Update mmtcl download to account for Drat releases (#14363)

scripts/get_latest_release.sh

@@ -7,26 +7,13 @@
 REPO_TO_USE=$1
 BRANCH_TO_USE=$2
 
-BASIC_AUTH=""
+LATEST_REL=$(curl --silent "https://api.github.com/repos/$REPO_TO_USE/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
-
+DRAFT=$(curl --silent "https://api.github.com/repos/$REPO_TO_USE/releases/latest" | grep '"draft":' | sed -E 's/.*: ([^,]+).*/\1/')
-# If we find a github username and token, we use that.
-# In CI, these variables are available and useful to avoid rate limits which is
-# much more strict for unauthenticated requests.
-if [[ $GITHUB_USERNAME != "" && $GITHUB_TOKEN != "" ]];
-then
-	BASIC_AUTH="--user $GITHUB_USERNAME:$GITHUB_TOKEN"
-fi
-
-LATEST_REL=$(curl \
-	--silent \
-	$BASIC_AUTH \
-	"https://api.github.com/repos/$REPO_TO_USE/releases/latest" \
-	| grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
 
 # Check if this is a release branch
 THIS_BRANCH=$(git rev-parse --abbrev-ref HEAD)
 
-if [[ $(echo "$THIS_BRANCH" | grep -c ^"$BRANCH_TO_USE") == 1 ]];
+if [[ "$THIS_BRANCH" =~ $BRANCH_TO_USE || $DRAFT =~ "true" ]];
 then
     VERSION_REL=${THIS_BRANCH//$BRANCH_TO_USE/v}
     REL_TO_USE=$(curl --silent $BASIC_AUTH "https://api.github.com/repos/$REPO_TO_USE/releases" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | sed -n "/$VERSION_REL/p" | sort -rV | head -n 1)