Set up automated updates for GitHub-sourced binaries

.local/bin/ghup

@@ -0,0 +1,45 @@
+#! /usr/bin/sh
+
+STATE_DIR="$(systemd-path user-state-private)"/github-versions
+mkdir -p "${STATE_DIR}"
+
+github_update() {
+    package="$1"
+    repo="$2"
+    resource="$3"
+    post_fetch="$4"
+
+    response=$(curl --silent "https://api.github.com/repos/${repo}/releases/latest")
+    latest_version=$(printf '%s' "${response}" | jq --raw-output .name)
+    VERSION_FILE="${STATE_DIR}/${package}"
+
+    install="false"
+    if [ -f "${VERSION_FILE}" ]; then
+        installed_version=$(cat "${VERSION_FILE}")
+        if [ "${installed_version}" = "${latest_version}" ]; then
+            echo "Latest version \"${package} ${installed_version}\" is already installed"
+        else
+            echo "Upgrading \"${package} ${installed_version}\" -> \"${package} ${latest_version}\"..."
+            install="true"
+        fi
+    else
+        echo "Installing \"${package} ${latest_version}\"..."
+        install="true"
+    fi
+
+    if [ "${install}" = "true" ]; then
+        asset=$(printf '%s' "${response}" | jq --raw-output ".assets[] | select(.name == \"${resource}\").browser_download_url")
+        curl --location "${asset}" | "${post_fetch}" && \
+        echo "${latest_version}" > "${VERSION_FILE}" && \
+        echo "Successfully installed \"${package} ${latest_version}\""
+    fi
+}
+
+PKG_DIR="$(systemd-path user-shared)"/github-versions
+if [ -d "${PKG_DIR}" ]; then
+    echo "Starting iteration"
+    for package in "${PKG_DIR}"/*; do
+        # shellcheck source=/dev/null
+        . "${package}"
+    done
+fi

.local/bin/upgrade

@@ -24,3 +24,4 @@ apt_update
 pipx_update
 rustup update
 cargo_update
+ghup