act_runner does not expose the job's runs-on label to the workflow: v1.0.4
provides only RUNNER_OS/ARCH/TEMP/TOOL_CACHE/DEBUG/VERSION, verified against
the binary. The `$env:RUNNER_LABELS -match 'linux'` check was therefore always
false, so guest-os: 'Auto' silently resolved to Windows and selected the
Windows template for Linux jobs. It was masked only because every caller passes
guest-os explicitly or overrides template-path.
'Auto' cannot pick a template on its own -- the VMX guestOS field is only
readable after the clone -- so it now requires template-path and snapshot-name
and errors otherwise, instead of falling back to the wrong template.
Add GITEA_CI_LINUX_SNAPSHOT_NAME so a runner instance dedicated to a Linux
variant can declare its own snapshot instead of every workflow repeating it;
the Linux snapshot was hardcoded to BaseClean-Linux.
BREAKING: a workflow using the composite with neither guest-os nor
template-path now fails instead of silently using the Windows template.
Simone
7cca938a50