Add a common module library.

server/module_lib/icon_lib.py

@@ -0,0 +1,62 @@
+#!/usr/bin/python3
+
+import os
+import shutil
+import subprocess
+import sys
+
+
+class IconModule(object):
+
+  def __init__(self, chroot_path):
+    self._chroot_path = chroot_path
+
+  def Exec(self, *args, **kwargs):
+    print('+', args)
+    subprocess.check_call(args, **kwargs)
+
+  def ExecChroot(self, *args, **kwargs):
+    self.Exec('chroot', self._chroot_path, *args, **kwargs)
+
+  def CopyRootFSOverlay(self, source_dir):
+    start_pos = len(source_dir) + 1
+    for dirpath, dirnames, filenames in os.walk(source_dir):
+      dest_dir = os.path.join(self._chroot_path, dirpath[start_pos:])
+      # pylint: disable=unexpected-keyword-arg
+      os.makedirs(dest_dir, exist_ok=True)
+      shutil.copystat(dirpath, dest_dir)
+      for dirname in dirnames:
+        source_path = os.path.join(dirpath, dirname)
+        dest_path = os.path.join(dest_dir, dirname)
+        try:
+          link = os.readlink(source_path)
+          os.symlink(link, dest_path)
+        except OSError:
+          pass
+      for filename in filenames:
+        source_path = os.path.join(dirpath, filename)
+        dest_path = os.path.join(dest_dir, filename)
+        try:
+          link = os.readlink(source_path)
+          os.symlink(link, dest_path)
+        except OSError:
+          shutil.copy(source_path, dest_path)
+
+    # In case we copied libraries
+    self.ExecChroot('ldconfig')
+
+  def InstallPackages(self, *packages):
+    self.ExecChroot('apt-get', 'install', '--assume-yes', '--no-install-recommends', *packages)
+
+  def InstallPythonPackages(self, *packages):
+    self.InstallPackages('python-pip')
+    self.ExecChroot('pip', 'install', *packages)
+
+  def AddSystemUsers(self, *users):
+    for user in users:
+      self.ExecChroot('adduser', '--system', '--group', '--no-create-home', '--disabled-login', user)
+
+  def AddKernelModules(self, *modules):
+    with open(os.path.join(self._chroot_path, 'etc', 'modules'), 'a') as fh:
+      for module in modules:
+        fh.write('%s\n' % module)