Terminal widget is not displayed for theia tasks

[RomanNikitenko]

Describe the bug

Terminal widget works well for che tasks, but it is not displayed for theia tasks, so user can not see output for tasks with shell type, for example.

Che version

• latest
• nightly
• other: 7.0.0-rc-4.0-SNAPSHOT

Steps to reproduce

1. Create workspace using any stack from dashboard
2. Create tasks.json file in /projects/.theia directory
3. Add the content:

{
    "tasks": [
        {
            "label": "Run my test task",
            "type": "shell",
            "command": "./task-long-running"
        }
    ]
}

4. Create file task-long-running in /projects directory with content:

#!/bin/bash

for i in {1..5}
do
   sleep 1
   echo "tasking... $i"
done

5. Go to the terminal: chmod +x task-long-running
6. Go to Terminal => Run Task and run the task
7. You can see:

• message that task has been started
• the process is running (from terminal)
• in 5 sec message that task has exited
• but output is absent - terminal widget is not displayed
• error in browser console at creating terminal widget

Please see the video: https://youtu.be/hPgVKivYsoo

Expected behavior

Please see the video how it works for theia project: https://youtu.be/GiwqXal3Knc

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (minikube v1.0.0 on linux (amd64))
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl (chectl/0.0.2-6d3894f linux-x64 node-v10.4.1)
• che-operator
• minishift-addon
• I don't know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• other: please specify

Additional context

[vparfonov]

Will we cherry-pick eclipse-che/che-theia#365 to the 7.0.0 branch ?

[evidolob]

Yes eclipse-che/che-theia#368