Add starship install script

starship/.local/bin/install-starship-home

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+APP=starship
+VERSION=${VERSION:-v0.47.0}
+DATA_DIR="${XDG_DATA_HOME}/apps/releases"
+DEST_DIR="${DATA_DIR}/${APP}/${VERSION}"
+
+OS=
+ARCH=
+case $(uname -s) in
+    Linux*)     OS=unknown-linux-gnu;;
+    Darwin*)    OS=apple-darwin;;
+    *)          >&2 echo "unsupported os"; return;
+esac
+
+case $(uname -m) in
+    x86_64*)    ARCH=x86_64;;
+    *)          >&2 echo "unsupported architecture: $(uname -m)"; exit 1;;
+esac
+
+URL="https://github.com/starship/starship/releases/download/${VERSION}/starship-${ARCH}-${OS}.tar.gz"
+TMP_DIR=
+if [[ ! -d "${DEST_DIR}" ]] ; then
+    TMP_DIR=$(mktemp --directory)
+    TAR_GZ="${TMP_DIR}/release.tar.gz"
+    curl --location --silent --output "${TAR_GZ}" "${URL}"
+    mkdir -p "${DEST_DIR}"
+    tar xzf "${TAR_GZ}" --directory "${DEST_DIR}"
+    rm -rf "${TMP_DIR}"
+fi
+
+cd "${DATA_DIR}/${APP}" || exit
+[[ -s current ]] && unlink current
+ln -s "${VERSION}" current
+
+cd "${XDG_BIN_HOME}" || exit
+[[ -L "${APP}" ]] || ln --symbolic "${DATA_DIR}/${APP}/current/${APP}" ${APP}