Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)
This commit is contained in:
231
Dependencies/Python/Lib/linecache.py
vendored
Normal file
231
Dependencies/Python/Lib/linecache.py
vendored
Normal file
@ -0,0 +1,231 @@
|
||||
"""Cache lines from Python source files.
|
||||
|
||||
This is intended to read lines from modules imported -- hence if a filename
|
||||
is not found, it will look down the module search path for a file by
|
||||
that name.
|
||||
"""
|
||||
|
||||
__all__ = ["getline", "clearcache", "checkcache", "lazycache"]
|
||||
|
||||
|
||||
# The cache. Maps filenames to either a thunk which will provide source code,
|
||||
# or a tuple (size, mtime, lines, fullname) once loaded.
|
||||
cache = {}
|
||||
_interactive_cache = {}
|
||||
|
||||
|
||||
def clearcache():
|
||||
"""Clear the cache entirely."""
|
||||
cache.clear()
|
||||
|
||||
|
||||
def getline(filename, lineno, module_globals=None):
|
||||
"""Get a line for a Python source file from the cache.
|
||||
Update the cache if it doesn't contain an entry for this file already."""
|
||||
|
||||
lines = getlines(filename, module_globals)
|
||||
if 1 <= lineno <= len(lines):
|
||||
return lines[lineno - 1]
|
||||
return ''
|
||||
|
||||
|
||||
def getlines(filename, module_globals=None):
|
||||
"""Get the lines for a Python source file from the cache.
|
||||
Update the cache if it doesn't contain an entry for this file already."""
|
||||
|
||||
if filename in cache:
|
||||
entry = cache[filename]
|
||||
if len(entry) != 1:
|
||||
return cache[filename][2]
|
||||
|
||||
try:
|
||||
return updatecache(filename, module_globals)
|
||||
except MemoryError:
|
||||
clearcache()
|
||||
return []
|
||||
|
||||
|
||||
def _getline_from_code(filename, lineno):
|
||||
lines = _getlines_from_code(filename)
|
||||
if 1 <= lineno <= len(lines):
|
||||
return lines[lineno - 1]
|
||||
return ''
|
||||
|
||||
def _make_key(code):
|
||||
return (code.co_filename, code.co_qualname, code.co_firstlineno)
|
||||
|
||||
def _getlines_from_code(code):
|
||||
code_id = _make_key(code)
|
||||
if code_id in _interactive_cache:
|
||||
entry = _interactive_cache[code_id]
|
||||
if len(entry) != 1:
|
||||
return _interactive_cache[code_id][2]
|
||||
return []
|
||||
|
||||
|
||||
def checkcache(filename=None):
|
||||
"""Discard cache entries that are out of date.
|
||||
(This is not checked upon each call!)"""
|
||||
|
||||
if filename is None:
|
||||
# get keys atomically
|
||||
filenames = cache.copy().keys()
|
||||
else:
|
||||
filenames = [filename]
|
||||
|
||||
for filename in filenames:
|
||||
try:
|
||||
entry = cache[filename]
|
||||
except KeyError:
|
||||
continue
|
||||
|
||||
if len(entry) == 1:
|
||||
# lazy cache entry, leave it lazy.
|
||||
continue
|
||||
size, mtime, lines, fullname = entry
|
||||
if mtime is None:
|
||||
continue # no-op for files loaded via a __loader__
|
||||
try:
|
||||
# This import can fail if the interpreter is shutting down
|
||||
import os
|
||||
except ImportError:
|
||||
return
|
||||
try:
|
||||
stat = os.stat(fullname)
|
||||
except (OSError, ValueError):
|
||||
cache.pop(filename, None)
|
||||
continue
|
||||
if size != stat.st_size or mtime != stat.st_mtime:
|
||||
cache.pop(filename, None)
|
||||
|
||||
|
||||
def updatecache(filename, module_globals=None):
|
||||
"""Update a cache entry and return its list of lines.
|
||||
If something's wrong, print a message, discard the cache entry,
|
||||
and return an empty list."""
|
||||
|
||||
# These imports are not at top level because linecache is in the critical
|
||||
# path of the interpreter startup and importing os and sys take a lot of time
|
||||
# and slows down the startup sequence.
|
||||
try:
|
||||
import os
|
||||
import sys
|
||||
import tokenize
|
||||
except ImportError:
|
||||
# These import can fail if the interpreter is shutting down
|
||||
return []
|
||||
|
||||
if filename in cache:
|
||||
if len(cache[filename]) != 1:
|
||||
cache.pop(filename, None)
|
||||
if not filename or (filename.startswith('<') and filename.endswith('>')):
|
||||
return []
|
||||
|
||||
fullname = filename
|
||||
try:
|
||||
stat = os.stat(fullname)
|
||||
except OSError:
|
||||
basename = filename
|
||||
|
||||
# Realise a lazy loader based lookup if there is one
|
||||
# otherwise try to lookup right now.
|
||||
if lazycache(filename, module_globals):
|
||||
try:
|
||||
data = cache[filename][0]()
|
||||
except (ImportError, OSError):
|
||||
pass
|
||||
else:
|
||||
if data is None:
|
||||
# No luck, the PEP302 loader cannot find the source
|
||||
# for this module.
|
||||
return []
|
||||
cache[filename] = (
|
||||
len(data),
|
||||
None,
|
||||
[line + '\n' for line in data.splitlines()],
|
||||
fullname
|
||||
)
|
||||
return cache[filename][2]
|
||||
|
||||
# Try looking through the module search path, which is only useful
|
||||
# when handling a relative filename.
|
||||
if os.path.isabs(filename):
|
||||
return []
|
||||
|
||||
for dirname in sys.path:
|
||||
try:
|
||||
fullname = os.path.join(dirname, basename)
|
||||
except (TypeError, AttributeError):
|
||||
# Not sufficiently string-like to do anything useful with.
|
||||
continue
|
||||
try:
|
||||
stat = os.stat(fullname)
|
||||
break
|
||||
except (OSError, ValueError):
|
||||
pass
|
||||
else:
|
||||
return []
|
||||
except ValueError: # may be raised by os.stat()
|
||||
return []
|
||||
try:
|
||||
with tokenize.open(fullname) as fp:
|
||||
lines = fp.readlines()
|
||||
except (OSError, UnicodeDecodeError, SyntaxError):
|
||||
return []
|
||||
if not lines:
|
||||
lines = ['\n']
|
||||
elif not lines[-1].endswith('\n'):
|
||||
lines[-1] += '\n'
|
||||
size, mtime = stat.st_size, stat.st_mtime
|
||||
cache[filename] = size, mtime, lines, fullname
|
||||
return lines
|
||||
|
||||
|
||||
def lazycache(filename, module_globals):
|
||||
"""Seed the cache for filename with module_globals.
|
||||
|
||||
The module loader will be asked for the source only when getlines is
|
||||
called, not immediately.
|
||||
|
||||
If there is an entry in the cache already, it is not altered.
|
||||
|
||||
:return: True if a lazy load is registered in the cache,
|
||||
otherwise False. To register such a load a module loader with a
|
||||
get_source method must be found, the filename must be a cacheable
|
||||
filename, and the filename must not be already cached.
|
||||
"""
|
||||
if filename in cache:
|
||||
if len(cache[filename]) == 1:
|
||||
return True
|
||||
else:
|
||||
return False
|
||||
if not filename or (filename.startswith('<') and filename.endswith('>')):
|
||||
return False
|
||||
# Try for a __loader__, if available
|
||||
if module_globals and '__name__' in module_globals:
|
||||
spec = module_globals.get('__spec__')
|
||||
name = getattr(spec, 'name', None) or module_globals['__name__']
|
||||
loader = getattr(spec, 'loader', None)
|
||||
if loader is None:
|
||||
loader = module_globals.get('__loader__')
|
||||
get_source = getattr(loader, 'get_source', None)
|
||||
|
||||
if name and get_source:
|
||||
def get_lines(name=name, *args, **kwargs):
|
||||
return get_source(name, *args, **kwargs)
|
||||
cache[filename] = (get_lines,)
|
||||
return True
|
||||
return False
|
||||
|
||||
def _register_code(code, string, name):
|
||||
entry = (len(string),
|
||||
None,
|
||||
[line + '\n' for line in string.splitlines()],
|
||||
name)
|
||||
stack = [code]
|
||||
while stack:
|
||||
code = stack.pop()
|
||||
for const in code.co_consts:
|
||||
if isinstance(const, type(code)):
|
||||
stack.append(const)
|
||||
_interactive_cache[_make_key(code)] = entry
|
||||
Reference in New Issue
Block a user