risingwave_connector/source/filesystem/s3/
enumerator.rs

1// Copyright 2025 RisingWave Labs
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15/// Get the prefix from a glob
16pub fn get_prefix(glob: &str) -> String {
17    let mut escaped = false;
18    let mut escaped_filter = false;
19    glob.chars()
20        .take_while(|c| match (c, &escaped) {
21            ('*', false) => false,
22            ('[', false) => false,
23            ('{', false) => false,
24            ('\\', false) => {
25                escaped = true;
26                true
27            }
28            (_, false) => true,
29            (_, true) => {
30                escaped = false;
31                true
32            }
33        })
34        .filter(|c| match (c, &escaped_filter) {
35            (_, true) => {
36                escaped_filter = false;
37                true
38            }
39            ('\\', false) => {
40                escaped_filter = true;
41                false
42            }
43            (_, _) => true,
44        })
45        .collect()
46}
risingwave_connector/source/filesystem/s3/enumerator.rs

risingwave_connector/source/filesystem/s3/
enumerator.rs
