toolchain-utils: migrate all in-use projects to python 3

This patch migrates all in-use projects left to python 3.

BUG=chromium:1011676
TEST=Passed unittests and launched scripts manually.

Change-Id: I7f2de4e1131c05bacfac80667f3064da8adaebfd
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2051397
Reviewed-by: George Burgess <gbiv@chromium.org>
Tested-by: Zhizhou Yang <zhizhouy@google.com>
Auto-Submit: Zhizhou Yang <zhizhouy@google.com>

1 files changed, 48 insertions, 38 deletions

diff --git a/debug_info_test/debug_info_test.py b/debug_info_test/debug_info_test.py
index 4839e69c..ae7e9f48 100755
--- a/debug_info_test/debug_info_test.py
+++ b/debug_info_test/debug_info_test.py
@@ -1,9 +1,13 @@
-#!/usr/bin/python2
-
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
 # Copyright 2018 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+"""Test for debug info."""
+
+from __future__ import print_function
+
 import os
 import subprocess
 import sys
@@ -12,46 +16,52 @@ import check_icf
 import check_cus
 import check_exist
 
-elf_checks = [check_exist.check_exist_all,
-              check_cus.check_compile_units,
-              check_icf.check_identical_code_folding]
+elf_checks = [
+    check_exist.check_exist_all, check_cus.check_compile_units,
+    check_icf.check_identical_code_folding
+]
+
 
 def scanelf(root):
-    """find ELFs in root
+  """Find ELFs in root.
+
+  Args:
+    root: root dir to start with the search.
+
+  Returns:
+    Filenames of ELFs in root.
+  """
+  p = subprocess.Popen(['scanelf', '-y', '-B', '-F', '%F', '-R', root],
+                       stdout=subprocess.PIPE,
+                       encoding='utf-8')
+  return [l.strip() for l in p.stdout]
 
-    Args:
-        root: root dir to start with the search.
-    Returns:
-        Filenames of ELFs in root.
-    """
-    p = subprocess.Popen(['scanelf', '-y', '-B', '-F', '%F', '-R', root],
-                         stdout=subprocess.PIPE)
-    return [l.strip() for l in p.stdout]
 
 def Main(argv):
-    if len(argv) < 2:
-        print('usage: %s [file|dir]')
-        return 1
-
-    files = []
-    cand = argv[1]
-    if os.path.isfile(cand):
-        files = [cand]
-    elif os.path.isdir(cand):
-        files = scanelf(cand)
-    else:
-        print('usage: %s [file|dir]')
-        return 1
-
-    failed = False
-    for f in files:
-        for c in elf_checks:
-            if not c(f):
-                failed = True
-
-    if failed:
-        return 1
-    return 0
+  if len(argv) < 2:
+    print('usage: %s [file|dir]')
+    return 1
+
+  files = []
+  cand = argv[1]
+  if os.path.isfile(cand):
+    files = [cand]
+  elif os.path.isdir(cand):
+    files = scanelf(cand)
+  else:
+    print('usage: %s [file|dir]')
+    return 1
+
+  failed = False
+  for f in files:
+    for c in elf_checks:
+      if not c(f):
+        failed = True
+
+  if failed:
+    return 1
+  return 0
+
 
 if __name__ == '__main__':
-    sys.exit(Main(sys.argv))
+  sys.exit(Main(sys.argv))