github.com/cockroachdb/cockroach@v20.2.0-alpha.1+incompatible/pkg/testutils/files.go (about)

     1  // Copyright 2017 The Cockroach Authors.
     2  //
     3  // Use of this software is governed by the Business Source License
     4  // included in the file licenses/BSL.txt.
     5  //
     6  // As of the Change Date specified in that file, in accordance with
     7  // the Business Source License, use of this software will be governed
     8  // by the Apache License, Version 2.0, included in the file
     9  // licenses/APL.txt.
    10  
    11  package testutils
    12  
    13  import (
    14  	"bufio"
    15  	"io"
    16  	"io/ioutil"
    17  	"os"
    18  	"path/filepath"
    19  )
    20  
    21  // ReadAllFiles reads all of the files matching pattern, thus ensuring they are
    22  // in the OS buffer cache.
    23  func ReadAllFiles(pattern string) {
    24  	matches, err := filepath.Glob(pattern)
    25  	if err != nil {
    26  		return
    27  	}
    28  	for _, m := range matches {
    29  		f, err := os.Open(m)
    30  		if err != nil {
    31  			continue
    32  		}
    33  		_, _ = io.Copy(ioutil.Discard, bufio.NewReader(f))
    34  		f.Close()
    35  	}
    36  }