|
| 1 | +package provider |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "errors" |
| 6 | + "io" |
| 7 | + "net" |
| 8 | + "os" |
| 9 | + "os/exec" |
| 10 | + "path/filepath" |
| 11 | + "testing" |
| 12 | + |
| 13 | + "github.com/gliderlabs/ssh" |
| 14 | + "github.com/go-git/go-git/v5" |
| 15 | + "github.com/go-git/go-git/v5/plumbing" |
| 16 | + "github.com/go-git/go-git/v5/plumbing/object" |
| 17 | + "github.com/stretchr/testify/assert" |
| 18 | + "github.com/stretchr/testify/require" |
| 19 | +) |
| 20 | + |
| 21 | +// nolint:gosec // Throw-away key for testing. DO NOT REUSE. |
| 22 | +const ( |
| 23 | + testSSHKey = `-----BEGIN OPENSSH PRIVATE KEY----- |
| 24 | +b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW |
| 25 | +QyNTUxOQAAACCtxz9h0yXzi/HqZBpSkA2xFo28v5W8O4HimI0ZzNpQkwAAAKhv/+X2b//l |
| 26 | +9gAAAAtzc2gtZWQyNTUxOQAAACCtxz9h0yXzi/HqZBpSkA2xFo28v5W8O4HimI0ZzNpQkw |
| 27 | +AAAED/G0HuohvSa8q6NzkZ+wRPW0PhPpo9Th8fvcBQDaxCia3HP2HTJfOL8epkGlKQDbEW |
| 28 | +jby/lbw7geKYjRnM2lCTAAAAInRlcnJhZm9ybS1wcm92aWRlci1lbnZidWlsZGVyLXRlc3 |
| 29 | +QBAgM= |
| 30 | +-----END OPENSSH PRIVATE KEY-----` |
| 31 | + testSSHPubKey = `ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIK3HP2HTJfOL8epkGlKQDbEWjby/lbw7geKYjRnM2lCT terraform-provider-envbuilder-test` |
| 32 | +) |
| 33 | + |
| 34 | +func setupGitRepo(t testing.TB, files map[string]string) string { |
| 35 | + t.Helper() |
| 36 | + |
| 37 | + dir := filepath.Join(t.TempDir(), "repo") |
| 38 | + |
| 39 | + writeFiles(t, dir, files) |
| 40 | + |
| 41 | + repo, err := git.PlainInitWithOptions(dir, &git.PlainInitOptions{ |
| 42 | + InitOptions: git.InitOptions{ |
| 43 | + DefaultBranch: plumbing.ReferenceName("refs/heads/main"), |
| 44 | + }, |
| 45 | + }) |
| 46 | + require.NoError(t, err, "init git repo") |
| 47 | + wt, err := repo.Worktree() |
| 48 | + require.NoError(t, err, "get worktree") |
| 49 | + _, err = wt.Add(".") |
| 50 | + require.NoError(t, err, "add files") |
| 51 | + _, err = wt.Commit("initial commit", &git.CommitOptions{ |
| 52 | + Author: &object.Signature{ |
| 53 | + Name: "test", |
| 54 | + |
| 55 | + }, |
| 56 | + }) |
| 57 | + require.NoError(t, err, "commit files") |
| 58 | + t.Logf("initialized git repo at %s", dir) |
| 59 | + |
| 60 | + return dir |
| 61 | +} |
| 62 | + |
| 63 | +func writeFiles(t testing.TB, destPath string, files map[string]string) { |
| 64 | + t.Helper() |
| 65 | + |
| 66 | + err := os.MkdirAll(destPath, 0o755) |
| 67 | + require.NoError(t, err, "create dest path") |
| 68 | + |
| 69 | + for relPath, content := range files { |
| 70 | + absPath := filepath.Join(destPath, relPath) |
| 71 | + d := filepath.Dir(absPath) |
| 72 | + bs := []byte(content) |
| 73 | + require.NoError(t, os.MkdirAll(d, 0o755)) |
| 74 | + require.NoError(t, os.WriteFile(absPath, bs, 0o644)) |
| 75 | + t.Logf("wrote %d bytes to %s", len(bs), absPath) |
| 76 | + } |
| 77 | +} |
| 78 | + |
| 79 | +type testGitRepoSSH struct { |
| 80 | + Dir string |
| 81 | + URL string |
| 82 | + Key string |
| 83 | +} |
| 84 | + |
| 85 | +func serveGitRepoSSH(ctx context.Context, t testing.TB, dir string) testGitRepoSSH { |
| 86 | + t.Helper() |
| 87 | + |
| 88 | + sshDir := filepath.Join(t.TempDir(), "ssh") |
| 89 | + require.NoError(t, os.Mkdir(sshDir, 0o700)) |
| 90 | + |
| 91 | + keyPath := filepath.Join(sshDir, "id_ed25519") |
| 92 | + require.NoError(t, os.WriteFile(keyPath, []byte(testSSHKey), 0o600)) |
| 93 | + |
| 94 | + // Start SSH server |
| 95 | + addr := startSSHServer(ctx, t, sshDir) |
| 96 | + |
| 97 | + // Serve git repo |
| 98 | + repoURL := "ssh://" + addr + dir |
| 99 | + return testGitRepoSSH{ |
| 100 | + Dir: dir, |
| 101 | + URL: repoURL, |
| 102 | + Key: keyPath, |
| 103 | + } |
| 104 | +} |
| 105 | + |
| 106 | +func startSSHServer(ctx context.Context, t testing.TB, dir string) string { |
| 107 | + t.Helper() |
| 108 | + |
| 109 | + s := &ssh.Server{ |
| 110 | + PublicKeyHandler: func(ctx ssh.Context, key ssh.PublicKey) bool { |
| 111 | + return true // Allow all keys. |
| 112 | + }, |
| 113 | + Handler: func(s ssh.Session) { |
| 114 | + t.Logf("session started: %s", s.RawCommand()) |
| 115 | + |
| 116 | + args := s.Command() |
| 117 | + cmd := exec.CommandContext(ctx, args[0], args[1:]...) |
| 118 | + |
| 119 | + in, err := cmd.StdinPipe() |
| 120 | + assert.NoError(t, err, "stdin pipe") |
| 121 | + out, err := cmd.StdoutPipe() |
| 122 | + assert.NoError(t, err, "stdout pipe") |
| 123 | + err = cmd.Start() |
| 124 | + if err != nil { |
| 125 | + t.Logf("command failed: %s", err) |
| 126 | + return |
| 127 | + } |
| 128 | + t.Cleanup(func() { |
| 129 | + _ = in.Close() |
| 130 | + _ = out.Close() |
| 131 | + _ = cmd.Process.Kill() |
| 132 | + }) |
| 133 | + |
| 134 | + go func() { |
| 135 | + _, _ = io.Copy(in, s) |
| 136 | + _ = in.Close() |
| 137 | + }() |
| 138 | + go func() { |
| 139 | + _, _ = io.Copy(s, out) |
| 140 | + _ = out.Close() |
| 141 | + _ = s.CloseWrite() |
| 142 | + }() |
| 143 | + err = cmd.Wait() |
| 144 | + if err != nil { |
| 145 | + t.Logf("command failed: %s", err) |
| 146 | + } |
| 147 | + |
| 148 | + t.Logf("session ended: %s", s.RawCommand()) |
| 149 | + |
| 150 | + s.Exit(cmd.ProcessState.ExitCode()) |
| 151 | + }, |
| 152 | + } |
| 153 | + |
| 154 | + ln, err := (&net.ListenConfig{}).Listen(ctx, "tcp", "localhost:0") |
| 155 | + require.NoError(t, err, "listen") |
| 156 | + |
| 157 | + go func() { |
| 158 | + err := s.Serve(ln) |
| 159 | + if !errors.Is(err, ssh.ErrServerClosed) { |
| 160 | + require.NoError(t, err) |
| 161 | + } |
| 162 | + }() |
| 163 | + t.Cleanup(func() { |
| 164 | + _ = s.Close() |
| 165 | + _ = ln.Close() |
| 166 | + }) |
| 167 | + |
| 168 | + return ln.Addr().String() |
| 169 | +} |
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