Add wrapper to get the latest app. ALWAYS

Makefile

@@ -132,3 +132,9 @@ docker: DOCKER_REPO:=ivanilves/lstags
 docker: RELEASE_TAG:=latest
 docker:
 	@docker image build -t ${DOCKER_REPO}:${RELEASE_TAG} .
+
+wrapper: PREFIX=/usr/local
+wrapper:
+	install -o root -g root -m755 scripts/wrapper.sh ${PREFIX}/bin/lstags
+
+install: wrapper

README.md

@@ -58,6 +58,15 @@ You can either:
 ## Install: Binaries
 https://github.com/ivanilves/lstags/releases
 
+## Install: Wrapper
+```sh
+git clone git@github.com:ivanilves/lstags.git
+cd lstags
+sudo make wrapper
+lstags -h
+```
+A special wrapper script will be installed to manage `lstags` invocation and updates. :sunglasses:
+
 ## Install: From source
 ```sh
 git clone git@github.com:ivanilves/lstags.git

scripts/wrapper.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+#
+[[ "${DEBUG}" == "true" || "${DEBUG}" == "yes" ]] && set -x
+
+set -uo pipefail
+
+declare -r -i CACHE_TTL_MINUTES=2880
+
+declare -r LOCAL_PATH=${HOME}/.lstags; mkdir -p "${LOCAL_PATH}" || exit 2
+declare -r LSTAGS=${LOCAL_PATH}/lstags
+declare -r UPDATE_MARKER="${LOCAL_PATH}/update"
+
+declare -r LATEST_RELEASE_URL=https://api.github.com/repos/ivanilves/lstags/releases/latest
+declare -r DOWNLOAD_URL=https://github.com/ivanilves/lstags/releases/download
+
+CHECK_FOR_UPDATE=false
+if [[ ! -x "${LSTAGS}" || ! -f "${UPDATE_MARKER}" ]]; then
+  CHECK_FOR_UPDATE=true
+elif [[ -n "$(find ${UPDATE_MARKER} -type f -cmin +${CACHE_TTL_MINUTES})" ]]; then
+  CHECK_FOR_UPDATE=true
+fi
+
+PERFORM_UPDATE=false
+if [[ "${CHECK_FOR_UPDATE}" == "true" ]]; then
+  declare -r LATEST_VERSION=$(curl --connect-timeout 5 -m10 -s -f -H "Content-Type:application/json" "${LATEST_RELEASE_URL}" | jq -r '.name')
+  declare -r LATEST_TAG=${LATEST_VERSION/-*/}
+  declare -r LATEST_VERSION_URL=${DOWNLOAD_URL}/${LATEST_TAG}/lstags-$(uname -s | tr [A-Z] [a-z])-${LATEST_VERSION}.tar.gz
+
+  if [[ -x "${LSTAGS}" && -n "${LATEST_VERSION}" ]]; then
+    LOCAL_VERSION=$(${LSTAGS} --version | cut -d' ' -f2)
+    if [[ "${LOCAL_VERSION}" != "${LATEST_VERSION}" ]]; then
+      echo "Local version: ${LOCAL_VERSION} / Will download new one: ${LATEST_VERSION}"
+      PERFORM_UPDATE=true
+    else
+      echo "You already have the latest version: ${LOCAL_VERSION}"
+    fi
+  elif [[ -n "${LATEST_VERSION}" ]]; then
+    echo "No binary found, will download latest version: ${LATEST_VERSION}"
+    PERFORM_UPDATE=true
+  else
+    echo "Failed to check for update!" >>/dev/stderr
+  fi
+
+  echo '-'
+fi
+
+if [[ "${PERFORM_UPDATE}" == "true" ]]; then
+  curl --connect-timeout 5 -m30 -s -f "${LATEST_VERSION_URL}" -L | tar -C "${LOCAL_PATH}" -xz
+fi
+
+touch "${UPDATE_MARKER}"
+
+exec ${LSTAGS} ${@}