ca0f89d3bc
The Cobra commands are now a light wrapper around the App struct. Co-authored-by: Jose Garcia <josebalius@github.com>
118 lines
3.3 KiB
Go
118 lines
3.3 KiB
Go
package codespaces
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import (
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"net"
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"strings"
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"time"
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"github.com/github/ghcs/internal/api"
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"github.com/github/ghcs/internal/liveshare"
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)
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// PostCreateStateStatus is a string value representing the different statuses a state can have.
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type PostCreateStateStatus string
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func (p PostCreateStateStatus) String() string {
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return strings.Title(string(p))
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}
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const (
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PostCreateStateRunning PostCreateStateStatus = "running"
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PostCreateStateSuccess PostCreateStateStatus = "succeeded"
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PostCreateStateFailed PostCreateStateStatus = "failed"
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)
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// PostCreateState is a combination of a state and status value that is captured
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// during codespace creation.
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type PostCreateState struct {
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Name string `json:"name"`
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Status PostCreateStateStatus `json:"status"`
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}
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// PollPostCreateStates watches for state changes in a codespace,
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// and calls the supplied poller for each batch of state changes.
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// It runs until it encounters an error, including cancellation of the context.
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func PollPostCreateStates(ctx context.Context, log logger, apiClient apiClient, user *api.User, codespace *api.Codespace, poller func([]PostCreateState)) (err error) {
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token, err := apiClient.GetCodespaceToken(ctx, user.Login, codespace.Name)
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if err != nil {
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return fmt.Errorf("getting codespace token: %w", err)
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}
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session, err := ConnectToLiveshare(ctx, log, apiClient, user.Login, token, codespace)
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if err != nil {
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return fmt.Errorf("connect to Live Share: %w", err)
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}
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defer func() {
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if closeErr := session.Close(); err == nil {
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err = closeErr
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}
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}()
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// Ensure local port is listening before client (getPostCreateOutput) connects.
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listen, err := net.Listen("tcp", ":0") // arbitrary port
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if err != nil {
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return err
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}
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localPort := listen.Addr().(*net.TCPAddr).Port
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log.Println("Fetching SSH Details...")
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remoteSSHServerPort, sshUser, err := session.StartSSHServer(ctx)
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if err != nil {
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return fmt.Errorf("error getting ssh server details: %w", err)
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}
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tunnelClosed := make(chan error, 1) // buffered to avoid sender stuckness
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go func() {
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fwd := liveshare.NewPortForwarder(session, "sshd", remoteSSHServerPort)
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tunnelClosed <- fwd.ForwardToListener(ctx, listen) // error is non-nil
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}()
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t := time.NewTicker(1 * time.Second)
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defer t.Stop()
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for {
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select {
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case <-ctx.Done():
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return ctx.Err()
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case err := <-tunnelClosed:
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return fmt.Errorf("connection failed: %w", err)
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case <-t.C:
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states, err := getPostCreateOutput(ctx, localPort, codespace, sshUser)
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if err != nil {
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return fmt.Errorf("get post create output: %w", err)
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}
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poller(states)
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}
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}
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}
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func getPostCreateOutput(ctx context.Context, tunnelPort int, codespace *api.Codespace, user string) ([]PostCreateState, error) {
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cmd, err := NewRemoteCommand(
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ctx, tunnelPort, fmt.Sprintf("%s@localhost", user),
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"cat /workspaces/.codespaces/shared/postCreateOutput.json",
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)
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if err != nil {
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return nil, fmt.Errorf("remote command: %w", err)
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}
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stdout := new(bytes.Buffer)
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cmd.Stdout = stdout
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if err := cmd.Run(); err != nil {
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return nil, fmt.Errorf("run command: %w", err)
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}
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var output struct {
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Steps []PostCreateState `json:"steps"`
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}
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if err := json.Unmarshal(stdout.Bytes(), &output); err != nil {
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return nil, fmt.Errorf("unmarshal output: %w", err)
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}
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return output.Steps, nil
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}
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