u_boot_pylib: Move gitutil into the library

Move this file into U-Boot's Python library, so that it is no-longer
part of patman.

This makes a start on:

https://source.denx.de/u-boot/custodians/u-boot-dm/-/issues/35

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/__init__.py b/tools/patman/__init__.py
index 08eeffd..6de0e9f 100644
--- a/tools/patman/__init__.py
+++ b/tools/patman/__init__.py
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0+
 
 __all__ = ['checkpatch', 'commit', 'control', 'func_test', 'get_maintainer',
-           'gitutil', '__main__', 'patchstream', 'project', 'series',
-           'settings','setup', 'status', 'test_checkpatch', 'test_settings']
+           '__main__', 'patchstream', 'project', 'series',
+           'settings', 'setup', 'status', 'test_checkpatch', 'test_settings']
diff --git a/tools/patman/__main__.py b/tools/patman/__main__.py
index f645b38..36f1c08 100755
--- a/tools/patman/__main__.py
+++ b/tools/patman/__main__.py
@@ -49,7 +49,7 @@
         result = test_util.run_test_suites(
             'patman', False, False, False, None, None, None,
             [test_checkpatch.TestPatch, func_test.TestFunctional,
-             'gitutil', 'settings'])
+             'settings'])
 
         sys.exit(0 if result.wasSuccessful() else 1)
 
diff --git a/tools/patman/checkpatch.py b/tools/patman/checkpatch.py
index e03cac1..2975881 100644
--- a/tools/patman/checkpatch.py
+++ b/tools/patman/checkpatch.py
@@ -8,8 +8,8 @@
 import re
 import sys
 
-from patman import gitutil
 from u_boot_pylib import command
+from u_boot_pylib import gitutil
 from u_boot_pylib import terminal
 
 EMACS_PREFIX = r'(?:[0-9]{4}.*\.patch:[0-9]+: )?'
diff --git a/tools/patman/cmdline.py b/tools/patman/cmdline.py
index d6496c0..562bc82 100644
--- a/tools/patman/cmdline.py
+++ b/tools/patman/cmdline.py
@@ -13,8 +13,8 @@
 import pathlib
 import sys
 
-from patman import gitutil
 from patman import project
+from u_boot_pylib import gitutil
 from patman import settings
 
 PATMAN_DIR = pathlib.Path(__file__).parent
diff --git a/tools/patman/control.py b/tools/patman/control.py
index b292da9..fb5a424 100644
--- a/tools/patman/control.py
+++ b/tools/patman/control.py
@@ -12,8 +12,8 @@
 import sys
 
 from patman import checkpatch
-from patman import gitutil
 from patman import patchstream
+from u_boot_pylib import gitutil
 from u_boot_pylib import terminal
 
 
diff --git a/tools/patman/func_test.py b/tools/patman/func_test.py
index af6c025..bf333dc 100644
--- a/tools/patman/func_test.py
+++ b/tools/patman/func_test.py
@@ -18,11 +18,11 @@
 
 from patman.commit import Commit
 from patman import control
-from patman import gitutil
 from patman import patchstream
 from patman.patchstream import PatchStream
 from patman.series import Series
 from patman import settings
+from u_boot_pylib import gitutil
 from u_boot_pylib import terminal
 from u_boot_pylib import tools
 from u_boot_pylib.test_util import capture_sys_output
diff --git a/tools/patman/get_maintainer.py b/tools/patman/get_maintainer.py
index 8df3d12..200ee96 100644
--- a/tools/patman/get_maintainer.py
+++ b/tools/patman/get_maintainer.py
@@ -7,8 +7,8 @@
 import shlex
 import shutil
 
-from patman import gitutil
 from u_boot_pylib import command
+from u_boot_pylib import gitutil
 
 
 def find_get_maintainer(script_file_name):
diff --git a/tools/patman/gitutil.py b/tools/patman/gitutil.py
deleted file mode 100644
index 10ea5ff..0000000
--- a/tools/patman/gitutil.py
+++ /dev/null
@@ -1,706 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0+
-# Copyright (c) 2011 The Chromium OS Authors.
-#
-
-import os
-import sys
-
-from patman import settings
-from u_boot_pylib import command
-from u_boot_pylib import terminal
-
-# True to use --no-decorate - we check this in setup()
-use_no_decorate = True
-
-
-def log_cmd(commit_range, git_dir=None, oneline=False, reverse=False,
-            count=None):
-    """Create a command to perform a 'git log'
-
-    Args:
-        commit_range: Range expression to use for log, None for none
-        git_dir: Path to git repository (None to use default)
-        oneline: True to use --oneline, else False
-        reverse: True to reverse the log (--reverse)
-        count: Number of commits to list, or None for no limit
-    Return:
-        List containing command and arguments to run
-    """
-    cmd = ['git']
-    if git_dir:
-        cmd += ['--git-dir', git_dir]
-    cmd += ['--no-pager', 'log', '--no-color']
-    if oneline:
-        cmd.append('--oneline')
-    if use_no_decorate:
-        cmd.append('--no-decorate')
-    if reverse:
-        cmd.append('--reverse')
-    if count is not None:
-        cmd.append('-n%d' % count)
-    if commit_range:
-        cmd.append(commit_range)
-
-    # Add this in case we have a branch with the same name as a directory.
-    # This avoids messages like this, for example:
-    #   fatal: ambiguous argument 'test': both revision and filename
-    cmd.append('--')
-    return cmd
-
-
-def count_commits_to_branch(branch):
-    """Returns number of commits between HEAD and the tracking branch.
-
-    This looks back to the tracking branch and works out the number of commits
-    since then.
-
-    Args:
-        branch: Branch to count from (None for current branch)
-
-    Return:
-        Number of patches that exist on top of the branch
-    """
-    if branch:
-        us, msg = get_upstream('.git', branch)
-        rev_range = '%s..%s' % (us, branch)
-    else:
-        rev_range = '@{upstream}..'
-    pipe = [log_cmd(rev_range, oneline=True)]
-    result = command.run_pipe(pipe, capture=True, capture_stderr=True,
-                              oneline=True, raise_on_error=False)
-    if result.return_code:
-        raise ValueError('Failed to determine upstream: %s' %
-                         result.stderr.strip())
-    patch_count = len(result.stdout.splitlines())
-    return patch_count
-
-
-def name_revision(commit_hash):
-    """Gets the revision name for a commit
-
-    Args:
-        commit_hash: Commit hash to look up
-
-    Return:
-        Name of revision, if any, else None
-    """
-    pipe = ['git', 'name-rev', commit_hash]
-    stdout = command.run_pipe([pipe], capture=True, oneline=True).stdout
-
-    # We expect a commit, a space, then a revision name
-    name = stdout.split(' ')[1].strip()
-    return name
-
-
-def guess_upstream(git_dir, branch):
-    """Tries to guess the upstream for a branch
-
-    This lists out top commits on a branch and tries to find a suitable
-    upstream. It does this by looking for the first commit where
-    'git name-rev' returns a plain branch name, with no ! or ^ modifiers.
-
-    Args:
-        git_dir: Git directory containing repo
-        branch: Name of branch
-
-    Returns:
-        Tuple:
-            Name of upstream branch (e.g. 'upstream/master') or None if none
-            Warning/error message, or None if none
-    """
-    pipe = [log_cmd(branch, git_dir=git_dir, oneline=True, count=100)]
-    result = command.run_pipe(pipe, capture=True, capture_stderr=True,
-                              raise_on_error=False)
-    if result.return_code:
-        return None, "Branch '%s' not found" % branch
-    for line in result.stdout.splitlines()[1:]:
-        commit_hash = line.split(' ')[0]
-        name = name_revision(commit_hash)
-        if '~' not in name and '^' not in name:
-            if name.startswith('remotes/'):
-                name = name[8:]
-            return name, "Guessing upstream as '%s'" % name
-    return None, "Cannot find a suitable upstream for branch '%s'" % branch
-
-
-def get_upstream(git_dir, branch):
-    """Returns the name of the upstream for a branch
-
-    Args:
-        git_dir: Git directory containing repo
-        branch: Name of branch
-
-    Returns:
-        Tuple:
-            Name of upstream branch (e.g. 'upstream/master') or None if none
-            Warning/error message, or None if none
-    """
-    try:
-        remote = command.output_one_line('git', '--git-dir', git_dir, 'config',
-                                         'branch.%s.remote' % branch)
-        merge = command.output_one_line('git', '--git-dir', git_dir, 'config',
-                                        'branch.%s.merge' % branch)
-    except Exception:
-        upstream, msg = guess_upstream(git_dir, branch)
-        return upstream, msg
-
-    if remote == '.':
-        return merge, None
-    elif remote and merge:
-        # Drop the initial refs/heads from merge
-        leaf = merge.split('/', maxsplit=2)[2:]
-        return '%s/%s' % (remote, '/'.join(leaf)), None
-    else:
-        raise ValueError("Cannot determine upstream branch for branch "
-                         "'%s' remote='%s', merge='%s'"
-                         % (branch, remote, merge))
-
-
-def get_range_in_branch(git_dir, branch, include_upstream=False):
-    """Returns an expression for the commits in the given branch.
-
-    Args:
-        git_dir: Directory containing git repo
-        branch: Name of branch
-    Return:
-        Expression in the form 'upstream..branch' which can be used to
-        access the commits. If the branch does not exist, returns None.
-    """
-    upstream, msg = get_upstream(git_dir, branch)
-    if not upstream:
-        return None, msg
-    rstr = '%s%s..%s' % (upstream, '~' if include_upstream else '', branch)
-    return rstr, msg
-
-
-def count_commits_in_range(git_dir, range_expr):
-    """Returns the number of commits in the given range.
-
-    Args:
-        git_dir: Directory containing git repo
-        range_expr: Range to check
-    Return:
-        Number of patches that exist in the supplied range or None if none
-        were found
-    """
-    pipe = [log_cmd(range_expr, git_dir=git_dir, oneline=True)]
-    result = command.run_pipe(pipe, capture=True, capture_stderr=True,
-                              raise_on_error=False)
-    if result.return_code:
-        return None, "Range '%s' not found or is invalid" % range_expr
-    patch_count = len(result.stdout.splitlines())
-    return patch_count, None
-
-
-def count_commits_in_branch(git_dir, branch, include_upstream=False):
-    """Returns the number of commits in the given branch.
-
-    Args:
-        git_dir: Directory containing git repo
-        branch: Name of branch
-    Return:
-        Number of patches that exist on top of the branch, or None if the
-        branch does not exist.
-    """
-    range_expr, msg = get_range_in_branch(git_dir, branch, include_upstream)
-    if not range_expr:
-        return None, msg
-    return count_commits_in_range(git_dir, range_expr)
-
-
-def count_commits(commit_range):
-    """Returns the number of commits in the given range.
-
-    Args:
-        commit_range: Range of commits to count (e.g. 'HEAD..base')
-    Return:
-        Number of patches that exist on top of the branch
-    """
-    pipe = [log_cmd(commit_range, oneline=True),
-            ['wc', '-l']]
-    stdout = command.run_pipe(pipe, capture=True, oneline=True).stdout
-    patch_count = int(stdout)
-    return patch_count
-
-
-def checkout(commit_hash, git_dir=None, work_tree=None, force=False):
-    """Checkout the selected commit for this build
-
-    Args:
-        commit_hash: Commit hash to check out
-    """
-    pipe = ['git']
-    if git_dir:
-        pipe.extend(['--git-dir', git_dir])
-    if work_tree:
-        pipe.extend(['--work-tree', work_tree])
-    pipe.append('checkout')
-    if force:
-        pipe.append('-f')
-    pipe.append(commit_hash)
-    result = command.run_pipe([pipe], capture=True, raise_on_error=False,
-                              capture_stderr=True)
-    if result.return_code != 0:
-        raise OSError('git checkout (%s): %s' % (pipe, result.stderr))
-
-
-def clone(git_dir, output_dir):
-    """Checkout the selected commit for this build
-
-    Args:
-        commit_hash: Commit hash to check out
-    """
-    pipe = ['git', 'clone', git_dir, '.']
-    result = command.run_pipe([pipe], capture=True, cwd=output_dir,
-                              capture_stderr=True)
-    if result.return_code != 0:
-        raise OSError('git clone: %s' % result.stderr)
-
-
-def fetch(git_dir=None, work_tree=None):
-    """Fetch from the origin repo
-
-    Args:
-        commit_hash: Commit hash to check out
-    """
-    pipe = ['git']
-    if git_dir:
-        pipe.extend(['--git-dir', git_dir])
-    if work_tree:
-        pipe.extend(['--work-tree', work_tree])
-    pipe.append('fetch')
-    result = command.run_pipe([pipe], capture=True, capture_stderr=True)
-    if result.return_code != 0:
-        raise OSError('git fetch: %s' % result.stderr)
-
-
-def check_worktree_is_available(git_dir):
-    """Check if git-worktree functionality is available
-
-    Args:
-        git_dir: The repository to test in
-
-    Returns:
-        True if git-worktree commands will work, False otherwise.
-    """
-    pipe = ['git', '--git-dir', git_dir, 'worktree', 'list']
-    result = command.run_pipe([pipe], capture=True, capture_stderr=True,
-                              raise_on_error=False)
-    return result.return_code == 0
-
-
-def add_worktree(git_dir, output_dir, commit_hash=None):
-    """Create and checkout a new git worktree for this build
-
-    Args:
-        git_dir: The repository to checkout the worktree from
-        output_dir: Path for the new worktree
-        commit_hash: Commit hash to checkout
-    """
-    # We need to pass --detach to avoid creating a new branch
-    pipe = ['git', '--git-dir', git_dir, 'worktree', 'add', '.', '--detach']
-    if commit_hash:
-        pipe.append(commit_hash)
-    result = command.run_pipe([pipe], capture=True, cwd=output_dir,
-                              capture_stderr=True)
-    if result.return_code != 0:
-        raise OSError('git worktree add: %s' % result.stderr)
-
-
-def prune_worktrees(git_dir):
-    """Remove administrative files for deleted worktrees
-
-    Args:
-        git_dir: The repository whose deleted worktrees should be pruned
-    """
-    pipe = ['git', '--git-dir', git_dir, 'worktree', 'prune']
-    result = command.run_pipe([pipe], capture=True, capture_stderr=True)
-    if result.return_code != 0:
-        raise OSError('git worktree prune: %s' % result.stderr)
-
-
-def create_patches(branch, start, count, ignore_binary, series, signoff=True):
-    """Create a series of patches from the top of the current branch.
-
-    The patch files are written to the current directory using
-    git format-patch.
-
-    Args:
-        branch: Branch to create patches from (None for current branch)
-        start: Commit to start from: 0=HEAD, 1=next one, etc.
-        count: number of commits to include
-        ignore_binary: Don't generate patches for binary files
-        series: Series object for this series (set of patches)
-    Return:
-        Filename of cover letter (None if none)
-        List of filenames of patch files
-    """
-    cmd = ['git', 'format-patch', '-M']
-    if signoff:
-        cmd.append('--signoff')
-    if ignore_binary:
-        cmd.append('--no-binary')
-    if series.get('cover'):
-        cmd.append('--cover-letter')
-    prefix = series.GetPatchPrefix()
-    if prefix:
-        cmd += ['--subject-prefix=%s' % prefix]
-    brname = branch or 'HEAD'
-    cmd += ['%s~%d..%s~%d' % (brname, start + count, brname, start)]
-
-    stdout = command.run_list(cmd)
-    files = stdout.splitlines()
-
-    # We have an extra file if there is a cover letter
-    if series.get('cover'):
-        return files[0], files[1:]
-    else:
-        return None, files
-
-
-def build_email_list(in_list, tag=None, alias=None, warn_on_error=True):
-    """Build a list of email addresses based on an input list.
-
-    Takes a list of email addresses and aliases, and turns this into a list
-    of only email address, by resolving any aliases that are present.
-
-    If the tag is given, then each email address is prepended with this
-    tag and a space. If the tag starts with a minus sign (indicating a
-    command line parameter) then the email address is quoted.
-
-    Args:
-        in_list:        List of aliases/email addresses
-        tag:            Text to put before each address
-        alias:          Alias dictionary
-        warn_on_error: True to raise an error when an alias fails to match,
-                False to just print a message.
-
-    Returns:
-        List of email addresses
-
-    >>> alias = {}
-    >>> alias['fred'] = ['f.bloggs@napier.co.nz']
-    >>> alias['john'] = ['j.bloggs@napier.co.nz']
-    >>> alias['mary'] = ['Mary Poppins <m.poppins@cloud.net>']
-    >>> alias['boys'] = ['fred', ' john']
-    >>> alias['all'] = ['fred ', 'john', '   mary   ']
-    >>> build_email_list(['john', 'mary'], None, alias)
-    ['j.bloggs@napier.co.nz', 'Mary Poppins <m.poppins@cloud.net>']
-    >>> build_email_list(['john', 'mary'], '--to', alias)
-    ['--to "j.bloggs@napier.co.nz"', \
-'--to "Mary Poppins <m.poppins@cloud.net>"']
-    >>> build_email_list(['john', 'mary'], 'Cc', alias)
-    ['Cc j.bloggs@napier.co.nz', 'Cc Mary Poppins <m.poppins@cloud.net>']
-    """
-    quote = '"' if tag and tag[0] == '-' else ''
-    raw = []
-    for item in in_list:
-        raw += lookup_email(item, alias, warn_on_error=warn_on_error)
-    result = []
-    for item in raw:
-        if item not in result:
-            result.append(item)
-    if tag:
-        return ['%s %s%s%s' % (tag, quote, email, quote) for email in result]
-    return result
-
-
-def check_suppress_cc_config():
-    """Check if sendemail.suppresscc is configured correctly.
-
-    Returns:
-        True if the option is configured correctly, False otherwise.
-    """
-    suppresscc = command.output_one_line(
-        'git', 'config', 'sendemail.suppresscc', raise_on_error=False)
-
-    # Other settings should be fine.
-    if suppresscc == 'all' or suppresscc == 'cccmd':
-        col = terminal.Color()
-
-        print((col.build(col.RED, "error") +
-               ": git config sendemail.suppresscc set to %s\n"
-               % (suppresscc)) +
-              "  patman needs --cc-cmd to be run to set the cc list.\n" +
-              "  Please run:\n" +
-              "    git config --unset sendemail.suppresscc\n" +
-              "  Or read the man page:\n" +
-              "    git send-email --help\n" +
-              "  and set an option that runs --cc-cmd\n")
-        return False
-
-    return True
-
-
-def email_patches(series, cover_fname, args, dry_run, warn_on_error, cc_fname,
-                  self_only=False, alias=None, in_reply_to=None, thread=False,
-                  smtp_server=None, get_maintainer_script=None):
-    """Email a patch series.
-
-    Args:
-        series: Series object containing destination info
-        cover_fname: filename of cover letter
-        args: list of filenames of patch files
-        dry_run: Just return the command that would be run
-        warn_on_error: True to print a warning when an alias fails to match,
-                False to ignore it.
-        cc_fname: Filename of Cc file for per-commit Cc
-        self_only: True to just email to yourself as a test
-        in_reply_to: If set we'll pass this to git as --in-reply-to.
-            Should be a message ID that this is in reply to.
-        thread: True to add --thread to git send-email (make
-            all patches reply to cover-letter or first patch in series)
-        smtp_server: SMTP server to use to send patches
-        get_maintainer_script: File name of script to get maintainers emails
-
-    Returns:
-        Git command that was/would be run
-
-    # For the duration of this doctest pretend that we ran patman with ./patman
-    >>> _old_argv0 = sys.argv[0]
-    >>> sys.argv[0] = './patman'
-
-    >>> alias = {}
-    >>> alias['fred'] = ['f.bloggs@napier.co.nz']
-    >>> alias['john'] = ['j.bloggs@napier.co.nz']
-    >>> alias['mary'] = ['m.poppins@cloud.net']
-    >>> alias['boys'] = ['fred', ' john']
-    >>> alias['all'] = ['fred ', 'john', '   mary   ']
-    >>> alias[os.getenv('USER')] = ['this-is-me@me.com']
-    >>> series = {}
-    >>> series['to'] = ['fred']
-    >>> series['cc'] = ['mary']
-    >>> email_patches(series, 'cover', ['p1', 'p2'], True, True, 'cc-fname', \
-            False, alias)
-    'git send-email --annotate --to "f.bloggs@napier.co.nz" --cc \
-"m.poppins@cloud.net" --cc-cmd "./patman send --cc-cmd cc-fname" cover p1 p2'
-    >>> email_patches(series, None, ['p1'], True, True, 'cc-fname', False, \
-            alias)
-    'git send-email --annotate --to "f.bloggs@napier.co.nz" --cc \
-"m.poppins@cloud.net" --cc-cmd "./patman send --cc-cmd cc-fname" p1'
-    >>> series['cc'] = ['all']
-    >>> email_patches(series, 'cover', ['p1', 'p2'], True, True, 'cc-fname', \
-            True, alias)
-    'git send-email --annotate --to "this-is-me@me.com" --cc-cmd "./patman \
-send --cc-cmd cc-fname" cover p1 p2'
-    >>> email_patches(series, 'cover', ['p1', 'p2'], True, True, 'cc-fname', \
-            False, alias)
-    'git send-email --annotate --to "f.bloggs@napier.co.nz" --cc \
-"f.bloggs@napier.co.nz" --cc "j.bloggs@napier.co.nz" --cc \
-"m.poppins@cloud.net" --cc-cmd "./patman send --cc-cmd cc-fname" cover p1 p2'
-
-    # Restore argv[0] since we clobbered it.
-    >>> sys.argv[0] = _old_argv0
-    """
-    to = build_email_list(series.get('to'), '--to', alias, warn_on_error)
-    if not to:
-        git_config_to = command.output('git', 'config', 'sendemail.to',
-                                       raise_on_error=False)
-        if not git_config_to:
-            print("No recipient.\n"
-                  "Please add something like this to a commit\n"
-                  "Series-to: Fred Bloggs <f.blogs@napier.co.nz>\n"
-                  "Or do something like this\n"
-                  "git config sendemail.to u-boot@lists.denx.de")
-            return
-    cc = build_email_list(list(set(series.get('cc')) - set(series.get('to'))),
-                          '--cc', alias, warn_on_error)
-    if self_only:
-        to = build_email_list([os.getenv('USER')], '--to',
-                              alias, warn_on_error)
-        cc = []
-    cmd = ['git', 'send-email', '--annotate']
-    if smtp_server:
-        cmd.append('--smtp-server=%s' % smtp_server)
-    if in_reply_to:
-        cmd.append('--in-reply-to="%s"' % in_reply_to)
-    if thread:
-        cmd.append('--thread')
-
-    cmd += to
-    cmd += cc
-    cmd += ['--cc-cmd', '"%s send --cc-cmd %s"' % (sys.argv[0], cc_fname)]
-    if cover_fname:
-        cmd.append(cover_fname)
-    cmd += args
-    cmdstr = ' '.join(cmd)
-    if not dry_run:
-        os.system(cmdstr)
-    return cmdstr
-
-
-def lookup_email(lookup_name, alias=None, warn_on_error=True, level=0):
-    """If an email address is an alias, look it up and return the full name
-
-    TODO: Why not just use git's own alias feature?
-
-    Args:
-        lookup_name: Alias or email address to look up
-        alias: Dictionary containing aliases (None to use settings default)
-        warn_on_error: True to print a warning when an alias fails to match,
-                False to ignore it.
-
-    Returns:
-        tuple:
-            list containing a list of email addresses
-
-    Raises:
-        OSError if a recursive alias reference was found
-        ValueError if an alias was not found
-
-    >>> alias = {}
-    >>> alias['fred'] = ['f.bloggs@napier.co.nz']
-    >>> alias['john'] = ['j.bloggs@napier.co.nz']
-    >>> alias['mary'] = ['m.poppins@cloud.net']
-    >>> alias['boys'] = ['fred', ' john', 'f.bloggs@napier.co.nz']
-    >>> alias['all'] = ['fred ', 'john', '   mary   ']
-    >>> alias['loop'] = ['other', 'john', '   mary   ']
-    >>> alias['other'] = ['loop', 'john', '   mary   ']
-    >>> lookup_email('mary', alias)
-    ['m.poppins@cloud.net']
-    >>> lookup_email('arthur.wellesley@howe.ro.uk', alias)
-    ['arthur.wellesley@howe.ro.uk']
-    >>> lookup_email('boys', alias)
-    ['f.bloggs@napier.co.nz', 'j.bloggs@napier.co.nz']
-    >>> lookup_email('all', alias)
-    ['f.bloggs@napier.co.nz', 'j.bloggs@napier.co.nz', 'm.poppins@cloud.net']
-    >>> lookup_email('odd', alias)
-    Alias 'odd' not found
-    []
-    >>> lookup_email('loop', alias)
-    Traceback (most recent call last):
-    ...
-    OSError: Recursive email alias at 'other'
-    >>> lookup_email('odd', alias, warn_on_error=False)
-    []
-    >>> # In this case the loop part will effectively be ignored.
-    >>> lookup_email('loop', alias, warn_on_error=False)
-    Recursive email alias at 'other'
-    Recursive email alias at 'john'
-    Recursive email alias at 'mary'
-    ['j.bloggs@napier.co.nz', 'm.poppins@cloud.net']
-    """
-    if not alias:
-        alias = settings.alias
-    lookup_name = lookup_name.strip()
-    if '@' in lookup_name:      # Perhaps a real email address
-        return [lookup_name]
-
-    lookup_name = lookup_name.lower()
-    col = terminal.Color()
-
-    out_list = []
-    if level > 10:
-        msg = "Recursive email alias at '%s'" % lookup_name
-        if warn_on_error:
-            raise OSError(msg)
-        else:
-            print(col.build(col.RED, msg))
-            return out_list
-
-    if lookup_name:
-        if lookup_name not in alias:
-            msg = "Alias '%s' not found" % lookup_name
-            if warn_on_error:
-                print(col.build(col.RED, msg))
-            return out_list
-        for item in alias[lookup_name]:
-            todo = lookup_email(item, alias, warn_on_error, level + 1)
-            for new_item in todo:
-                if new_item not in out_list:
-                    out_list.append(new_item)
-
-    return out_list
-
-
-def get_top_level():
-    """Return name of top-level directory for this git repo.
-
-    Returns:
-        Full path to git top-level directory
-
-    This test makes sure that we are running tests in the right subdir
-
-    >>> os.path.realpath(os.path.dirname(__file__)) == \
-            os.path.join(get_top_level(), 'tools', 'patman')
-    True
-    """
-    return command.output_one_line('git', 'rev-parse', '--show-toplevel')
-
-
-def get_alias_file():
-    """Gets the name of the git alias file.
-
-    Returns:
-        Filename of git alias file, or None if none
-    """
-    fname = command.output_one_line('git', 'config', 'sendemail.aliasesfile',
-                                    raise_on_error=False)
-    if not fname:
-        return None
-
-    fname = os.path.expanduser(fname.strip())
-    if os.path.isabs(fname):
-        return fname
-
-    return os.path.join(get_top_level(), fname)
-
-
-def get_default_user_name():
-    """Gets the user.name from .gitconfig file.
-
-    Returns:
-        User name found in .gitconfig file, or None if none
-    """
-    uname = command.output_one_line('git', 'config', '--global', '--includes', 'user.name')
-    return uname
-
-
-def get_default_user_email():
-    """Gets the user.email from the global .gitconfig file.
-
-    Returns:
-        User's email found in .gitconfig file, or None if none
-    """
-    uemail = command.output_one_line('git', 'config', '--global', '--includes', 'user.email')
-    return uemail
-
-
-def get_default_subject_prefix():
-    """Gets the format.subjectprefix from local .git/config file.
-
-    Returns:
-        Subject prefix found in local .git/config file, or None if none
-    """
-    sub_prefix = command.output_one_line(
-        'git', 'config', 'format.subjectprefix', raise_on_error=False)
-
-    return sub_prefix
-
-
-def setup():
-    """Set up git utils, by reading the alias files."""
-    # Check for a git alias file also
-    global use_no_decorate
-
-    alias_fname = get_alias_file()
-    if alias_fname:
-        settings.ReadGitAliases(alias_fname)
-    cmd = log_cmd(None, count=0)
-    use_no_decorate = (command.run_pipe([cmd], raise_on_error=False)
-                       .return_code == 0)
-
-
-def get_head():
-    """Get the hash of the current HEAD
-
-    Returns:
-        Hash of HEAD
-    """
-    return command.output_one_line('git', 'show', '-s', '--pretty=format:%H')
-
-
-if __name__ == "__main__":
-    import doctest
-
-    doctest.testmod()
diff --git a/tools/patman/patchstream.py b/tools/patman/patchstream.py
index 4955f6a..08795c4 100644
--- a/tools/patman/patchstream.py
+++ b/tools/patman/patchstream.py
@@ -15,9 +15,9 @@
 import tempfile
 
 from patman import commit
-from patman import gitutil
 from patman.series import Series
 from u_boot_pylib import command
+from u_boot_pylib import gitutil
 
 # Tags that we detect and remove
 RE_REMOVE = re.compile(r'^BUG=|^TEST=|^BRANCH=|^Review URL:'
diff --git a/tools/patman/project.py b/tools/patman/project.py
index 4459042..d6143a6 100644
--- a/tools/patman/project.py
+++ b/tools/patman/project.py
@@ -4,7 +4,7 @@
 
 import os.path
 
-from patman import gitutil
+from u_boot_pylib import gitutil
 
 def detect_project():
     """Autodetect the name of the current project.
diff --git a/tools/patman/series.py b/tools/patman/series.py
index 6866e1d..d7f2f01 100644
--- a/tools/patman/series.py
+++ b/tools/patman/series.py
@@ -12,8 +12,8 @@
 import time
 
 from patman import get_maintainer
-from patman import gitutil
 from patman import settings
+from u_boot_pylib import gitutil
 from u_boot_pylib import terminal
 from u_boot_pylib import tools
 
diff --git a/tools/patman/settings.py b/tools/patman/settings.py
index 68c93e3..d66b22b 100644
--- a/tools/patman/settings.py
+++ b/tools/patman/settings.py
@@ -12,7 +12,7 @@
 import os
 import re
 
-from patman import gitutil
+from u_boot_pylib import gitutil
 
 """Default settings per-project.
 
diff --git a/tools/patman/test_checkpatch.py b/tools/patman/test_checkpatch.py
index db7860f..11d003b 100644
--- a/tools/patman/test_checkpatch.py
+++ b/tools/patman/test_checkpatch.py
@@ -11,10 +11,10 @@
 import unittest
 
 from patman import checkpatch
-from patman import gitutil
 from patman import patchstream
 from patman import series
 from patman import commit
+from u_boot_pylib import gitutil
 
 
 class Line: