Implement full install shell script

scripts/install.sh

@@ -1 +1,78 @@
 #!/bin/sh
+
+BINARY_NAME="rokit"
+REPOSITORY="filiptibell/rokit"
+
+# Make sure we have prerequisites installed: curl + unzip
+if ! command -v curl >/dev/null 2>&1; then
+    echo "Error: 'curl' is not installed." >&2
+    exit 1
+fi
+
+if ! command -v unzip >/dev/null 2>&1; then
+    echo "Error: 'unzip' is not installed." >&2
+    exit 1
+fi
+
+# Determine OS and architecture for the current system
+OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
+case "$OS" in
+    darwin) OS="macos" ;;
+    linux) OS="linux" ;;
+    cygwin*|mingw*|msys*) OS="windows" ;;
+    *)
+        echo "Unsupported OS: $OS" >&2
+        exit 1 ;;
+esac
+ARCH="$(uname -m)"
+case "$ARCH" in
+    x86_64) ARCH="x86_64" ;;
+    x86-64) ARCH="x86_64" ;;
+    arm64) ARCH="aarch64" ;;
+    aarch64) ARCH="aarch64" ;;
+    *) echo "Unsupported architecture: $ARCH" >&2; exit 1 ;;
+esac
+
+# Construct file pattern for our desired zip file based on OS + arch
+# NOTE: This only works for exact patterns "binary-X.Y.Z-os-arch.zip"
+# and WILL break if the version contains extra metadata / pre-release
+FILE_PATTERN="${BINARY_NAME}-[0-9]*\\.[0-9]*\\.[0-9]*-${OS}-${ARCH}.zip"
+
+# GitHub API URL for the latest release
+API_URL="https://api.github.com/repos/$REPOSITORY/releases/latest"
+
+# Use curl to fetch the latest release data from GitHub API
+echo "Downloading latest release..."
+RELEASE_JSON_DATA=$(curl --proto '=https' --tlsv1.2 -sSf --connect-timeout 10 --max-time 30 "$API_URL")
+
+# Check if the release was fetched successfully
+if [ -z "$RELEASE_JSON_DATA" ] || echo "$RELEASE_JSON_DATA" | grep -q "Not Found"; then
+    echo "Error: Latest release was not found. Please check your network connection." >&2
+    exit 1
+fi
+
+# Try to extract the download URL from the response
+RELEASE_DOWNLOAD_URL=$(echo "$RELEASE_JSON_DATA" | grep -o "\"browser_download_url\": \".*${FILE_PATTERN}\"" | cut -d '"' -f 4 | head -n 1)
+if [ -z "$RELEASE_DOWNLOAD_URL" ]; then
+    echo "Error: Failed to find zip that matches the pattern \"$FILE_PATTERN\" in the latest release." >&2
+    exit 1
+fi
+
+# Download the file using curl
+ZIP_FILE=$(echo "$RELEASE_DOWNLOAD_URL" | rev | cut -d '/' -f 1 | rev)
+curl --proto '=https' --tlsv1.2 -L -o "$ZIP_FILE" -sSf --connect-timeout 10 --max-time 60 "$RELEASE_DOWNLOAD_URL"
+
+# Unzip only the specific file we want and make sure it was successful
+echo "Unzipping '$ZIP_FILE'..."
+unzip -o -q "$ZIP_FILE" "$BINARY_NAME" -d .
+rm "$ZIP_FILE"
+if [ ! -f "$BINARY_NAME" ]; then
+    echo "Error: The file '$BINARY_NAME' does not exist in the archive." >&2
+    exit 1
+fi
+
+# Execute the file and remove it when done
+echo "Running $BINARY_NAME installation...\n"
+chmod +x "$BINARY_NAME"
+./"$BINARY_NAME" self-install
+rm "$BINARY_NAME"