From 60688c563e6d02813b021ad91132fe1eb3f103b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Tue, 23 Jan 2024 23:51:07 +0100
Subject: [PATCH] feat: import.meta.filename and import.meta.dirname (#22061)

This commit adds `import.meta.filename` and `import.meta.dirname` APIs.

These APIs return string representation of filename and containing
dirname.
They are only defined for local modules (modules that have `file:///`
scheme).

Example:

```ts
console.log(import.meta.filename, import.meta.dirname)
```

Unix:
```
$ deno run /dev/my_module.ts
/dev/my_module.ts /dev/
```

Windows:
```
$ deno run C:\dev\my_module.ts
C:\dev\my_module.ts C:\
```
---
 cli/tests/integration/run_tests.rs          |  1 +
 cli/tests/testdata/run/import_meta/main.out |  5 ++--
 cli/tests/testdata/run/import_meta/main.ts  | 12 ++++++---
 cli/tests/testdata/run/import_meta/other.ts |  8 +++++-
 cli/tsc/dts/lib.deno.ns.d.ts                | 30 +++++++++++++++++++++
 5 files changed, 50 insertions(+), 6 deletions(-)

diff --git a/cli/tests/integration/run_tests.rs b/cli/tests/integration/run_tests.rs
index 429ec2a04c..3a2b46133b 100644
--- a/cli/tests/integration/run_tests.rs
+++ b/cli/tests/integration/run_tests.rs
@@ -1493,6 +1493,7 @@ itest!(if_main {
 itest!(import_meta {
   args: "run --quiet --reload --import-map=run/import_meta/importmap.json run/import_meta/main.ts",
   output: "run/import_meta/main.out",
+  http_server: true,
 });
 
 itest!(main_module {
diff --git a/cli/tests/testdata/run/import_meta/main.out b/cli/tests/testdata/run/import_meta/main.out
index 0329dea8a7..5a86d62409 100644
--- a/cli/tests/testdata/run/import_meta/main.out
+++ b/cli/tests/testdata/run/import_meta/main.out
@@ -1,5 +1,6 @@
-other [WILDCARD]other.ts false
-main [WILDCARD]main.ts true
+other remote [WILDCARD]other.ts false undefined undefined
+other [WILDCARD]other.ts false [WILDCARD]other.ts [WILDCARD]
+main [WILDCARD]main.ts true [WILDCARD]main.ts [WILDCARD]
 Resolving ./foo.js file:///[WILDCARD]/foo.js
 Resolving bare from import map https://example.com/
 Resolving https://example.com/rewrite from import map https://example.com/rewritten
diff --git a/cli/tests/testdata/run/import_meta/main.ts b/cli/tests/testdata/run/import_meta/main.ts
index 96d63ba786..fb859e250e 100644
--- a/cli/tests/testdata/run/import_meta/main.ts
+++ b/cli/tests/testdata/run/import_meta/main.ts
@@ -1,9 +1,15 @@
 import { assertThrows } from "../../../../../test_util/std/assert/mod.ts";
-
-console.log("main", import.meta.url, import.meta.main);
-
+import "http://localhost:4545/run/import_meta/other.ts";
 import "./other.ts";
 
+console.log(
+  "main",
+  import.meta.url,
+  import.meta.main,
+  import.meta.filename,
+  import.meta.dirname,
+);
+
 console.log("Resolving ./foo.js", import.meta.resolve("./foo.js"));
 console.log("Resolving bare from import map", import.meta.resolve("bare"));
 console.log(
diff --git a/cli/tests/testdata/run/import_meta/other.ts b/cli/tests/testdata/run/import_meta/other.ts
index 47d7527cd7..5da6a49365 100644
--- a/cli/tests/testdata/run/import_meta/other.ts
+++ b/cli/tests/testdata/run/import_meta/other.ts
@@ -1 +1,7 @@
-console.log("other", import.meta.url, import.meta.main);
+console.log(
+  import.meta.url.startsWith("http") ? "other remote" : "other",
+  import.meta.url,
+  import.meta.main,
+  import.meta.filename,
+  import.meta.dirname,
+);
diff --git a/cli/tsc/dts/lib.deno.ns.d.ts b/cli/tsc/dts/lib.deno.ns.d.ts
index 8d1e28d4be..483c5c3d01 100644
--- a/cli/tsc/dts/lib.deno.ns.d.ts
+++ b/cli/tsc/dts/lib.deno.ns.d.ts
@@ -28,6 +28,36 @@ declare interface ImportMeta {
    */
   url: string;
 
+  /** The absolute path of the current module.
+   *
+   * This property is only provided for local modules (ie. using `file://` URLs).
+   *
+   * Example:
+   * ```
+   * // Unix
+   * console.log(import.meta.filename); // /home/alice/my_module.ts
+   *
+   * // Windows
+   * console.log(import.meta.filename); // C:\alice\my_module.ts
+   * ```
+   */
+  filename?: string;
+
+  /** The absolute path of the dirrectory containing the current module.
+   *
+   * This property is only provided for local modules (ie. using `file://` URLs).
+   *
+   * * Example:
+   * ```
+   * // Unix
+   * console.log(import.meta.dirname); // /home/alice/
+   *
+   * // Windows
+   * console.log(import.meta.dirname); // C:\alice\
+   * ```
+   */
+  dirname?: string;
+
   /** A flag that indicates if the current module is the main module that was
    * called when starting the program under Deno.
    *