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"""
BitBake Parsers
File parsers for the BitBake build tools.
"""
# Copyright (C) 2003, 2004 Chris Larson
# Copyright (C) 2003, 2004 Phil Blundell
#
# SPDX-License-Identifier: GPL-2.0-only
#
# Based on functions from the base bb module, Copyright 2003 Holger Schurig
#
handlers = []
import errno
import logging
import os
import stat
import bb
import bb.utils
import bb.siggen
logger = logging.getLogger("BitBake.Parsing")
class ParseError(Exception):
"""Exception raised when parsing fails"""
def __init__(self, msg, filename, lineno=0):
self.msg = msg
self.filename = filename
self.lineno = lineno
Exception.__init__(self, msg, filename, lineno)
def __str__(self):
if self.lineno:
return "ParseError at %s:%d: %s" % (self.filename, self.lineno, self.msg)
else:
return "ParseError in %s: %s" % (self.filename, self.msg)
class SkipRecipe(Exception):
"""Exception raised to skip this recipe"""
class SkipPackage(SkipRecipe):
"""Exception raised to skip this recipe (use SkipRecipe in new code)"""
__mtime_cache = {}
def cached_mtime(f):
if f not in __mtime_cache:
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
return __mtime_cache[f]
def cached_mtime_noerror(f):
if f not in __mtime_cache:
try:
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
except OSError:
return 0
return __mtime_cache[f]
def check_mtime(f, mtime):
try:
res = os.stat(f)
current_mtime = (res.st_mtime_ns, res.st_size, res.st_ino)
__mtime_cache[f] = current_mtime
except OSError:
current_mtime = 0
return current_mtime == mtime
def update_mtime(f):
try:
res = os.stat(f)
__mtime_cache[f] = (res.st_mtime_ns, res.st_size, res.st_ino)
except OSError:
if f in __mtime_cache:
del __mtime_cache[f]
return 0
return __mtime_cache[f]
def update_cache(f):
if f in __mtime_cache:
logger.debug("Updating mtime cache for %s" % f)
update_mtime(f)
def clear_cache():
global __mtime_cache
__mtime_cache = {}
def mark_dependency(d, f):
if f.startswith('./'):
f = "%s/%s" % (os.getcwd(), f[2:])
deps = (d.getVar('__depends', False) or [])
s = (f, cached_mtime_noerror(f))
if s not in deps:
deps.append(s)
d.setVar('__depends', deps)
def check_dependency(d, f):
s = (f, cached_mtime_noerror(f))
deps = (d.getVar('__depends', False) or [])
return s in deps
def supports(fn, data):
"""Returns true if we have a handler for this file, false otherwise"""
for h in handlers:
if h['supports'](fn, data):
return 1
return 0
def handle(fn, data, include=0, baseconfig=False):
"""Call the handler that is appropriate for this file"""
for h in handlers:
if h['supports'](fn, data):
with data.inchistory.include(fn):
return h['handle'](fn, data, include, baseconfig)
raise ParseError("not a BitBake file", fn)
def init(fn, data):
for h in handlers:
if h['supports'](fn):
return h['init'](data)
def init_parser(d):
if hasattr(bb.parse, "siggen"):
bb.parse.siggen.exit()
bb.parse.siggen = bb.siggen.init(d)
def resolve_file(fn, d):
if not os.path.isabs(fn):
bbpath = d.getVar("BBPATH")
newfn, attempts = bb.utils.which(bbpath, fn, history=True)
for af in attempts:
mark_dependency(d, af)
if not newfn:
raise IOError(errno.ENOENT, "file %s not found in %s" % (fn, bbpath))
fn = newfn
else:
mark_dependency(d, fn)
if not os.path.isfile(fn):
raise IOError(errno.ENOENT, "file %s not found" % fn)
return fn
# Used by OpenEmbedded metadata
__pkgsplit_cache__={}
def vars_from_file(mypkg, d):
if not mypkg or not mypkg.endswith((".bb", ".bbappend")):
return (None, None, None)
if mypkg in __pkgsplit_cache__:
return __pkgsplit_cache__[mypkg]
myfile = os.path.splitext(os.path.basename(mypkg))
parts = myfile[0].split('_')
__pkgsplit_cache__[mypkg] = parts
if len(parts) > 3:
raise ParseError("Unable to generate default variables from filename (too many underscores)", mypkg)
exp = 3 - len(parts)
tmplist = []
while exp != 0:
exp -= 1
tmplist.append(None)
parts.extend(tmplist)
return parts
def get_file_depends(d):
'''Return the dependent files'''
dep_files = []
depends = d.getVar('__base_depends', False) or []
depends = depends + (d.getVar('__depends', False) or [])
for (fn, _) in depends:
dep_files.append(os.path.abspath(fn))
return " ".join(dep_files)
def vardeps(*varnames):
"""
Function decorator that can be used to instruct the bitbake dependency
parsing to add a dependency on the specified variables names
Example:
@bb.parse.vardeps("FOO", "BAR")
def my_function():
...
"""
def inner(f):
if not hasattr(f, "bb_vardeps"):
f.bb_vardeps = set()
f.bb_vardeps |= set(varnames)
return f
return inner
def vardepsexclude(*varnames):
"""
Function decorator that can be used to instruct the bitbake dependency
parsing to ignore dependencies on the specified variable names in the code
Example:
@bb.parse.vardepsexclude("FOO", "BAR")
def my_function():
...
"""
def inner(f):
if not hasattr(f, "bb_vardepsexclude"):
f.bb_vardepsexclude = set()
f.bb_vardepsexclude |= set(varnames)
return f
return inner
from bb.parse.parse_py import __version__, ConfHandler, BBHandler
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