Text Processingflags: g

HCL / Terraform Variable Reference

Match Terraform / HCL references like `var.name`, `local.foo`, `module.x.output`, or `data.aws_ami.ubuntu.id`.

Available in

JavaScript / ECMAScript code

jsJavaScript

const re = new RegExp("\\b(?:var|local|module|data)\\.[a-zA-Z_][\\w\\-]*(?:\\.[a-zA-Z_][\\w\\-]*)*", "g");
const input = "vpc_id = module.network.vpc_id";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

Python (re) code

pyPython

import re

pattern = re.compile(r"\b(?:var|local|module|data)\.[a-zA-Z_][\w\-]*(?:\.[a-zA-Z_][\w\-]*)*")
input_text = "vpc_id = module.network.vpc_id"
for m in pattern.finditer(input_text):
    print(m.group(0))

Stdlib `re` module — no third-party dependency. Works on Python 3.6+.

Go (RE2) code

goGo

package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`\b(?:var|local|module|data)\.[a-zA-Z_][\w\-]*(?:\.[a-zA-Z_][\w\-]*)*`)
	input := `vpc_id = module.network.vpc_id`
	for _, match := range re.FindAllString(input, -1) {
		fmt.Println(match)
	}
}

Uses `regexp.MustCompile` (panics on bad patterns at startup) and `FindAllString` for all matches.

Pattern

regexengine-agnostic

\b(?:var|local|module|data)\.[a-zA-Z_][\w\-]*(?:\.[a-zA-Z_][\w\-]*)*   (flags: g)

Raw source: \b(?:var|local|module|data)\.[a-zA-Z_][\w\-]*(?:\.[a-zA-Z_][\w\-]*)*

How it works

\b(?:var|local|module|data) anchors at one of the four namespace prefixes. \.[a-zA-Z_][\w\-]* matches the first segment after the prefix. (?:\.[a-zA-Z_][\w\-]*)* matches additional dotted accessors (deep references like `module.network.outputs.vpc_id`).