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|
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake Utility Functions
"""
# Copyright (C) 2004 Michael Lauer
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import re, fcntl, os, string, stat, shutil, time
import sys
import errno
import logging
import bb
import bb.msg
import multiprocessing
from commands import getstatusoutput
from contextlib import contextmanager
logger = logging.getLogger("BitBake.Util")
# Context used in better_exec, eval
_context = {
"os": os,
"bb": bb,
"time": time,
}
def explode_version(s):
r = []
alpha_regexp = re.compile('^([a-zA-Z]+)(.*)$')
numeric_regexp = re.compile('^(\d+)(.*)$')
while (s != ''):
if s[0] in string.digits:
m = numeric_regexp.match(s)
r.append((0, int(m.group(1))))
s = m.group(2)
continue
if s[0] in string.letters:
m = alpha_regexp.match(s)
r.append((1, m.group(1)))
s = m.group(2)
continue
if s[0] == '~':
r.append((-1, s[0]))
else:
r.append((2, s[0]))
s = s[1:]
return r
def split_version(s):
"""Split a version string into its constituent parts (PE, PV, PR)"""
s = s.strip(" <>=")
e = 0
if s.count(':'):
e = int(s.split(":")[0])
s = s.split(":")[1]
r = ""
if s.count('-'):
r = s.rsplit("-", 1)[1]
s = s.rsplit("-", 1)[0]
v = s
return (e, v, r)
def vercmp_part(a, b):
va = explode_version(a)
vb = explode_version(b)
while True:
if va == []:
(oa, ca) = (0, None)
else:
(oa, ca) = va.pop(0)
if vb == []:
(ob, cb) = (0, None)
else:
(ob, cb) = vb.pop(0)
if (oa, ca) == (0, None) and (ob, cb) == (0, None):
return 0
if oa < ob:
return -1
elif oa > ob:
return 1
elif ca < cb:
return -1
elif ca > cb:
return 1
def vercmp(ta, tb):
(ea, va, ra) = ta
(eb, vb, rb) = tb
r = int(ea or 0) - int(eb or 0)
if (r == 0):
r = vercmp_part(va, vb)
if (r == 0):
r = vercmp_part(ra, rb)
return r
_package_weights_ = {"pre":-2, "p":0, "alpha":-4, "beta":-3, "rc":-1} # dicts are unordered
_package_ends_ = ["pre", "p", "alpha", "beta", "rc", "cvs", "bk", "HEAD" ] # so we need ordered list
def relparse(myver):
"""Parses the last elements of a version number into a triplet, that can
later be compared.
"""
number = 0
p1 = 0
p2 = 0
mynewver = myver.split('_')
if len(mynewver) == 2:
# an _package_weights_
number = float(mynewver[0])
match = 0
for x in _package_ends_:
elen = len(x)
if mynewver[1][:elen] == x:
match = 1
p1 = _package_weights_[x]
try:
p2 = float(mynewver[1][elen:])
except:
p2 = 0
break
if not match:
# normal number or number with letter at end
divider = len(myver)-1
if myver[divider:] not in "1234567890":
# letter at end
p1 = ord(myver[divider:])
number = float(myver[0:divider])
else:
number = float(myver)
else:
# normal number or number with letter at end
divider = len(myver)-1
if myver[divider:] not in "1234567890":
#letter at end
p1 = ord(myver[divider:])
number = float(myver[0:divider])
else:
number = float(myver)
return [number, p1, p2]
__vercmp_cache__ = {}
def vercmp_string(val1, val2):
"""This takes two version strings and returns an integer to tell you whether
the versions are the same, val1>val2 or val2>val1.
"""
# quick short-circuit
if val1 == val2:
return 0
valkey = val1 + " " + val2
# cache lookup
try:
return __vercmp_cache__[valkey]
try:
return - __vercmp_cache__[val2 + " " + val1]
except KeyError:
pass
except KeyError:
pass
# consider 1_p2 vc 1.1
# after expansion will become (1_p2,0) vc (1,1)
# then 1_p2 is compared with 1 before 0 is compared with 1
# to solve the bug we need to convert it to (1,0_p2)
# by splitting _prepart part and adding it back _after_expansion
val1_prepart = val2_prepart = ''
if val1.count('_'):
val1, val1_prepart = val1.split('_', 1)
if val2.count('_'):
val2, val2_prepart = val2.split('_', 1)
# replace '-' by '.'
# FIXME: Is it needed? can val1/2 contain '-'?
val1 = val1.split("-")
if len(val1) == 2:
val1[0] = val1[0] + "." + val1[1]
val2 = val2.split("-")
if len(val2) == 2:
val2[0] = val2[0] + "." + val2[1]
val1 = val1[0].split('.')
val2 = val2[0].split('.')
# add back decimal point so that .03 does not become "3" !
for x in xrange(1, len(val1)):
if val1[x][0] == '0' :
val1[x] = '.' + val1[x]
for x in xrange(1, len(val2)):
if val2[x][0] == '0' :
val2[x] = '.' + val2[x]
# extend varion numbers
if len(val2) < len(val1):
val2.extend(["0"]*(len(val1)-len(val2)))
elif len(val1) < len(val2):
val1.extend(["0"]*(len(val2)-len(val1)))
# add back _prepart tails
if val1_prepart:
val1[-1] += '_' + val1_prepart
if val2_prepart:
val2[-1] += '_' + val2_prepart
# The above code will extend version numbers out so they
# have the same number of digits.
for x in xrange(0, len(val1)):
cmp1 = relparse(val1[x])
cmp2 = relparse(val2[x])
for y in xrange(0, 3):
myret = cmp1[y] - cmp2[y]
if myret != 0:
__vercmp_cache__[valkey] = myret
return myret
__vercmp_cache__[valkey] = 0
return 0
def explode_deps(s):
"""
Take an RDEPENDS style string of format:
"DEPEND1 (optional version) DEPEND2 (optional version) ..."
and return a list of dependencies.
Version information is ignored.
"""
r = []
l = s.split()
flag = False
for i in l:
if i[0] == '(':
flag = True
#j = []
if not flag:
r.append(i)
#else:
# j.append(i)
if flag and i.endswith(')'):
flag = False
# Ignore version
#r[-1] += ' ' + ' '.join(j)
return r
def explode_dep_versions(s):
"""
Take an RDEPENDS style string of format:
"DEPEND1 (optional version) DEPEND2 (optional version) ..."
and return a dictionary of dependencies and versions.
"""
r = {}
l = s.replace(",", "").split()
lastdep = None
lastver = ""
inversion = False
for i in l:
if i[0] == '(':
inversion = True
lastver = i[1:] or ""
#j = []
elif inversion and i.endswith(')'):
inversion = False
lastver = lastver + " " + (i[:-1] or "")
r[lastdep] = lastver
elif not inversion:
r[i] = None
lastdep = i
lastver = ""
elif inversion:
lastver = lastver + " " + i
return r
def join_deps(deps, commasep=True):
"""
Take the result from explode_dep_versions and generate a dependency string
"""
result = []
for dep in deps:
if deps[dep]:
result.append(dep + " (" + deps[dep] + ")")
else:
result.append(dep)
if commasep:
return ", ".join(result)
else:
return " ".join(result)
def _print_trace(body, line):
"""
Print the Environment of a Text Body
"""
# print the environment of the method
min_line = max(1, line-4)
max_line = min(line + 4, len(body))
for i in xrange(min_line, max_line + 1):
if line == i:
logger.error(' *** %.4d:%s', i, body[i-1])
else:
logger.error(' %.4d:%s', i, body[i-1])
def better_compile(text, file, realfile, mode = "exec"):
"""
A better compile method. This method
will print the offending lines.
"""
try:
return compile(text, file, mode)
except Exception as e:
# split the text into lines again
body = text.split('\n')
logger.error("Error in compiling python function in %s", realfile)
logger.error(str(e))
if e.lineno:
logger.error("The lines leading to this error were:")
logger.error("\t%d:%s:'%s'", e.lineno, e.__class__.__name__, body[e.lineno-1])
_print_trace(body, e.lineno)
else:
logger.error("The function causing this error was:")
for line in body:
logger.error(line)
raise
def better_exec(code, context, text, realfile = "<code>"):
"""
Similiar to better_compile, better_exec will
print the lines that are responsible for the
error.
"""
import bb.parse
if not hasattr(code, "co_filename"):
code = better_compile(code, realfile, realfile)
try:
exec(code, _context, context)
except Exception:
(t, value, tb) = sys.exc_info()
if t in [bb.parse.SkipPackage, bb.build.FuncFailed]:
raise
import traceback
exception = traceback.format_exception_only(t, value)
logger.error('Error executing a python function in %s:\n%s',
realfile, ''.join(exception))
# Strip 'us' from the stack (better_exec call)
tb = tb.tb_next
textarray = text.split('\n')
linefailed = traceback.tb_lineno(tb)
tbextract = traceback.extract_tb(tb)
tbformat = "\n".join(traceback.format_list(tbextract))
logger.error("The stack trace of python calls that resulted in this exception/failure was:")
for line in tbformat.split('\n'):
logger.error(line)
logger.error("The code that was being executed was:")
_print_trace(textarray, linefailed)
logger.error("(file: '%s', lineno: %s, function: %s)", tbextract[0][0], tbextract[0][1], tbextract[0][2])
# See if this is a function we constructed and has calls back into other functions in
# "text". If so, try and improve the context of the error by diving down the trace
level = 0
nexttb = tb.tb_next
while nexttb is not None:
if tbextract[level][0] == tbextract[level+1][0] and tbextract[level+1][2] == tbextract[level][0]:
_print_trace(textarray, tbextract[level+1][1])
logger.error("(file: '%s', lineno: %s, function: %s)", tbextract[level+1][0], tbextract[level+1][1], tbextract[level+1][2])
else:
break
nexttb = tb.tb_next
level = level + 1
raise
def simple_exec(code, context):
exec(code, _context, context)
def better_eval(source, locals):
return eval(source, _context, locals)
@contextmanager
def fileslocked(files):
"""Context manager for locking and unlocking file locks."""
locks = []
if files:
for lockfile in files:
locks.append(bb.utils.lockfile(lockfile))
yield
for lock in locks:
bb.utils.unlockfile(lock)
def lockfile(name, shared=False, retry=True):
"""
Use the file fn as a lock file, return when the lock has been acquired.
Returns a variable to pass to unlockfile().
"""
dirname = os.path.dirname(name)
mkdirhier(dirname)
if not os.access(dirname, os.W_OK):
logger.error("Unable to acquire lock '%s', directory is not writable",
name)
sys.exit(1)
op = fcntl.LOCK_EX
if shared:
op = fcntl.LOCK_SH
if not retry:
op = op | fcntl.LOCK_NB
while True:
# If we leave the lockfiles lying around there is no problem
# but we should clean up after ourselves. This gives potential
# for races though. To work around this, when we acquire the lock
# we check the file we locked was still the lock file on disk.
# by comparing inode numbers. If they don't match or the lockfile
# no longer exists, we start again.
# This implementation is unfair since the last person to request the
# lock is the most likely to win it.
try:
lf = open(name, 'a+')
fileno = lf.fileno()
fcntl.flock(fileno, op)
statinfo = os.fstat(fileno)
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
lf.close()
except Exception:
pass
if not retry:
return None
def unlockfile(lf):
"""
Unlock a file locked using lockfile()
"""
try:
# If we had a shared lock, we need to promote to exclusive before
# removing the lockfile. Attempt this, ignore failures.
fcntl.flock(lf.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
os.unlink(lf.name)
except (IOError, OSError):
pass
fcntl.flock(lf.fileno(), fcntl.LOCK_UN)
lf.close()
def md5_file(filename):
"""
Return the hex string representation of the MD5 checksum of filename.
"""
try:
import hashlib
m = hashlib.md5()
except ImportError:
import md5
m = md5.new()
for line in open(filename):
m.update(line)
return m.hexdigest()
def sha256_file(filename):
"""
Return the hex string representation of the 256-bit SHA checksum of
filename. On Python 2.4 this will return None, so callers will need to
handle that by either skipping SHA checks, or running a standalone sha256sum
binary.
"""
try:
import hashlib
except ImportError:
return None
s = hashlib.sha256()
for line in open(filename):
s.update(line)
return s.hexdigest()
def preserved_envvars_exported():
"""Variables which are taken from the environment and placed in and exported
from the metadata"""
return [
'BB_TASKHASH',
'HOME',
'LOGNAME',
'PATH',
'PWD',
'SHELL',
'TERM',
'USER',
]
def preserved_envvars_exported_interactive():
"""Variables which are taken from the environment and placed in and exported
from the metadata, for interactive tasks"""
return [
'COLORTERM',
'DBUS_SESSION_BUS_ADDRESS',
'DESKTOP_SESSION',
'DESKTOP_STARTUP_ID',
'DISPLAY',
'GNOME_KEYRING_PID',
'GNOME_KEYRING_SOCKET',
'GPG_AGENT_INFO',
'GTK_RC_FILES',
'SESSION_MANAGER',
'KRB5CCNAME',
'SSH_AUTH_SOCK',
'XAUTHORITY',
'XDG_DATA_DIRS',
'XDG_SESSION_COOKIE',
]
def preserved_envvars():
"""Variables which are taken from the environment and placed in the metadata"""
v = [
'BBPATH',
'BB_PRESERVE_ENV',
'BB_ENV_WHITELIST',
'BB_ENV_EXTRAWHITE',
'LANG',
'_',
]
return v + preserved_envvars_exported() + preserved_envvars_exported_interactive()
def filter_environment(good_vars):
"""
Create a pristine environment for bitbake. This will remove variables that
are not known and may influence the build in a negative way.
"""
removed_vars = []
for key in os.environ.keys():
if key in good_vars:
continue
removed_vars.append(key)
os.unsetenv(key)
del os.environ[key]
if len(removed_vars):
logger.debug(1, "Removed the following variables from the environment: %s", ", ".join(removed_vars))
return removed_vars
def create_interactive_env(d):
for k in preserved_envvars_exported_interactive():
os.setenv(k, d.getVar(k, True))
def approved_variables():
"""
Determine and return the list of whitelisted variables which are approved
to remain in the envrionment.
"""
approved = []
if 'BB_ENV_WHITELIST' in os.environ:
approved = os.environ['BB_ENV_WHITELIST'].split()
else:
approved = preserved_envvars()
if 'BB_ENV_EXTRAWHITE' in os.environ:
approved.extend(os.environ['BB_ENV_EXTRAWHITE'].split())
return approved
def clean_environment():
"""
Clean up any spurious environment variables. This will remove any
variables the user hasn't chosen to preserve.
"""
if 'BB_PRESERVE_ENV' not in os.environ:
good_vars = approved_variables()
filter_environment(good_vars)
def empty_environment():
"""
Remove all variables from the environment.
"""
for s in os.environ.keys():
os.unsetenv(s)
del os.environ[s]
def build_environment(d):
"""
Build an environment from all exported variables.
"""
import bb.data
for var in bb.data.keys(d):
export = d.getVarFlag(var, "export")
if export:
os.environ[var] = d.getVar(var, True) or ""
def remove(path, recurse=False):
"""Equivalent to rm -f or rm -rf"""
if not path:
return
import os, errno, shutil, glob
for name in glob.glob(path):
try:
os.unlink(name)
except OSError as exc:
if recurse and exc.errno == errno.EISDIR:
shutil.rmtree(name)
elif exc.errno != errno.ENOENT:
raise
def prunedir(topdir):
# Delete everything reachable from the directory named in 'topdir'.
# CAUTION: This is dangerous!
for root, dirs, files in os.walk(topdir, topdown = False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
if os.path.islink(os.path.join(root, name)):
os.remove(os.path.join(root, name))
else:
os.rmdir(os.path.join(root, name))
os.rmdir(topdir)
#
# Could also use return re.compile("(%s)" % "|".join(map(re.escape, suffixes))).sub(lambda mo: "", var)
# but thats possibly insane and suffixes is probably going to be small
#
def prune_suffix(var, suffixes, d):
# See if var ends with any of the suffixes listed and
# remove it if found
for suffix in suffixes:
if var.endswith(suffix):
return var.replace(suffix, "")
return var
def mkdirhier(directory):
"""Create a directory like 'mkdir -p', but does not complain if
directory already exists like os.makedirs
"""
try:
os.makedirs(directory)
except OSError as e:
if e.errno != errno.EEXIST:
raise e
def movefile(src, dest, newmtime = None, sstat = None):
"""Moves a file from src to dest, preserving all permissions and
attributes; mtime will be preserved even when moving across
filesystems. Returns true on success and false on failure. Move is
atomic.
"""
#print "movefile(" + src + "," + dest + "," + str(newmtime) + "," + str(sstat) + ")"
try:
if not sstat:
sstat = os.lstat(src)
except Exception as e:
print("movefile: Stating source file failed...", e)
return None
destexists = 1
try:
dstat = os.lstat(dest)
except:
dstat = os.lstat(os.path.dirname(dest))
destexists = 0
if destexists:
if stat.S_ISLNK(dstat[stat.ST_MODE]):
try:
os.unlink(dest)
destexists = 0
except Exception as e:
pass
if stat.S_ISLNK(sstat[stat.ST_MODE]):
try:
target = os.readlink(src)
if destexists and not stat.S_ISDIR(dstat[stat.ST_MODE]):
os.unlink(dest)
os.symlink(target, dest)
#os.lchown(dest,sstat[stat.ST_UID],sstat[stat.ST_GID])
os.unlink(src)
return os.lstat(dest)
except Exception as e:
print("movefile: failed to properly create symlink:", dest, "->", target, e)
return None
renamefailed = 1
if sstat[stat.ST_DEV] == dstat[stat.ST_DEV]:
try:
os.rename(src, dest)
renamefailed = 0
except Exception as e:
if e[0] != errno.EXDEV:
# Some random error.
print("movefile: Failed to move", src, "to", dest, e)
return None
# Invalid cross-device-link 'bind' mounted or actually Cross-Device
if renamefailed:
didcopy = 0
if stat.S_ISREG(sstat[stat.ST_MODE]):
try: # For safety copy then move it over.
shutil.copyfile(src, dest + "#new")
os.rename(dest + "#new", dest)
didcopy = 1
except Exception as e:
print('movefile: copy', src, '->', dest, 'failed.', e)
return None
else:
#we don't yet handle special, so we need to fall back to /bin/mv
a = getstatusoutput("/bin/mv -f " + "'" + src + "' '" + dest + "'")
if a[0] != 0:
print("movefile: Failed to move special file:" + src + "' to '" + dest + "'", a)
return None # failure
try:
if didcopy:
os.lchown(dest, sstat[stat.ST_UID], sstat[stat.ST_GID])
os.chmod(dest, stat.S_IMODE(sstat[stat.ST_MODE])) # Sticky is reset on chown
os.unlink(src)
except Exception as e:
print("movefile: Failed to chown/chmod/unlink", dest, e)
return None
if newmtime:
os.utime(dest, (newmtime, newmtime))
else:
os.utime(dest, (sstat[stat.ST_ATIME], sstat[stat.ST_MTIME]))
newmtime = sstat[stat.ST_MTIME]
return newmtime
def copyfile(src, dest, newmtime = None, sstat = None):
"""
Copies a file from src to dest, preserving all permissions and
attributes; mtime will be preserved even when moving across
filesystems. Returns true on success and false on failure.
"""
#print "copyfile(" + src + "," + dest + "," + str(newmtime) + "," + str(sstat) + ")"
try:
if not sstat:
sstat = os.lstat(src)
except Exception as e:
print("copyfile: Stating source file failed...", e)
return False
destexists = 1
try:
dstat = os.lstat(dest)
except:
dstat = os.lstat(os.path.dirname(dest))
destexists = 0
if destexists:
if stat.S_ISLNK(dstat[stat.ST_MODE]):
try:
os.unlink(dest)
destexists = 0
except Exception as e:
pass
if stat.S_ISLNK(sstat[stat.ST_MODE]):
try:
target = os.readlink(src)
if destexists and not stat.S_ISDIR(dstat[stat.ST_MODE]):
os.unlink(dest)
os.symlink(target, dest)
#os.lchown(dest,sstat[stat.ST_UID],sstat[stat.ST_GID])
return os.lstat(dest)
except Exception as e:
print("copyfile: failed to properly create symlink:", dest, "->", target, e)
return False
if stat.S_ISREG(sstat[stat.ST_MODE]):
try:
srcchown = False
if not os.access(src, os.R_OK):
# Make sure we can read it
srcchown = True
os.chmod(src, sstat[stat.ST_MODE] | stat.S_IRUSR)
# For safety copy then move it over.
shutil.copyfile(src, dest + "#new")
os.rename(dest + "#new", dest)
except Exception as e:
print('copyfile: copy', src, '->', dest, 'failed.', e)
return False
finally:
if srcchown:
os.chmod(src, sstat[stat.ST_MODE])
os.utime(src, (sstat[stat.ST_ATIME], sstat[stat.ST_MTIME]))
else:
#we don't yet handle special, so we need to fall back to /bin/mv
a = getstatusoutput("/bin/cp -f " + "'" + src + "' '" + dest + "'")
if a[0] != 0:
print("copyfile: Failed to copy special file:" + src + "' to '" + dest + "'", a)
return False # failure
try:
os.lchown(dest, sstat[stat.ST_UID], sstat[stat.ST_GID])
os.chmod(dest, stat.S_IMODE(sstat[stat.ST_MODE])) # Sticky is reset on chown
except Exception as e:
print("copyfile: Failed to chown/chmod/unlink", dest, e)
return False
if newmtime:
os.utime(dest, (newmtime, newmtime))
else:
os.utime(dest, (sstat[stat.ST_ATIME], sstat[stat.ST_MTIME]))
newmtime = sstat[stat.ST_MTIME]
return newmtime
def which(path, item, direction = 0):
"""
Locate a file in a PATH
"""
paths = (path or "").split(':')
if direction != 0:
paths.reverse()
for p in paths:
next = os.path.join(p, item)
if os.path.exists(next):
return next
return ""
def to_boolean(string, default=None):
if not string:
return default
normalized = string.lower()
if normalized in ("y", "yes", "1", "true"):
return True
elif normalized in ("n", "no", "0", "false"):
return False
else:
raise ValueError("Invalid value for to_boolean: %s" % string)
def contains(variable, checkvalues, truevalue, falsevalue, d):
val = d.getVar(variable, True)
if not val:
return falsevalue
val = set(val.split())
if isinstance(checkvalues, basestring):
checkvalues = set(checkvalues.split())
else:
checkvalues = set(checkvalues)
if checkvalues.issubset(val):
return truevalue
return falsevalue
def cpu_count():
return multiprocessing.cpu_count()
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