1 files changed, 128 insertions, 0 deletions
diff --git a/tools/hook-scripts/verify-po.py b/tools/hook-scripts/verify-po.py
new file mode 100755
index 0000000..b860901
--- /dev/null
+++ b/tools/hook-scripts/verify-po.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python
+#
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+#
+"""This is a pre-commit hook that checks whether the contents of PO files
+committed to the repository are encoded in UTF-8.
+"""
+
+import codecs
+import string
+import sys
+import subprocess
+from svn import core, fs, delta, repos
+
+# Set to the path of the 'msgfmt' executable to use msgfmt to check
+# the syntax of the po file
+
+USE_MSGFMT = None
+
+if USE_MSGFMT is not None:
+  class MsgFmtChecker:
+    def __init__(self):
+      self.pipe = subprocess.Popen([USE_MSGFMT, "-c", "-o", "/dev/null", "-"],
+                                   stdin=subprocess.PIPE,
+                                   close_fds=sys.platform != "win32")
+      self.io_error = 0
+
+    def write(self, data):
+      if self.io_error:
+        return
+      try:
+        self.pipe.stdin.write(data)
+      except IOError:
+        self.io_error = 1
+
+    def close(self):
+      try:
+        self.pipe.stdin.close()
+      except IOError:
+        self.io_error = 1
+      return self.pipe.wait() == 0 and not self.io_error
+else:
+  class MsgFmtChecker:
+    def write(self, data):
+      pass
+    def close(self):
+      return 1
+
+
+class ChangeReceiver(delta.Editor):
+  def __init__(self, txn_root, base_root, pool):
+    self.txn_root = txn_root
+    self.base_root = base_root
+    self.pool = pool
+
+  def add_file(self, path, parent_baton,
+               copyfrom_path, copyfrom_revision, file_pool):
+    return [0, path]
+
+  def open_file(self, path, parent_baton, base_revision, file_pool):
+    return [0, path]
+
+  def apply_textdelta(self, file_baton, base_checksum):
+    file_baton[0] = 1
+    # no handler
+    return None
+
+  def close_file(self, file_baton, text_checksum):
+    changed, path = file_baton
+    if len(path) < 3 or path[-3:] != '.po' or not changed:
+      # This is not a .po file, or it hasn't changed
+      return
+
+    try:
+      # Read the file contents through a validating UTF-8 decoder
+      subpool = core.svn_pool_create(self.pool)
+      checker = MsgFmtChecker()
+      try:
+        stream = core.Stream(fs.file_contents(self.txn_root, path, subpool))
+        reader = codecs.getreader('UTF-8')(stream, 'strict')
+        writer = codecs.getwriter('UTF-8')(checker, 'strict')
+        while True:
+          data = reader.read(core.SVN_STREAM_CHUNK_SIZE)
+          if not data:
+            break
+          writer.write(data)
+        if not checker.close():
+          sys.exit("PO format check failed for '" + path + "'")
+      except UnicodeError:
+        sys.exit("PO file is not in UTF-8: '" + path + "'")
+    finally:
+      core.svn_pool_destroy(subpool)
+
+
+def check_po(pool, repos_path, txn):
+  def authz_cb(root, path, pool):
+    return 1
+
+  fs_ptr = repos.fs(repos.open(repos_path, pool))
+  txn_ptr = fs.open_txn(fs_ptr, txn, pool)
+  txn_root = fs.txn_root(txn_ptr, pool)
+  base_root = fs.revision_root(fs_ptr, fs.txn_base_revision(txn_ptr), pool)
+  editor = ChangeReceiver(txn_root, base_root, pool)
+  e_ptr, e_baton = delta.make_editor(editor, pool)
+  repos.dir_delta(base_root, '', '', txn_root, '',
+		  e_ptr, e_baton, authz_cb, 0, 1, 0, 0, pool)
+
+
+if __name__ == '__main__':
+  assert len(sys.argv) == 3
+  core.run_app(check_po, sys.argv[1], sys.argv[2])