repository_restic_test.go 3.13 KB
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package tabacco

import (
	"bytes"
	"context"
	"io/ioutil"
	"os"
	"os/exec"
	"path/filepath"
	"testing"
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	"git.autistici.org/ale/tabacco/jobs"
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)

// Create a temporary directory with two subdirs: 'data', for
// the test backup data, and 'repo' to store the (remote)
// repository. Populate 'data' with two tiny files.
func createTempDirWithData(t *testing.T) string {
	tmpdir, err := ioutil.TempDir("", "")
	if err != nil {
		t.Fatal(err)
	}
	for _, d := range []string{"data", "repo", "restore"} {
		os.Mkdir(filepath.Join(tmpdir, d), 0700)
	}
	ioutil.WriteFile(
		filepath.Join(tmpdir, "data", "file1"),
		[]byte("this is file number one."),
		0600,
	)
	ioutil.WriteFile(
		filepath.Join(tmpdir, "data", "file2"),
		[]byte("this is file number two."),
		0600,
	)
	return tmpdir
}

// nolint: gocyclo
func TestRestic(t *testing.T) {
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	// Check that we can actually run restic.
	if err := checkResticVersion("restic"); err != nil {
		t.Skip("can't run restic: ", err)
	}

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	store := &dummyMetadataStore{}

	tmpdir := createTempDirWithData(t)
	defer os.RemoveAll(tmpdir)

	repoSpec := RepositorySpec{
		Name: "main",
		Type: "restic",
		Params: map[string]interface{}{
			"uri":      tmpdir + "/repo",
			"password": "testpass",
		},
	}
	handlerSpecs := []HandlerSpec{
		{
			Name: "data",
			Type: "file",
			Params: map[string]interface{}{
				"path": filepath.Join(tmpdir, "data"),
			},
		},
	}
	sourceSpecs := []SourceSpec{
		{
			Name:    "source1",
			Handler: "data",
			Atoms: []Atom{
				{
					Name:         "f1",
					RelativePath: "file1",
				},
				{
					Name:         "f2",
					RelativePath: "file2",
				},
			},
		},
	}
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	queueSpec := jobs.QueueSpec{
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		Workers: map[string]int{"backup": 2, "restore": 1},
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	}
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	// Run the backup.
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	configMgr, err := NewConfigManager(&Config{
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		Queue:        queueSpec,
		Repository:   repoSpec,
		HandlerSpecs: handlerSpecs,
		SourceSpecs:  sourceSpecs,
	})
	if err != nil {
		t.Fatal(err)
	}
	defer configMgr.Close()

	m, err := NewManager(context.TODO(), configMgr, store)
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	if err != nil {
		t.Fatal(err)
	}
	defer m.Close()

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	backup, err := m.Backup(context.TODO(), configMgr.getSourceSpecs())
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	if err != nil {
		t.Fatal(err)
	}
	if backup.ID == "" || backup.Host == "" {
		t.Fatalf("empty fields in backup: %+v", backup)
	}

	// Check the 'restic snapshots' output.
	output, _ := exec.Command("env", "RESTIC_PASSWORD=testpass", "restic", "-r", tmpdir+"/repo", "snapshots", "--json").Output()
	snaps, err := parseResticSnapshots(output)
	if err != nil {
		t.Fatalf("parsing restic snaphots output: %v", err)
	}
	if len(snaps) != 1 {
		t.Fatalf("wrong number of snapshots: %+v", snaps)
	}
	snap := snaps[0]
	if len(snap.Tags) != 2 {
		t.Fatalf("woops, bad number of tags: %+v", snap)
	}

	// Now try to restore.
	err = m.Restore(
		context.TODO(),
		FindRequest{Pattern: "source1/*"},
		tmpdir+"/restore",
	)
	if err != nil {
		t.Fatal("Restore", err)
	}
	data, err := ioutil.ReadFile(filepath.Join(tmpdir, "restore", tmpdir, "data", "file1"))
	if err != nil {
		t.Fatalf("data/file1 has not been restored: %v", err)
	}
	if !bytes.Equal(data, []byte("this is file number one.")) {
		t.Fatalf("data/file1 has bad restored contents: %s", string(data))
	}
}