Fix wrong fetching semver latest tag (#10)

entrypoint.sh

@@ -8,20 +8,21 @@ git fetch --prune --unshallow
 latest_tag=''
 
 if [ "${INPUT_SEMVER_ONLY}" = 'false' ]; then
-    # Get a actual latest tag.
-    latest_tag=$(git describe --abbrev=0 --tags)
+  # Get a actual latest tag.
+  latest_tag=$(git describe --abbrev=0 --tags)
 else
-    # Get a latest tag in the shape of semver.
-    for tag in $(git tag | sort -r); do
-        if echo "${tag}" | grep -Eq '^v?([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+[0-9A-Za-z-]+)?$'; then
-            latest_tag="${tag}"
-            break
-        fi
-    done
+  # Get a latest tag in the shape of semver.
+  for ref in $(git for-each-ref --sort=-creatordate --format '%(refname)' refs/tags); do
+    tag="${ref#refs/tags/}"
+    if echo "${tag}" | grep -Eq '^v?([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+[0-9A-Za-z-]+)?$'; then
+      latest_tag="${tag}"
+      break
+    fi
+  done
 fi
 
 if [ "${latest_tag}" = '' ] && [ "${INPUT_WITH_INITIAL_VERSION}" = 'true' ]; then
-    latest_tag="${INPUT_INITIAL_VERSION}"
+  latest_tag="${INPUT_INITIAL_VERSION}"
 fi
 
 echo "::set-output name=tag::${latest_tag}"