[Raised on Forgejo](https://codeberg.org/forgejo/forgejo/issues/8803): when a runner is registered with spaces in the comma-separated label list, eg. ` "docker:docker://node:22-bookworm, self-hosted:host, lxc:lxc://debian:bookworm"`, the runner will currently get the labels `"docker"`, `" self-hosted"`, and `" lxc"` which causes unexpected confusion. Forgejo doesn't display the labels usefully, and targeting the runner with `runs-on` in an action would require an unexpected quoting (eg. `runs-on: " lxc"`).
As an alternative to fixing this in Forgejo's label display, two changes are present here:
- When registering labels via the CLI `--labels` option, or the interactive registering, automatically strip spaces around the commas in the comma-separated list.
- **Breaking**: During startup of the runner, label names that start/end with a space will be considered invalid, resulting in a logged error and the label being ignored:
```
WARN[2025-08-08T21:00:13-06:00] ignored invalid label " debian-latest:docker://node:current-bookworm" error="invalid label \" debian-latest\": starting or ending with a space is invalid"
```
This is a breaking change in behavior in the case that someone has registered a runner with spaces and modified their activities to use them after recognizing the problem. But I tend to think it's more likely that this change will *highlight* a misconfiguration and help someone fix it.
<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
- [PR](https://code.forgejo.org/forgejo/runner/pulls/829): <!--number 829 --><!--line 0 --><!--description Zml4OiBwcmV2ZW50IHNwYWNlIHByZWZpeC9zdWZmaXggaW4gcnVubmVyIGxhYmVscw==-->fix: prevent space prefix/suffix in runner labels<!--description-->
<!--end release-notes-assistant-->
Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/829
Reviewed-by: Gusted <gusted@noreply.code.forgejo.org>
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Co-authored-by: Mathieu Fenniak <mathieu@fenniak.net>
Co-committed-by: Mathieu Fenniak <mathieu@fenniak.net>
- Removed `deadcode`, `structcheck`, and `varcheck` linters from `.golangci.yml`
- Fixed a typo in a comment in `daemon.go`
- Renamed `defaultActionsUrl` to `defaultActionsURL` in `exec.go`
- Removed unnecessary else clause in `exec.go` and `runner.go`
- Simplified variable initialization in `exec.go`
- Changed function name from `getHttpClient` to `getHTTPClient` in `http.go`
- Removed unnecessary else clause in `labels_test.go`
Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Reviewed-on: https://gitea.com/gitea/act_runner/pulls/289
Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Co-committed-by: Bo-Yi Wu <appleboy.tw@gmail.com>
