add fallback logic to continue working for installing older versions

Author: dschaaff

install-binary.sh

@@ -70,15 +70,17 @@ verifySupported() {
 # getDownloadURL checks the latest available version.
 getDownloadURL() {
   version=$(git -C "$HELM_PLUGIN_DIR" describe --tags --exact-match 2>/dev/null || :)
-  if [ -n "$version" ]; then
+  if [ -n "$version" ] && [ "$version" -ge "3.1.3" ]; then
     DOWNLOAD_URL="https://github.com/$PROJECT_GH/releases/download/$version/helm-diff-$OS-$ARCH.tgz"
+  elif [ -n "$version" ]; then
+    DOWNLOAD_URL="https://github.com/$PROJECT_GH/releases/download/$version/helm-diff-$OS.tgz"
   else
     # Use the GitHub API to find the download url for this project.
     url="https://api.github.com/repos/$PROJECT_GH/releases/latest"
     if type "curl" >/dev/null; then
-      DOWNLOAD_URL=$(curl -s $url | grep $OS | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
+      DOWNLOAD_URL=$(curl -s $url | grep $OS | grep $ARCH | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
     elif type "wget" >/dev/null; then
-      DOWNLOAD_URL=$(wget -q -O - $url | grep $OS | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
+      DOWNLOAD_URL=$(wget -q -O - $url | grep $OS | grep $ARCH | awk '/\"browser_download_url\":/{gsub( /[,\"]/,"", $2); print $2}')
     fi
   fi
 }