Initializing a new trac database for an existing environment.

gistfile1.py

from trac.env import Environment
from trac.db import DatabaseManager
from trac import db_default

env = Environment("/path/to/my/env")
DatabaseManager(env).init_db()
with env.db_transaction as db:
  for table, cols, vals in db_default.get_data(db):
    db.executemany("INSERT INTO %s (%s) VALUES (%s)" % (table, ','.join(cols), ','.join(['%s' for c in cols])), vals)

import pkg_resources
from trac.wiki.admin import WikiAdmin

pages_dir = pkg_resources.resource_filename('trac.wiki', 'default-pages')
WikiAdmin(env).load_pages(pages_dir)