Add manifest_check tool

Add a tool that can check that the <uses-library> tags in an
AndroidManifest.xml file match a list provided by the build.

Bug: 132357300
Test: manifest_check_test
Change-Id: If15abf792282bef677469595e80f19923b87ab62

scripts/manifest_fixer.py

@@ -17,30 +17,20 @@
 """A tool for inserting values from the build system into a manifest."""
 
 from __future__ import print_function
+
 import argparse
 import sys
 from xml.dom import minidom
 
 
-android_ns = 'http://schemas.android.com/apk/res/android'
-
-
-def get_children_with_tag(parent, tag_name):
-  children = []
-  for child in  parent.childNodes:
-    if child.nodeType == minidom.Node.ELEMENT_NODE and \
-       child.tagName == tag_name:
-      children.append(child)
-  return children
-
-
-def find_child_with_attribute(element, tag_name, namespace_uri,
-                              attr_name, value):
-  for child in get_children_with_tag(element, tag_name):
-    attr = child.getAttributeNodeNS(namespace_uri, attr_name)
-    if attr is not None and attr.value == value:
-      return child
-  return None
+from manifest import android_ns
+from manifest import compare_version_gt
+from manifest import ensure_manifest_android_ns
+from manifest import find_child_with_attribute
+from manifest import get_children_with_tag
+from manifest import get_indent
+from manifest import parse_manifest
+from manifest import write_xml
 
 
 def parse_args():
@@ -74,76 +64,6 @@ def parse_args():
   return parser.parse_args()
 
 
-def parse_manifest(doc):
-  """Get the manifest element."""
-
-  manifest = doc.documentElement
-  if manifest.tagName != 'manifest':
-    raise RuntimeError('expected manifest tag at root')
-  return manifest
-
-
-def ensure_manifest_android_ns(doc):
-  """Make sure the manifest tag defines the android namespace."""
-
-  manifest = parse_manifest(doc)
-
-  ns = manifest.getAttributeNodeNS(minidom.XMLNS_NAMESPACE, 'android')
-  if ns is None:
-    attr = doc.createAttributeNS(minidom.XMLNS_NAMESPACE, 'xmlns:android')
-    attr.value = android_ns
-    manifest.setAttributeNode(attr)
-  elif ns.value != android_ns:
-    raise RuntimeError('manifest tag has incorrect android namespace ' +
-                       ns.value)
-
-
-def as_int(s):
-  try:
-    i = int(s)
-  except ValueError:
-    return s, False
-  return i, True
-
-
-def compare_version_gt(a, b):
-  """Compare two SDK versions.
-
-  Compares a and b, treating codenames like 'Q' as higher
-  than numerical versions like '28'.
-
-  Returns True if a > b
-
-  Args:
-    a: value to compare
-    b: value to compare
-  Returns:
-    True if a is a higher version than b
-  """
-
-  a, a_is_int = as_int(a.upper())
-  b, b_is_int = as_int(b.upper())
-
-  if a_is_int == b_is_int:
-    # Both are codenames or both are versions, compare directly
-    return a > b
-  else:
-    # One is a codename, the other is not.  Return true if
-    # b is an integer version
-    return b_is_int
-
-
-def get_indent(element, default_level):
-  indent = ''
-  if element is not None and element.nodeType == minidom.Node.TEXT_NODE:
-    text = element.nodeValue
-    indent = text[:len(text)-len(text.lstrip())]
-  if not indent or indent == '\n':
-    # 1 indent = 4 space
-    indent = '\n' + (' ' * default_level * 4)
-  return indent
-
-
 def raise_min_sdk_version(doc, min_sdk_version, target_sdk_version, library):
   """Ensure the manifest contains a <uses-sdk> tag with a minSdkVersion.
 
@@ -151,6 +71,7 @@ def raise_min_sdk_version(doc, min_sdk_version, target_sdk_version, library):
     doc: The XML document.  May be modified by this function.
     min_sdk_version: The requested minSdkVersion attribute.
     target_sdk_version: The requested targetSdkVersion attribute.
+    library: True if the manifest is for a library.
   Raises:
     RuntimeError: invalid manifest
   """
@@ -249,6 +170,7 @@ def add_uses_libraries(doc, new_uses_libraries, required):
     indent = get_indent(application.previousSibling, 1)
     application.appendChild(doc.createTextNode(indent))
 
+
 def add_uses_non_sdk_api(doc):
   """Add android:usesNonSdkApi=true attribute to <application>.
 
@@ -323,12 +245,6 @@ def add_extract_native_libs(doc, extract_native_libs):
                        (attr.value, value))
 
 
-def write_xml(f, doc):
-  f.write('<?xml version="1.0" encoding="utf-8"?>\n')
-  for node in doc.childNodes:
-    f.write(node.toxml(encoding='utf-8') + '\n')
-
-
 def main():
   """Program entry point."""
   try: