| """distutils.util |
| |
| Miscellaneous utility functions -- anything that doesn't fit into |
| one of the other *util.py modules. |
| """ |
| |
| # created 1999/03/08, Greg Ward |
| |
| __revision__ = "$Id$" |
| |
| import sys, os, string, re |
| from distutils.errors import DistutilsPlatformError |
| from distutils.dep_util import newer |
| from distutils.spawn import spawn |
| |
| |
| def get_platform (): |
| """Return a string that identifies the current platform. This is used |
| mainly to distinguish platform-specific build directories and |
| platform-specific built distributions. Typically includes the OS name |
| and version and the architecture (as supplied by 'os.uname()'), |
| although the exact information included depends on the OS; eg. for IRIX |
| the architecture isn't particularly important (IRIX only runs on SGI |
| hardware), but for Linux the kernel version isn't particularly |
| important. |
| |
| Examples of returned values: |
| linux-i586 |
| linux-alpha (?) |
| solaris-2.6-sun4u |
| irix-5.3 |
| irix64-6.2 |
| |
| For non-POSIX platforms, currently just returns 'sys.platform'. |
| """ |
| if os.name != "posix" or not hasattr(os, 'uname'): |
| # XXX what about the architecture? NT is Intel or Alpha, |
| # Mac OS is M68k or PPC, etc. |
| return sys.platform |
| |
| # Try to distinguish various flavours of Unix |
| |
| (osname, host, release, version, machine) = os.uname() |
| osname = string.lower(osname) |
| if osname[:5] == "linux": |
| # At least on Linux/Intel, 'machine' is the processor -- |
| # i386, etc. |
| # XXX what about Alpha, SPARC, etc? |
| return "%s-%s" % (osname, machine) |
| elif osname[:5] == "sunos": |
| if release[0] >= "5": # SunOS 5 == Solaris 2 |
| osname = "solaris" |
| release = "%d.%s" % (int(release[0]) - 3, release[2:]) |
| # fall through to standard osname-release-machine representation |
| elif osname[:4] == "irix": # could be "irix64"! |
| return "%s-%s" % (osname, release) |
| elif osname[:6] == "cygwin": |
| rel_re = re.compile (r'[\d.]+') |
| m = rel_re.match(release) |
| if m: |
| release = m.group() |
| |
| return "%s-%s-%s" % (osname, release, machine) |
| |
| # get_platform () |
| |
| |
| def convert_path (pathname): |
| """Return 'pathname' as a name that will work on the native filesystem, |
| i.e. split it on '/' and put it back together again using the current |
| directory separator. Needed because filenames in the setup script are |
| always supplied in Unix style, and have to be converted to the local |
| convention before we can actually use them in the filesystem. Raises |
| ValueError on non-Unix-ish systems if 'pathname' either starts or |
| ends with a slash. |
| """ |
| if os.sep == '/': |
| return pathname |
| if pathname[0] == '/': |
| raise ValueError, "path '%s' cannot be absolute" % pathname |
| if pathname[-1] == '/': |
| raise ValueError, "path '%s' cannot end with '/'" % pathname |
| |
| paths = string.split(pathname, '/') |
| return apply(os.path.join, paths) |
| |
| # convert_path () |
| |
| |
| def change_root (new_root, pathname): |
| """Return 'pathname' with 'new_root' prepended. If 'pathname' is |
| relative, this is equivalent to "os.path.join(new_root,pathname)". |
| Otherwise, it requires making 'pathname' relative and then joining the |
| two, which is tricky on DOS/Windows and Mac OS. |
| """ |
| if os.name == 'posix': |
| if not os.path.isabs(pathname): |
| return os.path.join(new_root, pathname) |
| else: |
| return os.path.join(new_root, pathname[1:]) |
| |
| elif os.name == 'nt': |
| (drive, path) = os.path.splitdrive(pathname) |
| if path[0] == '\\': |
| path = path[1:] |
| return os.path.join(new_root, path) |
| |
| elif os.name == 'mac': |
| if not os.path.isabs(pathname): |
| return os.path.join(new_root, pathname) |
| else: |
| # Chop off volume name from start of path |
| elements = string.split(pathname, ":", 1) |
| pathname = ":" + elements[1] |
| return os.path.join(new_root, pathname) |
| |
| else: |
| raise DistutilsPlatformError, \ |
| "nothing known about platform '%s'" % os.name |
| |
| |
| _environ_checked = 0 |
| def check_environ (): |
| """Ensure that 'os.environ' has all the environment variables we |
| guarantee that users can use in config files, command-line options, |
| etc. Currently this includes: |
| HOME - user's home directory (Unix only) |
| PLAT - description of the current platform, including hardware |
| and OS (see 'get_platform()') |
| """ |
| global _environ_checked |
| if _environ_checked: |
| return |
| |
| if os.name == 'posix' and not os.environ.has_key('HOME'): |
| import pwd |
| os.environ['HOME'] = pwd.getpwuid(os.getuid())[5] |
| |
| if not os.environ.has_key('PLAT'): |
| os.environ['PLAT'] = get_platform() |
| |
| _environ_checked = 1 |
| |
| |
| def subst_vars (str, local_vars): |
| """Perform shell/Perl-style variable substitution on 'string'. Every |
| occurrence of '$' followed by a name is considered a variable, and |
| variable is substituted by the value found in the 'local_vars' |
| dictionary, or in 'os.environ' if it's not in 'local_vars'. |
| 'os.environ' is first checked/augmented to guarantee that it contains |
| certain values: see 'check_environ()'. Raise ValueError for any |
| variables not found in either 'local_vars' or 'os.environ'. |
| """ |
| check_environ() |
| def _subst (match, local_vars=local_vars): |
| var_name = match.group(1) |
| if local_vars.has_key(var_name): |
| return str(local_vars[var_name]) |
| else: |
| return os.environ[var_name] |
| |
| try: |
| return re.sub(r'\$([a-zA-Z_][a-zA-Z_0-9]*)', _subst, str) |
| except KeyError, var: |
| raise ValueError, "invalid variable '$%s'" % var |
| |
| # subst_vars () |
| |
| |
| def grok_environment_error (exc, prefix="error: "): |
| """Generate a useful error message from an EnvironmentError (IOError or |
| OSError) exception object. Handles Python 1.5.1 and 1.5.2 styles, and |
| does what it can to deal with exception objects that don't have a |
| filename (which happens when the error is due to a two-file operation, |
| such as 'rename()' or 'link()'. Returns the error message as a string |
| prefixed with 'prefix'. |
| """ |
| # check for Python 1.5.2-style {IO,OS}Error exception objects |
| if hasattr(exc, 'filename') and hasattr(exc, 'strerror'): |
| if exc.filename: |
| error = prefix + "%s: %s" % (exc.filename, exc.strerror) |
| else: |
| # two-argument functions in posix module don't |
| # include the filename in the exception object! |
| error = prefix + "%s" % exc.strerror |
| else: |
| error = prefix + str(exc[-1]) |
| |
| return error |
| |
| |
| # Needed by 'split_quoted()' |
| _wordchars_re = re.compile(r'[^\\\'\"%s ]*' % string.whitespace) |
| _squote_re = re.compile(r"'(?:[^'\\]|\\.)*'") |
| _dquote_re = re.compile(r'"(?:[^"\\]|\\.)*"') |
| |
| def split_quoted (s): |
| """Split a string up according to Unix shell-like rules for quotes and |
| backslashes. In short: words are delimited by spaces, as long as those |
| spaces are not escaped by a backslash, or inside a quoted string. |
| Single and double quotes are equivalent, and the quote characters can |
| be backslash-escaped. The backslash is stripped from any two-character |
| escape sequence, leaving only the escaped character. The quote |
| characters are stripped from any quoted string. Returns a list of |
| words. |
| """ |
| |
| # This is a nice algorithm for splitting up a single string, since it |
| # doesn't require character-by-character examination. It was a little |
| # bit of a brain-bender to get it working right, though... |
| |
| s = string.strip(s) |
| words = [] |
| pos = 0 |
| |
| while s: |
| m = _wordchars_re.match(s, pos) |
| end = m.end() |
| if end == len(s): |
| words.append(s[:end]) |
| break |
| |
| if s[end] in string.whitespace: # unescaped, unquoted whitespace: now |
| words.append(s[:end]) # we definitely have a word delimiter |
| s = string.lstrip(s[end:]) |
| pos = 0 |
| |
| elif s[end] == '\\': # preserve whatever is being escaped; |
| # will become part of the current word |
| s = s[:end] + s[end+1:] |
| pos = end+1 |
| |
| else: |
| if s[end] == "'": # slurp singly-quoted string |
| m = _squote_re.match(s, end) |
| elif s[end] == '"': # slurp doubly-quoted string |
| m = _dquote_re.match(s, end) |
| else: |
| raise RuntimeError, \ |
| "this can't happen (bad char '%c')" % s[end] |
| |
| if m is None: |
| raise ValueError, \ |
| "bad string (mismatched %s quotes?)" % s[end] |
| |
| (beg, end) = m.span() |
| s = s[:beg] + s[beg+1:end-1] + s[end:] |
| pos = m.end() - 2 |
| |
| if pos >= len(s): |
| words.append(s) |
| break |
| |
| return words |
| |
| # split_quoted () |
| |
| |
| def execute (func, args, msg=None, verbose=0, dry_run=0): |
| """Perform some action that affects the outside world (eg. by writing |
| to the filesystem). Such actions are special because they are disabled |
| by the 'dry_run' flag, and announce themselves if 'verbose' is true. |
| This method takes care of all that bureaucracy for you; all you have to |
| do is supply the function to call and an argument tuple for it (to |
| embody the "external action" being performed), and an optional message |
| to print. |
| """ |
| # Generate a message if we weren't passed one |
| if msg is None: |
| msg = "%s%s" % (func.__name__, `args`) |
| if msg[-2:] == ',)': # correct for singleton tuple |
| msg = msg[0:-2] + ')' |
| |
| # Print it if verbosity level is high enough |
| if verbose: |
| print msg |
| |
| # And do it, as long as we're not in dry-run mode |
| if not dry_run: |
| apply(func, args) |
| |
| # execute() |
| |
| |
| def strtobool (val): |
| """Convert a string representation of truth to true (1) or false (0). |
| True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values |
| are 'n', 'no', 'f', 'false', 'off', and '0'. Raises ValueError if |
| 'val' is anything else. |
| """ |
| val = string.lower(val) |
| if val in ('y', 'yes', 't', 'true', 'on', '1'): |
| return 1 |
| elif val in ('n', 'no', 'f', 'false', 'off', '0'): |
| return 0 |
| else: |
| raise ValueError, "invalid truth value %s" % `val` |
| |
| |
| def byte_compile (py_files, |
| optimize=0, force=0, |
| prefix=None, base_dir=None, |
| verbose=1, dry_run=0, |
| direct=None): |
| """Byte-compile a collection of Python source files to either .pyc |
| or .pyo files in the same directory. 'py_files' is a list of files |
| to compile; any files that don't end in ".py" are silently skipped. |
| 'optimize' must be one of the following: |
| 0 - don't optimize (generate .pyc) |
| 1 - normal optimization (like "python -O") |
| 2 - extra optimization (like "python -OO") |
| If 'force' is true, all files are recompiled regardless of |
| timestamps. |
| |
| The source filename encoded in each bytecode file defaults to the |
| filenames listed in 'py_files'; you can modify these with 'prefix' and |
| 'basedir'. 'prefix' is a string that will be stripped off of each |
| source filename, and 'base_dir' is a directory name that will be |
| prepended (after 'prefix' is stripped). You can supply either or both |
| (or neither) of 'prefix' and 'base_dir', as you wish. |
| |
| If 'verbose' is true, prints out a report of each file. If 'dry_run' |
| is true, doesn't actually do anything that would affect the filesystem. |
| |
| Byte-compilation is either done directly in this interpreter process |
| with the standard py_compile module, or indirectly by writing a |
| temporary script and executing it. Normally, you should let |
| 'byte_compile()' figure out to use direct compilation or not (see |
| the source for details). The 'direct' flag is used by the script |
| generated in indirect mode; unless you know what you're doing, leave |
| it set to None. |
| """ |
| |
| # First, if the caller didn't force us into direct or indirect mode, |
| # figure out which mode we should be in. We take a conservative |
| # approach: choose direct mode *only* if the current interpreter is |
| # in debug mode and optimize is 0. If we're not in debug mode (-O |
| # or -OO), we don't know which level of optimization this |
| # interpreter is running with, so we can't do direct |
| # byte-compilation and be certain that it's the right thing. Thus, |
| # always compile indirectly if the current interpreter is in either |
| # optimize mode, or if either optimization level was requested by |
| # the caller. |
| if direct is None: |
| direct = (__debug__ and optimize == 0) |
| |
| # "Indirect" byte-compilation: write a temporary script and then |
| # run it with the appropriate flags. |
| if not direct: |
| from tempfile import mktemp |
| script_name = mktemp(".py") |
| if verbose: |
| print "writing byte-compilation script '%s'" % script_name |
| if not dry_run: |
| script = open(script_name, "w") |
| |
| script.write("""\ |
| from distutils.util import byte_compile |
| files = [ |
| """) |
| |
| # XXX would be nice to write absolute filenames, just for |
| # safety's sake (script should be more robust in the face of |
| # chdir'ing before running it). But this requires abspath'ing |
| # 'prefix' as well, and that breaks the hack in build_lib's |
| # 'byte_compile()' method that carefully tacks on a trailing |
| # slash (os.sep really) to make sure the prefix here is "just |
| # right". This whole prefix business is rather delicate -- the |
| # problem is that it's really a directory, but I'm treating it |
| # as a dumb string, so trailing slashes and so forth matter. |
| |
| #py_files = map(os.path.abspath, py_files) |
| #if prefix: |
| # prefix = os.path.abspath(prefix) |
| |
| script.write(string.join(map(repr, py_files), ",\n") + "]\n") |
| script.write(""" |
| byte_compile(files, optimize=%s, force=%s, |
| prefix=%s, base_dir=%s, |
| verbose=%s, dry_run=0, |
| direct=1) |
| """ % (`optimize`, `force`, `prefix`, `base_dir`, `verbose`)) |
| |
| script.close() |
| |
| cmd = [sys.executable, script_name] |
| if optimize == 1: |
| cmd.insert(1, "-O") |
| elif optimize == 2: |
| cmd.insert(1, "-OO") |
| spawn(cmd, verbose=verbose, dry_run=dry_run) |
| execute(os.remove, (script_name,), "removing %s" % script_name, |
| verbose=verbose, dry_run=dry_run) |
| |
| # "Direct" byte-compilation: use the py_compile module to compile |
| # right here, right now. Note that the script generated in indirect |
| # mode simply calls 'byte_compile()' in direct mode, a weird sort of |
| # cross-process recursion. Hey, it works! |
| else: |
| from py_compile import compile |
| |
| for file in py_files: |
| if file[-3:] != ".py": |
| # This lets us be lazy and not filter filenames in |
| # the "install_lib" command. |
| continue |
| |
| # Terminology from the py_compile module: |
| # cfile - byte-compiled file |
| # dfile - purported source filename (same as 'file' by default) |
| cfile = file + (__debug__ and "c" or "o") |
| dfile = file |
| if prefix: |
| if file[:len(prefix)] != prefix: |
| raise ValueError, \ |
| ("invalid prefix: filename %s doesn't start with %s" |
| % (`file`, `prefix`)) |
| dfile = dfile[len(prefix):] |
| if base_dir: |
| dfile = os.path.join(base_dir, dfile) |
| |
| cfile_base = os.path.basename(cfile) |
| if direct: |
| if force or newer(file, cfile): |
| if verbose: |
| print "byte-compiling %s to %s" % (file, cfile_base) |
| if not dry_run: |
| compile(file, cfile, dfile) |
| else: |
| if verbose: |
| print "skipping byte-compilation of %s to %s" % \ |
| (file, cfile_base) |
| |
| # byte_compile () |