Add a utility script to make an CI integration easy

install-via-release.sh

@@ -0,0 +1,61 @@
+#!/bin/bash
+#
+# This script downloads a binary of `go-github-apps` into the current working directory with adding execution bit.
+# After that, you can move the binary to an arbitrary directory like /usr/local/bin.
+#
+
+VERSION=
+
+usage() {
+  echo "usage: $0 -v VERSION" >&2
+}
+
+while getopts hv: OPT; do
+  case $OPT in
+    v)
+      VERSION=$OPTARG
+      ;;
+    *|h) usage; exit 1 ;;
+  esac
+done
+
+if [ -z "${VERSION}" ]; then
+  echo "Please specify VERSION via -v" >&2
+  echo
+  usage
+  exit 1
+fi
+
+URL=
+BASE_URL="https://github.com/nabeken/go-github-apps/releases/download/${VERSION}"
+
+case "$(uname -s)" in
+  linux)
+    URL="${BASE_URL}/go-github-apps_${VERSION#v}_linux_amd64.tar.gz"
+    ;;
+  Darwin)
+    URL="${BASE_URL}/go-github-apps_${VERSION#v}_darwin_amd64.tar.gz"
+    ;;
+  *)
+    echo "Currently $(uname -s) isn't supported. PR is welcome." >&2
+    ;;
+esac
+
+shift $((OPTIND - 1))
+
+DIR=$(mktemp -d)
+trap "rm -rf '${DIR}'" EXIT 1 2 3 15
+
+pushd $DIR > /dev/null
+echo "Downloading ${URL} into ${DIR}" >&2
+  curl --fail -sSL -O "${URL}"
+  if [ $? -ne 0 ]; then
+    echo "unable to download via Github Releases" >&2
+    exit 1
+  fi
+popd > /dev/null
+
+FN="$(basename ${URL})"
+tar xvf "${DIR}/${FN}" go-github-apps || exit 1
+
+./go-github-apps -h