404 lines
14 KiB
Python
404 lines
14 KiB
Python
# ex:ts=4:sw=4:sts=4:et
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# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
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"""
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BitBake 'Data' implementations
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Functions for interacting with the data structure used by the
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BitBake build tools.
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The expandKeys and update_data are the most expensive
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operations. At night the cookie monster came by and
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suggested 'give me cookies on setting the variables and
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things will work out'. Taking this suggestion into account
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applying the skills from the not yet passed 'Entwurf und
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Analyse von Algorithmen' lecture and the cookie
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monster seems to be right. We will track setVar more carefully
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to have faster update_data and expandKeys operations.
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This is a trade-off between speed and memory again but
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the speed is more critical here.
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"""
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# Copyright (C) 2003, 2004 Chris Larson
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# Copyright (C) 2005 Holger Hans Peter Freyther
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Based on functions from the base bb module, Copyright 2003 Holger Schurig
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import sys, os, re
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if sys.argv[0][-5:] == "pydoc":
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path = os.path.dirname(os.path.dirname(sys.argv[1]))
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else:
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path = os.path.dirname(os.path.dirname(sys.argv[0]))
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sys.path.insert(0, path)
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from itertools import groupby
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from bb import data_smart
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from bb import codeparser
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import bb
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logger = data_smart.logger
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_dict_type = data_smart.DataSmart
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def init():
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"""Return a new object representing the Bitbake data"""
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return _dict_type()
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def init_db(parent = None):
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"""Return a new object representing the Bitbake data,
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optionally based on an existing object"""
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if parent is not None:
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return parent.createCopy()
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else:
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return _dict_type()
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def createCopy(source):
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"""Link the source set to the destination
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If one does not find the value in the destination set,
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search will go on to the source set to get the value.
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Value from source are copy-on-write. i.e. any try to
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modify one of them will end up putting the modified value
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in the destination set.
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"""
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return source.createCopy()
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def initVar(var, d):
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"""Non-destructive var init for data structure"""
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d.initVar(var)
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def keys(d):
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"""Return a list of keys in d"""
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return d.keys()
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__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
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__expand_python_regexp__ = re.compile(r"\${@.+?}")
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def expand(s, d, varname = None):
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"""Variable expansion using the data store"""
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return d.expand(s, varname)
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def expandKeys(alterdata, readdata = None):
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if readdata == None:
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readdata = alterdata
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todolist = {}
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for key in alterdata:
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if not '${' in key:
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continue
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ekey = expand(key, readdata)
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if key == ekey:
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continue
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todolist[key] = ekey
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# These two for loops are split for performance to maximise the
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# usefulness of the expand cache
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for key in sorted(todolist):
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ekey = todolist[key]
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newval = alterdata.getVar(ekey, False)
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if newval is not None:
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val = alterdata.getVar(key, False)
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if val is not None:
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bb.warn("Variable key %s (%s) replaces original key %s (%s)." % (key, val, ekey, newval))
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alterdata.renameVar(key, ekey)
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def inheritFromOS(d, savedenv, permitted):
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"""Inherit variables from the initial environment."""
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exportlist = bb.utils.preserved_envvars_exported()
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for s in savedenv.keys():
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if s in permitted:
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try:
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d.setVar(s, savedenv.getVar(s), op = 'from env')
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if s in exportlist:
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d.setVarFlag(s, "export", True, op = 'auto env export')
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except TypeError:
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pass
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def emit_var(var, o=sys.__stdout__, d = init(), all=False):
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"""Emit a variable to be sourced by a shell."""
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func = d.getVarFlag(var, "func", False)
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if d.getVarFlag(var, 'python', False) and func:
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return False
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export = d.getVarFlag(var, "export", False)
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unexport = d.getVarFlag(var, "unexport", False)
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if not all and not export and not unexport and not func:
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return False
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try:
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if all:
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oval = d.getVar(var, False)
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val = d.getVar(var)
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except (KeyboardInterrupt, bb.build.FuncFailed):
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raise
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except Exception as exc:
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o.write('# expansion of %s threw %s: %s\n' % (var, exc.__class__.__name__, str(exc)))
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return False
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if all:
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d.varhistory.emit(var, oval, val, o, d)
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if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
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return False
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varExpanded = d.expand(var)
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if unexport:
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o.write('unset %s\n' % varExpanded)
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return False
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if val is None:
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return False
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val = str(val)
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if varExpanded.startswith("BASH_FUNC_"):
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varExpanded = varExpanded[10:-2]
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val = val[3:] # Strip off "() "
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o.write("%s() %s\n" % (varExpanded, val))
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o.write("export -f %s\n" % (varExpanded))
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return True
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if func:
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# NOTE: should probably check for unbalanced {} within the var
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val = val.rstrip('\n')
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o.write("%s() {\n%s\n}\n" % (varExpanded, val))
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return 1
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if export:
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o.write('export ')
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# if we're going to output this within doublequotes,
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# to a shell, we need to escape the quotes in the var
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alter = re.sub('"', '\\"', val)
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alter = re.sub('\n', ' \\\n', alter)
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alter = re.sub('\\$', '\\\\$', alter)
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o.write('%s="%s"\n' % (varExpanded, alter))
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return False
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def emit_env(o=sys.__stdout__, d = init(), all=False):
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"""Emits all items in the data store in a format such that it can be sourced by a shell."""
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isfunc = lambda key: bool(d.getVarFlag(key, "func", False))
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keys = sorted((key for key in d.keys() if not key.startswith("__")), key=isfunc)
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grouped = groupby(keys, isfunc)
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for isfunc, keys in grouped:
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for key in sorted(keys):
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emit_var(key, o, d, all and not isfunc) and o.write('\n')
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def exported_keys(d):
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return (key for key in d.keys() if not key.startswith('__') and
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d.getVarFlag(key, 'export', False) and
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not d.getVarFlag(key, 'unexport', False))
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def exported_vars(d):
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k = list(exported_keys(d))
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for key in k:
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try:
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value = d.getVar(key)
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except Exception as err:
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bb.warn("%s: Unable to export ${%s}: %s" % (d.getVar("FILE"), key, err))
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continue
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if value is not None:
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yield key, str(value)
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def emit_func(func, o=sys.__stdout__, d = init()):
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"""Emits all items in the data store in a format such that it can be sourced by a shell."""
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keys = (key for key in d.keys() if not key.startswith("__") and not d.getVarFlag(key, "func", False))
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for key in sorted(keys):
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emit_var(key, o, d, False)
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o.write('\n')
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emit_var(func, o, d, False) and o.write('\n')
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newdeps = bb.codeparser.ShellParser(func, logger).parse_shell(d.getVar(func))
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newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
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seen = set()
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while newdeps:
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deps = newdeps
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seen |= deps
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newdeps = set()
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for dep in deps:
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if d.getVarFlag(dep, "func", False) and not d.getVarFlag(dep, "python", False):
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emit_var(dep, o, d, False) and o.write('\n')
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newdeps |= bb.codeparser.ShellParser(dep, logger).parse_shell(d.getVar(dep))
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newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
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newdeps -= seen
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_functionfmt = """
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def {function}(d):
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{body}"""
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def emit_func_python(func, o=sys.__stdout__, d = init()):
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"""Emits all items in the data store in a format such that it can be sourced by a shell."""
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def write_func(func, o, call = False):
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body = d.getVar(func, False)
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if not body.startswith("def"):
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body = _functionfmt.format(function=func, body=body)
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o.write(body.strip() + "\n\n")
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if call:
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o.write(func + "(d)" + "\n\n")
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write_func(func, o, True)
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pp = bb.codeparser.PythonParser(func, logger)
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pp.parse_python(d.getVar(func, False))
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newdeps = pp.execs
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newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
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seen = set()
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while newdeps:
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deps = newdeps
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seen |= deps
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newdeps = set()
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for dep in deps:
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if d.getVarFlag(dep, "func", False) and d.getVarFlag(dep, "python", False):
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write_func(dep, o)
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pp = bb.codeparser.PythonParser(dep, logger)
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pp.parse_python(d.getVar(dep, False))
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newdeps |= pp.execs
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newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
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newdeps -= seen
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def update_data(d):
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"""Performs final steps upon the datastore, including application of overrides"""
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d.finalize(parent = True)
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def build_dependencies(key, keys, shelldeps, varflagsexcl, d):
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deps = set()
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try:
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if key[-1] == ']':
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vf = key[:-1].split('[')
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value = d.getVarFlag(vf[0], vf[1], False)
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parser = d.expandWithRefs(value, key)
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deps |= parser.references
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deps = deps | (keys & parser.execs)
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return deps, value
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varflags = d.getVarFlags(key, ["vardeps", "vardepvalue", "vardepsexclude", "exports", "postfuncs", "prefuncs", "lineno", "filename"]) or {}
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vardeps = varflags.get("vardeps")
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value = d.getVarFlag(key, "_content", False)
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def handle_contains(value, contains, d):
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newvalue = ""
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for k in sorted(contains):
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l = (d.getVar(k) or "").split()
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for item in sorted(contains[k]):
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for word in item.split():
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if not word in l:
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newvalue += "\n%s{%s} = Unset" % (k, item)
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break
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else:
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newvalue += "\n%s{%s} = Set" % (k, item)
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if not newvalue:
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return value
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if not value:
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return newvalue
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return value + newvalue
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if "vardepvalue" in varflags:
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value = varflags.get("vardepvalue")
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elif varflags.get("func"):
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if varflags.get("python"):
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parser = bb.codeparser.PythonParser(key, logger)
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if value and "\t" in value:
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logger.warning("Variable %s contains tabs, please remove these (%s)" % (key, d.getVar("FILE")))
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parser.parse_python(value, filename=varflags.get("filename"), lineno=varflags.get("lineno"))
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deps = deps | parser.references
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deps = deps | (keys & parser.execs)
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value = handle_contains(value, parser.contains, d)
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else:
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parsedvar = d.expandWithRefs(value, key)
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parser = bb.codeparser.ShellParser(key, logger)
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parser.parse_shell(parsedvar.value)
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deps = deps | shelldeps
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deps = deps | parsedvar.references
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deps = deps | (keys & parser.execs) | (keys & parsedvar.execs)
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value = handle_contains(value, parsedvar.contains, d)
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if vardeps is None:
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parser.log.flush()
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if "prefuncs" in varflags:
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deps = deps | set(varflags["prefuncs"].split())
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if "postfuncs" in varflags:
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deps = deps | set(varflags["postfuncs"].split())
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if "exports" in varflags:
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deps = deps | set(varflags["exports"].split())
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else:
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parser = d.expandWithRefs(value, key)
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deps |= parser.references
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deps = deps | (keys & parser.execs)
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value = handle_contains(value, parser.contains, d)
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if "vardepvalueexclude" in varflags:
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exclude = varflags.get("vardepvalueexclude")
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for excl in exclude.split('|'):
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if excl:
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value = value.replace(excl, '')
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# Add varflags, assuming an exclusion list is set
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if varflagsexcl:
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varfdeps = []
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for f in varflags:
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if f not in varflagsexcl:
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varfdeps.append('%s[%s]' % (key, f))
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if varfdeps:
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deps |= set(varfdeps)
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deps |= set((vardeps or "").split())
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deps -= set(varflags.get("vardepsexclude", "").split())
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except bb.parse.SkipRecipe:
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raise
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except Exception as e:
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bb.warn("Exception during build_dependencies for %s" % key)
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raise
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return deps, value
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#bb.note("Variable %s references %s and calls %s" % (key, str(deps), str(execs)))
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#d.setVarFlag(key, "vardeps", deps)
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def generate_dependencies(d):
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keys = set(key for key in d if not key.startswith("__"))
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shelldeps = set(key for key in d.getVar("__exportlist", False) if d.getVarFlag(key, "export", False) and not d.getVarFlag(key, "unexport", False))
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varflagsexcl = d.getVar('BB_SIGNATURE_EXCLUDE_FLAGS')
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deps = {}
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values = {}
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tasklist = d.getVar('__BBTASKS', False) or []
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for task in tasklist:
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deps[task], values[task] = build_dependencies(task, keys, shelldeps, varflagsexcl, d)
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newdeps = deps[task]
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seen = set()
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while newdeps:
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nextdeps = newdeps
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seen |= nextdeps
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newdeps = set()
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for dep in nextdeps:
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if dep not in deps:
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deps[dep], values[dep] = build_dependencies(dep, keys, shelldeps, varflagsexcl, d)
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newdeps |= deps[dep]
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newdeps -= seen
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#print "For %s: %s" % (task, str(deps[task]))
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return tasklist, deps, values
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def inherits_class(klass, d):
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val = d.getVar('__inherit_cache', False) or []
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needle = os.path.join('classes', '%s.bbclass' % klass)
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for v in val:
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if v.endswith(needle):
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return True
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return False
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