Source code for pyscaffold.contrib.setuptools_scm.utils

from __future__ import print_function, unicode_literals
import warnings
import sys
import shlex
import subprocess
import os
import io
import platform

DEBUG = bool(os.environ.get("SETUPTOOLS_SCM_DEBUG"))
IS_WINDOWS = platform.system() == 'Windows'
PY2 = sys.version_info < (3,)

[docs]def trace(*k): if DEBUG: print(*k) sys.stdout.flush()
[docs]def ensure_stripped_str(str_or_bytes): if isinstance(str_or_bytes, str): return str_or_bytes.strip() else: return str_or_bytes.decode('utf-8', 'surrogateescape').strip()
def _always_strings(env_dict): """ On Windows and Python 2, environment dictionaries must be strings and not unicode. """ if IS_WINDOWS or PY2: env_dict.update( (key, str(value)) for (key, value) in env_dict.items() ) return env_dict def _popen_pipes(cmd, cwd): return subprocess.Popen( cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, cwd=str(cwd), env=_always_strings(dict( os.environ, # try to disable i18n LC_ALL='C', LANGUAGE='', HGPLAIN='1', )) )
[docs]def do_ex(cmd, cwd='.'): trace('cmd', repr(cmd)) if == "posix" and not isinstance(cmd, (list, tuple)): cmd = shlex.split(cmd) p = _popen_pipes(cmd, cwd) out, err = p.communicate() if out: trace('out', repr(out)) if err: trace('err', repr(err)) if p.returncode: trace('ret', p.returncode) return ensure_stripped_str(out), ensure_stripped_str(err), p.returncode
[docs]def do(cmd, cwd='.'): out, err, ret = do_ex(cmd, cwd) if ret: print(err) return out
[docs]def data_from_mime(path): with, encoding='utf-8') as fp: content = trace('content', repr(content)) # the complex conditions come from reading pseudo-mime-messages data = dict( x.split(': ', 1) for x in content.splitlines() if ': ' in x) trace('data', data) return data
[docs]def has_command(name): try: p = _popen_pipes([name, 'help'], '.') except OSError: trace(*sys.exc_info()) res = False else: p.communicate() res = not p.returncode if not res: warnings.warn("%r was not found" % name) return res