github.com/google/osv-scalibr@v0.4.1/extractor/filesystem/internal/parent_dir.go (about)

     1  // Copyright 2025 Google LLC
     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  package internal
    16  
    17  import "path/filepath"
    18  
    19  // ParentDir returns the parent dir up to n dirs deep.
    20  // If the path is below n dirs, the function returns path.
    21  // This function assumes no leading `/` or drive letter.
    22  func ParentDir(path string, n int) string {
    23  	for i, c := range path {
    24  		if c == filepath.Separator {
    25  			n--
    26  			if n == 0 {
    27  				return path[:i]
    28  			}
    29  		}
    30  	}
    31  	return path
    32  }