mirror of
git://git.yoctoproject.org/poky.git
synced 2025-07-19 12:39:02 +02:00
0d49931755
Currently, if a pylib function changes contents, the taskhash remains unchanged since we assume the functions have stable output. This is probably a poor assumption so take the code of the function into account in the taskhashes. This avoids certain frustrating build failures we've been seeing in automated testing. To make this work we have to add an extra entry to the python code parsing cache so that we can store the hashed function contents for efficiency as in the python module case, that isn't used as the key to the cache. The cache version changes since we're adding data to the cache. (Bitbake rev: b2c3438ebe62793ebabe2c282534893908d520b4) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
449 lines
16 KiB
Python
449 lines
16 KiB
Python
"""
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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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expandKeys and datastore iteration are the most expensive
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operations. Updating overrides is now "on the fly" but still based
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on the idea of the cookie monster introduced by zecke:
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"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 datastore 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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# SPDX-License-Identifier: GPL-2.0-only
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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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import hashlib
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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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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 is 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 = bb.utils.to_boolean(d.getVarFlag(var, "export"))
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unexport = bb.utils.to_boolean(d.getVarFlag(var, "unexport"))
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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):
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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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# Write a comment indicating where the shell function came from (line number and filename) to make it easier
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# for the user to diagnose task failures. This comment is also used by build.py to determine the metadata
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# location of shell functions.
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o.write("# line: {0}, file: {1}\n".format(
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d.getVarFlag(var, "lineno", False),
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d.getVarFlag(var, "filename", False)))
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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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bb.utils.to_boolean(d.getVarFlag(key, 'export')) and
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not bb.utils.to_boolean(d.getVarFlag(key, 'unexport')))
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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 sorted(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 build_dependencies(key, keys, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparsedata):
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def handle_contains(value, contains, exclusions, d):
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newvalue = []
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if value:
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newvalue.append(str(value))
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for k in sorted(contains):
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if k in exclusions or k in ignored_vars:
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continue
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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.append("\n%s{%s} = Unset" % (k, item))
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break
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else:
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newvalue.append("\n%s{%s} = Set" % (k, item))
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return "".join(newvalue)
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def handle_remove(value, deps, removes, d):
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for r in sorted(removes):
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r2 = d.expandWithRefs(r, None)
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value += "\n_remove of %s" % r
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deps |= r2.references
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deps = deps | (keys & r2.execs)
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value = handle_contains(value, r2.contains, exclusions, d)
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return value
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deps = set()
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try:
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if key in mod_funcs:
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exclusions = set()
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moddep = bb.codeparser.modulecode_deps[key]
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value = handle_contains(moddep[4], moddep[3], exclusions, d)
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return frozenset((moddep[0] | keys & moddep[1]) - ignored_vars), value
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if key[-1] == ']':
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vf = key[:-1].split('[')
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if vf[1] == "vardepvalueexclude":
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return deps, ""
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value, parser = d.getVarFlag(vf[0], vf[1], False, retparser=True)
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deps |= parser.references
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deps = deps | (keys & parser.execs)
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deps -= ignored_vars
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return frozenset(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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exclusions = varflags.get("vardepsexclude", "").split()
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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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value = codeparsedata.getVarFlag(key, "_content", False)
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parser = bb.codeparser.PythonParser(key, logger)
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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, exclusions, d)
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else:
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value, parsedvar = codeparsedata.getVarFlag(key, "_content", False, retparser=True)
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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, exclusions, d)
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if hasattr(parsedvar, "removes"):
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value = handle_remove(value, deps, parsedvar.removes, 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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value, parser = d.getVarFlag(key, "_content", False, retparser=True)
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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, exclusions, d)
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if hasattr(parser, "removes"):
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value = handle_remove(value, deps, parser.removes, 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(exclusions)
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deps -= ignored_vars
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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 frozenset(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, ignored_vars):
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mod_funcs = set(bb.codeparser.modulecode_deps.keys())
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keys = set(key for key in d if not key.startswith("__")) | mod_funcs
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shelldeps = set(key for key in d.getVar("__exportlist", False) if bb.utils.to_boolean(d.getVarFlag(key, "export")) and not bb.utils.to_boolean(d.getVarFlag(key, "unexport")))
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varflagsexcl = d.getVar('BB_SIGNATURE_EXCLUDE_FLAGS')
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codeparserd = d.createCopy()
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for forced in (d.getVar('BB_HASH_CODEPARSER_VALS') or "").split():
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key, value = forced.split("=", 1)
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codeparserd.setVar(key, value)
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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, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparserd)
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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, mod_funcs, shelldeps, varflagsexcl, ignored_vars, d, codeparserd)
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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 generate_dependency_hash(tasklist, gendeps, lookupcache, ignored_vars, fn):
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taskdeps = {}
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basehash = {}
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for task in tasklist:
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data = lookupcache[task]
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if data is None:
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bb.error("Task %s from %s seems to be empty?!" % (task, fn))
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data = []
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else:
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data = [data]
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newdeps = gendeps[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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newdeps |= gendeps[dep]
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newdeps -= seen
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alldeps = sorted(seen)
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for dep in alldeps:
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data.append(dep)
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var = lookupcache[dep]
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if var is not None:
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data.append(str(var))
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k = fn + ":" + task
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basehash[k] = hashlib.sha256("".join(data).encode("utf-8")).hexdigest()
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taskdeps[task] = frozenset(seen)
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return taskdeps, basehash
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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 = '/%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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