# vi:filetype=python:expandtab:tabstop=4:shiftwidth=4 # # file scons_utils.py # # This file is part of LyX, the document processor. # Licence details can be found in the file COPYING. # # \author Bo Peng # Full author contact details are available in file CREDITS. # # This file defines all the utility functions for the # scons-based build system of lyx # import os, sys, re, shutil, glob from SCons.Util import * def getVerFromConfigure(path): " get lyx version from the AC_INIT line of configure.ac " try: config = open(os.path.join(path, 'configure.ac')) except: print "Can not open configure.ac. " return 'x.x.x' # find a line like follows # AC_INIT(LyX,1.4.4svn,[lyx-devel@lists.lyx.org],[lyx]) pat = re.compile('AC_INIT\([^,]+,([^,]+),') for line in config.readlines(): if pat.match(line): (version,) = pat.match(line).groups() return version.strip() return 'x.x.x' def writeToFile(filename, lines, append = False): " utility function: write or append lines to filename " # create directory if needed dir = os.path.split(filename)[0] if dir != '' and not os.path.isdir(dir): os.makedirs(dir) if append: file = open(filename, 'a') else: file = open(filename, 'w') file.write(lines) file.close() def env_subst(target, source, env): ''' subst variables in source by those in env, and output to target source and target are scons File() objects %key% (not key itself) is an indication of substitution ''' assert len(target) == 1 assert len(source) == 1 target_file = file(str(target[0]), "w") source_file = file(str(source[0]), "r") contents = source_file.read() for k, v in env.items(): try: val = env.subst('$'+k) # temporary fix for the \Resource backslash problem val = val.replace('\\', '/') # multi-line replacement val = val.replace('\n',r'\\n\\\n') contents = re.sub('@'+k+'@', val, contents) except: pass target_file.write(contents + "\n") target_file.close() #st = os.stat(str(source[0])) #os.chmod(str(target[0]), stat.S_IMODE(st[stat.ST_MODE]) | stat.S_IWRITE) def env_nsis(source, target, env, for_signature): ''' Get nsis command line ''' def quoteIfSpaced(str): if ' ' in str: return '"' + str + '"' else: return str ret = env['NSIS'] + " /V1 " if env.has_key('NSISFLAGS'): for flag in env['NSISFLAGS']: ret += flag ret += ' ' if env.has_key('NSISDEFINES'): for d in env['NSISDEFINES']: ret += '/D'+d if env['NSISDEFINES'][d]: ret += '=' + quoteIfSpaced(env['NSISDEFINES'][d]) ret += ' ' # bundled? if '-bundle.exe' in str(target[0]): ret += '/DSETUPTYPE_BUNDLE=1 ' for s in source: ret += quoteIfSpaced(str(s)) return ret def env_toc(target, source, env): '''Generate target from source files''' # this is very tricky because we need to use installed lyx2lyx with # correct lyx2lyx_version.py sys.path.append(env['LYX2LYX_DEST']) sys.path.append(env.Dir('$TOP_SRCDIR/lib/doc').abspath) import doc_toc # build toc doc_toc.build_toc(str(target[0]), [file.abspath for file in source]) def relativePath(env, path): '''return relative path from top source dir''' # full pathname of path path1 = os.path.normpath(env.File(path).abspath).split(os.sep) path2 = os.path.normpath(env.Dir('$TOP_SRCDIR').abspath).split(os.sep) if path1[:len(path2)] != path2: print "Path %s is not under top source directory" % path return os.path.join(*path1[len(path2):]) def env_language_l10n(target, source, env): '''Generate pot file from lib/language''' input = open(env.File(source[0]).abspath) output = open(env.File(target[0]).abspath, 'w') for lineno, line in enumerate(input.readlines()): if line[0] == '#': continue items = line.split('"') # empty lines? if len(items) != 5: print 'Warning: this line looks strange:' print line # From: # afrikaans afrikaans "Afrikaans" false iso8859-15 af_ZA "" # To: # #: lib/languages:2 # msgid "Afrikaans" # msgstr "" print >> output, '#: %s:%d\nmsgid "%s"\nmsgstr ""\n' % (relativePath(env, source[0]), lineno+1, items[1]) input.close() output.close() def createResFromIcon(env, icon_file, rc_file): ''' create a rc file with icon, and return res file (windows only) ''' if os.name == 'nt': rc_name = env.File(rc_file).abspath dir = os.path.split(rc_name)[0] if not os.path.isdir(dir): os.makedirs(dir) rc = open(rc_name, 'w') print >> rc, 'IDI_ICON1 ICON DISCARDABLE "%s"' % \ os.path.join(env.Dir('$TOP_SRCDIR').abspath, 'development', 'win32', 'packaging', 'icons', icon_file).replace('\\', '\\\\') rc.close() return env.RES(rc_name) else: return [] # # autoconf tests # def checkPkgConfig(conf, version): ''' Return false if pkg_config does not exist, or is too old ''' conf.Message('Checking for pkg-config...') ret = conf.TryAction('pkg-config --atleast-pkgconfig-version=%s' % version)[0] conf.Result(ret) return ret def checkPackage(conf, pkg): ''' check if pkg is under the control of conf ''' conf.Message('Checking for package %s...' % pkg) ret = conf.TryAction("pkg-config --print-errors --exists %s" % pkg)[0] conf.Result(ret) return ret def checkMkdirOneArg(conf): check_mkdir_one_arg_source = """ #include int main() { mkdir("somedir"); } """ conf.Message('Checking for the number of args for mkdir... ') ret = conf.TryLink(check_mkdir_one_arg_source, '.c') or \ conf.TryLink('#include ' + check_mkdir_one_arg_source, '.c') or \ conf.TryLink('#include ' + check_mkdir_one_arg_source, '.c') if ret: conf.Result('one') else: conf.Result('two') return ret def checkCXXGlobalCstd(conf): ''' Checking the use of std::tolower or tolower ''' check_global_cstd_source = ''' #include using std::tolower; int main() { return 0; } ''' conf.Message('Checking for the use of global cstd... ') ret = conf.TryLink(check_global_cstd_source, '.c') conf.Result(ret) return ret def checkSelectArgType(conf): ''' Adapted from autoconf ''' conf.Message('Checking for arg types for select... ') for arg234 in ['fd_set *', 'int *', 'void *']: for arg1 in ['int', 'size_t', 'unsigned long', 'unsigned']: for arg5 in ['struct timeval *', 'const struct timeval *']: check_select_source = ''' #if HAVE_SYS_SELECT_H # include #endif #if HAVE_SYS_SOCKET_H # include #endif extern int select (%s, %s, %s, %s, %s); int main() { return(0); } ''' % (arg1, arg234, arg234, arg234, arg5) ret = conf.TryLink(check_select_source, '.c') if ret: conf.Result(ret) return (arg1, arg234, arg5) conf.Result('no (use default)') return ('int', 'int *', 'struct timeval *') def checkBoostLibraries(conf, libs, lib_paths, inc_paths, versions, isDebug): ''' look for boost libraries libs: library names lib_paths: try these paths for boost libraries inc_paths: try these paths for boost headers versions: supported boost versions isDebug: if true, use debug libraries ''' conf.Message('Checking for boost library %s... ' % ', '.join(libs)) libprefix = conf.env['LIBPREFIX'] libsuffix = '(%s|%s)' % (conf.env['LIBSUFFIX'], conf.env['SHLIBSUFFIX']) found_lib = False found_inc = False lib_names = [] lib_path = None inc_path = None for path in lib_paths: conf.Log("Looking into %s\n" % path) for lib in libs: # get all the libs, then filter for the right library files = glob.glob(os.path.join(path, '%sboost_%s-*.*' % (libprefix, lib))) # check things like libboost_iostreams-gcc-mt-d-1_33_1.a if len(files) > 0: conf.Log("Find boost libraries: %s\n" % files) # runtime code includes s,g,y,d,p,n, where we should look for # d,g,y for debug, s,p,n for release lib_files = [] if isDebug: for ver in versions: lib_files += filter(lambda x: re.search('%sboost_%s-\w+-mt-[^spn]+-%s%s' % (libprefix, lib, ver, libsuffix), x), files) else: for ver in versions: lib_files += filter(lambda x: re.search('%sboost_%s-\w+-mt-([^dgy]+-)*%s%s' % (libprefix, lib, ver, libsuffix), x), files) if len(lib_files) == 0: # use alternative libraries for ver in versions: lib_files += filter(lambda x: re.search('%sboost_%s-[\w-]+%s%s' % (libprefix, lib, ver, libsuffix), x), files) if len(lib_files) > 0: # get xxx-gcc-1_33_1 from /usr/local/lib/libboost_xxx-gcc-1_33_1.a name = lib_files[0].split(os.sep)[-1][len(libprefix):] lib_names.append(name.split('.')[0]) conf.Log("Qualified libraries: %s\n" % lib_names) else: conf.Log("No qualified library is found.\n") break if len(lib_names) == len(libs): found_lib = True lib_path = path break if not found_lib: if len(lib_names) == 0: conf.Log("No boost library is found\n") else: conf.Log("Found boost libraries: %s\n" % lib_names) conf.Result('no') return (None, None, None) # check version number in boost/version.hpp def isValidBoostDir(dir): version_file = os.path.join(dir, 'boost', 'version.hpp') if not os.path.isfile(version_file): return False version_file_content = open(version_file).read() version_strings = ['#define BOOST_LIB_VERSION "%s"' % ver for ver in versions] return True in [x in version_file_content for x in version_strings] # check for boost header file for path in inc_paths: conf.Log("Checking for inc path: %s\n" % path) if isValidBoostDir(path): inc_path = path found_inc = True else: # check path/boost_1_xx_x/boost dirs = glob.glob(os.path.join(path, 'boost-*')) if len(dirs) > 0 and isValidBoostDir(dirs[0]): conf.Log("Checing for sub directory: %s\n" % dirs[0]) inc_path = dirs[0] found_inc = True # return result if found_inc: conf.Result('yes') conf.Log('Using boost libraries %s\n' % (', '.join(lib_names))) return (lib_names, lib_path, inc_path) else: conf.Result('no') return (None, None, None) def checkCommand(conf, cmd): ''' check the existence of a command return full path to the command, or none ''' conf.Message('Checking for command %s...' % cmd) res = WhereIs(cmd) conf.Result(res is not None) return res def checkNSIS(conf): ''' check the existence of nsis compiler, return the fullpath ''' conf.Message('Checking for nsis compiler...') res = None if can_read_reg: # If we can read the registry, get the NSIS command from it try: k = RegOpenKeyEx(hkey_mod.HKEY_LOCAL_MACHINE, 'SOFTWARE\\NSIS') val, tok = RegQueryValueEx(k,None) ret = val + os.path.sep + 'makensis.exe' if os.path.isfile(ret): res = '"' + ret + '"' else: res = None except: pass # Couldn't find the key, just act like we can't read the registry # Hope it's on the path if res is None: res = WhereIs('makensis.exe') conf.Result(res is not None) return res def checkLC_MESSAGES(conf): ''' check the definition of LC_MESSAGES ''' check_LC_MESSAGES = ''' #include int main() { return LC_MESSAGES; } ''' conf.Message('Checking for LC_MESSAGES in locale.h... ') ret = conf.TryLink(check_LC_MESSAGES, '.c') conf.Result(ret) return ret def checkIconvConst(conf): ''' check the declaration of iconv ''' check_iconv_const = ''' #include // this declaration will fail when there already exists a non const char** // version which returns size_t double iconv(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft); int main() { return 0; } ''' conf.Message('Checking if the declaration of iconv needs const... ') ret = conf.TryLink(check_iconv_const, '.c') conf.Result(ret) return ret def checkSizeOfWChar(conf): ''' check the size of wchar ''' check_sizeof_wchar = ''' int i[ ( sizeof(wchar_t)==%d ? 1 : -1 ) ]; int main() { return 0; } ''' conf.Message('Checking the size of wchar_t... ') if conf.TryLink(check_sizeof_wchar % 2, '.cpp'): ret = 2 elif conf.TryLink(check_sizeof_wchar % 4, '.cpp'): ret = 4 else: ret = 0 conf.Result(str(ret)) return ret def createConfigFile(conf, config_file, config_pre = '', config_post = '', headers = [], functions = [], types = [], libs = [], custom_tests = [], extra_items = []): ''' create a configuration file, with options config_file: which file to create config_pre: first part of the config file config_post: last part of the config file headers: header files to check, in the form of a list of ('file', 'HAVE_FILE', 'c'/'c++') functions: functions to check, in the form of a list of ('func', 'HAVE_func', 'include lines'/None) types: types to check, in the form of a list of ('type', 'HAVE_TYPE', 'includelines'/None) libs: libraries to check, in the form of a list of ('lib', 'HAVE_LIB', 'LIB_NAME'). HAVE_LIB will be set if 'lib' exists, or any of the libs exists if 'lib' is a list of libs. Optionally, user can provide another key LIB_NAME, that will be set to the detected lib (or None otherwise). custom_tests: extra tests to perform, in the form of a list of (test (True/False), 'key', 'desc', 'true config line', 'false config line') If the last two are ignored, '#define key 1' '/*#undef key */' will be used. extra_items: extra configuration lines, in the form of a list of ('config', 'description') Return: The result of each test, as a dictioanry of res['XXX'] = True/False XXX are keys defined in each argument. ''' cont = config_pre + '\n' result = {} # add to this string, in appropriate format def configString(lines, desc=''): text = '' if lines.strip() != '': if desc != '': text += '/* ' + desc + ' */\n' text += lines + '\n\n' return text # # headers for header in headers: description = "Define to 1 if you have the <%s> header file." % header[0] if (header[2] == 'c' and conf.CheckCHeader(header[0])) or \ (header[2] == 'cxx' and conf.CheckCXXHeader(header[0])): result[header[1]] = 1 cont += configString('#define %s 1' % header[1], desc = description) else: result[header[1]] = 0 cont += configString('/* #undef %s */' % header[1], desc = description) # functions for func in functions: description = "Define to 1 if you have the `%s' function." % func[0] if conf.CheckFunc(func[0], header=func[2]): result[func[1]] = 1 cont += configString('#define %s 1' % func[1], desc = description) else: result[func[1]] = 0 cont += configString('/* #undef %s */' % func[1], desc = description) # types for t in types: description = "Define to 1 if you have the `%s' type." % t[0] if conf.CheckType(t[0], includes=t[2]): result[t[1]] = 1 cont += configString('#define %s 1' % t[1], desc = description) else: result[t[1]] = 0 cont += configString('/* #undef %s */' % t[1], desc = description) # libraries for lib in libs: description = "Define to 1 if you have the `%s' library (-l%s)." % (lib[0], lib[0]) if type(lib[0]) is type(''): lib_list = [lib[0]] else: lib_list = lib[0] # check if any of the lib exists result[lib[1]] = 0 # if user want the name of the lib detected if len(lib) == 3: result[lib[2]] = None for ll in lib_list: if conf.CheckLib(ll): result[lib[1]] = 1 if len(lib) == 3: result[lib[2]] = ll cont += configString('#define %s 1' % lib[1], desc = description) break # if not found if not result[lib[1]]: cont += configString('/* #undef %s */' % lib[1], desc = description) # custom tests for test in custom_tests: if test[0]: result[test[1]] = 1 if len(test) == 3: cont += configString('#define %s 1' % test[1], desc = test[2]) else: cont += configString(test[3], desc = test[2]) else: result[test[1]] = 0 if len(test) == 3: cont += configString('/* #undef %s */' % test[1], desc = test[2]) else: cont += configString(test[4], desc = test[2]) # extra items (no key is returned) for item in extra_items: cont += configString(item[0], desc = item[1]) # add the last part cont += '\n' + config_post + '\n' # write to file writeToFile(config_file, cont) return result def installCygwinLDScript(path): ''' Install i386pe.x-no-rdata ''' ld_script = os.path.join(path, 'i386pe.x-no-rdata') script = open(ld_script, 'w') script.write('''/* specific linker script avoiding .rdata sections, for normal executables for a reference see http://www.cygwin.com/ml/cygwin/2004-09/msg01101.html http://www.cygwin.com/ml/cygwin-apps/2004-09/msg00309.html */ OUTPUT_FORMAT(pei-i386) SEARCH_DIR("/usr/i686-pc-cygwin/lib"); SEARCH_DIR("/usr/lib"); SEARCH_DIR("/usr/lib/w32api"); ENTRY(_mainCRTStartup) SECTIONS { .text __image_base__ + __section_alignment__ : { *(.init) *(.text) *(SORT(.text$*)) *(.glue_7t) *(.glue_7) ___CTOR_LIST__ = .; __CTOR_LIST__ = . ; LONG (-1);*(.ctors); *(.ctor); *(SORT(.ctors.*)); LONG (0); ___DTOR_LIST__ = .; __DTOR_LIST__ = . ; LONG (-1); *(.dtors); *(.dtor); *(SORT(.dtors.*)); LONG (0); *(.fini) /* ??? Why is .gcc_exc here? */ *(.gcc_exc) PROVIDE (etext = .); *(.gcc_except_table) } /* The Cygwin32 library uses a section to avoid copying certain data on fork. This used to be named ".data". The linker used to include this between __data_start__ and __data_end__, but that breaks building the cygwin32 dll. Instead, we name the section ".data_cygwin_nocopy" and explictly include it after __data_end__. */ .data BLOCK(__section_alignment__) : { __data_start__ = . ; *(.data) *(.data2) *(SORT(.data$*)) *(.rdata) *(SORT(.rdata$*)) *(.eh_frame) ___RUNTIME_PSEUDO_RELOC_LIST__ = .; __RUNTIME_PSEUDO_RELOC_LIST__ = .; *(.rdata_runtime_pseudo_reloc) ___RUNTIME_PSEUDO_RELOC_LIST_END__ = .; __RUNTIME_PSEUDO_RELOC_LIST_END__ = .; __data_end__ = . ; *(.data_cygwin_nocopy) } .rdata BLOCK(__section_alignment__) : { } .pdata BLOCK(__section_alignment__) : { *(.pdata) } .bss BLOCK(__section_alignment__) : { __bss_start__ = . ; *(.bss) *(COMMON) __bss_end__ = . ; } .edata BLOCK(__section_alignment__) : { *(.edata) } /DISCARD/ : { *(.debug$S) *(.debug$T) *(.debug$F) *(.drectve) } .idata BLOCK(__section_alignment__) : { /* This cannot currently be handled with grouped sections. See pe.em:sort_sections. */ SORT(*)(.idata$2) SORT(*)(.idata$3) /* These zeroes mark the end of the import list. */ LONG (0); LONG (0); LONG (0); LONG (0); LONG (0); SORT(*)(.idata$4) SORT(*)(.idata$5) SORT(*)(.idata$6) SORT(*)(.idata$7) } .CRT BLOCK(__section_alignment__) : { ___crt_xc_start__ = . ; *(SORT(.CRT$XC*)) /* C initialization */ ___crt_xc_end__ = . ; ___crt_xi_start__ = . ; *(SORT(.CRT$XI*)) /* C++ initialization */ ___crt_xi_end__ = . ; ___crt_xl_start__ = . ; *(SORT(.CRT$XL*)) /* TLS callbacks */ /* ___crt_xl_end__ is defined in the TLS Directory support code */ ___crt_xp_start__ = . ; *(SORT(.CRT$XP*)) /* Pre-termination */ ___crt_xp_end__ = . ; ___crt_xt_start__ = . ; *(SORT(.CRT$XT*)) /* Termination */ ___crt_xt_end__ = . ; } .tls BLOCK(__section_alignment__) : { ___tls_start__ = . ; *(.tls) *(.tls$) *(SORT(.tls$*)) ___tls_end__ = . ; } .endjunk BLOCK(__section_alignment__) : { /* end is deprecated, don't use it */ PROVIDE (end = .); PROVIDE ( _end = .); __end__ = .; } .rsrc BLOCK(__section_alignment__) : { *(.rsrc) *(SORT(.rsrc$*)) } .reloc BLOCK(__section_alignment__) : { *(.reloc) } .stab BLOCK(__section_alignment__) (NOLOAD) : { *(.stab) } .stabstr BLOCK(__section_alignment__) (NOLOAD) : { *(.stabstr) } /* DWARF debug sections. Symbols in the DWARF debugging sections are relative to the beginning of the section. Unlike other targets that fake this by putting the section VMA at 0, the PE format will not allow it. */ /* DWARF 1.1 and DWARF 2. */ .debug_aranges BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_aranges) } .debug_pubnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_pubnames) } /* DWARF 2. */ .debug_info BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_info) *(.gnu.linkonce.wi.*) } .debug_abbrev BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_abbrev) } .debug_line BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_line) } .debug_frame BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_frame) } .debug_str BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_str) } .debug_loc BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_loc) } .debug_macinfo BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_macinfo) } /* SGI/MIPS DWARF 2 extensions. */ .debug_weaknames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_weaknames) } .debug_funcnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_funcnames) } .debug_typenames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_typenames) } .debug_varnames BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_varnames) } /* DWARF 3. */ .debug_ranges BLOCK(__section_alignment__) (NOLOAD) : { *(.debug_ranges) } } ''') script.close() return(ld_script) def installCygwinPostinstallScript(path): ''' Install lyx.sh ''' postinstall_script = os.path.join(path, 'lyx.sh') script = open(postinstall_script, 'w') script.write(r'''#!/bin/sh # Add /usr/share/lyx/fonts to /etc/fonts/local.conf # if it is not already there. if [ -f /etc/fonts/local.conf ]; then grep -q /usr/share/lyx/fonts /etc/fonts/local.conf if [ $? -ne 0 ]; then sed 's/^<\/fontconfig>/\/usr\/share\/lyx\/fonts<\/dir>\n<\/fontconfig>/' /etc/fonts/local.conf > /etc/fonts/local.conf.tmp mv -f /etc/fonts/local.conf.tmp /etc/fonts/local.conf fc-cache /usr/share/lyx/fonts fi fi ''') script.close() return(postinstall_script) try: # these will be used under win32 import win32file import win32event import win32process import win32security except: # does not matter if it fails on other systems pass class loggedSpawn: def __init__(self, env, logfile, longarg, info): # save the spawn system self.env = env self.logfile = logfile # clear the logfile (it may not exist) if logfile != '': # this will overwrite existing content. writeToFile(logfile, info, append=False) # self.longarg = longarg # get hold of the old spawn? (necessary?) self._spawn = env['SPAWN'] # define new SPAWN def spawn(self, sh, escape, cmd, args, spawnenv): # get command line newargs = ' '.join(map(escape, args[1:])) cmdline = cmd + " " + newargs # # if log is not empty, write to it if self.logfile != '': # this tend to be slow (?) but ensure correct output # Note that cmdline may be long so I do not escape it try: # since this is not an essential operation, proceed if things go wrong here. writeToFile(self.logfile, cmd + " " + ' '.join(args[1:]) + '\n', append=True) except: print "Warning: can not write to log file ", self.logfile # # if the command is not too long, use the old if not self.longarg or len(cmdline) < 8000: exit_code = self._spawn(sh, escape, cmd, args, spawnenv) else: sAttrs = win32security.SECURITY_ATTRIBUTES() StartupInfo = win32process.STARTUPINFO() for var in spawnenv: spawnenv[var] = spawnenv[var].encode('ascii', 'replace') # check for any special operating system commands if cmd == 'del': for arg in args[1:]: win32file.DeleteFile(arg) exit_code = 0 else: # otherwise execute the command. hProcess, hThread, dwPid, dwTid = win32process.CreateProcess(None, cmdline, None, None, 1, 0, spawnenv, None, StartupInfo) win32event.WaitForSingleObject(hProcess, win32event.INFINITE) exit_code = win32process.GetExitCodeProcess(hProcess) win32file.CloseHandle(hProcess); win32file.CloseHandle(hThread); return exit_code def setLoggedSpawn(env, logfile = '', longarg=False, info=''): ''' This function modify env and allow logging of commands to a logfile. If the argument is too long a win32 spawn will be used instead of the system one ''' # # create a new spwn object ls = loggedSpawn(env, logfile, longarg, info) # replace the old SPAWN by the new function env['SPAWN'] = ls.spawn