refactor: always apply hint when formatting JsError (#26252)

Moves code for generating suggestions and hint to `cli/fmt_errors.rs`.

This effectively applies suggestion to any place that format JS errors
in terminal,
like `deno test`.

Addresses
https://github.com/denoland/deno/pull/26218#issuecomment-2409139055

2 files changed, 93 insertions, 109 deletions

diff --git a/cli/main.rs b/cli/main.rs
index ddb6078af..360307d75 100644
--- a/cli/main.rs
+++ b/cli/main.rs
@@ -47,8 +47,7 @@ use deno_core::error::JsError;
 use deno_core::futures::FutureExt;
 use deno_core::unsync::JoinHandle;
 use deno_npm::resolution::SnapshotFromLockfileError;
-use deno_runtime::fmt_errors::format_js_error_with_suggestions;
-use deno_runtime::fmt_errors::FixSuggestion;
+use deno_runtime::fmt_errors::format_js_error;
 use deno_runtime::tokio_util::create_and_run_current_thread_with_maybe_metrics;
 use deno_terminal::colors;
 use factory::CliFactory;
@@ -362,104 +361,12 @@ fn exit_with_message(message: &str, code: i32) -> ! {
   std::process::exit(code);
 }
 
-fn get_suggestions_for_terminal_errors(e: &JsError) -> Vec<FixSuggestion> {
-  if let Some(msg) = &e.message {
-    if msg.contains("module is not defined")
-      || msg.contains("exports is not defined")
-    {
-      return vec![
-        FixSuggestion::info(
-          "Deno does not support CommonJS modules without `.cjs` extension.",
-        ),
-        FixSuggestion::hint(
-          "Rewrite this module to ESM or change the file extension to `.cjs`.",
-        ),
-      ];
-    } else if msg.contains("openKv is not a function") {
-      return vec![
-        FixSuggestion::info("Deno.openKv() is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-kv` flag to enable this API.",
-        ),
-      ];
-    } else if msg.contains("cron is not a function") {
-      return vec![
-        FixSuggestion::info("Deno.cron() is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-cron` flag to enable this API.",
-        ),
-      ];
-    } else if msg.contains("WebSocketStream is not defined") {
-      return vec![
-        FixSuggestion::info("new WebSocketStream() is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-net` flag to enable this API.",
-        ),
-      ];
-    } else if msg.contains("Temporal is not defined") {
-      return vec![
-        FixSuggestion::info("Temporal is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-temporal` flag to enable this API.",
-        ),
-      ];
-    } else if msg.contains("BroadcastChannel is not defined") {
-      return vec![
-        FixSuggestion::info("BroadcastChannel is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-broadcast-channel` flag to enable this API.",
-        ),
-      ];
-    } else if msg.contains("window is not defined") {
-      return vec![
-        FixSuggestion::info("window global is not available in Deno 2."),
-        FixSuggestion::hint("Replace `window` with `globalThis`."),
-      ];
-    } else if msg.contains("UnsafeWindowSurface is not a constructor") {
-      return vec![
-        FixSuggestion::info("Deno.UnsafeWindowSurface is an unstable API."),
-        FixSuggestion::hint(
-          "Run again with `--unstable-webgpu` flag to enable this API.",
-        ),
-      ];
-    // Try to capture errors like:
-    // ```
-    // Uncaught Error: Cannot find module '../build/Release/canvas.node'
-    // Require stack:
-    // - /.../deno/npm/registry.npmjs.org/canvas/2.11.2/lib/bindings.js
-    // - /.../.cache/deno/npm/registry.npmjs.org/canvas/2.11.2/lib/canvas.js
-    // ```
-    } else if msg.contains("Cannot find module")
-      && msg.contains("Require stack")
-      && msg.contains(".node'")
-    {
-      return vec![
-        FixSuggestion::info_multiline(
-          &[
-            "Trying to execute an npm package using Node-API addons,",
-            "these packages require local `node_modules` directory to be present."
-          ]
-        ),
-        FixSuggestion::hint_multiline(
-          &[
-            "Add `\"nodeModulesDir\": \"auto\" option to `deno.json`, and then run",
-            "`deno install --allow-scripts=npm:<package> --entrypoint <script>` to setup `node_modules` directory."
-          ]
-        )
-      ];
-    }
-  }
-
-  vec![]
-}
-
 fn exit_for_error(error: AnyError) -> ! {
   let mut error_string = format!("{error:?}");
   let mut error_code = 1;
 
   if let Some(e) = error.downcast_ref::<JsError>() {
-    let suggestions = get_suggestions_for_terminal_errors(e);
-    error_string = format_js_error_with_suggestions(e, suggestions);
+    error_string = format_js_error(e);
   } else if let Some(SnapshotFromLockfileError::IntegrityCheckFailed(e)) =
     error.downcast_ref::<SnapshotFromLockfileError>()
   {
diff --git a/runtime/fmt_errors.rs b/runtime/fmt_errors.rs
index 44a947732..0d4274e8a 100644
--- a/runtime/fmt_errors.rs
+++ b/runtime/fmt_errors.rs
@@ -282,28 +282,105 @@ fn format_js_error_inner(
   s
 }
 
-/// Format a [`JsError`] for terminal output.
-pub fn format_js_error(js_error: &JsError) -> String {
-  let circular =
-    find_recursive_cause(js_error).map(|reference| IndexedErrorReference {
-      reference,
-      index: 1,
-    });
+fn get_suggestions_for_terminal_errors(e: &JsError) -> Vec<FixSuggestion> {
+  if let Some(msg) = &e.message {
+    if msg.contains("module is not defined")
+      || msg.contains("exports is not defined")
+    {
+      return vec![
+        FixSuggestion::info(
+          "Deno does not support CommonJS modules without `.cjs` extension.",
+        ),
+        FixSuggestion::hint(
+          "Rewrite this module to ESM or change the file extension to `.cjs`.",
+        ),
+      ];
+    } else if msg.contains("openKv is not a function") {
+      return vec![
+        FixSuggestion::info("Deno.openKv() is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-kv` flag to enable this API.",
+        ),
+      ];
+    } else if msg.contains("cron is not a function") {
+      return vec![
+        FixSuggestion::info("Deno.cron() is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-cron` flag to enable this API.",
+        ),
+      ];
+    } else if msg.contains("WebSocketStream is not defined") {
+      return vec![
+        FixSuggestion::info("new WebSocketStream() is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-net` flag to enable this API.",
+        ),
+      ];
+    } else if msg.contains("Temporal is not defined") {
+      return vec![
+        FixSuggestion::info("Temporal is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-temporal` flag to enable this API.",
+        ),
+      ];
+    } else if msg.contains("BroadcastChannel is not defined") {
+      return vec![
+        FixSuggestion::info("BroadcastChannel is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-broadcast-channel` flag to enable this API.",
+        ),
+      ];
+    } else if msg.contains("window is not defined") {
+      return vec![
+        FixSuggestion::info("window global is not available in Deno 2."),
+        FixSuggestion::hint("Replace `window` with `globalThis`."),
+      ];
+    } else if msg.contains("UnsafeWindowSurface is not a constructor") {
+      return vec![
+        FixSuggestion::info("Deno.UnsafeWindowSurface is an unstable API."),
+        FixSuggestion::hint(
+          "Run again with `--unstable-webgpu` flag to enable this API.",
+        ),
+      ];
+    // Try to capture errors like:
+    // ```
+    // Uncaught Error: Cannot find module '../build/Release/canvas.node'
+    // Require stack:
+    // - /.../deno/npm/registry.npmjs.org/canvas/2.11.2/lib/bindings.js
+    // - /.../.cache/deno/npm/registry.npmjs.org/canvas/2.11.2/lib/canvas.js
+    // ```
+    } else if msg.contains("Cannot find module")
+      && msg.contains("Require stack")
+      && msg.contains(".node'")
+    {
+      return vec![
+        FixSuggestion::info_multiline(
+          &[
+            "Trying to execute an npm package using Node-API addons,",
+            "these packages require local `node_modules` directory to be present."
+          ]
+        ),
+        FixSuggestion::hint_multiline(
+          &[
+            "Add `\"nodeModulesDir\": \"auto\" option to `deno.json`, and then run",
+            "`deno install --allow-scripts=npm:<package> --entrypoint <script>` to setup `node_modules` directory."
+          ]
+        )
+      ];
+    }
+  }
 
-  format_js_error_inner(js_error, circular, true, vec![])
+  vec![]
 }
 
-/// Format a [`JsError`] for terminal output, printing additional suggestions.
-pub fn format_js_error_with_suggestions(
-  js_error: &JsError,
-  suggestions: Vec<FixSuggestion>,
-) -> String {
+/// Format a [`JsError`] for terminal output.
+pub fn format_js_error(js_error: &JsError) -> String {
   let circular =
     find_recursive_cause(js_error).map(|reference| IndexedErrorReference {
       reference,
       index: 1,
     });
-
+  let suggestions = get_suggestions_for_terminal_errors(js_error);
   format_js_error_inner(js_error, circular, true, suggestions)
 }