vim-rana/plugin/packages/wakatime/stats.py
2017-05-24 23:56:51 -07:00

323 lines
8.7 KiB
Python

# -*- coding: utf-8 -*-
"""
wakatime.stats
~~~~~~~~~~~~~~
Stats about files
:copyright: (c) 2013 Alan Hamlett.
:license: BSD, see LICENSE for more details.
"""
import logging
import os
import re
import sys
from .compat import u, open
from .constants import MAX_FILE_SIZE_SUPPORTED
from .dependencies import DependencyParser
from .language_priorities import LANGUAGES
from .packages.pygments.lexers import (
_iter_lexerclasses,
_fn_matches,
basename,
ClassNotFound,
find_lexer_class,
get_lexer_by_name,
)
from .packages.pygments.modeline import get_filetype_from_buffer
try:
from .packages import simplejson as json # pragma: nocover
except (ImportError, SyntaxError): # pragma: nocover
import json
log = logging.getLogger('WakaTime')
def get_file_stats(file_name, entity_type='file', lineno=None, cursorpos=None,
plugin=None, language=None):
if entity_type != 'file':
stats = {
'language': None,
'dependencies': [],
'lines': None,
'lineno': lineno,
'cursorpos': cursorpos,
}
else:
language, lexer = standardize_language(language, plugin)
if not language:
language, lexer = guess_language(file_name)
parser = DependencyParser(file_name, lexer)
dependencies = parser.parse()
stats = {
'language': language,
'dependencies': dependencies,
'lines': number_lines_in_file(file_name),
'lineno': lineno,
'cursorpos': cursorpos,
}
return stats
def guess_language(file_name):
"""Guess lexer and language for a file.
Returns a tuple of (language_str, lexer_obj).
"""
lexer = None
language = get_language_from_extension(file_name)
if language:
lexer = get_lexer(language)
else:
lexer = smart_guess_lexer(file_name)
if lexer:
language = u(lexer.name)
return language, lexer
def smart_guess_lexer(file_name):
"""Guess Pygments lexer for a file.
Looks for a vim modeline in file contents, then compares the accuracy
of that lexer with a second guess. The second guess looks up all lexers
matching the file name, then runs a text analysis for the best choice.
"""
lexer = None
text = get_file_head(file_name)
lexer1, accuracy1 = guess_lexer_using_filename(file_name, text)
lexer2, accuracy2 = guess_lexer_using_modeline(text)
if lexer1:
lexer = lexer1
if (lexer2 and accuracy2 and
(not accuracy1 or accuracy2 > accuracy1)):
lexer = lexer2
return lexer
def guess_lexer_using_filename(file_name, text):
"""Guess lexer for given text, limited to lexers for this file's extension.
Returns a tuple of (lexer, accuracy).
"""
lexer, accuracy = None, None
try:
lexer = custom_pygments_guess_lexer_for_filename(file_name, text)
except:
log.traceback(logging.DEBUG)
if lexer is not None:
try:
accuracy = lexer.analyse_text(text)
except:
log.traceback(logging.DEBUG)
return lexer, accuracy
def guess_lexer_using_modeline(text):
"""Guess lexer for given text using Vim modeline.
Returns a tuple of (lexer, accuracy).
"""
lexer, accuracy = None, None
file_type = None
try:
file_type = get_filetype_from_buffer(text)
except: # pragma: nocover
log.traceback(logging.DEBUG)
if file_type is not None:
try:
lexer = get_lexer_by_name(file_type)
except ClassNotFound:
log.traceback(logging.DEBUG)
if lexer is not None:
try:
accuracy = lexer.analyse_text(text)
except: # pragma: nocover
log.traceback(logging.DEBUG)
return lexer, accuracy
def get_language_from_extension(file_name):
"""Returns a matching language for the given file extension.
When guessed_language is 'C', does not restrict to known file extensions.
"""
filepart, extension = os.path.splitext(file_name)
if re.match(r'\.h.*', extension, re.IGNORECASE) or re.match(r'\.c.*', extension, re.IGNORECASE):
if os.path.exists(u('{0}{1}').format(u(filepart), u('.c'))) or os.path.exists(u('{0}{1}').format(u(filepart), u('.C'))):
return 'C'
directory = os.path.dirname(file_name)
available_files = os.listdir(directory)
available_extensions = list(zip(*map(os.path.splitext, available_files)))[1]
available_extensions = [ext.lower() for ext in available_extensions]
if '.cpp' in available_extensions:
return 'C++'
if '.c' in available_extensions:
return 'C'
return None
def number_lines_in_file(file_name):
try:
if os.path.getsize(file_name) > MAX_FILE_SIZE_SUPPORTED:
return None
except os.error:
pass
lines = 0
try:
with open(file_name, 'r', encoding='utf-8') as fh:
for line in fh:
lines += 1
except: # pragma: nocover
try:
with open(file_name, 'r', encoding=sys.getfilesystemencoding()) as fh:
for line in fh:
lines += 1
except:
return None
return lines
def standardize_language(language, plugin):
"""Maps a string to the equivalent Pygments language.
Returns a tuple of (language_str, lexer_obj).
"""
if not language:
return None, None
# standardize language for this plugin
if plugin:
plugin = plugin.split(' ')[-1].split('/')[0].split('-')[0]
standardized = get_language_from_json(language, plugin)
if standardized is not None:
return standardized, get_lexer(standardized)
# standardize language against default languages
standardized = get_language_from_json(language, 'default')
return standardized, get_lexer(standardized)
def get_lexer(language):
"""Return a Pygments Lexer object for the given language string."""
if not language:
return None
lexer_cls = find_lexer_class(language)
if lexer_cls:
return lexer_cls()
return None
def get_language_from_json(language, key):
"""Finds the given language in a json file."""
file_name = os.path.join(
os.path.dirname(__file__),
'languages',
'{0}.json').format(key.lower())
if os.path.exists(file_name):
try:
with open(file_name, 'r', encoding='utf-8') as fh:
languages = json.loads(fh.read())
if languages.get(language.lower()):
return languages[language.lower()]
except:
log.traceback(logging.DEBUG)
return None
def get_file_head(file_name):
"""Returns the first 512000 bytes of the file's contents."""
text = None
try:
with open(file_name, 'r', encoding='utf-8') as fh:
text = fh.read(512000)
except:
try:
with open(file_name, 'r', encoding=sys.getfilesystemencoding()) as fh:
text = fh.read(512000) # pragma: nocover
except:
log.traceback(logging.DEBUG)
return text
def custom_pygments_guess_lexer_for_filename(_fn, _text, **options):
"""Overwrite pygments.lexers.guess_lexer_for_filename to customize the
priority of different lexers based on popularity of languages."""
fn = basename(_fn)
primary = {}
matching_lexers = set()
for lexer in _iter_lexerclasses():
for filename in lexer.filenames:
if _fn_matches(fn, filename):
matching_lexers.add(lexer)
primary[lexer] = True
for filename in lexer.alias_filenames:
if _fn_matches(fn, filename):
matching_lexers.add(lexer)
primary[lexer] = False
if not matching_lexers:
raise ClassNotFound('no lexer for filename %r found' % fn)
if len(matching_lexers) == 1:
return matching_lexers.pop()(**options)
result = []
for lexer in matching_lexers:
rv = lexer.analyse_text(_text)
if rv == 1.0:
return lexer(**options)
result.append((rv, customize_priority(lexer)))
def type_sort(t):
# sort by:
# - analyse score
# - is primary filename pattern?
# - priority
# - last resort: class name
return (t[0], primary[t[1]], t[1].priority, t[1].__name__)
result.sort(key=type_sort)
return result[-1][1](**options)
def customize_priority(lexer):
"""Return an integer priority for the given lexer object."""
lexer_name = lexer.name.lower().replace('sharp', '#')
if lexer_name in LANGUAGES:
lexer.priority = LANGUAGES[lexer_name]
return lexer