1 files changed, 105 insertions, 0 deletions
diff --git a/deps/v8/tools/deprecation_stats.py b/deps/v8/tools/deprecation_stats.py
new file mode 100755
index 0000000000..780832e681
--- /dev/null
+++ b/deps/v8/tools/deprecation_stats.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+# Copyright 2018 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+from datetime import datetime
+import re
+import subprocess
+import sys
+
+RE_GITHASH = re.compile(r"^[0-9a-f]{40}")
+RE_AUTHOR_TIME = re.compile(r"^author-time (\d+)$")
+RE_FILENAME = re.compile(r"^filename (.+)$")
+
+def GetBlame(file_path):
+  result = subprocess.check_output(
+      ['git', 'blame', '-t', '--line-porcelain', file_path])
+  line_iter = iter(result.splitlines())
+  blame_list = list()
+  current_blame = None
+  while True:
+    line = next(line_iter, None)
+    if line is None:
+      break
+    if RE_GITHASH.match(line):
+      if current_blame is not None:
+        blame_list.append(current_blame)
+      current_blame = {'time': 0, 'filename': None, 'content': None}
+      continue
+    match = RE_AUTHOR_TIME.match(line)
+    if match:
+      current_blame['time'] = datetime.fromtimestamp(int(match.groups()[0]))
+      continue
+    match = RE_FILENAME.match(line)
+    if match:
+      current_blame['filename'] = match.groups()[0]
+      current_blame['content'] = next(line_iter).strip()
+      continue
+  blame_list.append(current_blame)
+  return blame_list
+
+RE_MACRO_END = re.compile(r"\);");
+RE_DEPRECATE_MACRO = re.compile(r"\(.*?,(.*)\);", re.MULTILINE)
+
+def FilterAndPrint(blame_list, macro, before):
+  index = 0
+  re_macro = re.compile(macro)
+  deprecated = list()
+  while index < len(blame_list):
+    blame = blame_list[index]
+    match = re_macro.search(blame['content'])
+    if match and blame['time'] < before:
+      line = blame['content']
+      time = blame['time']
+      pos = match.end()
+      start = -1
+      parens = 0
+      quotes = 0
+      while True:
+        if pos >= len(line):
+          # extend to next line
+          index = index + 1
+          blame = blame_list[index]
+          if line.endswith(','):
+            # add whitespace when breaking line due to comma
+            line = line + ' '
+          line = line + blame['content']
+        if line[pos] == '(':
+          parens = parens + 1
+        elif line[pos] == ')':
+          parens = parens - 1
+          if parens == 0:
+            break
+        elif line[pos] == '"':
+          quotes = quotes + 1
+        elif line[pos] == ',' and quotes % 2 == 0 and start == -1:
+          start = pos + 1
+        pos = pos + 1
+      deprecated.append([index + 1, time, line[start:pos].strip()])
+    index = index + 1
+  print("Marked as " + macro + ": " + str(len(deprecated)))
+  for linenumber, time, content in deprecated:
+    print(str(linenumber).rjust(8) + " : " + str(time) + " : " + content)
+  return len(deprecated)
+
+def ParseOptions(args):
+  parser = argparse.ArgumentParser(description="Collect deprecation statistics")
+  parser.add_argument("file_path", help="Path to v8.h")
+  parser.add_argument("--before", help="Filter by date")
+  options = parser.parse_args(args)
+  if options.before:
+    options.before = datetime.strptime(options.before, '%Y-%m-%d')
+  else:
+    options.before = datetime.now()
+  return options
+
+def Main(args):
+  options = ParseOptions(args)
+  blame_list = GetBlame(options.file_path)
+  FilterAndPrint(blame_list, "V8_DEPRECATE_SOON", options.before)
+  FilterAndPrint(blame_list, "V8_DEPRECATED", options.before)
+
+if __name__ == "__main__":
+  Main(sys.argv[1:])