Fix retrieving manifest for single platform

docker.sh

@@ -17,17 +17,23 @@ get_manifests() {
     local digest=$2
     local token=$3
 
-    manifest_list=$(curl -sSL -H "Authorization: Bearer $token" \
-        -H "Accept: application/vnd.docker.distribution.manifest.list.v2+json,application/vnd.oci.image.index.v1+json" \
+    manifest_list=$(curl -sSL -w "{\"digest\": \"%header{docker-content-digest}\", \"type\": \"%header{content-type}\"}" -H "Authorization: Bearer $token" \
+        -H "Accept: application/vnd.docker.distribution.manifest.list.v2+json,application/vnd.oci.image.index.v1+json,application/vnd.docker.distribution.manifest.v2+json" \
         "https://index.docker.io/v2/${repo}/manifests/${digest}" 2>/dev/null)
 
-    if jq -e -r '.errors[0].code' <<<"$manifest_list" >/dev/null; then
-        error_code=$(jq -r '.errors[0].code' <<<"$manifest_list")
-        message=$(jq -r '.errors[0].message' <<<"$manifest_list")
+    if jq -e -sr '.[0].errors[0].code' <<<"$manifest_list" >/dev/null; then
+        error_code=$(jq -sr '.[0].errors[0].code' <<<"$manifest_list")
+        message=$(jq -sr '.[0].errors[0].message' <<<"$manifest_list")
         error "Response from $repo\n code: $error_code\n message: $message"
     fi
 
-    jq -r '[.manifests[] | select(.platform.architecture | contains ("unknown") | not) | {digest: .digest, platform: (.platform.os +"/"+ .platform.architecture)}]' <<<"$manifest_list"
+    manifest_v2=$(jq -sr '.[1] | select(.type == "application/vnd.docker.distribution.manifest.v2+json") | [{digest: .digest, platform: "linux/amd64"}]' <<<"$manifest_list")
+    if [ ! -z "$manifest_v2" ]; then
+        echo "$manifest_v2"
+        return
+    fi
+
+    jq -sr '[.[0].manifests[] | select(.platform.architecture | contains ("unknown") | not) | {digest: .digest, platform: (.platform.os +"/"+ .platform.architecture)}]' <<<"$manifest_list"
 
 }
 
@@ -37,7 +43,7 @@ get_layers() {
     local token=$3
 
     digestOutput=$(curl -sSL -H "Authorization: Bearer $token" \
-        -H "Accept: application/vnd.docker.distribution.manifest.v1+json,application/vnd.oci.image.manifest.v1+json" \
+        -H "Accept: application/vnd.docker.distribution.manifest.v2+json,application/vnd.oci.image.manifest.v1+json" \
         "https://index.docker.io/v2/${repo}/manifests/${digest}" 2>/dev/null)
 
     if jq -e -r '.errors[0].code' <<<"$digestOutput" >/dev/null; then
@@ -102,7 +108,7 @@ manifests_image=$(get_manifests $image_repo ${image_tag:-latest} $image_token)
 
 diff=false
 # loop through plafforms split by comma
-for platform in $(echo $platforms | tr ',' ' '); do
+for platform in $(echo $platforms | tr -s ',' ' '); do
     # get the digest for the platform
     digest_base=$(jq -r ".[] | select(.platform == \"$platform\") | .digest" <<<"$manifests_base")