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Diffstat (limited to 'setuptools/_distutils/command/build_scripts.py')
| -rw-r--r-- | setuptools/_distutils/command/build_scripts.py | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/setuptools/_distutils/command/build_scripts.py b/setuptools/_distutils/command/build_scripts.py new file mode 100644 index 0000000..e3312cf --- /dev/null +++ b/setuptools/_distutils/command/build_scripts.py @@ -0,0 +1,152 @@ +"""distutils.command.build_scripts + +Implements the Distutils 'build_scripts' command.""" + +import os, re +from stat import ST_MODE +from distutils import sysconfig +from distutils.core import Command +from distutils.dep_util import newer +from distutils.util import convert_path +from distutils import log +import tokenize + +# check if Python is called on the first line with this expression +first_line_re = re.compile(b'^#!.*python[0-9.]*([ \t].*)?$') + +class build_scripts(Command): + + description = "\"build\" scripts (copy and fixup #! line)" + + user_options = [ + ('build-dir=', 'd', "directory to \"build\" (copy) to"), + ('force', 'f', "forcibly build everything (ignore file timestamps"), + ('executable=', 'e', "specify final destination interpreter path"), + ] + + boolean_options = ['force'] + + + def initialize_options(self): + self.build_dir = None + self.scripts = None + self.force = None + self.executable = None + self.outfiles = None + + def finalize_options(self): + self.set_undefined_options('build', + ('build_scripts', 'build_dir'), + ('force', 'force'), + ('executable', 'executable')) + self.scripts = self.distribution.scripts + + def get_source_files(self): + return self.scripts + + def run(self): + if not self.scripts: + return + self.copy_scripts() + + + def copy_scripts(self): + r"""Copy each script listed in 'self.scripts'; if it's marked as a + Python script in the Unix way (first line matches 'first_line_re', + ie. starts with "\#!" and contains "python"), then adjust the first + line to refer to the current Python interpreter as we copy. + """ + self.mkpath(self.build_dir) + outfiles = [] + updated_files = [] + for script in self.scripts: + adjust = False + script = convert_path(script) + outfile = os.path.join(self.build_dir, os.path.basename(script)) + outfiles.append(outfile) + + if not self.force and not newer(script, outfile): + log.debug("not copying %s (up-to-date)", script) + continue + + # Always open the file, but ignore failures in dry-run mode -- + # that way, we'll get accurate feedback if we can read the + # script. + try: + f = open(script, "rb") + except OSError: + if not self.dry_run: + raise + f = None + else: + encoding, lines = tokenize.detect_encoding(f.readline) + f.seek(0) + first_line = f.readline() + if not first_line: + self.warn("%s is an empty file (skipping)" % script) + continue + + match = first_line_re.match(first_line) + if match: + adjust = True + post_interp = match.group(1) or b'' + + if adjust: + log.info("copying and adjusting %s -> %s", script, + self.build_dir) + updated_files.append(outfile) + if not self.dry_run: + if not sysconfig.python_build: + executable = self.executable + else: + executable = os.path.join( + sysconfig.get_config_var("BINDIR"), + "python%s%s" % (sysconfig.get_config_var("VERSION"), + sysconfig.get_config_var("EXE"))) + executable = os.fsencode(executable) + shebang = b"#!" + executable + post_interp + b"\n" + # Python parser starts to read a script using UTF-8 until + # it gets a #coding:xxx cookie. The shebang has to be the + # first line of a file, the #coding:xxx cookie cannot be + # written before. So the shebang has to be decodable from + # UTF-8. + try: + shebang.decode('utf-8') + except UnicodeDecodeError: + raise ValueError( + "The shebang ({!r}) is not decodable " + "from utf-8".format(shebang)) + # If the script is encoded to a custom encoding (use a + # #coding:xxx cookie), the shebang has to be decodable from + # the script encoding too. + try: + shebang.decode(encoding) + except UnicodeDecodeError: + raise ValueError( + "The shebang ({!r}) is not decodable " + "from the script encoding ({})" + .format(shebang, encoding)) + with open(outfile, "wb") as outf: + outf.write(shebang) + outf.writelines(f.readlines()) + if f: + f.close() + else: + if f: + f.close() + updated_files.append(outfile) + self.copy_file(script, outfile) + + if os.name == 'posix': + for file in outfiles: + if self.dry_run: + log.info("changing mode of %s", file) + else: + oldmode = os.stat(file)[ST_MODE] & 0o7777 + newmode = (oldmode | 0o555) & 0o7777 + if newmode != oldmode: + log.info("changing mode of %s from %o to %o", + file, oldmode, newmode) + os.chmod(file, newmode) + # XXX should we modify self.outfiles? + return outfiles, updated_files |