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import web
import json
import uuid
import re
import StringIO
import base64
from portage.versions import catpkgsplit
# matplotlib requires a writable home directory
import os
os.environ['HOME'] = '/tmp'
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
def is_uuid(uuid):
"""
Check uuid validity
"""
regex = re.compile(r'^(\w{8})-(\w{4})-(\w{4})-(\w{4})-(\w{12})$')
return regex.search(uuid)
def uuidbin(string):
"""
Convert uuid string to raw bytes
"""
u = uuid.UUID(string)
return u.bytes
def pkgsplit(pkgname):
"""
Custom pkgsplit
"""
cpv={'cat':'','pkg':'','ver':''}
cpvr = catpkgsplit(pkgname)
if cpvr is None:
pkgsplit = pkgname.split('/')
cpv['cat'] = pkgsplit[0]
cpv['pkg'] = pkgsplit[1]
else:
cpv['cat'] = cpvr[0]
cpv['pkg'] = cpvr[1]
cpv['ver'] = cpvr[2]
if cpvr[3] != 'r0':
cpv['ver'] = cpv['ver'] + '-' + cpvr[3]
return cpv
def get_kwkey(db, keyword):
"""
Lookup keyword and return index key. Insert keyword if not found.
"""
if keyword is None:
return None
db_keyword = db.select('KEYWORDS', vars={'keyword':keyword}, where='KEYWORD=$keyword')
if len(db_keyword):
kwkey = db_keyword[0]['KWKEY']
else:
kwkey = db.insert('KEYWORDS', KEYWORD=keyword)
return kwkey
def get_lkey(db, lang):
"""
Lookup lang and return index key. Insert lang if not found.
"""
if lang is None:
return None
db_lang = db.select('LANG', vars={'lang':lang}, where='LANG=$lang')
if len(db_lang):
lkey = db_lang[0]['LKEY']
else:
lkey = db.insert('LANG', LANG=lang)
return lkey
def get_fkey(db, feature):
"""
Lookup feature and return index key. Insert feature if not found.
"""
if feature is None:
return None
db_feature = db.select('FEATURES', vars={'feature':feature}, where='FEATURE=$feature')
if len(db_feature):
fkey = db_feature[0]['FKEY']
else:
fkey = db.insert('FEATURES', FEATURE=feature)
return fkey
def get_mkey(db, mirror):
"""
Lookup mirror and return index key. Insert mirror if not found.
"""
if mirror is None:
return None
db_mirror = db.select('GENTOO_MIRRORS', vars={'mirror':mirror}, where='MIRROR=$mirror')
if len(db_mirror):
mkey = db_mirror[0]['MKEY']
else:
mkey = db.insert('GENTOO_MIRRORS', MIRROR=mirror)
return mkey
def get_ukey(db, useflag):
"""
Lookup useflag and return index key. Insert useflag if not found.
"""
if useflag is None:
return None
db_useflag = db.select('USEFLAGS', vars={'useflag':useflag}, where='USEFLAG=$useflag')
if len(db_useflag):
ukey = db_useflag[0]['UKEY']
else:
ukey = db.insert('USEFLAGS', USEFLAG=useflag)
return ukey
def get_pkey(db, package):
"""
Lookup package and return index key. Insert package if not found.
"""
if package is None:
return None
cpv = pkgsplit(package)
db_package = db.select('PACKAGES', vars=cpv, where='CAT=$cat and PKG=$pkg and VER=$ver')
if len(db_package):
pkey = db_package[0]['PKEY']
else:
pkey = db.insert('PACKAGES', CAT=cpv['cat'], PKG=cpv['pkg'], VER=cpv['ver'])
return pkey
def get_rkey(db, repo):
"""
Lookup repo and return index key. Insert repo if not found.
"""
if repo is None:
return None
db_repo = db.select('REPOSITORIES', vars={'repo':repo}, where='REPO=$repo')
if len(db_repo):
rkey = db_repo[0]['RKEY']
else:
rkey = db.insert('REPOSITORIES', REPO=repo)
return rkey
def is_json_request():
"""
Check for json headers
"""
return web.ctx.environ['HTTP_ACCEPT'].find('json') != -1
def serialize(object, human=True):
"""
Encode object in json
"""
if human:
indent = 2
else:
indent = None
return json.JSONEncoder(indent=indent).encode(object)
def barchart(title, x_label, x_ticklabels, y_label, y_values):
"""
Generate a barchart and return base64 encoded image data
"""
fig = Figure()
canvas = FigureCanvas(fig)
ind = range(len(y_values))
ax = fig.add_subplot(1, 1, 1)
ax.set_title(title)
ax.set_xlabel(x_label)
ax.set_ylabel(y_label)
ax.set_xticks(ind)
ax.set_xticklabels(x_ticklabels)
ax.bar(ind, y_values, align='center')
ret = StringIO.StringIO()
canvas.print_figure(ret)
return base64.b64encode(ret.getvalue())
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