feat: add go version comparison to rollkit install script

Author: MSevey

public/install.sh

@@ -1,17 +1,68 @@
 #!/bin/bash
 
+# Function to compare versions
+compare_versions() {
+    if [ "$(printf '%s\n' "$1" "$2" | sort -V | head -n1)" = "$1" ]; then
+        if [ "$1" = "$2" ]; then
+            return 0 # Equal
+        else
+            return 1 # First is less
+        fi
+    else
+        return 2 # First is greater
+    fi
+}
+
+# Step 1: Download Rollkit source code
 echo "Downloading Rollkit source code..."
 git clone https://github.com/rollkit/rollkit.git
 
+# Navigate into the Rollkit repository
+cd rollkit || { echo "Failed to find the downloaded repository."; exit 1; }
+
+# Step 2: Extract the Go version from the go.mod file in the Rollkit repo
+go_mod_version=$(grep "^go " go.mod | cut -d' ' -f2)
+
+# Check if go.mod version was found
+if [ -z "$go_mod_version" ]; then
+    echo "Error: Could not find a Go version in go.mod."
+    exit 1
+fi
+
+# Format Go version for installation (e.g., "1.22.2" -> "go1.22.2")
+formatted_go_version="go${go_mod_version}"
+
+# Step 3: Check if Go is installed
 if ! which go > /dev/null; then
-	echo "Go is not installed. Attempting to install Go..."
-	curl -sL "https://rollkit.dev/install-go.sh" | sh -s "go1.22.2"
+    echo "Go is not installed. Attempting to install Go..."
+    curl -sL "https://rollkit.dev/install-go.sh" | sh -s "$formatted_go_version"
 fi
 
-cd rollkit || { echo "Failed to find the downloaded repository."; exit 1; }
-git fetch && git checkout $1
+# Get the installed Go version
+installed_version=$(go version | awk '{print $3}' | sed 's/go//')
+
+# Step 4: Validate installed version
+compare_versions "$installed_version" "$go_mod_version"
+comparison_result=$?
+
+if [ $comparison_result -eq 1 ]; then
+    echo "ERROR: The installed Go version ($installed_version) is less than the required version ($go_mod_version)."
+    echo "       Please upgrade your version of go."
+    exit 1
+elif [ $comparison_result -eq 2 ]; then
+    echo "INFO: The installed Go version ($installed_version) is greater than the required version ($go_mod_version)."
+    echo "      If you run into issues try downgrading your version of go."
+fi
+
+# Step 5: Continue with the installation of Rollkit
+echo "Fetching and checking out the specified branch or tag..."
+git fetch && git checkout "$1"
+
 echo "Building and installing Rollkit..."
 make install
+
 cd ..
 echo "Installation completed successfully."
+echo "Cleaning up downloads..."
+rm -rf rollkit