Add one-liner setup

Author: alexandre-daubois

README.md

@@ -51,6 +51,12 @@ Caddy exposes rich metrics through its admin API and Prometheus endpoint, but re
 
 ## Install
 
+```bash
+curl -fsSL https://raw.githubusercontent.com/alexandre-daubois/ember/main/install.sh | sh
+```
+
+Or with Homebrew:
+
 ```bash
 brew install alexandre-daubois/tap/ember
 ```

docs/getting-started.md

@@ -9,6 +9,18 @@ This guide covers installation, prerequisites, and your first run with Ember.
 
 ## Installation
 
+### One-liner
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/alexandre-daubois/ember/main/install.sh | sh
+```
+
+This detects your platform (Linux/macOS, amd64/arm64), downloads the latest release from GitHub, and installs the binary to `/usr/local/bin`. You can override the install directory with `EMBER_INSTALL_DIR`:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/alexandre-daubois/ember/main/install.sh | EMBER_INSTALL_DIR=~/.local/bin sh
+```
+
 ### Homebrew
 
 ```bash

install.sh

@@ -0,0 +1,87 @@
+#!/bin/sh
+set -eu
+
+REPO="alexandre-daubois/ember"
+INSTALL_DIR="${EMBER_INSTALL_DIR:-/usr/local/bin}"
+
+fail() {
+    printf "error: %s\n" "$1" >&2
+    exit 1
+}
+
+detect_os() {
+    case "$(uname -s)" in
+        Linux*)  echo "linux" ;;
+        Darwin*) echo "darwin" ;;
+        *)       fail "unsupported OS: $(uname -s)" ;;
+    esac
+}
+
+detect_arch() {
+    case "$(uname -m)" in
+        x86_64|amd64)  echo "amd64" ;;
+        aarch64|arm64) echo "arm64" ;;
+        *)             fail "unsupported architecture: $(uname -m)" ;;
+    esac
+}
+
+need_cmd() {
+    if ! command -v "$1" > /dev/null 2>&1; then
+        fail "'$1' is required but not found"
+    fi
+}
+
+need_cmd uname
+need_cmd mktemp
+need_cmd tar
+
+OS=$(detect_os)
+ARCH=$(detect_arch)
+
+if command -v curl > /dev/null 2>&1; then
+    fetch() { curl -fsSL "$1"; }
+    download() { curl -fsSL -o "$1" "$2"; }
+elif command -v wget > /dev/null 2>&1; then
+    fetch() { wget -qO- "$1"; }
+    download() { wget -qO "$1" "$2"; }
+else
+    fail "'curl' or 'wget' is required but neither was found"
+fi
+
+printf "Detecting platform... %s/%s\n" "$OS" "$ARCH"
+
+LATEST_URL="https://api.github.com/repos/${REPO}/releases/latest"
+TAG=$(fetch "$LATEST_URL" | grep '"tag_name"' | head -1 | sed 's/.*"tag_name": *"//;s/".*//')
+
+if [ -z "$TAG" ]; then
+    fail "could not determine latest release"
+fi
+
+VERSION="${TAG#v}"
+printf "Latest version: %s\n" "$VERSION"
+
+ARCHIVE="ember_${VERSION}_${OS}_${ARCH}.tar.gz"
+DOWNLOAD_URL="https://github.com/${REPO}/releases/download/${TAG}/${ARCHIVE}"
+
+TMPDIR=$(mktemp -d)
+trap 'rm -rf "$TMPDIR"' EXIT
+
+printf "Downloading %s...\n" "$ARCHIVE"
+download "${TMPDIR}/${ARCHIVE}" "$DOWNLOAD_URL"
+
+printf "Extracting...\n"
+tar -xzf "${TMPDIR}/${ARCHIVE}" -C "$TMPDIR"
+
+if [ ! -f "${TMPDIR}/ember" ]; then
+    fail "binary not found in archive"
+fi
+
+printf "Installing to %s...\n" "$INSTALL_DIR"
+if [ -w "$INSTALL_DIR" ]; then
+    mv "${TMPDIR}/ember" "${INSTALL_DIR}/ember"
+else
+    sudo mv "${TMPDIR}/ember" "${INSTALL_DIR}/ember"
+fi
+chmod +x "${INSTALL_DIR}/ember"
+
+printf "ember %s installed successfully!\n" "$VERSION"