diff --git a/gitup.py b/gitup.py
new file mode 100644
index 0000000..655f7dd
--- /dev/null
+++ b/gitup.py
@@ -0,0 +1,309 @@
+#! /usr/bin/python
+# -*- coding: utf-8 -*-
+
+"""
+gitup: the git repository updater
+"""
+
+import argparse
+import ConfigParser as configparser
+import os
+import re
+import shlex
+import subprocess
+
+__author__ = "Ben Kurtovic"
+__copyright__ = "Copyright (c) 2011 by Ben Kurtovic"
+__license__ = "MIT License"
+__version__ = "0.1"
+__email__ = "ben.kurtovic@verizon.net"
+
+config_filename = os.path.join(os.path.expanduser("~"), ".gitup")
+
+ansi = { # ANSI escape codes to make terminal output colorful
+    "reset": "\x1b[0m",
+    "bold": "\x1b[1m",
+    "red": "\x1b[1m\x1b[31m",
+    "green": "\x1b[1m\x1b[32m",
+    "yellow": "\x1b[1m\x1b[33m",
+    "blue": "\x1b[1m\x1b[34m",
+}
+
+def out(indent, msg):
+    """Print a message at a given indentation level."""
+    width = 4 # amount to indent at each level
+    if indent == 0:
+        spacing = "\n"
+    else:
+        spacing = " " * width * indent
+    msg = re.sub("\s+", " ", msg) # collapse multiple spaces into one
+    print spacing + msg
+
+def exec_shell(command):
+    """Execute a shell command and get the output."""
+    command = shlex.split(command)
+    result = subprocess.check_output(command, stderr=subprocess.STDOUT)
+    if result:
+        result = result[:-1] # strip newline if command returned anything
+    return result
+
+def directory_is_git_repo(directory_path):
+    """Check if a directory is a git repository."""
+    if os.path.isdir(directory_path):
+        git_subfolder = os.path.join(directory_path, ".git")
+        if os.path.isdir(git_subfolder): # check for path/to/repository/.git
+            return True
+    return False
+
+def get_tail_name(path):
+    """Return the name of the right-most directory in a path. Uses
+    os.path.split, but corrects for an error when the path ends with a /."""
+    if path.endswith("/"):
+        return os.path.split(path[:-1])[1]
+    return os.path.split(path)[1]
+
+def update_repository(repo_path, repo_name):
+    """Update a single git project by pulling from the remote repository."""
+    out(1, "{}{}{}:".format(ansi['bold'], repo_name, ansi['reset']))
+    
+    os.chdir(repo_path) # cd into the project folder so git commands target the
+                        # correct repo
+    
+    try:
+        dry_fetch = exec_shell("git fetch --dry-run") # check if there is
+                                                      # anything to pull, but
+                                                      # don't do it yet
+    except subprocess.CalledProcessError:
+        out(2, """{}Error:{} cannot fetch; do you have a remote repository
+                configured correctly?""".format(ansi['red'], ansi['reset']))
+        return
+    
+    try:
+        last = exec_shell("git log -n 1 --pretty=\"%ar\"") # last commit time
+    except subprocess.CalledProcessError:
+        last = "never" # couldn't get a log, so no commits
+    
+    if not dry_fetch: # no new changes to pull
+        out(2, "{}No new changes.{} Last commit was {}.".format(ansi['blue'],
+                ansi['reset'], last))
+        
+    else: # stuff has happened!
+        out(2, "There are new changes upstream...")
+        status = exec_shell("git status")
+    
+        if status.endswith("nothing to commit (working directory clean)"):
+            out(2, "{}Pulling new changes...{}".format(ansi['green'],
+                    ansi['reset']))
+            result = exec_shell("git pull")
+            out(2, "The following changes have been made since {}:".format(
+                    last))
+            print result
+        
+        else:
+            out(2, """{}Warning:{} You have uncommitted changes in this
+                    project!""".format(ansi['red'], ansi['reset']))
+            out(2, "Ignoring.")
+
+def update_directory(dir_path, dir_name, is_bookmark=False):
+    """First, make sure the specified object is actually a directory, then
+    determine whether the directory is a git project on its own or a directory
+    of git projects. If the former, update the single repository; if the
+    latter, update all repositories contained within."""
+    if is_bookmark:
+        dir_source = "Bookmark" # where did we get this directory from?
+    else:
+        dir_source = "Directory"
+    
+    try:
+        os.listdir(dir_path) # test if we can access this directory
+    except OSError:
+        out(0, "{}Error:{} cannot enter {} '{}{}{}'; does it exist?".format(
+        ansi['red'], ansi['reset'], dir_source.lower(), ansi['bold'], dir_path,
+        ansi['reset']))
+        return
+    
+    if not os.path.isdir(dir_path):
+        if os.path.exists(dir_path):
+            error_message = "is not a directory"
+        else:
+            error_message = "does not exist"
+            
+        out(0, "{}Error{}: {} '{}{}{}' {}!".format(ansi['red'], ansi['reset'],
+                dir_source, ansi['bold'], dir_path, ansi['reset'],
+                error_message))
+        return
+    
+    if directory_is_git_repo(dir_path):
+        out(0, "{} '{}{}{}' is a git repository:".format(dir_source,
+                ansi['bold'], dir_path, ansi['reset']))
+        update_repository(dir_path, dir_name)
+        
+    else:
+        repositories = []
+        
+        dir_contents = os.listdir(dir_path) # get potential repos in directory
+        for item in dir_contents:
+            repo_path = os.path.join(dir_path, item)
+            repo_name = os.path.join(dir_name, item)
+            if directory_is_git_repo(repo_path): # filter out non-repositories
+                repositories.append((repo_path, repo_name))
+        
+        repo_count = len(repositories)
+        if repo_count == 1:
+            pluralize = "repository"
+        else:
+            pluralize = "repositories"
+            
+        out(0, "{} '{}{}{}' contains {} git {}:".format(dir_source,
+                ansi['bold'], dir_path, ansi['reset'], repo_count, pluralize))
+
+        for repo_path, repo_name in repositories:
+            update_repository(repo_path, repo_name)
+
+def update_directories(paths):
+    """Update a list of directories supplied by command arguments."""
+    for path in paths:
+        path = os.path.abspath(path) # convert relative to absolute path
+        update_directory(path, get_tail_name(path), is_bookmark=False)
+
+def update_bookmarks():
+    """Loop through and update all bookmarks."""
+    try:
+        bookmarks = load_config_file().items("bookmarks")
+    except configparser.NoSectionError:
+        bookmarks = []
+    
+    if bookmarks:
+        for bookmark_path, bookmark_name in bookmarks:
+            update_directory(bookmark_path, bookmark_name, is_bookmark=True)
+    else:
+        out(0, """You don't have any bookmarks configured! Get help with
+                'gitup -h'.""")
+
+def load_config_file():
+    """Read the file storing our config options from config_filename and return
+    the resulting SafeConfigParser() object."""
+    config = configparser.SafeConfigParser()
+    config.optionxform = str # don't lowercase option names, because we are
+                             # storing paths there
+    config.read(config_filename)
+    return config
+
+def save_config_file(config):
+    """Save our config changes to the config file specified by
+    config_filename."""
+    with open(config_filename, "wb") as config_file:
+        config.write(config_file)
+
+def add_bookmarks(paths):
+    """Add a list of paths as bookmarks to the config file."""
+    config = load_config_file()
+    if not config.has_section("bookmarks"):
+        config.add_section("bookmarks")
+    
+    out(0, "{}Added bookmarks:{}".format(ansi['yellow'], ansi['reset']))
+    for path in paths:
+        path = os.path.abspath(path) # convert relative to absolute path
+        if config.has_option("bookmarks", path):
+            out(1, "'{}' is already bookmarked.".format(path))
+        else:
+            config.set("bookmarks", path, get_tail_name(path))
+            out(1, "{}{}{}".format(ansi['bold'], path, ansi['reset']))
+    
+    save_config_file(config)
+
+def delete_bookmarks(paths):
+    """Remove a list of paths from the bookmark config file."""
+    config = load_config_file()
+    
+    if config.has_section("bookmarks"):
+        out(0, "{}Deleted bookmarks:{}".format(ansi['yellow'], ansi['reset']))
+        for path in paths:
+            path = os.path.abspath(path) # convert relative to absolute path
+            config_was_changed = config.remove_option("bookmarks", path)
+            if config_was_changed:
+                out(1, "{}{}{}".format(ansi['bold'], path, ansi['reset']))
+            else:
+                out(1, "'{}' is not bookmarked.".format(path))
+        save_config_file(config)
+    
+    else:
+        out(0, "There are no bookmarks to delete!")
+
+def list_bookmarks():
+    """Print all of our current bookmarks."""
+    config = load_config_file()
+    try:
+        bookmarks = config.items("bookmarks")
+    except configparser.NoSectionError:
+        bookmarks = []
+    
+    if bookmarks:
+        out(0, "{}Current bookmarks:{}".format(ansi['yellow'], ansi['reset']))
+        for bookmark_path, bookmark_name in bookmarks:
+            out(1, bookmark_path)
+    else:
+        out(0, "You have no bookmarks to display.")
+
+def main():
+    """Parse arguments and then call the appropriate function(s)."""
+    parser = argparse.ArgumentParser(description="""Easily and intelligently
+            pull to multiple git projects at once.""", epilog="""Both relative
+            and absolute paths are accepted by all arguments. Questions?
+            Comments? Email the author at {}.""".format(__email__),
+            add_help=False)
+    
+    group_u = parser.add_argument_group("updating repositories")
+    group_b = parser.add_argument_group("bookmarking")
+    group_m = parser.add_argument_group("miscellaneous")
+    
+    group_u.add_argument('directories_to_update', nargs="*", metavar="path",
+            help="""update all projects in this directory (or the directory
+            itself, if it is a project)""")
+    
+    group_u.add_argument('-u', '--update', action="store_true", help="""update
+            all bookmarks (default behavior when called without arguments)""")
+    
+    group_b.add_argument('-a', '--add', dest="bookmarks_to_add", nargs="+",
+            metavar="path", help="add directory(s) as bookmarks")
+    
+    group_b.add_argument('-d', '--delete', dest="bookmarks_to_del", nargs="+",
+            metavar="path",
+            help="delete bookmark(s) (leaves actual directories alone)")
+    
+    group_b.add_argument('-l', '--list', dest="list_bookmarks",
+            action="store_true", help="list current bookmarks")
+    
+    group_m.add_argument('-h', '--help', action="help",
+            help="show this help message and exit")
+    
+    group_m.add_argument('-v', '--version', action="version",
+            version="gitup version "+__version__)
+    
+    args = parser.parse_args()
+    
+    print "{}gitup{}: the git-repo-updater".format(ansi['bold'], ansi['reset'])
+    
+    if args.bookmarks_to_add:
+        add_bookmarks(args.bookmarks_to_add)
+
+    if args.bookmarks_to_del:
+        delete_bookmarks(args.bookmarks_to_del)
+    
+    if args.list_bookmarks:
+        list_bookmarks()
+    
+    if args.directories_to_update:
+        update_directories(args.directories_to_update)
+    
+    if args.update:
+        update_bookmarks()
+    
+    if not any(vars(args).values()): # if they did not tell us to do anything,
+        update_bookmarks()           # automatically update bookmarks
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        out(0, "Stopped by user.")
diff --git a/setup.py b/setup.py
new file mode 100644
index 0000000..bd4c3d7
--- /dev/null
+++ b/setup.py
@@ -0,0 +1,46 @@
+from distutils.core import setup
+import os
+import sys
+
+if sys.hexversion < 0x02070000:
+    exit("Please upgrade to Python 2.7 or greater: <http://python.org/>.")
+
+remove_py_extension = True # install script as "gitup" instead of "gitup.py"
+
+if os.path.exists("gitup"):
+    remove_py_extension = False
+else:
+    os.rename("gitup.py", "gitup")
+
+desc = "Easily and intelligently pull to multiple git projects at once."
+
+with open('README.md') as file:
+    long_desc = file.read()
+
+try:
+    setup(
+        name = "gitup",
+        version = "0.1",
+        scripts = ['gitup'],
+        author = "Ben Kurtovic",
+        author_email = "ben.kurtovic@verizon.net",
+        description = desc,
+        long_description = long_desc,
+        license = "MIT License",
+        keywords = "git project repository pull update",
+        url = "http://github.com/earwig/git-repo-updater",
+        classifiers = ["Environment :: Console",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: MIT License",
+        "Natural Language :: English",
+        "Operating System :: MacOS :: MacOS X",
+        "Operating System :: POSIX :: Linux",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 2.7",
+        "Topic :: Software Development :: Version Control"
+        ]
+    )
+    
+finally:
+    if remove_py_extension:
+        os.rename("gitup", "gitup.py") # restore file location