github.com/cloudfoundry/libcfbuildpack@v1.91.23/helper/has_file.go (about)

     1  /*
     2   * Copyright 2018-2020 the original author or authors.
     3   *
     4   * Licensed under the Apache License, Version 2.0 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   *
     8   *      https://www.apache.org/licenses/LICENSE-2.0
     9   *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  package helper
    18  
    19  import (
    20  	"regexp"
    21  )
    22  
    23  // HasFile searches a directory structure for a file matching the provided pattern, returning true if found.
    24  func HasFile(root string, pattern *regexp.Regexp) (bool, error) {
    25  	f, err := FindFiles(root, pattern)
    26  	if err != nil {
    27  		return false, err
    28  	}
    29  
    30  	return len(f) > 0, nil
    31  
    32  }