dump_gitlab_json.py

#!/usr/bin/env python3
# License: BSD 3 clause
'''
Export all users/issues from GitLab to JIRA JSON format.

:author: Dan Blanchard (dblanchard@ets.org)
:organization: ETS
:date: May 2014
'''

import argparse
import getpass
import json
import logging
import re
import sys
from collections import defaultdict
from datetime import datetime
from functools import partial
from io import StringIO

from gitlab import Gitlab as GitLab
from dateutil.parser import parse as parsedate

__version__ = '0.1.0'


def get_datetime(date_str):
    ''' Turns a YYYY-MM-DD string into a datetime object '''
    return datetime.strptime(date_str, '%Y-%m-%d')


def gen_all_results(method, *args, per_page=20, **kwargs):
    '''
    Little helper function to generate all pages of results for a given method
    in one list.
    '''
    get_more = True
    page_num = 0
    if 'page' in kwargs:
        kwargs.pop('page')
    while get_more:
        page_num += 1
        proj_page = method(*args, page=page_num, per_page=per_page, **kwargs)
        # proj_page will be False if method fails
        if proj_page:
            get_more = len(proj_page) == per_page
            yield from iter(proj_page)
        else:
            get_more = False


def md_to_wiki(md_string):
    '''
    Take Markdown-formatted comments and convert them to Wiki format.
    '''
    output_buf = StringIO()
    if md_string is not None:
        for line in md_string.splitlines():
            # Code blocks
            line = re.sub(r'```([a-z]+)$', r'{code:\1}', line)
            line = re.sub(r'```$', r'{code}', line)
            # Emoji
            line = line.replace(':+1:', '(y)')
            line = line.replace(':-1:', '(n)')
            # Hyperlinks
            line = re.sub(r'\[([^\]]+)\]\(([^\)]+)\)', r'[\1|\2]', line)
            # Usernames
            line = re.sub(r'@([a-zA-Z0-9]+)(\b|_$)', r'[~\1]\2', line)
            print(line, file=output_buf)
    else:
        print('', file=output_buf)
    return output_buf.getvalue()


def main(argv=None):
    '''
    Process the command line arguments and create the JSON dump.

    :param argv: List of arguments, as if specified on the command-line.
                 If None, ``sys.argv[1:]`` is used instead.
    :type argv: list of str
    '''
    # Get command line arguments
    parser = argparse.ArgumentParser(
        description="Export all users/issues from GitLab to JIRA JSON format.",
        formatter_class=argparse.ArgumentDefaultsHelpFormatter,
        conflict_handler='resolve')
    parser.add_argument('gitlab_url',
                        help='The full URL to your GitLab instance.')
    parser.add_argument('-d', '--date_filter',
                        help='Only include issues, notes, etc. created after\
                              the specified date. Expected format is \
                              YYYY-MM-DD',
                        type=get_datetime, default='1970-01-01')
    parser.add_argument('-e', '--include_empty',
                        help='Include projects in output that do not have any\
                              issues.',
                        action='store_true')
    parser.add_argument('-i', '--ignore_list',
                        help='List of project names to exclude from dump.',
                        type=argparse.FileType('r'))
    parser.add_argument('-p', '--password',
                        help='The password to use to authenticate if token is \
                              not specified. If password and token are both \
                              unspecified, you will be prompted to enter a \
                              password.')
    parser.add_argument('-P', '--page_size',
                        help='When retrieving result from GitLab, how many \
                              results should be included in a given page?.',
                        type=int, default=20)
    parser.add_argument('-s', '--verify_ssl',
                        help='Enable SSL certificate verification',
                        action='store_true')
    parser.add_argument('-t', '--token',
                        help='The private GitLab API token to use for \
                              authentication. Either this or username and \
                              password must be set.')
    parser.add_argument('-u', '--username',
                        help='The username to use for authentication, if token\
                              is unspecified.')
    parser.add_argument('-v', '--verbose',
                        help='Print more status information. For every ' +
                             'additional time this flag is specified, ' +
                             'output gets more verbose.',
                        default=0, action='count')
    parser.add_argument('--version', action='version',
                        version='%(prog)s {0}'.format(__version__))
    args = parser.parse_args(argv)

    args.page_size = max(100, args.page_size)

    # Convert verbose flag to actually logging level
    log_levels = [logging.WARNING, logging.INFO, logging.DEBUG]
    log_level = log_levels[min(args.verbose, 2)]
    # Make warnings from built-in warnings module get formatted more nicely
    logging.captureWarnings(True)
    logging.basicConfig(format=('%(asctime)s - %(name)s - %(levelname)s - ' +
                                '%(message)s'), level=log_level)

    # Setup authenticated GitLab instance
    if args.token:
        git = GitLab(args.gitlab_url, token=args.token,
                     verify_ssl=args.verify_ssl)
    else:
        if not args.username:
            print('Username: ', end="", file=sys.stderr)
            args.username = input('').strip()
        if not args.password:
            args.password = getpass.getpass('Password: ')
        git = GitLab(args.gitlab_url, verify_ssl=args.verify_ssl)
        git.login(args.username, args.password)

    # Initialize output dictionary
    output_dict = defaultdict(list)

    print('Creating project entries...', end="", file=sys.stderr)
    sys.stderr.flush()
    key_set = set()
    mentioned_users = set()
    if args.ignore_list is not None:
        ignore_list = {line.strip().lower() for line in args.ignore_list}
    else:
        ignore_list = {}
    for project in gen_all_results(git.getprojectsall,
                                   per_page=args.page_size):
        proj_name_lower = project['name'].lower()
        if proj_name_lower not in ignore_list and project['issues_enabled']:
            project_issues = []
            for issue in gen_all_results(git.getprojectissues, project['id'],
                                         per_page=args.page_size):
                if args.date_filter < parsedate(issue['updated_at']).replace(tzinfo=None):
                    project_issues.append(issue)
                else:
                    for note in git.getissuewallnotes(project['id'],
                                                      issue['id']):
                        if args.date_filter < parsedate(issue['updated_at']).replace(tzinfo=None):
                            project_issues.append(issue)
                            break

            if project_issues or args.include_empty:
                jira_project = {}
                jira_project['name'] = project['name_with_namespace']
                key = project['name']
                if key.islower():
                    key = key.title()
                key = re.sub(r'[^A-Z]', '', key)
                if len(key) < 2:
                    key = re.sub(r'[^A-Za-z]', '',
                                 project['name'])[0:2].upper()
                added = False
                suffix = 65
                while key in key_set:
                    if not added:
                        key += 'A'
                    else:
                        suffix += 1
                        key = key[:-1] + chr(suffix)
                key_set.add(key)
                jira_project['key'] = key
                jira_project['description'] = md_to_wiki(project['description'])
                # jira_project['created'] = project['created_at']
                jira_project['issues'] = []
                for issue in project_issues:
                    jira_issue = {}
                    jira_issue['externalId'] = issue['iid']
                    if issue['state'] == 'closed':
                        jira_issue['status'] = 'Closed'
                        jira_issue['resolution'] = 'Resolved'
                    else:
                        jira_issue['status'] = 'Open'

                    jira_issue['description'] = md_to_wiki(issue['description'])
                    jira_issue['reporter'] = issue['author']['username']
                    mentioned_users.add(jira_issue['reporter'])
                    jira_issue['labels'] = issue['labels']
                    jira_issue['summary'] = issue['title']
                    if issue['assignee']:
                        jira_issue['assignee'] = issue['assignee']['username']
                        mentioned_users.add(jira_issue['assignee'])
                    jira_issue['issueType'] = 'Bug'
                    jira_issue['comments'] = []
                    # Get all comments/notes
                    for note in git.getissuewallnotes(project['id'],
                                                      issue['id']):
                        jira_note = {}
                        jira_note['body'] = md_to_wiki(note['body'])
                        jira_note['author'] = note['author']['username']
                        mentioned_users.add(jira_note['author'])
                        jira_note['created'] = note['created_at']
                        jira_issue['comments'].append(jira_note)
                    jira_project['issues'].append(jira_issue)

                output_dict['projects'].append(jira_project)
        print('.', end="", file=sys.stderr)
        sys.stderr.flush()

    print('\nCreating user entries...', end="", file=sys.stderr)
    sys.stderr.flush()
    for user in gen_all_results(git.getusers, per_page=args.page_size):
        # Only add users who are actually referenced in issues
        if user['username'] in mentioned_users:
            jira_user = {}
            jira_user['name'] = user['username']
            jira_user['fullname'] = user['name']
            jira_user['email'] = user['email']
            jira_user['groups'] = ['gitlab-users']
            jira_user['active'] = (user['state'] == 'active')
            output_dict['users'].append(jira_user)
        print('.', end="", file=sys.stderr)
        sys.stderr.flush()

    print('\nPrinting JSON output...', file=sys.stderr)
    sys.stderr.flush()
    print(json.dumps(output_dict, indent=4))


if __name__ == '__main__':
    main()