789d34255fd809775367e534cd0d5d065c23694f
[redakcja.git] / deployment.py
1 from __future__ import with_statement
2
3 import shutil
4 import os
5 import sys
6 import logging
7
8 logging.basicConfig(stream=sys.stderr, format="%(levelname)s:: %(message)s", level=logging.INFO)
9
10 from string import Template
11
12 class DeploySite(object):
13
14     def __init__(self, **env):
15         self.env = env
16
17         for arg in ('ROOT', 'PROJECT_NAME', 'PYTHON_VERSION'):
18             if arg not in self.env:
19                 raise ValueError("Argument '%s' is required." % arg)
20
21         if 'PYTHON_BASE' not in self.env:
22             self.env['PYTHON_BASE'] = os.path.join(self.env['ROOT'], 'pythonenv')
23
24         if 'PYTHON_BIN' not in self.env:
25             self.env['PYTHON_BIN'] = os.path.join(
26                         self.env['PYTHON_BASE'], 'bin', 'python') + self.env['PYTHON_VERSION']
27
28         if 'PIP_BIN' not in self.env:
29             self.env['PIP_BIN'] = os.path.join(self.env['PYTHON_BASE'], 'bin', 'pip')
30
31         if 'PYTHON_SITE' not in self.env:
32             self.env['PYTHON_SITE'] = os.path.join(
33                         self.env['PYTHON_BASE'], 'lib',
34                         'python' + self.env['PYTHON_VERSION'], 'site-packages')
35
36         if 'APP_DIR' not in self.env:
37             self.env['APP_DIR'] = os.path.join(self.env['ROOT'], 'application')
38
39         if 'CONFIG_DIR' not in self.env:
40             self.env['CONFIG_DIR'] = os.path.join(self.env['ROOT'], 'etc')
41
42         if 'MEDIA_DIR' not in self.env:
43             self.env['MEDIA_DIR'] = os.path.join(self.env['ROOT'], 'www', 'media')
44
45         self._logger = logging.getLogger("deployment")
46
47     def info(self, *args, **kwargs):
48         self._logger.info(*args, **kwargs)
49
50     def render_template(self, source, dest, extra_context={}):
51         self.info("Rendering template: %s", source)
52
53         with open(source, 'rb') as source_file:
54             t = Template(source_file.read())
55
56         context = dict(self.env)
57         context.update(extra_context)
58
59         with open(dest, 'wb') as dest_file:
60             dest_file.write(t.safe_substitute(context))
61
62         self.info("Done.")
63
64     def restart_app(self):
65         pass
66
67     def update_app(self):
68         pass
69
70     def install_dependencies(self):
71         pass
72
73     def deploy(self):
74         self.update_app()
75         self.install_dependencies()
76         self.update_config()
77         self.restart_app()
78
79     def find_resource(self, path):
80         for dir in (self.env['CONFIG_DIR'], self.env['APP_DIR']):
81             full_path = os.path.join(dir, path)
82             if os.path.isfile(full_path):
83                 return full_path
84
85         raise ValueError("Resource '%s' not found" % path)
86
87     @classmethod
88     def run_deploy(cls, *args, **kwargs):
89         site = cls(*args, **kwargs)
90         return site.deploy()
91
92 class WSGISite(DeploySite):
93
94     def __init__(self, **env):
95         super(WSGISite, self).__init__(**env)
96
97         if 'WSGI_FILE' not in self.env:
98             self.env['WSGI_FILE'] = os.path.join(self.env['ROOT'], 'www',
99                                         'wsgi', self.env['PROJECT_NAME']) + '.wsgi'
100
101         if 'WSGI_SOURCE_FILE' not in self.env:
102             self.env['WSGI_SOURCE_FILE'] = 'wsgi_app.template'
103
104         if 'WSGI_USER' not in self.env:
105             self.env['WSGI_USER'] = 'www-data'
106
107     def restart_app(self):
108         self.info("Restarting wsgi application: %s", self.env['WSGI_FILE'])
109         os.system("touch %s" % self.env['WSGI_FILE'])
110
111     def update_config(self):
112         source = self.find_resource(self.env['WSGI_SOURCE_FILE'])
113         self.render_template(source, self.env['WSGI_FILE'])
114
115 class PIPSite(DeploySite):
116
117     def install_dependencies(self):
118         self.info("Installing requirements")
119         os.system("%s install -r %s" % (self.env['PIP_BIN'], self.find_resource('requirements.txt')))
120
121         try:
122             self.info("Installing local requirements")
123             os.system("%s install -r %s" % (self.env['PIP_BIN'], self.find_resource('requirements_local.txt')))
124         except ValueError:
125             pass
126
127 class GitSite(DeploySite):
128
129     def update_app(self):
130         self.info("Updating repository.")
131         os.system("cd %s; git pull" % self.env['APP_DIR'])
132
133 class ApacheSite(DeploySite):
134
135     def __init__(self, **env):
136         super(ApacheSite, self).__init__(**env)
137
138         if 'VHOST_SOURCE_FILE' not in self.env:
139             self.env['VHOST_SOURCE_FILE'] = 'apache_vhost.template'
140
141         if 'VHOST_FILE' not in self.env:
142             self.env['VHOST_FILE'] = os.path.join(self.env['CONFIG_DIR'], self.env['PROJECT_NAME'] + '.vhost')
143
144     def update_config(self):
145         source = self.find_resource(self.env['VHOST_SOURCE_FILE'])
146         self.render_template(source, self.env['VHOST_CONFIG_FILE'])