fix: add more warnings when using sloppy imports (#21503)

One warning for when using it with `deno compile` and another when using
it with `deno run`.

2 files changed, 19 insertions, 0 deletions

diff --git a/cli/tools/compile.rs b/cli/tools/compile.rs
index b36ee94bd..b8007f7fd 100644
--- a/cli/tools/compile.rs
+++ b/cli/tools/compile.rs
@@ -37,6 +37,18 @@ pub async fn compile(
     vec
   };
 
+  // this is not supported, so show a warning about it, but don't error in order
+  // to allow someone to still run `deno compile` when this is in a deno.json
+  if cli_options.unstable_sloppy_imports() {
+    log::warn!(
+      concat!(
+        "{} Sloppy imports are not supported in deno compile. ",
+        "The compiled executable may encouter runtime errors.",
+      ),
+      crate::colors::yellow("Warning"),
+    );
+  }
+
   let output_path = resolve_compile_executable_output_path(
     &compile_flags,
     cli_options.initial_cwd(),
diff --git a/cli/tools/run/mod.rs b/cli/tools/run/mod.rs
index 321f94fc6..f4604e248 100644
--- a/cli/tools/run/mod.rs
+++ b/cli/tools/run/mod.rs
@@ -45,6 +45,13 @@ To grant permissions, set them before the script argument. For example:
   let http_client = factory.http_client();
   let cli_options = factory.cli_options();
 
+  if cli_options.unstable_sloppy_imports() {
+    log::warn!(
+      "{} Sloppy imports are not recommended and have a negative impact on performance.",
+      crate::colors::yellow("Warning"),
+    );
+  }
+
   // Run a background task that checks for available upgrades or output
   // if an earlier run of this background task found a new version of Deno.
   #[cfg(feature = "upgrade")]