chore(util) minor usage fix and style cohesion for scripts

Properly show the usage message on:

    $ util/sdk.sh -S
    $ util/runtime.sh -R

Author: thibaultcha

util/runtime.sh

@@ -111,7 +111,7 @@ while [[ "$1" ]]; do
             exit 0
             ;;
     esac
-    shift
+    shift || true
 done
 
 if [[ -z "$RUNTIME" ]]; then

util/runtimes/wasmer.sh

@@ -157,6 +157,7 @@ clean="$5"
 
 if [ "$mode" = "download" ]; then
     download_wasmer "$target" "$version" "$arch" "$clean"
+
 else
     build_wasmer "$target" "$version" "$arch" "$clean"
 fi

util/runtimes/wasmtime.sh

@@ -142,6 +142,7 @@ clean="$5"
 
 if [ "$mode" = "download" ]; then
     download_wasmtime "$target" "$version" "$arch" "$clean"
+
 else
     build_wasmtime "$target" "$version" "$arch" "$clean"
 fi

util/sdk.sh

@@ -83,7 +83,7 @@ while [[ "$1" ]]; do
             exit 0
             ;;
     esac
-    shift
+    shift || true
 done
 
 if [[ -z "$PROXY_WASM_SDK" ]]; then

util/sdks/assemblyscript.sh

@@ -29,6 +29,7 @@ download_assemblyscript_sdk() {
             git fetch --tags
             git reset --hard "v$version"
         popd
+
     else
         notice "cloning proxy-wasm-assemblyscript-sdk repository, version ${version}..."
         git clone \
@@ -50,6 +51,7 @@ build_assemblyscript_sdk() {
 
     if [[ ! -d "$DIR_PROXY_WASM_ASSEMBLYSCRIPT_SDK" ]]; then
         download_assemblyscript_sdk $version
+
     else
         local cur_version=$(cd $DIR_PROXY_WASM_ASSEMBLYSCRIPT_SDK && git describe --tags)
 
@@ -97,6 +99,7 @@ clean="$3"
 
 if [ "$mode" = "download" ]; then
     download_assemblyscript_sdk "$version" "$clean"
+
 else
     build_assemblyscript_sdk "$version" "$clean"
 fi

util/setup_dev.sh

@@ -152,6 +152,7 @@ if [[ -d "$DIR_NGX_ECHO_MODULE" ]]; then
         git fetch
         git reset --hard origin/master
     popd
+
 else
     notice "cloning the echo-nginx-module repository..."
     git clone https://github.com/openresty/echo-nginx-module.git $DIR_NGX_ECHO_MODULE
@@ -163,6 +164,7 @@ if [[ -d "$DIR_NGX_HEADERS_MORE_MODULE" ]]; then
         git fetch
         git reset --hard origin/master
     popd
+
 else
     notice "cloning the headers-more-nginx-module repository..."
     git clone https://github.com/openresty/headers-more-nginx-module.git $DIR_NGX_HEADERS_MORE_MODULE
@@ -174,6 +176,7 @@ if [[ -d "$DIR_MOCKEAGAIN" ]]; then
         git fetch
         git reset --hard origin/master
     popd
+
 else
     notice "cloning the mockeagain repository..."
     git clone https://github.com/openresty/mockeagain.git $DIR_MOCKEAGAIN