Add setup script for automatic installation of system dependencies

setup.sh

@@ -0,0 +1,158 @@
+#!/usr/bin/env bash
+# Automatic setup of system dependencies for this project.
+# - Detects OS/package manager and installs required build tools and utilities.
+# - Installs Node.js and npm (skips if already present).
+# - Ensures tools needed by scripts/build-openssl-wasm.sh (curl, git, tar, make, perl, python, pkg-config).
+# Usage:
+#   chmod +x setup.sh
+#   ./setup.sh
+set -euo pipefail
+
+# Determine whether to use sudo when needed
+SUDO=""
+if [ "${EUID:-$(id -u)}" -ne 0 ]; then
+  if command -v sudo >/dev/null 2>&1; then
+    SUDO="sudo"
+  fi
+fi
+
+pm=""
+os="$(uname -s)"
+
+detect_pm() {
+  if [ "$os" = "Darwin" ]; then
+    pm="brew"
+    return
+  fi
+  if [ -f /etc/os-release ]; then
+    # shellcheck disable=SC1091
+    . /etc/os-release
+    like="${ID_LIKE:-}"
+    id="${ID:-}"
+    sig="$(printf "%s %s" "$id" "$like" | tr '[:upper:]' '[:lower:]')"
+    if echo "$sig" | grep -qiE 'debian|ubuntu'; then
+      pm="apt"
+      return
+    elif echo "$sig" | grep -qiE 'fedora|rhel|centos'; then
+      if command -v dnf >/dev/null 2>&1; then
+        pm="dnf"
+      else
+        pm="yum"
+      fi
+      return
+    elif echo "$sig" | grep -qiE 'arch'; then
+      pm="pacman"
+      return
+    elif echo "$sig" | grep -qiE 'alpine'; then
+      pm="apk"
+      return
+    fi
+  fi
+  # Fallback: probe common managers
+  for candidate in apt dnf yum pacman apk brew; do
+    if command -v "$candidate" >/dev/null 2>&1; then
+      pm="$candidate"
+      return
+    fi
+  done
+}
+
+detect_pm
+
+if [ -z "$pm" ]; then
+  echo "Unsupported OS or package manager not found."
+  echo "Please install required tools manually: git, curl, tar, make, perl, python3/pip, pkg-config, Node.js/npm."
+  exit 1
+fi
+
+have_node="no"
+if command -v node >/dev/null 2>&1; then
+  have_node="yes"
+fi
+
+log "Detected package manager: $pm"
+
+update_index() {
+  case "$pm" in
+    apt)
+      $SUDO apt-get update
+      ;;
+    dnf)
+      $SUDO dnf -y makecache
+      ;;
+    yum)
+      # Metadata refresh is implicit on install for many systems
+      ;;
+    pacman)
+      $SUDO pacman -Sy --noconfirm
+      ;;
+    apk)
+      $SUDO apk update
+      ;;
+    brew)
+      brew update
+      ;;
+  esac
+}
+
+install_packages() {
+  case "$pm" in
+    apt)
+      pkgs=(git curl tar make perl python3 python3-pip pkg-config build-essential)
+      if [ "$have_node" = "no" ]; then
+        pkgs+=(nodejs npm)
+      fi
+      $SUDO apt-get install -y "${pkgs[@]}"
+      ;;
+    dnf)
+      pkgs=(git curl tar make perl python3 python3-pip pkgconf-pkg-config gcc gcc-c++)
+      if [ "$have_node" = "no" ]; then
+        pkgs+=(nodejs npm)
+      fi
+      $SUDO dnf install -y "${pkgs[@]}"
+      ;;
+    yum)
+      pkgs=(git curl tar make perl python3 python3-pip pkgconfig gcc gcc-c++)
+      if [ "$have_node" = "no" ]; then
+        pkgs+=(nodejs npm)
+      fi
+      $SUDO yum install -y "${pkgs[@]}"
+      ;;
+    pacman)
+      # Arch: python package provides Python 3; pkgconf provides pkg-config
+      pkgs=(git curl tar make perl python pkgconf base-devel)
+      if [ "$have_node" = "no" ]; then
+        pkgs+=(nodejs npm)
+      fi
+      $SUDO pacman -S --noconfirm --needed "${pkgs[@]}"
+      ;;
+    apk)
+      pkgs=(git curl tar make perl python3 py3-pip pkgconf build-base)
+      if [ "$have_node" = "no" ]; then
+        pkgs+=(nodejs npm)
+      fi
+      $SUDO apk add --no-cache "${pkgs[@]}"
+      ;;
+    brew)
+      # macOS: system tar/make/perl exist; ensure pkg-config, python, node, git, curl
+      pkgs=(git curl python pkg-config node)
+      brew install "${pkgs[@]}"
+      ;;
+  esac
+}
+
+log "Refreshing package index..."
+update_index
+log "Installing required system packages..."
+install_packages
+
+log "Verifying installations..."
+if command -v git >/dev/null 2>&1; then git --version | sed 's/^/[setup] /'; else log "git missing"; fi
+if command -v curl >/dev/null 2>&1; then curl --version | head -n1 | sed 's/^/[setup] /'; else log "curl missing"; fi
+if command -v pkg-config >/dev/null 2>&1; then pkg-config --version | sed 's/^/[setup] /'; else log "pkg-config missing"; fi
+if command -v python3 >/dev/null 2>&1; then python3 --version | sed 's/^/[setup] /'; elif command -v python >/dev/null 2>&1; then python --version | sed 's/^/[setup] /'; else log "python missing"; fi
+if command -v node >/dev/null 2>&1; then node -v | sed 's/^/[setup] /'; else log "node missing (skipped install because it appears present earlier or not available via manager)"; fi
+if command -v npm >/dev/null 2>&1; then npm -v | sed 's/^/[setup] /'; else log "npm missing"; fi
+
+echo "[setup] Done. You can now run project builds, e.g.:"
+echo "[setup]   npm run build:wasm"