def main():
"""Convert YAML specifications to database DDL."""
parser = cmd_parser("Generate SQL statements to update a PostgreSQL "
"database to match the schema specified in a "
"YAML-formatted file(s)", __version__)
parser.add_argument('-m', '--multiple-files', action='store_true',
help='input from multiple files (metadata directory)')
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('--revert', action='store_true',
help="generate SQL to revert changes")
parser.add_argument('--quote-reserved', action='store_true',
help="quote SQL reserved words")
parser.add_argument('-n', '--schema', metavar='SCHEMA', dest='schemas',
action='append', default=[],
help="process only named schema(s) (default all)")
cfg = parse_args(parser)
output = cfg['files']['output']
options = cfg['options']
db = Database(cfg)
if options.multiple_files:
inmap = db.map_from_dir()
else:
inmap = yaml.safe_load(options.spec)
stmts = db.diff_map(inmap)
if stmts:
fd = output or sys.stdout
if options.onetrans or options.update:
print("BEGIN;", file=fd)
for stmt in stmts:
if isinstance(stmt, tuple):
outstmt = "".join(stmt) + '\n'
else:
outstmt = "%s;\n" % stmt
if PY2:
outstmt = outstmt.encode('utf-8')
print(outstmt, file=fd)
if options.onetrans or options.update:
print("COMMIT;", file=fd)
if options.update:
try:
for stmt in stmts:
if isinstance(stmt, tuple):
# expected format: (\copy, table, from, path, csv)
db.dbconn.copy_from(stmt[3], stmt[1])
else:
db.dbconn.execute(stmt)
except:
db.dbconn.rollback()
raise
else:
db.dbconn.commit()
print("Changes applied", file=sys.stderr)
if output:
output.close()
def main():
"""Convert YAML specifications to database DDL."""
parser = cmd_parser(
"Generate SQL statements to update a PostgreSQL "
"database to match the schema specified in a "
"YAML-formatted file(s)", __version__)
parser.add_argument('-m',
'--multiple-files',
action='store_true',
help='input from multiple files (metadata directory)')
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('--revert',
action='store_true',
help="generate SQL to revert changes (experimental)")
parser.add_argument('-n',
'--schema',
metavar='SCHEMA',
dest='schemas',
action='append',
default=[],
help="process only named schema(s) (default all)")
cfg = parse_args(parser)
output = cfg['files']['output']
options = cfg['options']
db = Database(cfg)
if options.multiple_files:
inmap = db.map_from_dir()
else:
try:
inmap = yaml.safe_load(options.spec)
except Exception as exc:
print("Unable to process the input YAML file")
print("Error is '%s'" % exc)
return 1
stmts = db.diff_map(inmap)
if stmts:
fd = output or sys.stdout
if options.onetrans or options.update:
print("BEGIN;", file=fd)
for stmt in stmts:
if isinstance(stmt, tuple):
outstmt = "".join(stmt) + '\n'
else:
outstmt = "%s;\n" % stmt
if PY2:
outstmt = outstmt.encode('utf-8')
print(outstmt, file=fd)
if options.onetrans or options.update:
print("COMMIT;", file=fd)
if options.update:
try:
for stmt in stmts:
if isinstance(stmt, tuple):
# expected format: (\copy, table, from, path, csv)
db.dbconn.copy_from(stmt[3], stmt[1])
else:
db.dbconn.execute(stmt)
except:
db.dbconn.rollback()
raise
else:
db.dbconn.commit()
print("Changes applied", file=sys.stderr)
if output:
output.close()
