Add install protoc home script and update utils for os x support

base/.local/share/buddy-up/includes/utils.sh

@@ -46,10 +46,11 @@ set_current_link () {
     version="${2}"
     sudo="${3}"
     current="${prefix}/current"
-    if [ -s "${current}" ] ; then
+    if [ -L "${current}" ] ; then
         $sudo unlink "${current}"
     fi
-    $sudo ln --symbolic --relative "${prefix}/${version}" "${current}"
+    rel="$(relative_path "${prefix}" "${prefix}/${version}")"
+    $sudo ln -s "$rel" "${current}"
 }
 
 extract_tarball () {

install-scripts/.local/bin/install-protoc-home

@@ -0,0 +1,48 @@
+#!/usr/bin/env bash
+
+set -x
+set -e
+
+# shellcheck disable=SC1090
+source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
+
+VERSION=${VERSION:-3.15.6}
+APP=protoc
+APPS_DIR=${XDG_DATA_HOME}/buddy-up/apps/${APP}
+VER_DIR=${APPS_DIR}/${VERSION}
+
+OS=$(get_os)
+if [[ $OS == darwin ]]; then
+    OS=osx
+fi
+
+ARCH=$(get_arch)
+if [[ $ARCH == amd64 ]]; then
+    ARCH=x86_64
+fi
+
+ZIP=protoc-${VERSION}-${OS}-${ARCH}.zip
+TMP_DIR=$(mktemp -d)
+DEST_FILE=$TMP_DIR/$ZIP
+URL=https://github.com/protocolbuffers/protobuf/releases/download/v${VERSION}/${ZIP}
+
+if [[ ! -d "${VER_DIR}" ]]; then
+    curl --output "${DEST_FILE}" --location "${URL}"
+    unzip -o "${DEST_FILE}" -d "${VER_DIR}"
+    find "${VER_DIR}" -type f -exec chmod 644 {} \;
+    find "${VER_DIR}" -type d -exec chmod 755 {} \;
+    find "${VER_DIR}/bin" -type f -exec chmod 755 {} \;
+fi
+rm -rfv "$TMP_DIR"
+
+set_current_link "${APPS_DIR}" "${VERSION}"
+
+apps=$(find "${APPS_DIR}/current/bin" -maxdepth 1 -perm +111 -type f -exec basename {} \;)
+cd "${XDG_BIN_HOME}"
+for bin in $apps; do
+    if [[ ! -s $bin ]]; then
+        ln -s \
+            "$(relative_path "${XDG_BIN_HOME}" "${APPS_DIR}/current/bin/${bin}")" \
+            "${bin}"
+    fi
+done