chore: install script and docs

Set a installation script and improve the documentation.

.github/workflows/test.yaml

@@ -25,6 +25,9 @@ jobs:
       - name: unshallow
         run: git fetch --prune --unshallow
 
+      - name: shellcheck
+        run: shellcheck *.sh
+
       - name: golanci-linter
         uses: golangci/golangci-lint-action@v4
         with:

README.md

@@ -1,25 +1,48 @@
-# LB - (Lambda) Layer Balancer
+# lb
 
 [![Build Status](https://img.shields.io/github/actions/workflow/status/faabiosr/lb/test.yaml?logo=github&style=flat-square)](https://github.com/faabiosr/lb/actions?query=workflow:test)
 [![Codecov branch](https://img.shields.io/codecov/c/github/faabiosr/lb/master.svg?style=flat-square)](https://codecov.io/gh/faabiosr/lb)
 [![Go Report Card](https://goreportcard.com/badge/github.com/faabiosr/lb?style=flat-square)](https://goreportcard.com/report/github.com/faabiosr/lb)
 [![Release](https://img.shields.io/github/v/release/faabiosr/lb?display_name=tag&style=flat-square)](https://github.com/faabiosr/lb/releases)
 [![License](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://github.com/faabiosr/lb/blob/master/LICENSE)
 
-Balance your AWS lambda layers across regions.
+## :tada: Overview
+`lb` lets you balance your AWS lambda layers across regions.
 
-## Installation
+## :relaxed: Motivation
+Managing AWS lambda layer across regions is difficult, because each new layer deployment will increment the version automatically, and if you need to introduce a new region, the result will be different versions.
 
-### Linux (apt)
+## :dart: Installation
+
+### Unix-like
+
+#### Manual installation
+```sh
+# by default will install into ~/.local/bin folder.
+curl -sSL https://raw.githubusercontent.com/faabiosr/lb/main/install.sh | bash 
+
+# install into /usr/local/bin
+curl -sSL https://raw.githubusercontent.com/faabiosr/lb/main/install.sh | sudo INSTALL_PATH=/usr/local/bin bash
+```
+
+### go
 ```sh
-curl -LO https://github.com/faabiosr/lb/releases/download/v1.0.0/lb_1.0.0_linux_x86_64.deb
-sudo apt install -f ./lb_1.0.0_linux_x86_64.deb
+go install github.com/faabiosr/lb@latest
 ```
 
-## Usage
-[![asciicast](https://asciinema.org/a/658749.svg)](https://asciinema.org/a/658749)
+## :gem: Usage
+
+### Verify the versions deployed across regions
+```sh
+lb verify --regions 'us-east-1,eu-central-1,sa-east-1' my-layer
+```
+
+### Bump all regions with the latest version
+```sh
+lb bump --regions 'us-east-1,eu-central-1,sa-east-1' my-layer
+```
 
-## Development
+## :toolbox: Development
 
 ### Requirements
 
@@ -35,6 +58,6 @@ Please run the make target below to see the provided targets.
 $ make help
 ```
 
-## License
+## :page_with_curl: License
 
 This project is released under the MIT licence. See [LICENSE](https://github.com/faabiosr/lb/blob/master/LICENSE) for more details.

install.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# Install `lb`
+
+function main {
+  local p="install: error:"
+  local ARCH=""
+  local OS=""
+  local VERSION=""
+
+  # check that required one of the commands are installed before doing anything.
+  if command -v curl &> /dev/null; then
+    cmd="curl -sSL"
+  elif command -v wget &> /dev/null; then
+    cmd="wget -qO -"
+  else
+    echo "${p} neither curl nor wget was found, please install of them and try again!"
+    exit 1
+  fi
+
+  # Get the latest version
+  VERSION=$(${cmd} "https://api.github.com/repos/faabiosr/lb/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/' | cut -c 2-)
+
+  if [ -z "${VERSION}" ]; then
+    echo "${p} failed to get the latest version, please check your network connection and try again!"
+    exit 1
+  fi
+
+  echo "installing lb v${VERSION} ..."
+
+  # Check if the OS is supported
+  OS=$(uname -s | tr '[:upper:]' '[:lower:]')
+  if [ "${OS}" = "darwin" ]; then
+    OS="macos"
+  fi
+
+  ARCH=$(uname -m)
+  if [ "${ARCH}" = "arm64" ]; then
+    ARCH="aarch64"
+  fi
+
+  local FILENAME="lb_${VERSION}_${OS}_${ARCH}"
+  local INSTALL_PATH="${INSTALL_PATH:-${HOME}/.local/bin}"
+
+  echo "https://github.com/faabiosr/lb/releases/download/v${VERSION}/${TAR_FILE}"
+  echo "installation path: ${INSTALL_PATH}"
+
+  mkdir -p "${INSTALL_PATH}" >/dev/null 2>&1 || { >&2 echo "${p} failed to create ${INSTALL_PATH} directory, please check your sudo permissions and try again!"; exit 1; }
+
+
+  ${cmd} "https://github.com/faabiosr/lb/releases/download/v${VERSION}/${FILENAME}.tar.gz" \
+    | tar -xzvf - -C "${INSTALL_PATH}" "${FILENAME}/lb" --strip-components=1
+
+  echo "lb installed successfully!"
+}
+
+main "$@"