fix(future): Emit `deno install` warning less often, suggest `deno install` in error message (#24706)

Two small changes:

- In our BYONM errors, suggest running `deno install` instead of `npm
install` if `DENO_FUTURE` is set
- Only emit warning about `deno install` changes if you do `deno install
<foo>` with deno_future unset

1 files changed, 4 insertions, 4 deletions

diff --git a/cli/tools/installer.rs b/cli/tools/installer.rs
index 01ed36711..d1beb79bb 100644
--- a/cli/tools/installer.rs
+++ b/cli/tools/installer.rs
@@ -283,12 +283,12 @@ pub async fn install_command(
   flags: Arc<Flags>,
   install_flags: InstallFlags,
 ) -> Result<(), AnyError> {
-  if !install_flags.global {
-    log::warn!("⚠️ `deno install` behavior will change in Deno 2. To preserve the current behavior use the `-g` or `--global` flag.");
-  }
-
   match install_flags.kind {
     InstallKind::Global(global_flags) => {
+      if !install_flags.global {
+        log::warn!("⚠️ `deno install` behavior will change in Deno 2. To preserve the current behavior use the `-g` or `--global` flag.");
+      }
+
       install_global(flags, global_flags).await
     }
     InstallKind::Local(maybe_add_flags) => {