def main(host='localhost', port=5432):
"""Convert YAML specifications to database DDL."""
parser = ArgumentParser(parents=[parent_parser()],
description="Generate SQL statements to update a "
"PostgreSQL database to match the schema specified"
" in a YAML file")
parser.add_argument('spec', nargs='?', type=FileType('r'),
default=sys.stdin, help='YAML specification')
parser.add_argument('-1', '--single-transaction', action='store_true',
dest='onetrans', help="wrap commands in BEGIN/COMMIT")
parser.add_argument('-u', '--update', action='store_true',
help="apply changes to database (implies -1)")
parser.add_argument('-n', '--schema', dest='schlist', action='append',
help="only for named schemas (default all)")
parser.set_defaults(host=host, port=port, username=os.getenv("USER"))
args = parser.parse_args()
dbconn = DbConnection(args.dbname, args.username, args.password,
args.host, args.port)
db = Database(dbconn)
inmap = yaml.load(args.spec)
if args.schlist:
kschlist = ['schema ' + sch for sch in args.schlist]
for sch in inmap.keys():
if sch not in kschlist:
del inmap[sch]
stmts = db.diff_map(inmap, args.schlist)
if args.output:
fd = args.output
sys.stdout = fd
if stmts:
if args.onetrans or args.update:
print("BEGIN;")
print(";\n".join(stmts) + ';')
if args.onetrans or args.update:
print("COMMIT;")
if args.update:
dbconn.connect()
try:
for stmt in stmts:
dbconn.conn.cursor().execute(stmt)
except:
dbconn.conn.rollback()
raise
else:
dbconn.conn.commit()
print("Changes applied", file=sys.stderr)
if args.output:
fd.close()
def main(host='localhost', port=5432, schema=None):
"""Convert database table specifications to YAML."""
parser = ArgumentParser(parents=[parent_parser()],
description="Extract the schema of a PostgreSQL "
"database in YAML format")
parser.add_argument('-n', '--schema',
help="only for named schema (default %(default)s)")
parser.add_argument('-t', '--table', dest='tablist', action='append',
help="only for named tables (default all)")
parser.set_defaults(host=host, port=port, username=os.getenv("USER"),
schema=schema)
args = parser.parse_args()
db = Database(DbConnection(args.dbname, args.username, args.password,
args.host, args.port))
dbmap = db.to_map()
# trim the map of schemas/tables not selected
if args.schema:
skey = 'schema ' + args.schema
for sch in dbmap.keys():
if sch[:7] == 'schema ' and sch != skey:
del dbmap[sch]
if args.tablist:
ktablist = ['table ' + tbl for tbl in args.tablist]
for sch in dbmap.keys():
if sch[:7] == 'schema ':
for tbl in dbmap[sch].keys():
if tbl not in ktablist:
del dbmap[sch][tbl]
if not dbmap[sch]:
del dbmap[sch]
if args.output:
fd = args.output
sys.stdout = fd
print(yaml.dump(dbmap, default_flow_style=False))
if args.output:
fd.close()
def main(host='localhost', port=5432, schema=None):
"""Convert database table specifications to YAML."""
parser = ArgumentParser(parents=[parent_parser()],
description="Extract the schema of a PostgreSQL "
"database in YAML format")
parser.add_argument('-n', '--schema',
help="only for named schema (default %(default)s)")
parser.add_argument('-t', '--table', dest='tablist', action='append',
help="only for named tables (default all)")
parser.set_defaults(host=host, port=port, username=os.getenv("USER"),
schema=schema)
args = parser.parse_args()
pswd = (args.password and getpass.getpass() or '')
db = Database(args.dbname, args.username, pswd, args.host, args.port)
dbmap = db.to_map([args.schema], args.tablist)
if args.output:
fd = args.output
sys.stdout = fd
print(yaml.dump(dbmap, default_flow_style=False))
if args.output:
fd.close()
def main(host='localhost', port=5432, schema=None):
"""Convert database table specifications to YAML."""
parser = ArgumentParser(parents=[parent_parser()],
description="Extract the schema of a PostgreSQL "
"database in YAML format")
group = parser.add_argument_group("Object inclusion/exclusion options",
"(each can be given multiple times)")
group.add_argument('-n', '--schema', metavar='SCHEMA', dest='schemas',
action='append', default=[],
help="extract the named schema(s) (default all)")
group.add_argument('-N', '--exclude-schema', metavar='SCHEMA',
dest='excl_schemas', action='append', default=[],
help="do NOT extract the named schema(s) "
"(default none)")
group.add_argument('-t', '--table', metavar='TABLE', dest='tables',
action='append', default=[],
help="extract the named table(s) (default all)")
group.add_argument('-T', '--exclude-table', metavar='TABLE',
dest='excl_tables', action='append', default=[],
help="do NOT extract the named table(s) "
"(default none)")
parser.set_defaults(host=host, port=port, schema=schema,
username=os.getenv("PGUSER") or os.getenv("USER"))
args = parser.parse_args()
pswd = (args.password and getpass.getpass() or None)
db = Database(args.dbname, args.username, pswd, args.host, args.port)
dbmap = db.to_map(schemas=args.schemas, tables=args.tables,
exclude_schemas=args.excl_schemas,
exclude_tables=args.excl_tables)
print(yaml.dump(dbmap, default_flow_style=False),
file=args.output or sys.stdout)
if args.output:
args.output.close()
