chore: Install Script

Install from GitHub Releases page, based on local OS and architecture.

hack/install-lastest-release.sh

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+#
+# Install the latest relase, or informed version, of the 'path-helper' binary.
+# This may # require "sudo" to install on the target directory, set by environment
+# variable "INSTALL_DIR". By default installs the latest release.
+#
+# Usage:
+#   $ hack/install-lastest-release.sh [version]
+#
+
+set -Eeu -o pipefail
+
+declare -r APP="path-helper"
+
+# The version to install, or 'latest' to install the latest release.
+declare -r VERSION="${1:-latest}"
+declare -r TMP_DIR="${TMP_DIR:-/tmp}"
+# Installation directory, where the binary will be installed.
+declare -r INSTALL_DIR="${INSTALL_DIR:-/usr/local/bin}"
+
+# The repository owner and name, and the base domain path.
+declare -r REPO_OWNER="${REPO_OWNER:-otaviof}"
+declare -r REPO_NAME="${REPO_NAME:-${APP}}"
+declare -r BASE_DOMAIN_PATH="github.com/repos/${REPO_OWNER}/${REPO_NAME}"
+
+# Get the operating system and CPU type.
+declare -r LOWER_OSTYPE=$(uname -s | tr '[:upper:]' '[:lower:]')
+declare -r CPUTYPE=$(uname -m)
+
+# Search for the specific relase artifact URL, using the operating system and CPU
+# type. Returns the full URL to the artifact, or empty if not found.
+get_release_artifact_url() {
+    local _url="https://api.${BASE_DOMAIN_PATH}/releases"
+    local release_part="${LOWER_OSTYPE}_${CPUTYPE}.tar.gz"
+    if [[ "${VERSION}" == "latest" ]]; then
+        echo $(
+            curl -s ${_url}/latest |
+                jq -r '.assets[].browser_download_url' |
+                grep -i ${release_part} |
+                head -n 1
+        )
+    else
+        echo $(
+            curl -s ${_url} |
+                jq -r ".[] | select(.tag_name == \"${VERSION}\") | .assets[].browser_download_url" |
+                grep -i ${release_part} |
+                head -n 1
+        )
+    fi
+}
+
+# Installs the application from the artifact URL, if found.
+install_release() {
+    echo "Installing '${APP}' (${VERSION}) for ${LOWER_OSTYPE} (${CPUTYPE})..."
+    local _artifact_url=$(get_release_artifact_url)
+    if [[ -z "${_artifact_url}" ]]; then
+        echo "Release not found for version '${VERSION}' " \
+            "on ${LOWER_OSTYPE} (${CPUTYPE})!"
+        exit 1
+    fi
+
+    local _tarball="${REPO_NAME}.tar.gz"
+    echo "Installing '${APP}' ${VERSION} version from '${_artifact_url}'..."
+    curl -sL ${_artifact_url} -o "${_tarball}" >/dev/null &&
+        tar -zxvpf "${_tarball}" ${APP} >/dev/null &&
+        install -m 0755 ${APP} ${INSTALL_DIR}/${APP} >/dev/null &&
+        echo "The '${APP}' ${VERSION} version is installed at '${INSTALL_DIR}'"
+}
+
+#
+# Main
+#
+
+pushd ${TMP_DIR} >/dev/null &&
+    install_release
+popd