api: introduce `Digest` field to `Artifact`

As discussed in RFC-0005, this introduces a `Digest` field to the
`Artifact` in favor of the now deprecated `Checksum`.

Signed-off-by: Hidde Beydals <hello@hidde.co>

api/v1beta2/artifact_types.go

@@ -43,9 +43,15 @@ type Artifact struct {
 	Revision string `json:"revision"`
 
 	// Checksum is the SHA256 checksum of the Artifact file.
+	// Deprecated, use Artifact.Digest instead.
 	// +optional
 	Checksum string `json:"checksum"`
 
+	// Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+	// +optional
+	// +kubebuilder:validation:Pattern="^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$"
+	Digest string `json:"digest"`
+
 	// LastUpdateTime is the timestamp corresponding to the last update of the
 	// Artifact.
 	// +required

config/crd/bases/source.toolkit.fluxcd.io_buckets.yaml

@@ -378,6 +378,11 @@ spec:
                 properties:
                   checksum:
                     description: Checksum is the SHA256 checksum of the Artifact file.
+                      Deprecated, use Artifact.Digest instead.
+                    type: string
+                  digest:
+                    description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+                    pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                     type: string
                   lastUpdateTime:
                     description: LastUpdateTime is the timestamp corresponding to

config/crd/bases/source.toolkit.fluxcd.io_gitrepositories.yaml

@@ -553,6 +553,11 @@ spec:
                 properties:
                   checksum:
                     description: Checksum is the SHA256 checksum of the Artifact file.
+                      Deprecated, use Artifact.Digest instead.
+                    type: string
+                  digest:
+                    description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+                    pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                     type: string
                   lastUpdateTime:
                     description: LastUpdateTime is the timestamp corresponding to
@@ -675,7 +680,12 @@ spec:
                   properties:
                     checksum:
                       description: Checksum is the SHA256 checksum of the Artifact
-                        file.
+                        file. Deprecated, use Artifact.Digest instead.
+                      type: string
+                    digest:
+                      description: Digest is the digest of the file in the form of
+                        '<algorithm>:<checksum>'.
+                      pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                       type: string
                     lastUpdateTime:
                       description: LastUpdateTime is the timestamp corresponding to

config/crd/bases/source.toolkit.fluxcd.io_helmcharts.yaml

@@ -453,6 +453,11 @@ spec:
                 properties:
                   checksum:
                     description: Checksum is the SHA256 checksum of the Artifact file.
+                      Deprecated, use Artifact.Digest instead.
+                    type: string
+                  digest:
+                    description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+                    pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                     type: string
                   lastUpdateTime:
                     description: LastUpdateTime is the timestamp corresponding to

config/crd/bases/source.toolkit.fluxcd.io_helmrepositories.yaml

@@ -370,6 +370,11 @@ spec:
                 properties:
                   checksum:
                     description: Checksum is the SHA256 checksum of the Artifact file.
+                      Deprecated, use Artifact.Digest instead.
+                    type: string
+                  digest:
+                    description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+                    pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                     type: string
                   lastUpdateTime:
                     description: LastUpdateTime is the timestamp corresponding to

config/crd/bases/source.toolkit.fluxcd.io_ocirepositories.yaml

@@ -196,6 +196,11 @@ spec:
                 properties:
                   checksum:
                     description: Checksum is the SHA256 checksum of the Artifact file.
+                      Deprecated, use Artifact.Digest instead.
+                    type: string
+                  digest:
+                    description: Digest is the digest of the file in the form of '<algorithm>:<checksum>'.
+                    pattern: ^[a-z0-9]+(?:[.+_-][a-z0-9]+)*:[a-zA-Z0-9=_-]+$
                     type: string
                   lastUpdateTime:
                     description: LastUpdateTime is the timestamp corresponding to