github.com/abayer/test-infra@v0.0.5/kubetest/dind/util.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes 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      http://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 dind implements dind specific kubetest code.
    18  package dind
    19  
    20  import (
    21  	"bufio"
    22  	"fmt"
    23  	"os"
    24  	"strings"
    25  
    26  	"k8s.io/test-infra/kubetest/util"
    27  )
    28  
    29  // GetDockerVersion reads the stable-status.txt file from bazel to get the docker artifact version.
    30  func GetDockerVersion() (string, error) {
    31  	fileName := util.K8s("kubernetes", "bazel-out", "stable-status.txt")
    32  	file, err := os.Open(fileName)
    33  	if err != nil {
    34  		return "", err
    35  	}
    36  	defer file.Close()
    37  
    38  	scanner := bufio.NewScanner(file)
    39  	for scanner.Scan() {
    40  		tokens := strings.Fields(scanner.Text())
    41  		if len(tokens) < 2 {
    42  			continue
    43  		}
    44  		if tokens[0] != "STABLE_DOCKER_TAG" {
    45  			continue
    46  		}
    47  		return tokens[1], nil
    48  	}
    49  
    50  	if err = scanner.Err(); err != nil {
    51  		return "", err
    52  	}
    53  	return "", fmt.Errorf("docker tag not found in file %s", fileName)
    54  }