Add linkerd install script

hellotech/.local/bin/install-linkerd-home

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+# shellcheck disable=SC1090
+source "${XDG_DATA_HOME}/buddy-up/includes/utils.sh"
+
+APP=linkerd
+VERSION=${VERSION:-stable-2.10.1}
+DATA_DIR="${XDG_DATA_HOME}/apps/releases"
+DEST_DIR="${DATA_DIR}/${APP}/${VERSION}"
+
+URL=
+if [[ $(get_os) == "linux" ]]; then
+	URL=https://github.com/linkerd/linkerd2/releases/download/${VERSION}/linkerd2-cli-${VERSION}-$(get_os)-$(get_arch)
+else
+	URL=https://github.com/linkerd/linkerd2/releases/download/${VERSION}/linkerd2-cli-${VERSION}-$(get_os)
+fi
+
+[[ -d "${DEST_DIR}" ]] || mkdir -p "${DEST_DIR}"
+
+if [[ ! -f "${DEST_DIR}/${APP}" ]]; then
+	temp_dir="$(mktemp -d)"
+	curl --location --output "$temp_dir/${APP}" "${URL}"
+	chmod 755 "$temp_dir/${APP}"
+	mv "$temp_dir/${APP}" "${DEST_DIR}/${APP}"
+fi
+
+cd "${DEST_DIR}/.." || exit 1
+if [[ -L current ]]; then
+	unlink current
+fi
+ln -s "${VERSION}" current
+cd - >/dev/null 2>/dev/null || exit 1
+
+if [[ -L "$XDG_BIN_HOME/${APP}" ]]; then
+	unlink "$XDG_BIN_HOME/${APP}"
+fi
+
+cd "$XDG_BIN_HOME" || exit 1
+REL_LINK="$(relative_path "${XDG_BIN_HOME}" "${DATA_DIR}/${APP}/current/${APP}")"
+ln -s "${REL_LINK}" "${APP}"