blob: 62ec214762171dc92668b6678b43f1fc1b8692df [file] [log] [blame]
"""
BitBake 'Data' implementations
Functions for interacting with the data structure used by the
BitBake build tools.
The expandKeys and update_data are the most expensive
operations. At night the cookie monster came by and
suggested 'give me cookies on setting the variables and
things will work out'. Taking this suggestion into account
applying the skills from the not yet passed 'Entwurf und
Analyse von Algorithmen' lecture and the cookie
monster seems to be right. We will track setVar more carefully
to have faster update_data and expandKeys operations.
This is a trade-off between speed and memory again but
the speed is more critical here.
"""
# Copyright (C) 2003, 2004 Chris Larson
# Copyright (C) 2005 Holger Hans Peter Freyther
#
# SPDX-License-Identifier: GPL-2.0-only
#
# Based on functions from the base bb module, Copyright 2003 Holger Schurig
import sys, os, re
import hashlib
if sys.argv[0][-5:] == "pydoc":
path = os.path.dirname(os.path.dirname(sys.argv[1]))
else:
path = os.path.dirname(os.path.dirname(sys.argv[0]))
sys.path.insert(0, path)
from itertools import groupby
from bb import data_smart
from bb import codeparser
import bb
logger = data_smart.logger
_dict_type = data_smart.DataSmart
def init():
"""Return a new object representing the Bitbake data"""
return _dict_type()
def init_db(parent = None):
"""Return a new object representing the Bitbake data,
optionally based on an existing object"""
if parent is not None:
return parent.createCopy()
else:
return _dict_type()
def createCopy(source):
"""Link the source set to the destination
If one does not find the value in the destination set,
search will go on to the source set to get the value.
Value from source are copy-on-write. i.e. any try to
modify one of them will end up putting the modified value
in the destination set.
"""
return source.createCopy()
def initVar(var, d):
"""Non-destructive var init for data structure"""
d.initVar(var)
def keys(d):
"""Return a list of keys in d"""
return d.keys()
__expand_var_regexp__ = re.compile(r"\${[^{}]+}")
__expand_python_regexp__ = re.compile(r"\${@.+?}")
def expand(s, d, varname = None):
"""Variable expansion using the data store"""
return d.expand(s, varname)
def expandKeys(alterdata, readdata = None):
if readdata is None:
readdata = alterdata
todolist = {}
for key in alterdata:
if not '${' in key:
continue
ekey = expand(key, readdata)
if key == ekey:
continue
todolist[key] = ekey
# These two for loops are split for performance to maximise the
# usefulness of the expand cache
for key in sorted(todolist):
ekey = todolist[key]
newval = alterdata.getVar(ekey, False)
if newval is not None:
val = alterdata.getVar(key, False)
if val is not None:
bb.warn("Variable key %s (%s) replaces original key %s (%s)." % (key, val, ekey, newval))
alterdata.renameVar(key, ekey)
def inheritFromOS(d, savedenv, permitted):
"""Inherit variables from the initial environment."""
exportlist = bb.utils.preserved_envvars_exported()
for s in savedenv.keys():
if s in permitted:
try:
d.setVar(s, savedenv.getVar(s), op = 'from env')
if s in exportlist:
d.setVarFlag(s, "export", True, op = 'auto env export')
except TypeError:
pass
def emit_var(var, o=sys.__stdout__, d = init(), all=False):
"""Emit a variable to be sourced by a shell."""
func = d.getVarFlag(var, "func", False)
if d.getVarFlag(var, 'python', False) and func:
return False
export = d.getVarFlag(var, "export", False)
unexport = d.getVarFlag(var, "unexport", False)
if not all and not export and not unexport and not func:
return False
try:
if all:
oval = d.getVar(var, False)
val = d.getVar(var)
except (KeyboardInterrupt):
raise
except Exception as exc:
o.write('# expansion of %s threw %s: %s\n' % (var, exc.__class__.__name__, str(exc)))
return False
if all:
d.varhistory.emit(var, oval, val, o, d)
if (var.find("-") != -1 or var.find(".") != -1 or var.find('{') != -1 or var.find('}') != -1 or var.find('+') != -1) and not all:
return False
varExpanded = d.expand(var)
if unexport:
o.write('unset %s\n' % varExpanded)
return False
if val is None:
return False
val = str(val)
if varExpanded.startswith("BASH_FUNC_"):
varExpanded = varExpanded[10:-2]
val = val[3:] # Strip off "() "
o.write("%s() %s\n" % (varExpanded, val))
o.write("export -f %s\n" % (varExpanded))
return True
if func:
# Write a comment indicating where the shell function came from (line number and filename) to make it easier
# for the user to diagnose task failures. This comment is also used by build.py to determine the metadata
# location of shell functions.
o.write("# line: {0}, file: {1}\n".format(
d.getVarFlag(var, "lineno", False),
d.getVarFlag(var, "filename", False)))
# NOTE: should probably check for unbalanced {} within the var
val = val.rstrip('\n')
o.write("%s() {\n%s\n}\n" % (varExpanded, val))
return 1
if export:
o.write('export ')
# if we're going to output this within doublequotes,
# to a shell, we need to escape the quotes in the var
alter = re.sub('"', '\\"', val)
alter = re.sub('\n', ' \\\n', alter)
alter = re.sub('\\$', '\\\\$', alter)
o.write('%s="%s"\n' % (varExpanded, alter))
return False
def emit_env(o=sys.__stdout__, d = init(), all=False):
"""Emits all items in the data store in a format such that it can be sourced by a shell."""
isfunc = lambda key: bool(d.getVarFlag(key, "func", False))
keys = sorted((key for key in d.keys() if not key.startswith("__")), key=isfunc)
grouped = groupby(keys, isfunc)
for isfunc, keys in grouped:
for key in sorted(keys):
emit_var(key, o, d, all and not isfunc) and o.write('\n')
def exported_keys(d):
return (key for key in d.keys() if not key.startswith('__') and
d.getVarFlag(key, 'export', False) and
not d.getVarFlag(key, 'unexport', False))
def exported_vars(d):
k = list(exported_keys(d))
for key in k:
try:
value = d.getVar(key)
except Exception as err:
bb.warn("%s: Unable to export ${%s}: %s" % (d.getVar("FILE"), key, err))
continue
if value is not None:
yield key, str(value)
def emit_func(func, o=sys.__stdout__, d = init()):
"""Emits all items in the data store in a format such that it can be sourced by a shell."""
keys = (key for key in d.keys() if not key.startswith("__") and not d.getVarFlag(key, "func", False))
for key in sorted(keys):
emit_var(key, o, d, False)
o.write('\n')
emit_var(func, o, d, False) and o.write('\n')
newdeps = bb.codeparser.ShellParser(func, logger).parse_shell(d.getVar(func))
newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
seen = set()
while newdeps:
deps = newdeps
seen |= deps
newdeps = set()
for dep in sorted(deps):
if d.getVarFlag(dep, "func", False) and not d.getVarFlag(dep, "python", False):
emit_var(dep, o, d, False) and o.write('\n')
newdeps |= bb.codeparser.ShellParser(dep, logger).parse_shell(d.getVar(dep))
newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
newdeps -= seen
_functionfmt = """
def {function}(d):
{body}"""
def emit_func_python(func, o=sys.__stdout__, d = init()):
"""Emits all items in the data store in a format such that it can be sourced by a shell."""
def write_func(func, o, call = False):
body = d.getVar(func, False)
if not body.startswith("def"):
body = _functionfmt.format(function=func, body=body)
o.write(body.strip() + "\n\n")
if call:
o.write(func + "(d)" + "\n\n")
write_func(func, o, True)
pp = bb.codeparser.PythonParser(func, logger)
pp.parse_python(d.getVar(func, False))
newdeps = pp.execs
newdeps |= set((d.getVarFlag(func, "vardeps") or "").split())
seen = set()
while newdeps:
deps = newdeps
seen |= deps
newdeps = set()
for dep in deps:
if d.getVarFlag(dep, "func", False) and d.getVarFlag(dep, "python", False):
write_func(dep, o)
pp = bb.codeparser.PythonParser(dep, logger)
pp.parse_python(d.getVar(dep, False))
newdeps |= pp.execs
newdeps |= set((d.getVarFlag(dep, "vardeps") or "").split())
newdeps -= seen
def update_data(d):
"""Performs final steps upon the datastore, including application of overrides"""
d.finalize(parent = True)
def build_dependencies(key, keys, shelldeps, varflagsexcl, ignored_vars, d):
deps = set()
try:
if key[-1] == ']':
vf = key[:-1].split('[')
value, parser = d.getVarFlag(vf[0], vf[1], False, retparser=True)
deps |= parser.references
deps = deps | (keys & parser.execs)
return deps, value
varflags = d.getVarFlags(key, ["vardeps", "vardepvalue", "vardepsexclude", "exports", "postfuncs", "prefuncs", "lineno", "filename"]) or {}
vardeps = varflags.get("vardeps")
exclusions = varflags.get("vardepsexclude", "").split()
def handle_contains(value, contains, exclusions, d):
newvalue = []
if value:
newvalue.append(str(value))
for k in sorted(contains):
if k in exclusions or k in ignored_vars:
continue
l = (d.getVar(k) or "").split()
for item in sorted(contains[k]):
for word in item.split():
if not word in l:
newvalue.append("\n%s{%s} = Unset" % (k, item))
break
else:
newvalue.append("\n%s{%s} = Set" % (k, item))
return "".join(newvalue)
def handle_remove(value, deps, removes, d):
for r in sorted(removes):
r2 = d.expandWithRefs(r, None)
value += "\n_remove of %s" % r
deps |= r2.references
deps = deps | (keys & r2.execs)
return value
if "vardepvalue" in varflags:
value = varflags.get("vardepvalue")
elif varflags.get("func"):
if varflags.get("python"):
value = d.getVarFlag(key, "_content", False)
parser = bb.codeparser.PythonParser(key, logger)
parser.parse_python(value, filename=varflags.get("filename"), lineno=varflags.get("lineno"))
deps = deps | parser.references
deps = deps | (keys & parser.execs)
value = handle_contains(value, parser.contains, exclusions, d)
else:
value, parsedvar = d.getVarFlag(key, "_content", False, retparser=True)
parser = bb.codeparser.ShellParser(key, logger)
parser.parse_shell(parsedvar.value)
deps = deps | shelldeps
deps = deps | parsedvar.references
deps = deps | (keys & parser.execs) | (keys & parsedvar.execs)
value = handle_contains(value, parsedvar.contains, exclusions, d)
if hasattr(parsedvar, "removes"):
value = handle_remove(value, deps, parsedvar.removes, d)
if vardeps is None:
parser.log.flush()
if "prefuncs" in varflags:
deps = deps | set(varflags["prefuncs"].split())
if "postfuncs" in varflags:
deps = deps | set(varflags["postfuncs"].split())
if "exports" in varflags:
deps = deps | set(varflags["exports"].split())
else:
value, parser = d.getVarFlag(key, "_content", False, retparser=True)
deps |= parser.references
deps = deps | (keys & parser.execs)
value = handle_contains(value, parser.contains, exclusions, d)
if hasattr(parser, "removes"):
value = handle_remove(value, deps, parser.removes, d)
if "vardepvalueexclude" in varflags:
exclude = varflags.get("vardepvalueexclude")
for excl in exclude.split('|'):
if excl:
value = value.replace(excl, '')
# Add varflags, assuming an exclusion list is set
if varflagsexcl:
varfdeps = []
for f in varflags:
if f not in varflagsexcl:
varfdeps.append('%s[%s]' % (key, f))
if varfdeps:
deps |= set(varfdeps)
deps |= set((vardeps or "").split())
deps -= set(exclusions)
except bb.parse.SkipRecipe:
raise
except Exception as e:
bb.warn("Exception during build_dependencies for %s" % key)
raise
return deps, value
#bb.note("Variable %s references %s and calls %s" % (key, str(deps), str(execs)))
#d.setVarFlag(key, "vardeps", deps)
def generate_dependencies(d, ignored_vars):
keys = set(key for key in d if not key.startswith("__"))
shelldeps = set(key for key in d.getVar("__exportlist", False) if d.getVarFlag(key, "export", False) and not d.getVarFlag(key, "unexport", False))
varflagsexcl = d.getVar('BB_SIGNATURE_EXCLUDE_FLAGS')
deps = {}
values = {}
tasklist = d.getVar('__BBTASKS', False) or []
for task in tasklist:
deps[task], values[task] = build_dependencies(task, keys, shelldeps, varflagsexcl, ignored_vars, d)
newdeps = deps[task]
seen = set()
while newdeps:
nextdeps = newdeps - ignored_vars
seen |= nextdeps
newdeps = set()
for dep in nextdeps:
if dep not in deps:
deps[dep], values[dep] = build_dependencies(dep, keys, shelldeps, varflagsexcl, ignored_vars, d)
newdeps |= deps[dep]
newdeps -= seen
#print "For %s: %s" % (task, str(deps[task]))
return tasklist, deps, values
def generate_dependency_hash(tasklist, gendeps, lookupcache, ignored_vars, fn):
taskdeps = {}
basehash = {}
for task in tasklist:
data = lookupcache[task]
if data is None:
bb.error("Task %s from %s seems to be empty?!" % (task, fn))
data = []
else:
data = [data]
gendeps[task] -= ignored_vars
newdeps = gendeps[task]
seen = set()
while newdeps:
nextdeps = newdeps
seen |= nextdeps
newdeps = set()
for dep in nextdeps:
if dep in ignored_vars:
continue
gendeps[dep] -= ignored_vars
newdeps |= gendeps[dep]
newdeps -= seen
alldeps = sorted(seen)
for dep in alldeps:
data.append(dep)
var = lookupcache[dep]
if var is not None:
data.append(str(var))
k = fn + ":" + task
basehash[k] = hashlib.sha256("".join(data).encode("utf-8")).hexdigest()
taskdeps[task] = alldeps
return taskdeps, basehash
def inherits_class(klass, d):
val = d.getVar('__inherit_cache', False) or []
needle = os.path.join('classes', '%s.bbclass' % klass)
for v in val:
if v.endswith(needle):
return True
return False