istio.io/istio@v0.0.0-20240520182934-d79c90f27776/cni/pkg/install/binaries.go (about)

     1  // Copyright Istio Authors
     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 install
    16  
    17  import (
    18  	"os"
    19  	"path/filepath"
    20  
    21  	"istio.io/istio/pkg/file"
    22  	"istio.io/istio/pkg/util/sets"
    23  )
    24  
    25  // Copies/mirrors any files present in a single source dir to N number of target dirs
    26  // and returns a set of the filenames copied.
    27  func copyBinaries(srcDir string, targetDirs []string) (sets.String, error) {
    28  	copiedFilenames := sets.String{}
    29  	srcFiles, err := os.ReadDir(srcDir)
    30  	if err != nil {
    31  		return copiedFilenames, err
    32  	}
    33  
    34  	for _, f := range srcFiles {
    35  		if f.IsDir() {
    36  			continue
    37  		}
    38  
    39  		filename := f.Name()
    40  		srcFilepath := filepath.Join(srcDir, filename)
    41  
    42  		for _, targetDir := range targetDirs {
    43  			if err := file.AtomicCopy(srcFilepath, targetDir, filename); err != nil {
    44  				installLog.Errorf("Failed file copy of %s to %s: %s", srcFilepath, targetDir, err.Error())
    45  				return copiedFilenames, err
    46  			}
    47  			installLog.Infof("Copied %s to %s.", filename, targetDir)
    48  		}
    49  
    50  		copiedFilenames.Insert(filename)
    51  	}
    52  
    53  	return copiedFilenames, nil
    54  }