mirror of https://github.com/docker/compose.git
42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
/*
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Copyright 2020 Docker Compose CLI authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package watch
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import (
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"fmt"
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"os"
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"path/filepath"
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)
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func greatestExistingAncestor(path string) (string, error) {
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if path == string(filepath.Separator) ||
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path == fmt.Sprintf("%s%s", filepath.VolumeName(path), string(filepath.Separator)) {
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return "", fmt.Errorf("cannot watch root directory")
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}
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_, err := os.Stat(path)
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if err != nil && !os.IsNotExist(err) {
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return "", fmt.Errorf("os.Stat(%q): %w", path, err)
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}
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if os.IsNotExist(err) {
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return greatestExistingAncestor(filepath.Dir(path))
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}
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return path, nil
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}
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