diff options
Diffstat (limited to 'Lib/venv/__init__.py')
| -rw-r--r-- | Lib/venv/__init__.py | 89 |
1 files changed, 54 insertions, 35 deletions
diff --git a/Lib/venv/__init__.py b/Lib/venv/__init__.py index 95c05486af..c4540827a9 100644 --- a/Lib/venv/__init__.py +++ b/Lib/venv/__init__.py @@ -155,47 +155,66 @@ class EnvBuilder: f.write('include-system-site-packages = %s\n' % incl) f.write('version = %d.%d.%d\n' % sys.version_info[:3]) - def symlink_or_copy(self, src, dst, relative_symlinks_ok=False): - """ - Try symlinking a file, and if that fails, fall back to copying. - """ - force_copy = not self.symlinks - if not force_copy: - try: - if not os.path.islink(dst): # can't link to itself! + if os.name != 'nt': + def symlink_or_copy(self, src, dst, relative_symlinks_ok=False): + """ + Try symlinking a file, and if that fails, fall back to copying. + """ + force_copy = not self.symlinks + if not force_copy: + try: + if not os.path.islink(dst): # can't link to itself! + if relative_symlinks_ok: + assert os.path.dirname(src) == os.path.dirname(dst) + os.symlink(os.path.basename(src), dst) + else: + os.symlink(src, dst) + except Exception: # may need to use a more specific exception + logger.warning('Unable to symlink %r to %r', src, dst) + force_copy = True + if force_copy: + shutil.copyfile(src, dst) + else: + def symlink_or_copy(self, src, dst, relative_symlinks_ok=False): + """ + Try symlinking a file, and if that fails, fall back to copying. + """ + bad_src = os.path.lexists(src) and not os.path.exists(src) + if self.symlinks and not bad_src and not os.path.islink(dst): + try: if relative_symlinks_ok: assert os.path.dirname(src) == os.path.dirname(dst) os.symlink(os.path.basename(src), dst) else: os.symlink(src, dst) - except Exception: # may need to use a more specific exception - logger.warning('Unable to symlink %r to %r', src, dst) - force_copy = True - if force_copy: - if os.name == 'nt': - # On Windows, we rewrite symlinks to our base python.exe into - # copies of venvlauncher.exe - basename, ext = os.path.splitext(os.path.basename(src)) - srcfn = os.path.join(os.path.dirname(__file__), - "scripts", - "nt", - basename + ext) - # Builds or venv's from builds need to remap source file - # locations, as we do not put them into Lib/venv/scripts - if sysconfig.is_python_build(True) or not os.path.isfile(srcfn): - if basename.endswith('_d'): - ext = '_d' + ext - basename = basename[:-2] - if basename == 'python': - basename = 'venvlauncher' - elif basename == 'pythonw': - basename = 'venvwlauncher' - src = os.path.join(os.path.dirname(src), basename + ext) - else: - src = srcfn - if not os.path.exists(src): - logger.warning('Unable to copy %r', src) return + except Exception: # may need to use a more specific exception + logger.warning('Unable to symlink %r to %r', src, dst) + + # On Windows, we rewrite symlinks to our base python.exe into + # copies of venvlauncher.exe + basename, ext = os.path.splitext(os.path.basename(src)) + srcfn = os.path.join(os.path.dirname(__file__), + "scripts", + "nt", + basename + ext) + # Builds or venv's from builds need to remap source file + # locations, as we do not put them into Lib/venv/scripts + if sysconfig.is_python_build(True) or not os.path.isfile(srcfn): + if basename.endswith('_d'): + ext = '_d' + ext + basename = basename[:-2] + if basename == 'python': + basename = 'venvlauncher' + elif basename == 'pythonw': + basename = 'venvwlauncher' + src = os.path.join(os.path.dirname(src), basename + ext) + else: + src = srcfn + if not os.path.exists(src): + if not bad_src: + logger.warning('Unable to copy %r', src) + return shutil.copyfile(src, dst) |