swaywm/sway

swaybar shows multiple status lines at once

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#4,496 opened on Aug 25, 2019

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good first issue

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Description

  • Sway Version:

sway version 1.2-rc2 (Aug 23 2019, Arch Linux)

  • Configuration File:
bar {
    status_command tail -f ~/sway-status.txt
}

When status command initially immediately outputs multiple lines, they all are shown on the swaybar. When after that the command outputs more lines, only the last line is shown.

Swaybar should always display only the last status line.

To reproduce, create a file ~/sway-status.txt with multiple short lines of text. Set status_command to output that file:

swaymsg bar bar-0 status_command "tail -f ~/sway-status.txt"

Contributor guide

Research direction
Examine how swaybar processes the initial output of the status command; it likely reads all lines at once instead of only the last line. Look at the code that reads from the status command pipe and updates the bar display.
Tech stack
c
Domain
backenddesktop
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50