ostree-summary man page
ostree-summary — Regenerate the summary metadata file
ostree summary [Options...]
The summary file is an optional higher level form of repository metadata that describes the available branches. It needs to be manually regenerated after a series of commits. Among other things, this allows atomically updating multiple commits.
Update the summary file.
Any additional arguments to the command are treated as additional key–value pairs to be added to the summary file as additional metadata. They must be in the format KEY=VALUE or as two separate arguments. The keys must be namespaced for your organisation or repository using a dot prefix. The values must be in GVariant text format. For example, exampleos.end-of-life "@t 1445385600".
GPG Key ID to sign the summary with.
GPG Homedir to use when looking for keyrings.