github.com/GoogleContainerTools/kaniko@v1.23.0/pkg/buildcontext/tar_test.go (about)

     1  /*
     2  Copyright 2018 Google LLC
     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 buildcontext
    18  
    19  import (
    20  	"bytes"
    21  	"compress/gzip"
    22  	"fmt"
    23  	"os"
    24  	"path/filepath"
    25  	"runtime"
    26  	"sync"
    27  	"testing"
    28  
    29  	"github.com/GoogleContainerTools/kaniko/pkg/util"
    30  	"github.com/GoogleContainerTools/kaniko/testutil"
    31  )
    32  
    33  func TestBuildWithLocalTar(t *testing.T) {
    34  	_, ex, _, _ := runtime.Caller(0)
    35  	cwd := filepath.Dir(ex)
    36  
    37  	testDir := "test_dir"
    38  	testDirLongPath := filepath.Join(cwd, testDir)
    39  	dirUnpack := filepath.Join(testDirLongPath, "dir_where_to_unpack")
    40  
    41  	if err := os.MkdirAll(dirUnpack, 0750); err != nil {
    42  		t.Errorf("Failed to create dir_where_to_extract: %v", err)
    43  	}
    44  
    45  	validDockerfile := "Dockerfile_valid"
    46  	invalidDockerfile := "Dockerfile_invalid"
    47  	nonExistingDockerfile := "Dockerfile_non_existing"
    48  
    49  	files := map[string]string{
    50  		validDockerfile:   "FROM debian:10.13\nRUN echo \"valid\"",
    51  		invalidDockerfile: "FROM debian:10.13\nRUN echo \"invalid\"",
    52  	}
    53  
    54  	if err := testutil.SetupFiles(testDir, files); err != nil {
    55  		t.Errorf("Failed to setup files %v on %s: %v", files, testDir, err)
    56  	}
    57  
    58  	if err := os.Chdir(testDir); err != nil {
    59  		t.Fatalf("Failed to Chdir on %s: %v", testDir, err)
    60  	}
    61  
    62  	validTarPath := fmt.Sprintf("%s.tar.gz", validDockerfile)
    63  	invalidTarPath := fmt.Sprintf("%s.tar.gz", invalidDockerfile)
    64  	nonExistingTarPath := fmt.Sprintf("%s.tar.gz", nonExistingDockerfile)
    65  
    66  	var wg sync.WaitGroup
    67  	wg.Add(1)
    68  	// Create Tar Gz File with dockerfile inside
    69  	go func(wg *sync.WaitGroup) {
    70  		defer wg.Done()
    71  		validTarFile, err := os.Create(validTarPath)
    72  		if err != nil {
    73  			t.Errorf("Failed to create %s: %v", validTarPath, err)
    74  		}
    75  		defer validTarFile.Close()
    76  
    77  		invalidTarFile, err := os.Create(invalidTarPath)
    78  		if err != nil {
    79  			t.Errorf("Failed to create %s: %v", invalidTarPath, err)
    80  		}
    81  		defer invalidTarFile.Close()
    82  
    83  		gw := gzip.NewWriter(validTarFile)
    84  		defer gw.Close()
    85  
    86  		tw := util.NewTar(gw)
    87  		defer tw.Close()
    88  
    89  		if err := tw.AddFileToTar(validDockerfile); err != nil {
    90  			t.Errorf("Failed to add %s to %s: %v", validDockerfile, validTarPath, err)
    91  		}
    92  	}(&wg)
    93  
    94  	// Waiting for the Tar Gz file creation to be done before moving on
    95  	wg.Wait()
    96  
    97  	tests := []struct {
    98  		dockerfile       string
    99  		srcContext       string
   100  		unpackShouldErr  bool
   101  		srcShaShouldErr  bool
   102  		destShaShouldErr bool
   103  	}{
   104  		{
   105  			dockerfile:       validDockerfile,
   106  			srcContext:       filepath.Join(testDir, validTarPath),
   107  			unpackShouldErr:  false,
   108  			srcShaShouldErr:  false,
   109  			destShaShouldErr: false,
   110  		},
   111  		{
   112  			dockerfile:       invalidDockerfile,
   113  			srcContext:       filepath.Join(testDir, invalidTarPath),
   114  			unpackShouldErr:  true,
   115  			srcShaShouldErr:  false,
   116  			destShaShouldErr: true,
   117  		},
   118  		{
   119  			dockerfile:       nonExistingDockerfile,
   120  			srcContext:       filepath.Join(testDir, nonExistingTarPath),
   121  			unpackShouldErr:  true,
   122  			srcShaShouldErr:  true,
   123  			destShaShouldErr: true,
   124  		},
   125  	}
   126  
   127  	for _, tt := range tests {
   128  		t.Run(tt.dockerfile, func(t *testing.T) {
   129  			err := util.UnpackCompressedTar(filepath.Join(cwd, tt.srcContext), dirUnpack)
   130  			testutil.CheckError(t, tt.unpackShouldErr, err)
   131  			srcSHA, err := getSHAFromFilePath(tt.dockerfile)
   132  			testutil.CheckError(t, tt.srcShaShouldErr, err)
   133  			destSHA, err := getSHAFromFilePath(filepath.Join(dirUnpack, tt.dockerfile))
   134  			testutil.CheckError(t, tt.destShaShouldErr, err)
   135  			if err == nil {
   136  				testutil.CheckDeepEqual(t, srcSHA, destSHA)
   137  			}
   138  		})
   139  	}
   140  
   141  	if err := os.RemoveAll(testDirLongPath); err != nil {
   142  		t.Errorf("Failed to remove %s: %v", testDirLongPath, err)
   143  	}
   144  }
   145  
   146  func getSHAFromFilePath(f string) (string, error) {
   147  	data, err := os.ReadFile(f)
   148  	if err != nil {
   149  		return "", err
   150  	}
   151  	sha, err := util.SHA256(bytes.NewReader(data))
   152  	if err != nil {
   153  		return "", err
   154  	}
   155  
   156  	return sha, nil
   157  }