Create mach bootstrap based on Mozilla's mozboot bootstrapper

python/servo/bootstrapper/base.py

@@ -0,0 +1,62 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from __future__ import print_function, unicode_literals
+
+import distutils
+import subprocess
+
+
+class BaseBootstrapper(object):
+    """Base class for system bootstrappers."""
+
+    def __init__(self, interactive=False):
+        self.package_manager_updated = False
+        self.interactive = interactive
+
+    def ensure_system_packages(self):
+        '''
+        Check for missing packages.
+        '''
+        raise NotImplementedError('%s must implement ensure_system_packages()' %
+                                  __name__)
+
+    def install_system_packages(self):
+        '''
+        Install packages required to build Servo.
+        '''
+        raise NotImplementedError('%s must implement install_system_packages()' %
+                                  __name__)
+
+    def install_mobile_android_packages(self):
+        '''
+        Install packages required to build Servo for Android.
+        '''
+        raise NotImplementedError('Cannot bootstrap Servo for Android: '
+                                  '%s does not yet implement install_mobile_android_packages()'
+                                  % __name__)
+
+    def which(self, name):
+        """Python implementation of which.
+
+        It returns the path of an executable or None if it couldn't be found.
+        """
+        return distutils.spawn.find_executable(name)
+
+    def check_output(self, *args, **kwargs):
+        """Run subprocess.check_output."""
+        return subprocess.check_output(*args, **kwargs)
+
+    def _ensure_package_manager_updated(self):
+        if self.package_manager_updated:
+            return
+
+        self._update_package_manager()
+        self.package_manager_updated = True
+
+    def _update_package_manager(self):
+        """Updates the package manager's manifests/package list.
+
+        This should be defined in child classes.
+        """