Split each block of terraform hcl2 into individual files

main.go

package main

import (
	"flag"
	"fmt"
	"github.com/hashicorp/hcl/v2"
	"os"
	"path/filepath"

	"github.com/hashicorp/hcl/v2/hclwrite"
)

func main() {
	// Define command-line flags for input file and output directory
	inputFile := flag.String("input", "", "Path to the input HCL file")
	outputDir := flag.String("output", "", "Directory to save individual HCL block files")
	flag.Parse()

	// Check if the input file and output directory are provided
	if *inputFile == "" || *outputDir == "" {
		fmt.Println("Usage: go run main.go -input=<input-file> -output=<output-dir>")
		return
	}

	// Create the output directory if it does not exist
	if err := os.MkdirAll(*outputDir, os.ModePerm); err != nil {
		fmt.Printf("Error creating output directory: %v\n", err)
		return
	}
	// read *inputFile and make it into a bytearray
	file, err := os.ReadFile(*inputFile)
	if err != nil {
		fmt.Printf("Error reading input file: %v\n", err)
		return
	}

	f, diags := hclwrite.ParseConfig(file, "example.tf", hcl.Pos{Line: 1, Column: 1})
	if diags.HasErrors() {
		fmt.Printf("Failed to parse HCL file: %v\n", diags)
		return
	}
	// Iterate over the blocks and write each to a separate file
	for i, block := range f.Body().Blocks() {
		blockFile := hclwrite.NewEmptyFile()
		blockFile.Body().AppendBlock(block)

		outputFile := filepath.Join(*outputDir, fmt.Sprintf("block_%d.hcl", i+1))
		if err := os.WriteFile(outputFile, blockFile.Bytes(), 0644); err != nil {
			fmt.Printf("Error writing block file %s: %v\n", outputFile, err)
			return
		}
	}

	fmt.Println("HCL blocks have been successfully split into individual files.")
}