JavaScript / ECMAScript

HCL / Terraform Variable Reference in JS

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

Try it in the JS tester →

Pattern

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

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).

How the pattern 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`).

Examples

Input

vpc_id = module.network.vpc_id

Matches

  • module.network.vpc_id

Input

tags = merge(var.common_tags, local.env_tags)

Matches

  • var.common_tags
  • local.env_tags

Input

no references here

No match

—

Same pattern, other engines

Python (re)

Supported

See how this pattern looks (and behaves) in Python's stdlib `re` module.

Go (RE2)

Supported

See how this pattern looks (and behaves) in Go's `regexp` package (RE2 engine).

← Back to HCL / Terraform Variable Reference overview (all engines)