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fix: avoid 'filename too long' on matrix jobs by hashing container names (#853)

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## Bug fixes

- Fixed "file name too long" errors when running matrix jobs with many or
  long-valued matrix parameters. Docker volume and container names are now
  bounded to a safe length by hashing the full name with SHA-256, keeping
  the result well within the filesystem `NAME_MAX` limit (255 bytes) even
  after Docker appends its own suffixes (`-env`, `-network`, etc.).

## Upgrade notes

This change renames the Docker containers, volumes and networks created by
the runner. Resources created by a previous version will **not** be cleaned
up automatically after upgrade and will become orphans.

After upgrading, you can remove the legacy resources with:

```sh
# volumes
docker volume ls -q | grep -E '^GITEA-ACTIONS-TASK-[0-9]+_' | xargs -r docker volume rm

# networks
docker network ls --format '{{.Name}}' | grep -E '^GITEA-ACTIONS-TASK-[0-9]+_.*-network$' | xargs -r docker network rm
```

> **Note:** If multiple act_runner instances share the same Docker daemon,
> make sure no runner using the old version is running before executing the
> cleanup commands above.

Fixes #686

---------

Co-authored-by: Nicolas <bircni@icloud.com>
Reviewed-on: https://gitea.com/gitea/act_runner/pulls/853
Reviewed-by: silverwind <2021+silverwind@noreply.gitea.com>
Co-authored-by: Morgan Peyre <195218+peyremorgan@noreply.gitea.com>
Co-committed-by: Morgan Peyre <195218+peyremorgan@noreply.gitea.com>
This commit is contained in:
Morgan Peyre
2026-04-28 00:30:27 +00:00
committed by silverwind
parent 3f05040438
commit 801e5cf4d5
4 changed files with 15 additions and 40 deletions
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20
act/runner/run_context.go
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@@ -101,8 +101,7 @@ func (rc *RunContext) jobContainerName() string {
if rc.caller != nil {
nameParts = append(nameParts, "CALLED-BY-"+rc.caller.runContext.JobName)
}
// return createSimpleContainerName(rc.Config.ContainerNamePrefix, "WORKFLOW-"+rc.Run.Workflow.Name, "JOB-"+rc.Name)
return createSimpleContainerName(nameParts...) // For Gitea
return createContainerName(nameParts...) // For Gitea
}
// networkNameForGitea return the name of the network
@@ -769,7 +768,6 @@ func mergeMaps(maps ...map[string]string) map[string]string {
return rtnMap
}
// Deprecated: use createSimpleContainerName
func createContainerName(parts ...string) string {
name := strings.Join(parts, "-")
pattern := regexp.MustCompile("[^a-zA-Z0-9]")
@@ -783,22 +781,6 @@ func createContainerName(parts ...string) string {
return fmt.Sprintf("%s-%x", trimmedName, hash)
}
func createSimpleContainerName(parts ...string) string {
pattern := regexp.MustCompile("[^a-zA-Z0-9-]")
name := make([]string, 0, len(parts))
for _, v := range parts {
v = pattern.ReplaceAllString(v, "-")
v = strings.Trim(v, "-")
for strings.Contains(v, "--") {
v = strings.ReplaceAll(v, "--", "-")
}
if v != "" {
name = append(name, v)
}
}
return strings.Join(name, "_")
}
func trimToLen(s string, l int) string {
if l < 0 {
l = 0