chore: add basic erlang detection via rebar

packages/build-info/src/runtime/erlang.test.ts

@@ -0,0 +1,29 @@
+import { beforeEach, expect, test } from 'vitest'
+
+import { mockFileSystem } from '../../tests/mock-file-system.js'
+import { NodeFS } from '../node/file-system.js'
+import { Project } from '../project.js'
+
+beforeEach((ctx) => {
+  ctx.fs = new NodeFS()
+})
+
+test('detects erlang when rebar.config is present', async ({ fs }) => {
+  const cwd = mockFileSystem({
+    'rebar.config': '',
+  })
+
+  const detected = await new Project(fs, cwd).detectRuntime()
+  expect(detected.length).toBe(1)
+  expect(detected[0].name).toBe('Erlang')
+})
+
+test('detects erlang when rebar.lock is present', async ({ fs }) => {
+  const cwd = mockFileSystem({
+    'rebar.lock': '',
+  })
+
+  const detected = await new Project(fs, cwd).detectRuntime()
+  expect(detected.length).toBe(1)
+  expect(detected[0].name).toBe('Erlang')
+})

packages/build-info/src/runtime/erlang.ts

@@ -0,0 +1,7 @@
+import { LangRuntime } from './runtime.js'
+
+export class Erlang extends LangRuntime {
+  id = 'erlang'
+  name = 'Erlang'
+  configFiles = ['rebar.config', 'rebar.lock']
+}

packages/build-info/src/runtime/index.ts

@@ -2,6 +2,7 @@ import { Brew } from './brew.js'
 import { Bun } from './bun.js'
 import { Emacs } from './cask.js'
 import { Dotnet } from './dotnet.js'
+import { Erlang } from './erlang.js'
 import { Go } from './go.js'
 import { Java } from './java.js'
 import { Node } from './node.js'
@@ -11,4 +12,4 @@ import { Ruby } from './ruby.js'
 import { Rust } from './rust.js'
 import { Swift } from './swift.js'
 
-export const runtimes = [Node, Ruby, Brew, Bun, Emacs, Dotnet, Go, Java, Php, Rust, Swift, Python]
+export const runtimes = [Node, Ruby, Brew, Bun, Dotnet, Emacs, Erlang, Go, Java, Php, Rust, Swift, Python]