.
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Returns its name or None. """
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# User option has the higher priority
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user_set = os.environ.get('KICAD_CONFIG_HOME')
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if user_set:
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cfg = os.path.join(user_set, KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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# XDG option is second
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xdg_set = os.environ.get('XDG_CONFIG_HOME')
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if xdg_set:
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cfg = os.path.join(xdg_set, 'kicad', KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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# Others depends on the OS
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system = platform.system()
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if system == 'Linux':
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# Linux: ~/.config/kicad/
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home = os.environ.get('HOME')
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if not home:
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logger.warning(W_NOHOME + 'Environment variable `HOME` not defined, using `/`')
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home = '/'
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cfg = os.path.join(home, '.config', 'kicad', KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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elif system == 'Darwin': # pragma: no cover
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# MacOSX: ~/Library/Preferences/kicad/
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home = os.environ.get('HOME')
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if not home:
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logger.warning(W_NOHOME + 'Environment variable `HOME` not defined, using `/`')
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home = '/'
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cfg = os.path.join(home, 'Library', 'Preferences', 'kicad', KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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elif system == 'Windows': # pragma: no cover
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# Windows: C:\Users\username\AppData\Roaming\kicad
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# or C:\Documents and Settings\username\Application Data\kicad
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username = os.environ.get('username')
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if not username:
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logger.warning(W_NOUSER + 'Unable to determine current user')
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return None
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cfg = os.path.join('C:', 'Users', username, 'AppData', 'Roaming', 'kicad', KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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cfg = os.path.join('C:', 'Documents and Settings', username, 'Application Data', 'kicad', KICAD_COMMON)
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if os.path.isfile(cfg):
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return cfg
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else: # pragma: no cover
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logger.warning(W_BADSYS + 'Unsupported system `{}`'.format(system))
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return None
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logger.warning(W_NOCONFIG + 'Unable to find KiCad configuration file ({})'.format(cfg))
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return None
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def guess_symbol_dir():
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""" Tries to figure out where libraries are.
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Only used if we failed to find the kicad_common file. """
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dir = os.environ.get('KICAD_SYMBOL_DIR')
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if dir and os.path.isdir(dir):
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return dir
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system = platform.system()
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share = os.path.join('share', 'kicad', 'library')
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if system == 'Linux':
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scheme_names = sysconfig.get_scheme_names()
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# Try in local dir
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if 'posix_user' in scheme_names:
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dir = os.path.join(sysconfig.get_path('data', 'posix_user'), share)
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if os.path.isdir(dir):
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return dir
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# Try at system level
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if 'posix_prefix' in scheme_names:
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dir = os.path.join(sysconfig.get_path('data', 'posix_prefix'), share)
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if os.path.isdir(dir):
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return dir
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elif system == 'Darwin': # pragma: no cover
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app_data = os.path.join('Library', 'Application Support', 'kicad', 'library')
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home = os.environ.get('HOME')
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if home:
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dir = os.path.join(home, app_data)
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if os.path.isdir(dir):
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return dir
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dir = os.path.join('/', app_data)
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if os.path.isdir(dir):
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return dir
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elif system == 'Windows': # pragma: no cover
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dir = os.path.join('C:', 'Program Files', 'KiCad', share)
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if os.path.isdir(dir):
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return dir
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dir = os.path.join('C:', 'KiCad', share)
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if os.path.isdir(dir):
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return dir
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username = os.environ.get('username')
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dir = os.path.join('C:', 'Users', username, 'Documents', 'KiCad', 'library')
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if os.path.isdir(dir):
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return dir
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return None
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def load_kicad_common():
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# Try to figure out KiCad configuration file
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cfg = KiConf.find_kicad_common()
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if cfg and os.path.isfile(cfg):
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logger.debug('Reading KiCad config from `{}`'.format(cfg))
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KiConf.config_dir = os.path.dirname(cfg)
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# Load the "environment variables"
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with open(cfg, 'rt') as f:
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buf = f.read()
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io_buf = StringIO('[Default]\n'+buf)
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cf = ConfigParser.RawConfigParser(allow_no_value=True)
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cf.optionxform = str
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cf.readfp(io_buf, cfg)
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if 'EnvironmentVariables' not in cf.sections():
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logger.warning(W_NOKIENV + 'KiCad config without EnvironmentVariables section')
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else:
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for k, v in cf.items('EnvironmentVariables'):
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if GS.debug_level > 1:
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logger.debug('- KiCad var: {}="{}"'.format(k, v))
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KiConf.kicad_env[k] = v
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if 'KICAD_SYMBOL_DIR' in KiConf.kicad_env:
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KiConf.sym_lib_dir = KiConf.kicad_env['KICAD_SYMBOL_DIR']
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else:
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sym_dir = KiConf.guess_symbol_dir()
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if sym_dir:
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KiConf.kicad_env['KICAD_SYMBOL_DIR'] = sym_dir
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KiConf.sym_lib_dir = sym_dir
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logger.debug('Detected KICAD_SYMBOL_DIR="{}"'.format(sym_dir))
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else:
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logger.warning(W_NOLIBS + 'Unable to find KiCad libraries')
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def load_lib_aliases(fname):
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if not os.path.isfile(fname):
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return
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logger.debug('Loading symbols lib table `{}`'.format(fname))
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with open(fname, 'rt') as f:
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line = f.readline().strip()
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if line != '(sym_lib_table':
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raise KiConfError('Symbol libs table missing signature', SYM_LIB_TABLE, 1, line)
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line = f.readline()
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cline = 2
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while line and line[0] != ')':
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m = re.match(r'\s*\(lib\s*(.*)\)', line)
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if m:
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alias = LibAlias.parse(m.group(1), cline, KiConf.kicad_env)
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if GS.debug_level > 1:
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logger.debug('- Adding lib alias '+str(alias))
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KiConf.lib_aliases[alias.name] = alias
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else:
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raise KiConfError('Unknown symbol table entry', SYM_LIB_TABLE, cline, line)
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line = f.readline()
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cline += 1
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def load_all_lib_aliases():
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# Load the default symbol libs table.
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# This is the list of libraries enabled by the user.
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if KiConf.config_dir:
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KiConf.load_lib_aliases(os.path.join(KiConf.config_dir, SYM_LIB_TABLE))
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else:
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logger.warning(W_NODEFSYMLIB + 'Missing default symbol library table')
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# No default symbol libs table, try to create one
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if KiConf.sym_lib_dir:
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for f in glob(os.path.join(KiConf.sym_lib_dir, '*.lib')):
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alias = LibAlias()
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alias.name = os.path.splitext(os.path.basename(f))[0]
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alias.uri = f
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if GS.debug_level > 1:
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logger.debug('Detected lib alias '+str(alias))
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KiConf.lib_aliases[alias.name] = alias
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# Load the project's table
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KiConf.load_lib_aliases(os.path.join(KiConf.dirname, SYM_LIB_TABLE))
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