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docs/runner-docs_versioned_docs/version-5/hooks/post-task-script.md
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silverwind be6aefc7e8 Simplify the runner docs and fix their outdated facts (#600)
The runner pages had drifted from the runner. They claimed Podman is unsupported, a registration retry limit of 10, a `container.env` proxy override that has no effect, and they used the deprecated `generate-config` command, while the actual instructions were buried under implementation details.

The develop and 5.x pages are rewritten from the current runner sources (`main` is `v5.2.0`). They are shorter and aimed at operators, with a new page covering what jobs get. The reference generator now documents the `config` command, and the quickstart pages in every language use the `gitea-runner` binary name.

Reviewed-on: https://gitea.com/gitea/docs/pulls/600
Reviewed-by: Lunny Xiao <[email protected]>
Co-authored-by: silverwind <[email protected]>
2026-10-21 05:25:45 +00:00

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Post-task script

The post-task script runs on the runner's host after each job, once the runner has removed the job's containers. Use it for housekeeping such as pruning Docker images or freeing disk space.

runner:
  post_task_script: /usr/local/bin/gitea-post-task.sh
  post_task_script_timeout: 2m
#!/bin/sh
docker image prune -f
docker builder prune -f --filter 'until=24h'

The job's slot stays busy until the script exits. With capacity: 1, the runner accepts no new jobs while the script runs. The runner kills the script if it runs longer than post_task_script_timeout, which defaults to 5m. The runner also waits for the script during shutdown.

The runner writes the script's output to its own log, not to the job log. If the script exits with a non-zero status, the runner logs a warning without changing the job's result.

Environment

The script receives variables from runner.envs and runner.env_file, but not from the runner's own environment. Set PATH in one of these settings if the script needs it. The runner also sets these variables:

Variable Value
GITEA_TASK_ID The task ID
GITEA_RUN_ID The workflow run ID
GITEA_REPOSITORY The repository as owner/name
GITEA_WORKSPACE The job's workspace path, which may already be deleted
GITEA_JOB_RESULT success, failure, cancelled, skipped or unknown

Windows

The configured path must be an .exe, .bat or .cmd file. Wrap a PowerShell script in a batch file:

@echo off
powershell.exe -NoProfile -NonInteractive -ExecutionPolicy Bypass -File "%~dp0post-task.ps1"

For work inside the job environment, use job hooks.