From dc926c322a428298c543bab12f6f334c32fdfae9 Mon Sep 17 00:00:00 2001
From: Benjamin Eckel <bhelx@simst.im>
Date: Thu, 26 Sep 2024 12:41:23 -0500
Subject: [PATCH] Better dependency checks

---
 config.yaml           |  4 --
 template/prepare.sh   | 86 +++++++++++++++++++++++++++++++++++++++++++
 template/xtp.toml.ejs |  4 +-
 3 files changed, 88 insertions(+), 6 deletions(-)
 create mode 100755 template/prepare.sh

diff --git a/config.yaml b/config.yaml
index 5a0388f..05b0e4d 100644
--- a/config.yaml
+++ b/config.yaml
@@ -1,8 +1,4 @@
 template-suffix: ejs
-dependencies:
-  - node
-  - npm
-  - extism-js
 
 available-feature-flags:
   - name: stub-with-code-samples
diff --git a/template/prepare.sh b/template/prepare.sh
new file mode 100755
index 0000000..0241c1c
--- /dev/null
+++ b/template/prepare.sh
@@ -0,0 +1,86 @@
+#!/bin/bash
+
+# Function to check if a command exists
+command_exists () {
+  command -v "$1" >/dev/null 2>&1
+}
+
+missing_deps=0
+
+# Check for Node.js
+if ! (command_exists node || command_exists nodejs); then
+  missing_deps=1
+  echo "❌ Node.js is not installed."
+  echo ""
+  echo "To install Node.js, visit the official download page:"
+  echo "👉 https://nodejs.org/en/download/"
+  echo ""
+  echo "Or install it using a package manager:"
+  echo ""
+  echo "🔹 macOS (Homebrew):"
+  echo "    brew install node"
+  echo ""
+  echo "🔹 Ubuntu/Debian:"
+  echo "    curl -fsSL https://deb.nodesource.com/setup_current.x | sudo -E bash -"
+  echo "    sudo apt-get install -y nodejs"
+  echo ""
+  echo "🔹 CentOS/RHEL:"
+  echo "    curl -fsSL https://rpm.nodesource.com/setup_current.x | sudo bash -"
+  echo "    sudo yum install -y nodejs"
+  echo ""
+  echo "🔹 Arch Linux:"
+  echo "    sudo pacman -S nodejs"
+  echo ""
+fi
+
+# Check for npm
+if ! command_exists npm; then
+  missing_deps=1
+  echo "❌ npm is not installed."
+  echo ""
+  echo "npm typically comes with Node.js. Please install Node.js to get npm."
+  echo ""
+  echo "Alternatively, install npm using a package manager:"
+  echo ""
+  echo "🔹 macOS (Homebrew):"
+  echo "    brew install npm"
+  echo ""
+  echo "🔹 Ubuntu/Debian:"
+  echo "    sudo apt-get install npm"
+  echo ""
+  echo "🔹 CentOS/RHEL:"
+  echo "    sudo yum install npm"
+  echo ""
+  echo "🔹 Arch Linux:"
+  echo "    sudo pacman -S npm"
+  echo ""
+fi
+
+# Exit with a bad exit code if any dependencies are missing
+if [ "$missing_deps" -ne 0 ]; then
+  echo "Install the missing dependencies and ensure they are on your path. Then run this command again."
+  # TODO: remove sleep when cli bug is fixed
+  sleep 2
+  exit 1
+fi
+
+# Check for extism-js
+if ! command_exists extism-js; then
+  echo "❌ extism-js is not installed."
+  echo ""
+  echo "extism-js is needed to compile the plug-in. You can find the instructions to install it here: https://github.com/extism/js-pdk"
+  echo ""
+  echo "Alternatively, you can use an install script."
+  echo ""
+  echo "🔹 Mac / Linux:"
+  echo "curl -L https://raw.githubusercontent.com/extism/js-pdk/main/install.sh | bash"
+  echo ""
+  echo "🔹 Windows:"
+  echo "powershell Invoke-WebRequest -Uri https://raw.githubusercontent.com/extism/js-pdk/main/install-windows.ps1 -OutFile install-windows.ps1"
+  echo "powershell -executionpolicy bypass -File .\install-windows.ps1"
+  echo ""
+  # TODO: remove sleep when cli bug is fixed
+  sleep 2
+  exit 1
+fi
+
diff --git a/template/xtp.toml.ejs b/template/xtp.toml.ejs
index 93a6755..dca6866 100644
--- a/template/xtp.toml.ejs
+++ b/template/xtp.toml.ejs
@@ -9,10 +9,10 @@ name = "<%- project.name %>"
 
 [scripts]
 # xtp plugin build runs this script to generate the wasm file
-build = "npm run build"
+build = "sh prepare.sh && npm run build"
 
 # xtp plugin init runs this script to format the code
 format = "npm run format"
 
 # xtp plugin init runs this script before running the format script
-prepare = "npm install"
+prepare = "sh prepare.sh && npm install"