Stickum

Stickum, there's no better way.
Python code pasted @ 05:08 on Mon, 08 Jan 07
Copy & Paste Plain Text
1 
# middleware.py
2
3 
from paste.deploy.config import ConfigMiddleware
4
5 
def make_config_filter(app, global_conf, **local_conf):
6 
    conf = build_app_config(global_conf, local_conf)
7 
    conf.push_as_process_config()
8 
    return ConfigMiddleware(app, conf)
9
10 
### _cpconfig.py
11 
import sys, os, glob, re
12
13 
import turbogears
14 
from paste.deploy.config import CONFIG
15 
from configobj import ConfigObj
16 
import pkg_resources
17 
import logging
18 
import logging.handlers
19 
import cherrypy
20
21 
__all__ = [
22 
    "TGConfig",
23 
    "build_app_config",
24 
    ]
25
26 
# Monkey-path CP's config with a multi-wsgi app aware one
27 
# and make it availbale at the turbogears namespace
28 
cherrypy.config = turbogears.config = CONFIG
29
30 
class ConfigError(Exception):
31 
    pass
32
33
34 
def build_app_config(global_conf, local_conf):
35 
    deploy_config = global_conf.copy()
36 
    deploy_config.update(local_conf)
37 
    deploy_config.update(dict(global_conf=global_conf, local_conf=local_conf))
38 
    cp_configfile = deploy_config.get('cp_configfile', None)
39 
    cp_configmodule = deploy_config.get('cp_configmodule', None)
40 
    config = TGConfig(cp_configfile, cp_configmodule)
41 
    # Options passed from deployment config override those at app config
42 
    config.update(deploy_config)
43 
    return config
44
45
46 
def config_defaults():
47 
    current_dir_uri = os.path.abspath(os.getcwd())
48 
    if not current_dir_uri.startswith("/"):
49 
        current_dir_uri = "/" + current_dir_uri
50 
    defaults = {'current_dir_uri' : current_dir_uri}
51 
    return defaults
52
53 
def non_interpolating_config_obj(configfile={}, defaults={}):
54 
    """ Returns a ConfigObj instance that doesn't preform interpolation.
55 
    Can optionally pass defaults which will be merged with DEFAULT."""
56 
    configdata = ConfigObj(configfile, unrepr=True)
57 
    configdata.interpolation = False
58 
    configdata.merge(dict(DEFAULT=defaults))
59 
    return configdata
60
61 
class TGConfig(cherrypy._cpconfig.Config):
62 
    def __init__(self, configfile = None, modulename = None):
63 
        defaults = config_defaults()
64 
        configdata = non_interpolating_config_obj(defaults=defaults)
65 
        if modulename:
66 
            lastdot = modulename.rfind(".")
67 
            firstdot = modulename.find(".")
68 
            packagename = modulename[:lastdot]
69 
            top_level_package = modulename[:firstdot]
70
71 
            modname = modulename[lastdot+1:]
72 
            modfile = pkg_resources.resource_filename(packagename,
73 
                                            modname + ".cfg")
74 
            if not os.path.exists(modfile):
75 
                modfile = pkg_resources.resource_filename(packagename,
76 
                                                modname)
77 
            if os.path.isdir(modfile):
78 
                configfiles = glob.glob(os.path.join(modfile, "*.cfg"))
79 
            else:
80 
                configfiles = [modfile]
81 
            top_level_dir = pkg_resources.resource_filename(
82 
                            top_level_package, "")[:-1].replace("\\", "/")
83 
            package_dir = pkg_resources.resource_filename(
84 
                            packagename, "")[:-1].replace("\\", "/")
85 
            defaults.update(dict(top_level_dir=top_level_dir,
86 
                                 package_dir=package_dir))
87 
            configdata.merge(defaults)
88 
            for file in configfiles:
89 
                configdata2 = non_interpolating_config_obj(file, defaults)
90 
                configdata.merge(configdata2)
91
92 
        if configfile:
93 
            configdata2 = non_interpolating_config_obj(configfile, defaults)
94 
            configdata.merge(configdata2)
95
96 
        configdata.merge(configdata.pop('global', {}))
97 
        configdict = ConfigObj(configdata, unrepr=True).dict()
98 
        #configure_loggers(configdict)
99 
        self.update(configdict)
100
101 
    def update_config(self, configfile = None, modulename = None):
102 
        """Updates 'config' (or apps's global config if omitted)  either from a
103 
        ConfigObj (INI-style) config file, a module name specified in dotted
104 
        notation or both (the module name is assumed to have a ".cfg" extension).
105 
        If both are specified, the module is called first,
106 
        followed by the config file. This means that the config file's options
107 
        override the options in the module file."""
108 
        new = self.__class__(configfile, modulename)
109 
        self.update(new)
110
111 
    def get(self, key, default_value=None):
112 
        """Retrieves a config value"""
113 
        value = super(TGConfig, self).get(key, default_value)
114 
        if value and key == 'sqlobject.dburi' and os.name == "nt":
115 
            value = re.sub('///(\w):', '///\\1|', value)
116 
        return value
117
118 
    def push_as_process_config(self):
119 
        """Sets a process-wide config."""
120 
        return CONFIG.push_process_config(self)
121