fix: allow absolute --project path (#269)

resolve-tsconfig.js

@@ -1,4 +1,4 @@
-import { join } from 'node:path'
+import { isAbsolute, join } from 'node:path'
 import { statSync } from 'node:fs'
 
 import { packageConfigSync } from 'pkg-conf'
@@ -26,7 +26,10 @@ const _isValidPath = (pathToValidate) => {
  * @returns {string | undefined}
  */
 export const _resolveTSConfigPath = (cwd, settingsProjectPath) => {
-  const settingsPath = join(cwd, settingsProjectPath)
+  let settingsPath = settingsProjectPath
+  if (!isAbsolute(settingsPath)) {
+    settingsPath = join(cwd, settingsProjectPath)
+  }
   if (_isValidPath(settingsPath)) {
     return settingsPath
   }

test/cli.js

@@ -3,6 +3,7 @@ import { fileURLToPath } from 'node:url'
 import test from 'tape'
 import crossSpawn from 'cross-spawn'
 import options from '../options.js'
+import { CURRENT_WORKING_DIRECTORY } from '../constants.js'
 
 const CLI_PATH = fileURLToPath(new URL('../cli.js', import.meta.url))
 
@@ -34,3 +35,29 @@ test('command line usage: --version', (t) => {
     t.equal(code, 0, 'zero exit code')
   })
 })
+
+test('command line usage with absolute project path: --project', (t) => {
+  t.plan(1)
+
+  const child = crossSpawn(CLI_PATH, ['--project', `${CURRENT_WORKING_DIRECTORY}/tsconfig.json`])
+  child.on('error', (err) => {
+    t.fail(err)
+  })
+
+  child.on('close', (code) => {
+    t.equal(code, 0, 'zero exit code')
+  })
+})
+
+test('command line usage with relative project path: --project', (t) => {
+  t.plan(1)
+
+  const child = crossSpawn(CLI_PATH, ['--project', './tsconfig.json'])
+  child.on('error', (err) => {
+    t.fail(err)
+  })
+
+  child.on('close', (code) => {
+    t.equal(code, 0, 'zero exit code')
+  })
+})