Add Cargo package registry (#21888)

This PR implements a [Cargo registry](https://doc.rust-lang.org/cargo/)
to manage Rust packages. This package type was a little bit more
complicated because Cargo needs an additional Git repository to store
its package index.

Screenshots:

![grafik](https://user-images.githubusercontent.com/1666336/203102004-08d812ac-c066-4969-9bda-2fed818554eb.png)

![grafik](https://user-images.githubusercontent.com/1666336/203102141-d9970f14-dca6-4174-b17a-50ba1bd79087.png)

![grafik](https://user-images.githubusercontent.com/1666336/203102244-dc05743b-78b6-4d97-998e-ef76341a978f.png)

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

1 files changed, 154 insertions, 0 deletions

diff --git a/services/packages/cleanup/cleanup.go b/services/packages/cleanup/cleanup.go
new file mode 100644
index 0000000000..2d62a028a4
--- /dev/null
+++ b/services/packages/cleanup/cleanup.go
@@ -0,0 +1,154 @@
+// Copyright 2022 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package container
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/models/db"
+	packages_model "code.gitea.io/gitea/models/packages"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	"code.gitea.io/gitea/modules/util"
+	packages_service "code.gitea.io/gitea/services/packages"
+	cargo_service "code.gitea.io/gitea/services/packages/cargo"
+	container_service "code.gitea.io/gitea/services/packages/container"
+)
+
+// Cleanup removes expired package data
+func Cleanup(taskCtx context.Context, olderThan time.Duration) error {
+	ctx, committer, err := db.TxContext(taskCtx)
+	if err != nil {
+		return err
+	}
+	defer committer.Close()
+
+	err = packages_model.IterateEnabledCleanupRules(ctx, func(ctx context.Context, pcr *packages_model.PackageCleanupRule) error {
+		select {
+		case <-taskCtx.Done():
+			return db.ErrCancelledf("While processing package cleanup rules")
+		default:
+		}
+
+		if err := pcr.CompiledPattern(); err != nil {
+			return fmt.Errorf("CleanupRule [%d]: CompilePattern failed: %w", pcr.ID, err)
+		}
+
+		olderThan := time.Now().AddDate(0, 0, -pcr.RemoveDays)
+
+		packages, err := packages_model.GetPackagesByType(ctx, pcr.OwnerID, pcr.Type)
+		if err != nil {
+			return fmt.Errorf("CleanupRule [%d]: GetPackagesByType failed: %w", pcr.ID, err)
+		}
+
+		for _, p := range packages {
+			pvs, _, err := packages_model.SearchVersions(ctx, &packages_model.PackageSearchOptions{
+				PackageID:  p.ID,
+				IsInternal: util.OptionalBoolFalse,
+				Sort:       packages_model.SortCreatedDesc,
+				Paginator:  db.NewAbsoluteListOptions(pcr.KeepCount, 200),
+			})
+			if err != nil {
+				return fmt.Errorf("CleanupRule [%d]: SearchVersions failed: %w", pcr.ID, err)
+			}
+			versionDeleted := false
+			for _, pv := range pvs {
+				if pcr.Type == packages_model.TypeContainer {
+					if skip, err := container_service.ShouldBeSkipped(ctx, pcr, p, pv); err != nil {
+						return fmt.Errorf("CleanupRule [%d]: container.ShouldBeSkipped failed: %w", pcr.ID, err)
+					} else if skip {
+						log.Debug("Rule[%d]: keep '%s/%s' (container)", pcr.ID, p.Name, pv.Version)
+						continue
+					}
+				}
+
+				toMatch := pv.LowerVersion
+				if pcr.MatchFullName {
+					toMatch = p.LowerName + "/" + pv.LowerVersion
+				}
+
+				if pcr.KeepPatternMatcher != nil && pcr.KeepPatternMatcher.MatchString(toMatch) {
+					log.Debug("Rule[%d]: keep '%s/%s' (keep pattern)", pcr.ID, p.Name, pv.Version)
+					continue
+				}
+				if pv.CreatedUnix.AsLocalTime().After(olderThan) {
+					log.Debug("Rule[%d]: keep '%s/%s' (remove days)", pcr.ID, p.Name, pv.Version)
+					continue
+				}
+				if pcr.RemovePatternMatcher != nil && !pcr.RemovePatternMatcher.MatchString(toMatch) {
+					log.Debug("Rule[%d]: keep '%s/%s' (remove pattern)", pcr.ID, p.Name, pv.Version)
+					continue
+				}
+
+				log.Debug("Rule[%d]: remove '%s/%s'", pcr.ID, p.Name, pv.Version)
+
+				if err := packages_service.DeletePackageVersionAndReferences(ctx, pv); err != nil {
+					return fmt.Errorf("CleanupRule [%d]: DeletePackageVersionAndReferences failed: %w", pcr.ID, err)
+				}
+
+				versionDeleted = true
+			}
+
+			if versionDeleted {
+				if pcr.Type == packages_model.TypeCargo {
+					owner, err := user_model.GetUserByID(ctx, pcr.OwnerID)
+					if err != nil {
+						return fmt.Errorf("GetUserByID failed: %w", err)
+					}
+					if err := cargo_service.AddOrUpdatePackageIndex(ctx, owner, owner, p.ID); err != nil {
+						return fmt.Errorf("CleanupRule [%d]: cargo.AddOrUpdatePackageIndex failed: %w", pcr.ID, err)
+					}
+				}
+			}
+		}
+		return nil
+	})
+	if err != nil {
+		return err
+	}
+
+	if err := container_service.Cleanup(ctx, olderThan); err != nil {
+		return err
+	}
+
+	ps, err := packages_model.FindUnreferencedPackages(ctx)
+	if err != nil {
+		return err
+	}
+	for _, p := range ps {
+		if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypePackage, p.ID); err != nil {
+			return err
+		}
+		if err := packages_model.DeletePackageByID(ctx, p.ID); err != nil {
+			return err
+		}
+	}
+
+	pbs, err := packages_model.FindExpiredUnreferencedBlobs(ctx, olderThan)
+	if err != nil {
+		return err
+	}
+
+	for _, pb := range pbs {
+		if err := packages_model.DeleteBlobByID(ctx, pb.ID); err != nil {
+			return err
+		}
+	}
+
+	if err := committer.Commit(); err != nil {
+		return err
+	}
+
+	contentStore := packages_module.NewContentStore()
+	for _, pb := range pbs {
+		if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
+			log.Error("Error deleting package blob [%v]: %v", pb.ID, err)
+		}
+	}
+
+	return nil
+}