vim-rana/plugin/packages/wakatime/stats.py

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# -*- coding: utf-8 -*-
"""
wakatime.stats
~~~~~~~~~~~~~~
Stats about files
:copyright: (c) 2013 Alan Hamlett.
:license: BSD, see LICENSE for more details.
"""
import logging
import os
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import re
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import sys
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from .compat import u, open
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from .constants import MAX_FILE_SIZE_SUPPORTED
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from .dependencies import DependencyParser
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from .language_priorities import LANGUAGES
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from .packages.pygments.lexers import (
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_iter_lexerclasses,
_fn_matches,
basename,
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ClassNotFound,
find_lexer_class,
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get_lexer_by_name,
)
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from .packages.pygments.modeline import get_filetype_from_buffer
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try:
from .packages import simplejson as json # pragma: nocover
except (ImportError, SyntaxError): # pragma: nocover
import json
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log = logging.getLogger('WakaTime')
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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:
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language, lexer = standardize_language(language, plugin)
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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
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def guess_language(file_name):
"""Guess lexer and language for a file.
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Returns a tuple of (language_str, lexer_obj).
"""
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lexer = None
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language = get_language_from_extension(file_name)
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if language:
lexer = get_lexer(language)
else:
lexer = smart_guess_lexer(file_name)
if lexer:
language = u(lexer.name)
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return language, lexer
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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
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text = get_file_head(file_name)
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lexer1, accuracy1 = guess_lexer_using_filename(file_name, text)
lexer2, accuracy2 = guess_lexer_using_modeline(text)
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if lexer1:
lexer = lexer1
if (lexer2 and accuracy2 and
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(not accuracy1 or accuracy2 > accuracy1)):
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lexer = lexer2
return lexer
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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).
"""
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lexer, accuracy = None, None
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try:
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lexer = custom_pygments_guess_lexer_for_filename(file_name, text)
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except:
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log.traceback(logging.DEBUG)
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if lexer is not None:
try:
accuracy = lexer.analyse_text(text)
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except:
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log.traceback(logging.DEBUG)
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return lexer, accuracy
def guess_lexer_using_modeline(text):
"""Guess lexer for given text using Vim modeline.
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Returns a tuple of (lexer, accuracy).
"""
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lexer, accuracy = None, None
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file_type = None
try:
file_type = get_filetype_from_buffer(text)
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except: # pragma: nocover
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log.traceback(logging.DEBUG)
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if file_type is not None:
try:
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lexer = get_lexer_by_name(file_type)
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except ClassNotFound:
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log.traceback(logging.DEBUG)
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if lexer is not None:
try:
accuracy = lexer.analyse_text(text)
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except: # pragma: nocover
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log.traceback(logging.DEBUG)
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return lexer, accuracy
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def get_language_from_extension(file_name):
"""Returns a matching language for the given file extension.
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When guessed_language is 'C', does not restrict to known file extensions.
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"""
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filepart, extension = os.path.splitext(file_name)
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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'
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available_extensions = extensions_in_same_folder(file_name)
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if '.cpp' in available_extensions:
return 'C++'
if '.c' in available_extensions:
return 'C'
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return None
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def number_lines_in_file(file_name):
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try:
if os.path.getsize(file_name) > MAX_FILE_SIZE_SUPPORTED:
return None
except os.error:
pass
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lines = 0
try:
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with open(file_name, 'r', encoding='utf-8') as fh:
for line in fh:
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lines += 1
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except: # pragma: nocover
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try:
with open(file_name, 'r', encoding=sys.getfilesystemencoding()) as fh:
for line in fh:
lines += 1
except:
return None
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return lines
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def standardize_language(language, plugin):
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"""Maps a string to the equivalent Pygments language.
Returns a tuple of (language_str, lexer_obj).
"""
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if not language:
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return None, None
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# 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:
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return standardized, get_lexer(standardized)
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# standardize language against default languages
standardized = get_language_from_json(language, 'default')
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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
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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())
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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)
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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)
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except:
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try:
with open(file_name, 'r', encoding=sys.getfilesystemencoding()) as fh:
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text = fh.read(512000) # pragma: nocover
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except:
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log.traceback(logging.DEBUG)
return text
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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)
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result.append(customize_lexer_priority(_fn, rv, lexer))
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def type_sort(t):
# sort by:
# - analyse score
# - is primary filename pattern?
# - priority
# - last resort: class name
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return (t[0], primary[t[2]], t[1], t[2].__name__)
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result.sort(key=type_sort)
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return result[-1][2](**options)
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def customize_lexer_priority(file_name, accuracy, lexer):
"""Customize lexer priority"""
priority = lexer.priority
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lexer_name = lexer.name.lower().replace('sharp', '#')
if lexer_name in LANGUAGES:
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priority = LANGUAGES[lexer_name]
elif lexer_name == 'matlab':
available_extensions = extensions_in_same_folder(file_name)
if '.mat' in available_extensions:
priority = 0.06
return (accuracy, priority, lexer)
def extensions_in_same_folder(file_name):
"""Returns a list of file extensions from the same folder as file_name."""
directory = os.path.dirname(file_name)
files = os.listdir(directory)
extensions = list(zip(*map(os.path.splitext, files)))[1]
extensions = set([ext.lower() for ext in extensions])
return extensions