ca0f89d3bc
The Cobra commands are now a light wrapper around the App struct. Co-authored-by: Jose Garcia <josebalius@github.com>
105 lines
3 KiB
Go
105 lines
3 KiB
Go
package ghcs
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import (
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"context"
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"fmt"
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"net"
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"github.com/github/ghcs/internal/codespaces"
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"github.com/github/ghcs/internal/liveshare"
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"github.com/spf13/cobra"
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)
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func newSSHCmd(app *App) *cobra.Command {
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var sshProfile, codespaceName string
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var sshServerPort int
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sshCmd := &cobra.Command{
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Use: "ssh [flags] [--] [ssh-flags] [command]",
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Short: "SSH into a codespace",
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RunE: func(cmd *cobra.Command, args []string) error {
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return app.SSH(cmd.Context(), args, sshProfile, codespaceName, sshServerPort)
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},
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}
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sshCmd.Flags().StringVarP(&sshProfile, "profile", "", "", "Name of the SSH profile to use")
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sshCmd.Flags().IntVarP(&sshServerPort, "server-port", "", 0, "SSH server port number (0 => pick unused)")
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sshCmd.Flags().StringVarP(&codespaceName, "codespace", "c", "", "Name of the codespace")
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return sshCmd
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}
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// SSH opens an ssh session or runs an ssh command in a codespace.
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func (a *App) SSH(ctx context.Context, sshArgs []string, sshProfile, codespaceName string, localSSHServerPort int) (err error) {
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// Ensure all child tasks (e.g. port forwarding) terminate before return.
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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user, err := a.apiClient.GetUser(ctx)
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if err != nil {
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return fmt.Errorf("error getting user: %w", err)
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}
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authkeys := make(chan error, 1)
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go func() {
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authkeys <- checkAuthorizedKeys(ctx, a.apiClient, user.Login)
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}()
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codespace, token, err := getOrChooseCodespace(ctx, a.apiClient, user, codespaceName)
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if err != nil {
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return fmt.Errorf("get or choose codespace: %w", err)
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}
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session, err := codespaces.ConnectToLiveshare(ctx, a.logger, a.apiClient, user.Login, token, codespace)
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if err != nil {
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return fmt.Errorf("error connecting to Live Share: %w", err)
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}
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defer safeClose(session, &err)
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if err := <-authkeys; err != nil {
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return err
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}
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a.logger.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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usingCustomPort := localSSHServerPort != 0 // suppress log of command line in Shell
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// Ensure local port is listening before client (Shell) connects.
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listen, err := net.Listen("tcp", fmt.Sprintf(":%d", localSSHServerPort))
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if err != nil {
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return err
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}
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defer listen.Close()
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localSSHServerPort = listen.Addr().(*net.TCPAddr).Port
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connectDestination := sshProfile
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if connectDestination == "" {
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connectDestination = fmt.Sprintf("%s@localhost", sshUser)
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}
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a.logger.Println("Ready...")
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tunnelClosed := make(chan error, 1)
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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) // always non-nil
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}()
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shellClosed := make(chan error, 1)
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go func() {
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shellClosed <- codespaces.Shell(ctx, a.logger, sshArgs, localSSHServerPort, connectDestination, usingCustomPort)
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}()
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select {
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case err := <-tunnelClosed:
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return fmt.Errorf("tunnel closed: %w", err)
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case err := <-shellClosed:
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if err != nil {
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return fmt.Errorf("shell closed: %w", err)
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}
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return nil // success
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}
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}
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