From 758ad8de5c2766c32e341e4361c536c2357517d7 Mon Sep 17 00:00:00 2001
From: Rafa Mel <melrcm@gmx.net>
Date: Fri, 26 Apr 2019 09:21:27 +0200
Subject: [PATCH] feat(exposed/exists): adds exists

---
 src/exposed/file/exists.ts | 17 +++++++++++++++++
 src/exposed/file/index.ts  |  1 +
 2 files changed, 18 insertions(+)
 create mode 100644 src/exposed/file/exists.ts

diff --git a/src/exposed/file/exists.ts b/src/exposed/file/exists.ts
new file mode 100644
index 0000000..266cc52
--- /dev/null
+++ b/src/exposed/file/exists.ts
@@ -0,0 +1,17 @@
+import path from 'path';
+import core from '~/core';
+import { exists as _exists } from '~/utils/file';
+
+/**
+ * Verifies `file` exists and throws if it doesn't. `file` can be either a file or a directory, and be relative to the project's directory.
+ * @returns A `TScript`, as a function, that won't be executed until called by `kpo` -hence, calling `exists` won't have any effect until the returned function is called.
+ */
+export default function exists(file: string) {
+  return async function exists(): Promise<void> {
+    if (!path.isAbsolute(file)) {
+      const paths = await core.paths();
+      file = path.join(paths.directory, file);
+    }
+    await _exists(file, { fail: true });
+  };
+}
diff --git a/src/exposed/file/index.ts b/src/exposed/file/index.ts
index f5b9aab..5213fef 100644
--- a/src/exposed/file/index.ts
+++ b/src/exposed/file/index.ts
@@ -1 +1,2 @@
 export { default as json } from './json';
+export { default as exists } from './exists';