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

@@ -43,8 +43,14 @@ 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"`
+	Checksum string `json:"checksum,omitempty"`
+
+	// 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.

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

@@ -377,7 +377,12 @@ spec:
                 description: Artifact represents the last successful Bucket reconciliation.
                 properties:
                   checksum:
-                    description: Checksum is the SHA256 checksum of the Artifact file.
+                    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

@@ -554,7 +554,12 @@ spec:
                   reconciliation.
                 properties:
                   checksum:
-                    description: Checksum is the SHA256 checksum of the Artifact file.
+                    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
@@ -676,8 +681,13 @@ spec:
                   description: Artifact represents the output of a Source reconciliation.
                   properties:
                     checksum:
-                      description: Checksum is the SHA256 checksum of the Artifact
-                        file.
+                      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_helmcharts.yaml

@@ -452,7 +452,12 @@ spec:
                   reconciliation.
                 properties:
                   checksum:
-                    description: Checksum is the SHA256 checksum of the Artifact file.
+                    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

@@ -369,7 +369,12 @@ spec:
                   reconciliation.
                 properties:
                   checksum:
-                    description: Checksum is the SHA256 checksum of the Artifact file.
+                    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

@@ -195,7 +195,12 @@ spec:
                   OCI Repository sync.
                 properties:
                   checksum:
-                    description: Checksum is the SHA256 checksum of the Artifact file.
+                    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

docs/api/source.md

@@ -1253,7 +1253,20 @@ string
 </td>
 <td>
 <em>(Optional)</em>
-<p>Checksum is the SHA256 checksum of the Artifact file.</p>
+<p>Checksum is the SHA256 checksum of the Artifact file.
+Deprecated: use Artifact.Digest instead.</p>
+</td>
+</tr>
+<tr>
+<td>
+<code>digest</code><br>
+<em>
+string
+</em>
+</td>
+<td>
+<em>(Optional)</em>
+<p>Digest is the digest of the file in the form of &lsquo;<algorithm>:<checksum>&rsquo;.</p>
 </td>
 </tr>
 <tr>