Scripts to download files from google storage based on sha1 sums

third_party/gsutil/boto/pyami/installers/ubuntu/installer.py

+# Copyright (c) 2006,2007,2008 Mitch Garnaat http://garnaat.org/
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish, dis-
+# tribute, sublicense, and/or sell copies of the Software, and to permit
+# persons to whom the Software is furnished to do so, subject to the fol-
+# lowing conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+#
+import boto.pyami.installers
+import os
+import os.path
+import stat
+import boto
+import random
+from pwd import getpwnam
+
+class Installer(boto.pyami.installers.Installer):
+    """
+    Base Installer class for Ubuntu-based AMI's
+    """
+    def add_cron(self, name, command, minute="*", hour="*", mday="*", month="*", wday="*", who="root", env=None):
+        """
+        Write a file to /etc/cron.d to schedule a command
+            env is a dict containing environment variables you want to set in the file
+            name will be used as the name of the file
+        """
+        if minute == 'random':
+            minute = str(random.randrange(60))
+        if hour == 'random':
+            hour = str(random.randrange(24))
+        fp = open('/etc/cron.d/%s' % name, "w")
+        if env:
+            for key, value in env.items():
+                fp.write('%s=%s\n' % (key, value))
+        fp.write('%s %s %s %s %s %s %s\n' % (minute, hour, mday, month, wday, who, command))
+        fp.close()
+
+    def add_init_script(self, file, name):
+        """
+        Add this file to the init.d directory
+        """
+        f_path = os.path.join("/etc/init.d", name)
+        f = open(f_path, "w")
+        f.write(file)
+        f.close()
+        os.chmod(f_path, stat.S_IREAD| stat.S_IWRITE | stat.S_IEXEC)
+        self.run("/usr/sbin/update-rc.d %s defaults" % name)
+
+    def add_env(self, key, value):
+        """
+        Add an environemnt variable
+        For Ubuntu, the best place is /etc/environment.  Values placed here do
+        not need to be exported.
+        """
+        boto.log.info('Adding env variable: %s=%s' % (key, value))
+        if not os.path.exists("/etc/environment.orig"):
+            self.run('cp /etc/environment /etc/environment.orig', notify=False, exit_on_error=False)
+        fp = open('/etc/environment', 'a')
+        fp.write('\n%s="%s"' % (key, value))
+        fp.close()
+        os.environ[key] = value
+
+    def stop(self, service_name):
+        self.run('/etc/init.d/%s stop' % service_name)
+
+    def start(self, service_name):
+        self.run('/etc/init.d/%s start' % service_name)
+
+    def create_user(self, user):
+        """
+        Create a user on the local system
+        """
+        self.run("useradd -m %s" % user)
+        usr =  getpwnam(user)
+        return usr
+
+
+    def install(self):
+        """
+        This is the only method you need to override
+        """
+        raise NotImplementedError
+