Problem

Coder version 2.18.5

When building a template that uses an external log source (e.g. envbuilder), we can observe the following:

• During build process, logs increment normally to $LAST_LOG_ID up until the build completes.
• When build process complete, logs increment to a multiple of $LAST_LOG_ID, giving the mistaken impression that the build is occurring multiple times. It appears as a large "dump" of logs all at once in the UI.

• If you hit the workspace agent build logs endpoint directly (http://$CODER/api/v2/workspaceagents/$AGENT_ID/logs), the correct number of logs is shown, with no duplicate entries.

First log ID:

Last log ID:

• After a refresh of the page, the build logs drawer shows the correct number of logs:

• It appears that the UI is performing multiple WS requests for the build logs and simply appending them to the log panel:

Steps to reproduce:

• Either use docker-compose or lima to set up a fresh Coder instance
• Import the Devcontainers (Docker) template and use the defaults.
• Create a new workspace and select one of the pre-defined options (reproduced using home-assistant repo)
  • Important: before starting the build, open the DevTools, switch to "Network", and filter "all requests" by "logs".
• Wait for build to complete without refreshing the UI, and observe the last number in the build logs.

Proposed Solution

Each log entry has a unique identifier (id) that can be used to de-duplicate in the logs pane.
If it's not possible to avoid the multiple requests, maybe this could be used to de-duplicate?