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https://github.com/kovidgoyal/calibre.git
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Finish up find_programs implementation for linux
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Kovid Goyal
parent
667f42ba1a
commit
0ef6a7fbc3
@ -6,23 +6,159 @@ from __future__ import (unicode_literals, division, absolute_import,
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__license__ = 'GPL v3'
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__copyright__ = '2015, Kovid Goyal <kovid at kovidgoyal.net>'
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import os
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import os, re, shlex, cPickle
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from collections import defaultdict
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from calibre import force_unicode, walk
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from calibre.constants import iswindows, isosx, filesystem_encoding
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from calibre import force_unicode, walk, guess_type, prints
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from calibre.constants import iswindows, isosx, filesystem_encoding, cache_dir
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from calibre.utils.localization import canonicalize_lang, get_lang
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if iswindows:
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pass
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elif isosx:
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pass
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else:
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def parse_localized_key(key):
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name, rest = key.partition('[')[0::2]
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if not rest:
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return name, None
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rest = rest[:-1]
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lang = re.split(r'[_.@]', rest)[0]
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return name, canonicalize_lang(lang)
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def unquote_exec(val):
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val = val.replace(r'\\', '\\')
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return shlex.split(val)
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def parse_desktop_file(path):
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gpat = re.compile(r'^\[(.+?)\]\s*$')
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kpat = re.compile(r'^([-a-zA-Z0-9\[\]@_.]+)\s*=\s*(.+)$')
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try:
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with open(path, 'rb') as f:
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raw = f.read()
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raw
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except EnvironmentError:
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raw = f.read().decode('utf-8')
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except (EnvironmentError, UnicodeDecodeError):
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return
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group = None
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ans = {}
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for line in raw.splitlines():
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m = gpat.match(line)
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if m is not None:
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if group == 'Desktop Entry':
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break
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group = m.group(1)
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continue
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if group == 'Desktop Entry':
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m = kpat.match(line)
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if m is not None:
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k, v = m.group(1), m.group(2)
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if k == 'Hidden' and v == 'true':
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return
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if k == 'Type' and v != 'Application':
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return
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if k == 'Exec':
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cmdline = unquote_exec(v)
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if cmdline and (not os.path.isabs(cmdline[0]) or os.access(cmdline[0], os.X_OK)):
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ans[k] = cmdline
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elif k == 'MimeType':
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ans[k] = frozenset(x.strip() for x in v.split(';'))
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elif k in {'Name', 'GenericName', 'Comment', 'Icon'} or '[' in k:
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name, lang = parse_localized_key(k)
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if name not in ans:
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ans[name] = {}
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ans[name][lang] = v
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else:
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ans[k] = v
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if 'Exec' in ans and 'MimeType' in ans:
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return ans
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icon_data = None
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def find_icons():
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global icon_data
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if icon_data is not None:
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return icon_data
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base_dirs = [os.path.expanduser('~/.icons')] + [
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os.path.join(b, 'icons') for b in os.environ.get(
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'XDG_DATA_DIRS', '/usr/local/share:/usr/share').split(os.pathsep)] + [
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'/usr/share/pixmaps']
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ans = defaultdict(list)
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sz_pat = re.compile(r'/((?:\d+x\d+)|scalable)/')
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cache_file = os.path.join(cache_dir(), 'icon-theme-cache.pickle')
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exts = {'.svg', '.png', '.xpm'}
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def read_icon_theme_dir(dirpath):
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ans = defaultdict(list)
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for path in walk(dirpath):
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bn = os.path.basename(path)
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name, ext = os.path.splitext(bn)
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if ext in exts:
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sz = sz_pat.findall(path)
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if sz:
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sz = sz[-1]
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if sz == 'scalable':
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sz = 100000
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else:
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sz = int(sz.partition('x')[0])
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idx = len(ans[name])
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ans[name].append((-sz, idx, sz, path))
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for icons in ans.itervalues():
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icons.sort()
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return {k:(-v[0][2], v[0][3]) for k, v in ans.iteritems()}
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try:
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with open(cache_file, 'rb') as f:
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cache = cPickle.load(f)
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mtimes, cache = cache['mtimes'], cache['data']
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except Exception:
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mtimes, cache = defaultdict(int), defaultdict(dict)
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seen_dirs = set()
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changed = False
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for loc in base_dirs:
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try:
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subdirs = os.listdir(loc)
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except EnvironmentError:
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continue
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for dname in subdirs:
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d = os.path.join(loc, dname)
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if os.path.isdir(d):
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try:
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mtime = os.stat(d).st_mtime
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except EnvironmentError:
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continue
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seen_dirs.add(d)
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if mtime != mtimes[d]:
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changed = True
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try:
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cache[d] = read_icon_theme_dir(d)
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except Exception:
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prints('Failed to read icon theme dir: %r with error:' % d)
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import traceback
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traceback.print_exc()
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mtimes[d] = mtime
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for name, data in cache[d].iteritems():
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ans[name].append(data)
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for removed in set(mtimes) - seen_dirs:
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mtimes.pop(removed), cache.pop(removed)
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changed = True
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if changed:
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try:
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with open(cache_file, 'wb') as f:
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cPickle.dump({'data':cache, 'mtimes':mtimes}, f, -1)
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except Exception:
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import traceback
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traceback.print_exc()
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for icons in ans.itervalues():
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icons.sort()
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icon_data = {k:v[0][1] for k, v in ans.iteritems()}
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return icon_data
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def localize_string(data):
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lang = canonicalize_lang(get_lang())
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return data.get(lang, data.get(None)) or ''
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def find_programs(extensions):
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extensions = {ext.lower() for ext in extensions}
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@ -31,13 +167,31 @@ else:
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data_dirs = [force_unicode(x, filesystem_encoding).rstrip(os.sep) for x in data_dirs]
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data_dirs = [x for x in data_dirs if x and os.path.isdir(x)]
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desktop_files = {}
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mime_types = {guess_type('file.' + ext)[0] for ext in extensions}
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for base in data_dirs:
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for f in walk(os.path.join(base, 'applications')):
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if f.endswith('.desktop'):
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bn = os.path.basename(f)
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if f not in desktop_files:
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desktop_files[bn] = f
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for bn, path in desktop_files.iteritems():
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try:
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data = parse_desktop_file(path)
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except Exception:
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continue
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if data is not None and mime_types.intersection(data['MimeType']):
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icon = data.get('Icon', {}).get(None)
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if icon and not os.path.isabs(icon):
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icon = find_icons().get(icon)
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if icon:
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data['Icon'] = icon
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else:
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data.pop('Icon')
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for k in ('Name', 'GenericName', 'Comment'):
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val = data.get(k)
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if val:
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data[k] = localize_string(val)
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yield data
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if __name__ == '__main__':
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print (find_programs('jpg jpeg'.split()))
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