diff --git a/bash_completion/LICENSE b/bash_completion/LICENSE
new file mode 100644
index 0000000..d251496
--- /dev/null
+++ b/bash_completion/LICENSE
@@ -0,0 +1,27 @@
+// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/bash_completion/repo.bash b/bash_completion/repo.bash
new file mode 100644
index 0000000..500734a
--- /dev/null
+++ b/bash_completion/repo.bash
@@ -0,0 +1,99 @@
+# Copyright (c) 2011 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.
+
+# Programmable completion for some Chromium OS build scripts.
+
+_list_repo_commands() {
+  local repo=${COMP_WORDS[0]}
+  "${repo}" help --all | grep -E '^  ' | sed 's/  \([^ ]\+\) .\+/\1/'
+}
+
+_list_repo_branches() {
+  local repo=${COMP_WORDS[0]}
+  "${repo}" branches 2>&1 | grep \| | sed 's/[ *][Pp ] *\([^ ]\+\) .*/\1/'
+}
+
+_list_repo_projects() {
+  local repo=${COMP_WORDS[0]}
+  local manifest=$(mktemp)
+  "${repo}" manifest -o "${manifest}" >& /dev/null
+  grep 'project name=' "${manifest}" | sed 's/.\+name="\([^"]\+\)".\+/\1/'
+  rm -f "${manifest}" >& /dev/null
+}
+
+# Complete the repo <command> argument.
+_complete_repo_command() {
+  [ ${COMP_CWORD} -eq 1 ] || return 1
+  local command=${COMP_WORDS[1]}
+  COMPREPLY=($(compgen -W "$(_list_repo_commands)" -- "${command}"))
+  return 0
+}
+
+_complete_repo_arg() {
+  [ ${COMP_CWORD} -gt 1 ] || return 1
+  local command=${COMP_WORDS[1]}
+  local current=${COMP_WORDS[COMP_CWORD]}
+  if [[ ${command} == "abandon" ]]; then
+    if [[ ${COMP_CWORD} -eq 2 ]]; then
+      COMPREPLY=($(compgen -W "$(_list_repo_branches)" -- "${current}"))
+    else
+      COMPREPLY=($(compgen -W "$(_list_repo_projects)" -- "${current}"))
+    fi
+    return 0
+  fi
+  if [[ ${command} == "help" ]]; then
+    [ ${COMP_CWORD} -eq 2 ] && \
+      COMPREPLY=($(compgen -W "$(_list_repo_commands)" -- "${current}"))
+    return 0
+  fi
+  if [[ ${command} == "start" ]]; then
+    [ ${COMP_CWORD} -gt 2 ] && \
+      COMPREPLY=($(compgen -W "$(_list_repo_projects)" -- "${current}"))
+    return 0
+  fi
+  return 1
+}
+
+# Complete the repo arguments.
+_complete_repo() {
+  COMPREPLY=()
+  _complete_repo_command && return 0
+  _complete_repo_arg && return 0
+  return 0
+}
+
+complete -F _complete_repo repo
+
+# Add a way to get the "m" branch from repo easily; used by __git_branch_ps1()
+#
+# Repo seems to maintain a phony 'm/' remote and it always seems to be the name
+# of the manifest branch.  This will retrieve it.
+__git_m_branch() {
+  local git_dir=$(git rev-parse --git-dir 2> /dev/null)
+  if [ -n "${git_dir}" ]; then
+    echo $(cd ${git_dir}/refs/remotes/m 2> /dev/null && ls)
+  fi
+}
+
+# A "subclass" of __git_ps1 that adds the manifest branch name into the prompt.
+# ...if you're on manifest branch "0.11.257.B" and local branch "lo" and
+# pass " (%s)", we'll output " (0.11.257.B/lo)".  Note that we'll never show
+# the manifest branch 'master', since it's so common.
+__git_branch_ps1() {
+  local format_str="${1:- (%s)}"
+  local m_branch=$(__git_m_branch)
+  if [ "${m_branch}" != "master" -a -n "${m_branch}" ]; then
+    format_str=$(printf "${format_str}" "${m_branch}/%s")
+  fi
+  # for subshells, prefix the prompt with the shell nesting level
+  local lshlvl=""
+  [ ! -z "${SHLVL##*[!0-9]*}" ] && [ ${SHLVL} -gt 1 ] && lshlvl="${SHLVL} "
+  __git_ps1 "${lshlvl}${format_str}"
+}
+
+# Prompt functions should not error when in subshells
+export -f __gitdir
+export -f __git_ps1
+export -f __git_m_branch
+export -f __git_branch_ps1