switch to 4 space indent

Leave the recipes/ code at 2 space to match the rest of the recipes
project in other repos.

Reformatted using:
files=( $(
	git ls-tree -r --name-only HEAD | \
		grep -Ev -e '^(third_party|recipes)/' | \
		grep '\.py$';
	git grep -l '#!/usr/bin/env.*python' | grep -v '\.py$'
) )
parallel ./yapf -i -- "${files[@]}"
~/chromiumos/chromite/contrib/reflow_overlong_comments "${files[@]}"

The files that still had strings that were too long were manually
reformatted because they were easy and only a few issues.
autoninja.py
clang_format.py
download_from_google_storage.py
fix_encoding.py
gclient_utils.py
git_cache.py
git_common.py
git_map_branches.py
git_reparent_branch.py
gn.py
my_activity.py
owners_finder.py
presubmit_canned_checks.py
reclient_helper.py
reclientreport.py
roll_dep.py
rustfmt.py
siso.py
split_cl.py
subcommand.py
subprocess2.py
swift_format.py
upload_to_google_storage.py

These files still had lines (strings) that were too long, so the pylint
warnings were suppressed with a TODO.
auth.py
gclient.py
gclient_eval.py
gclient_paths.py
gclient_scm.py
gerrit_util.py
git_cl.py
presubmit_canned_checks.py
presubmit_support.py
scm.py

Change-Id: Ia6535c4f2c48d46b589ec1e791dde6c6b2ea858f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4836379
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
diff --git a/git_number.py b/git_number.py
index 864f3ee..beae4ac 100755
--- a/git_number.py
+++ b/git_number.py
@@ -2,7 +2,6 @@
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
-
 """Usage: %prog [options] [<commitref>]*
 
 If no <commitref>'s are supplied, it defaults to HEAD.
@@ -51,18 +50,18 @@
 
 
 def pathlify(hash_prefix):
-  """Converts a binary object hash prefix into a posix path, one folder per
+    """Converts a binary object hash prefix into a posix path, one folder per
   byte.
 
   >>> pathlify('\xDE\xAD')
   'de/ad'
   """
-  return '/'.join('%02x' % b for b in hash_prefix)
+    return '/'.join('%02x' % b for b in hash_prefix)
 
 
 @git.memoize_one(threadsafe=False)
 def get_number_tree(prefix_bytes):
-  """Returns a dictionary of the git-number registry specified by
+    """Returns a dictionary of the git-number registry specified by
   |prefix_bytes|.
 
   This is in the form of {<full binary ref>: <gen num> ...}
@@ -70,36 +69,37 @@
   >>> get_number_tree('\x83\xb4')
   {'\x83\xb4\xe3\xe4W\xf9J*\x8f/c\x16\xecD\xd1\x04\x8b\xa9qz': 169, ...}
   """
-  ref = '%s:%s' % (REF, pathlify(prefix_bytes))
+    ref = '%s:%s' % (REF, pathlify(prefix_bytes))
 
-  try:
-    raw = git.run('cat-file', 'blob', ref, autostrip=False, decode=False)
-    return dict(struct.unpack_from(CHUNK_FMT, raw, i * CHUNK_SIZE)
-                for i in range(len(raw) // CHUNK_SIZE))
-  except subprocess2.CalledProcessError:
-    return {}
+    try:
+        raw = git.run('cat-file', 'blob', ref, autostrip=False, decode=False)
+        return dict(
+            struct.unpack_from(CHUNK_FMT, raw, i * CHUNK_SIZE)
+            for i in range(len(raw) // CHUNK_SIZE))
+    except subprocess2.CalledProcessError:
+        return {}
 
 
 @git.memoize_one(threadsafe=False)
 def get_num(commit_hash):
-  """Returns the generation number for a commit.
+    """Returns the generation number for a commit.
 
   Returns None if the generation number for this commit hasn't been calculated
   yet (see load_generation_numbers()).
   """
-  return get_number_tree(commit_hash[:PREFIX_LEN]).get(commit_hash)
+    return get_number_tree(commit_hash[:PREFIX_LEN]).get(commit_hash)
 
 
 def clear_caches(on_disk=False):
-  """Clears in-process caches for e.g. unit testing."""
-  get_number_tree.clear()
-  get_num.clear()
-  if on_disk:
-    git.run('update-ref', '-d', REF)
+    """Clears in-process caches for e.g. unit testing."""
+    get_number_tree.clear()
+    get_num.clear()
+    if on_disk:
+        git.run('update-ref', '-d', REF)
 
 
 def intern_number_tree(tree):
-  """Transforms a number tree (in the form returned by |get_number_tree|) into
+    """Transforms a number tree (in the form returned by |get_number_tree|) into
   a git blob.
 
   Returns the git blob id as hex-encoded string.
@@ -108,88 +108,95 @@
   >>> intern_number_tree(d)
   'c552317aa95ca8c3f6aae3357a4be299fbcb25ce'
   """
-  with tempfile.TemporaryFile() as f:
-    for k, v in sorted(tree.items()):
-      f.write(struct.pack(CHUNK_FMT, k, v))
-    f.seek(0)
-    return git.intern_f(f)
+    with tempfile.TemporaryFile() as f:
+        for k, v in sorted(tree.items()):
+            f.write(struct.pack(CHUNK_FMT, k, v))
+        f.seek(0)
+        return git.intern_f(f)
 
 
 def leaf_map_fn(pre_tree):
-  """Converts a prefix and number tree into a git index line."""
-  pre, tree = pre_tree
-  return '100644 blob %s\t%s\0' % (intern_number_tree(tree), pathlify(pre))
+    """Converts a prefix and number tree into a git index line."""
+    pre, tree = pre_tree
+    return '100644 blob %s\t%s\0' % (intern_number_tree(tree), pathlify(pre))
 
 
 def finalize(targets):
-  """Saves all cache data to the git repository.
+    """Saves all cache data to the git repository.
 
   After calculating the generation number for |targets|, call finalize() to
   save all the work to the git repository.
 
   This in particular saves the trees referred to by DIRTY_TREES.
   """
-  if not DIRTY_TREES:
-    return
+    if not DIRTY_TREES:
+        return
 
-  msg = 'git-number Added %s numbers' % sum(DIRTY_TREES.values())
+    msg = 'git-number Added %s numbers' % sum(DIRTY_TREES.values())
 
-  idx = os.path.join(git.run('rev-parse', '--git-dir'), 'number.idx')
-  env = os.environ.copy()
-  env['GIT_INDEX_FILE'] = str(idx)
+    idx = os.path.join(git.run('rev-parse', '--git-dir'), 'number.idx')
+    env = os.environ.copy()
+    env['GIT_INDEX_FILE'] = str(idx)
 
-  progress_message = 'Finalizing: (%%(count)d/%d)' % len(DIRTY_TREES)
-  with git.ProgressPrinter(progress_message) as inc:
-    git.run('read-tree', REF, env=env)
+    progress_message = 'Finalizing: (%%(count)d/%d)' % len(DIRTY_TREES)
+    with git.ProgressPrinter(progress_message) as inc:
+        git.run('read-tree', REF, env=env)
 
-    prefixes_trees = ((p, get_number_tree(p)) for p in sorted(DIRTY_TREES))
-    updater = subprocess2.Popen(['git', 'update-index', '-z', '--index-info'],
-                                stdin=subprocess2.PIPE, env=env)
+        prefixes_trees = ((p, get_number_tree(p)) for p in sorted(DIRTY_TREES))
+        updater = subprocess2.Popen(
+            ['git', 'update-index', '-z', '--index-info'],
+            stdin=subprocess2.PIPE,
+            env=env)
 
-    with git.ScopedPool(kind=POOL_KIND) as leaf_pool:
-      for item in leaf_pool.imap(leaf_map_fn, prefixes_trees):
-        updater.stdin.write(item.encode())
-        inc()
+        with git.ScopedPool(kind=POOL_KIND) as leaf_pool:
+            for item in leaf_pool.imap(leaf_map_fn, prefixes_trees):
+                updater.stdin.write(item.encode())
+                inc()
 
-    updater.stdin.close()
-    updater.wait()
-    assert updater.returncode == 0
+        updater.stdin.close()
+        updater.wait()
+        assert updater.returncode == 0
 
-    tree_id = git.run('write-tree', env=env)
-    commit_cmd = [
-        # Git user.name and/or user.email may not be configured, so specifying
-        # them explicitly. They are not used, but required by Git.
-        '-c', 'user.name=%s' % AUTHOR_NAME,
-        '-c', 'user.email=%s' % AUTHOR_EMAIL,
-        'commit-tree',
-        '-m', msg,
-        '-p'] + git.hash_multi(REF)
-    for t in targets:
-      commit_cmd.extend(['-p', binascii.hexlify(t).decode()])
-    commit_cmd.append(tree_id)
-    commit_hash = git.run(*commit_cmd)
-    git.run('update-ref', REF, commit_hash)
-  DIRTY_TREES.clear()
+        tree_id = git.run('write-tree', env=env)
+        commit_cmd = [
+            # Git user.name and/or user.email may not be configured, so
+            # specifying them explicitly. They are not used, but required by
+            # Git.
+            '-c',
+            'user.name=%s' % AUTHOR_NAME,
+            '-c',
+            'user.email=%s' % AUTHOR_EMAIL,
+            'commit-tree',
+            '-m',
+            msg,
+            '-p'
+        ] + git.hash_multi(REF)
+        for t in targets:
+            commit_cmd.extend(['-p', binascii.hexlify(t).decode()])
+        commit_cmd.append(tree_id)
+        commit_hash = git.run(*commit_cmd)
+        git.run('update-ref', REF, commit_hash)
+    DIRTY_TREES.clear()
 
 
 def preload_tree(prefix):
-  """Returns the prefix and parsed tree object for the specified prefix."""
-  return prefix, get_number_tree(prefix)
+    """Returns the prefix and parsed tree object for the specified prefix."""
+    return prefix, get_number_tree(prefix)
 
 
 def all_prefixes(depth=PREFIX_LEN):
-  prefixes = [bytes([i]) for i in range(255)]
-  for x in prefixes:
-    # This isn't covered because PREFIX_LEN currently == 1
-    if depth > 1:  # pragma: no cover
-      for r in all_prefixes(depth - 1):
-        yield x + r
-    else:
-      yield x
+    prefixes = [bytes([i]) for i in range(255)]
+    for x in prefixes:
+        # This isn't covered because PREFIX_LEN currently == 1
+        if depth > 1:  # pragma: no cover
+            for r in all_prefixes(depth - 1):
+                yield x + r
+        else:
+            yield x
 
 
 def load_generation_numbers(targets):
-  """Populates the caches of get_num and get_number_tree so they contain
+    """Populates the caches of get_num and get_number_tree so they contain
   the results for |targets|.
 
   Loads cached numbers from disk, and calculates missing numbers if one or
@@ -198,95 +205,109 @@
   Args:
     targets - An iterable of binary-encoded full git commit hashes.
   """
-  # In case they pass us a generator, listify targets.
-  targets = list(targets)
+    # In case they pass us a generator, listify targets.
+    targets = list(targets)
 
-  if all(get_num(t) is not None for t in targets):
-    return
+    if all(get_num(t) is not None for t in targets):
+        return
 
-  if git.tree(REF) is None:
-    empty = git.mktree({})
-    commit_hash = git.run(
-        # Git user.name and/or user.email may not be configured, so specifying
-        # them explicitly. They are not used, but required by Git.
-        '-c', 'user.name=%s' % AUTHOR_NAME,
-        '-c', 'user.email=%s' % AUTHOR_EMAIL,
-        'commit-tree',
-        '-m', 'Initial commit from git-number',
-        empty)
-    git.run('update-ref', REF, commit_hash)
+    if git.tree(REF) is None:
+        empty = git.mktree({})
+        commit_hash = git.run(
+            # Git user.name and/or user.email may not be configured, so
+            # specifying them explicitly. They are not used, but required by
+            # Git.
+            '-c',
+            'user.name=%s' % AUTHOR_NAME,
+            '-c',
+            'user.email=%s' % AUTHOR_EMAIL,
+            'commit-tree',
+            '-m',
+            'Initial commit from git-number',
+            empty)
+        git.run('update-ref', REF, commit_hash)
 
-  with git.ScopedPool(kind=POOL_KIND) as pool:
-    preload_iter = pool.imap_unordered(preload_tree, all_prefixes())
+    with git.ScopedPool(kind=POOL_KIND) as pool:
+        preload_iter = pool.imap_unordered(preload_tree, all_prefixes())
 
-    rev_list = []
+        rev_list = []
 
-    with git.ProgressPrinter('Loading commits: %(count)d') as inc:
-      # Curiously, buffering the list into memory seems to be the fastest
-      # approach in python (as opposed to iterating over the lines in the
-      # stdout as they're produced). GIL strikes again :/
-      cmd = [
-        'rev-list', '--topo-order', '--parents', '--reverse', '^' + REF,
-      ] + [binascii.hexlify(target).decode() for target in targets]
-      for line in git.run(*cmd).splitlines():
-        tokens = [binascii.unhexlify(token) for token in line.split()]
-        rev_list.append((tokens[0], tokens[1:]))
-        inc()
+        with git.ProgressPrinter('Loading commits: %(count)d') as inc:
+            # Curiously, buffering the list into memory seems to be the fastest
+            # approach in python (as opposed to iterating over the lines in the
+            # stdout as they're produced). GIL strikes again :/
+            cmd = [
+                'rev-list',
+                '--topo-order',
+                '--parents',
+                '--reverse',
+                '^' + REF,
+            ] + [binascii.hexlify(target).decode() for target in targets]
+            for line in git.run(*cmd).splitlines():
+                tokens = [binascii.unhexlify(token) for token in line.split()]
+                rev_list.append((tokens[0], tokens[1:]))
+                inc()
 
-    get_number_tree.update(preload_iter)
+        get_number_tree.update(preload_iter)
 
-  with git.ProgressPrinter('Counting: %%(count)d/%d' % len(rev_list)) as inc:
-    for commit_hash, pars in rev_list:
-      num = max(map(get_num, pars)) + 1 if pars else 0
+    with git.ProgressPrinter('Counting: %%(count)d/%d' % len(rev_list)) as inc:
+        for commit_hash, pars in rev_list:
+            num = max(map(get_num, pars)) + 1 if pars else 0
 
-      prefix = commit_hash[:PREFIX_LEN]
-      get_number_tree(prefix)[commit_hash] = num
-      DIRTY_TREES[prefix] += 1
-      get_num.set(commit_hash, num)
+            prefix = commit_hash[:PREFIX_LEN]
+            get_number_tree(prefix)[commit_hash] = num
+            DIRTY_TREES[prefix] += 1
+            get_num.set(commit_hash, num)
 
-      inc()
+            inc()
 
 
 def main():  # pragma: no cover
-  parser = optparse.OptionParser(usage=sys.modules[__name__].__doc__)
-  parser.add_option('--no-cache', action='store_true',
-                    help='Do not actually cache anything we calculate.')
-  parser.add_option('--reset', action='store_true',
-                    help='Reset the generation number cache and quit.')
-  parser.add_option('-v', '--verbose', action='count', default=0,
-                    help='Be verbose. Use more times for more verbosity.')
-  opts, args = parser.parse_args()
+    parser = optparse.OptionParser(usage=sys.modules[__name__].__doc__)
+    parser.add_option('--no-cache',
+                      action='store_true',
+                      help='Do not actually cache anything we calculate.')
+    parser.add_option('--reset',
+                      action='store_true',
+                      help='Reset the generation number cache and quit.')
+    parser.add_option('-v',
+                      '--verbose',
+                      action='count',
+                      default=0,
+                      help='Be verbose. Use more times for more verbosity.')
+    opts, args = parser.parse_args()
 
-  levels = [logging.ERROR, logging.INFO, logging.DEBUG]
-  logging.basicConfig(level=levels[min(opts.verbose, len(levels) - 1)])
+    levels = [logging.ERROR, logging.INFO, logging.DEBUG]
+    logging.basicConfig(level=levels[min(opts.verbose, len(levels) - 1)])
 
-  # 'git number' should only be used on bots.
-  if os.getenv('CHROME_HEADLESS') != '1':
-    logging.error("'git-number' is an infrastructure tool that is only "
-                  "intended to be used internally by bots. Developers should "
-                  "use the 'Cr-Commit-Position' value in the commit's message.")
-    return 1
+    # 'git number' should only be used on bots.
+    if os.getenv('CHROME_HEADLESS') != '1':
+        logging.error(
+            "'git-number' is an infrastructure tool that is only "
+            "intended to be used internally by bots. Developers should "
+            "use the 'Cr-Commit-Position' value in the commit's message.")
+        return 1
 
-  if opts.reset:
-    clear_caches(on_disk=True)
-    return
+    if opts.reset:
+        clear_caches(on_disk=True)
+        return
 
-  try:
-    targets = git.parse_commitrefs(*(args or ['HEAD']))
-  except git.BadCommitRefException as e:
-    parser.error(e)
+    try:
+        targets = git.parse_commitrefs(*(args or ['HEAD']))
+    except git.BadCommitRefException as e:
+        parser.error(e)
 
-  load_generation_numbers(targets)
-  if not opts.no_cache:
-    finalize(targets)
+    load_generation_numbers(targets)
+    if not opts.no_cache:
+        finalize(targets)
 
-  print('\n'.join(map(str, map(get_num, targets))))
-  return 0
+    print('\n'.join(map(str, map(get_num, targets))))
+    return 0
 
 
 if __name__ == '__main__':  # pragma: no cover
-  try:
-    sys.exit(main())
-  except KeyboardInterrupt:
-    sys.stderr.write('interrupted\n')
-    sys.exit(1)
+    try:
+        sys.exit(main())
+    except KeyboardInterrupt:
+        sys.stderr.write('interrupted\n')
+        sys.exit(1)