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Add mcrctl purge command for tag retention

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Client-side purge that keeps the last N tags per repository (excluding
latest) and deletes older manifests. Uses existing MCR APIs — no new
server RPCs needed.

Server-side: added updated_at to TagInfo struct and GetRepositoryDetail
query so tags can be sorted by recency.

Usage: mcrctl purge --keep 3 --dry-run --gc

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Kyle Isom
2026-03-27 01:42:28 -07:00
parent 078dd39052
commit 296bbc5357
7 changed files with 1156 additions and 221 deletions
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9
internal/db/admin.go
View File

@@ -23,8 +23,9 @@ type RepoMetadata struct {
// TagInfo is a tag with its manifest digest for repo detail.
type TagInfo struct {
Name string `json:"name"`
Digest string `json:"digest"`
Name string `json:"name"`
Digest string `json:"digest"`
UpdatedAt string `json:"updated_at"`
}
// ManifestInfo is a manifest summary for repo detail.
@@ -112,7 +113,7 @@ func (d *DB) GetRepositoryDetail(name string) (*RepoDetail, error) {
// Tags with manifest digests.
tagRows, err := d.Query(
`SELECT t.name, m.digest
`SELECT t.name, m.digest, t.updated_at
FROM tags t JOIN manifests m ON m.id = t.manifest_id
WHERE t.repository_id = ?
ORDER BY t.name ASC`, repoID,
@@ -124,7 +125,7 @@ func (d *DB) GetRepositoryDetail(name string) (*RepoDetail, error) {
for tagRows.Next() {
var ti TagInfo
if err := tagRows.Scan(&ti.Name, &ti.Digest); err != nil {
if err := tagRows.Scan(&ti.Name, &ti.Digest, &ti.UpdatedAt); err != nil {
return nil, fmt.Errorf("db: scan tag: %w", err)
}
detail.Tags = append(detail.Tags, ti)

5
internal/grpcserver/registry.go
View File

@@ -78,8 +78,9 @@ func (s *registryService) GetRepository(_ context.Context, req *pb.GetRepository
}
for _, t := range detail.Tags {
resp.Tags = append(resp.Tags, &pb.TagInfo{
Name: t.Name,
Digest: t.Digest,
Name: t.Name,
Digest: t.Digest,
UpdatedAt: t.UpdatedAt,
})
}
for _, m := range detail.Manifests {