simplify script

scripts/cipublish

@@ -61,28 +61,26 @@ function install_oras() {
 }
 
 function deprecate_image() {
-    local full_image_name=$1
-    local previous_full_image_digest=$(az acr manifest show-metadata $full_image_name | jq -r .digest)
-    deprecated_since=$(date --iso-8601=seconds) 
-    echo "Deprecating previous image $full_image_name@$previous_full_image_digest"
+    local full_image_name_with_digest=$1
+    deprecated_since=$(date --utc --iso-8601=seconds) 
+    echo "Deprecating previous image $full_image_name_with_digest"
     oras attach \
         --artifact-type "application/vnd.microsoft.artifact.lifecycle" \
         --annotation "vnd.microsoft.artifact.lifecycle.end-of-life.date=$deprecated_since" \
-        "$full_image_name@$previous_full_image_digest"
+        "$full_image_name_with_digest"
 }
 
 function set_lineage() {
-    local full_image_name=$1
-    local new_image_digest=$(az acr manifest show-metadata $full_image_name | jq -r .digest)
+    local full_image_name_with_digest=$1
     # if the annotation already exists, do not add it again
-    if oras discover $full_image_name@$new_image_digest -o json | jq '.manifests[].annotations."vnd.microsoft.artifact.lineage.rolling-tag"' | grep -q $IMAGE_TAG; then
+    if oras discover $full_image_name_with_digest -o json | jq '.manifests[].annotations."vnd.microsoft.artifact.lineage.rolling-tag"' | grep -q $IMAGE_TAG; then
         echo "Lineage annotation for $IMAGE_TAG already exists, skip."
     else
-        echo "Adding $full_image_name@$new_image_digest to lineage $IMAGE_TAG"
+        echo "Adding $full_image_name_with_digest to lineage $IMAGE_TAG"
         oras attach \
             --artifact-type "application/vnd.microsoft.artifact.lineage" \
             --annotation "vnd.microsoft.artifact.lineage.rolling-tag=$IMAGE_TAG" \
-            "$full_image_name@$new_image_digest"
+            "$full_image_name_with_digest"
     fi
 }
 
@@ -97,15 +95,16 @@ function publish_image() {
     if [ "$local_image_digest" != "$remote_image_digest" ]; then
         # Image rolling tag exists in the registry, update the end-of-life
         # annotation for the existing image.
-        deprecate_image $full_image_name
+        deprecate_image "$full_image_name@$remote_image_digest"
     else
         echo "No changes, licycle metadata annotation will not be attached."
     fi
 
     echo "Publishing ${local_image} to ${full_image_name}"
     docker tag "${local_image}" "${full_image_name}"
     docker push "${full_image_name}"
-    set_lineage $full_image_name
+    local remote_image_digest=$(az acr manifest show-metadata $full_image_name | jq -r .digest)
+    set_lineage "$full_image_name@$remote_image_digest"
 }
 
 if [ "${BASH_SOURCE[0]}" = "${0}" ]; then