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, 7 insertions, 2 deletions

diff --git a/cli/resolver.rs b/cli/resolver.rs
index c1bb8a0a5..c9940b406 100644
--- a/cli/resolver.rs
+++ b/cli/resolver.rs
@@ -233,8 +233,13 @@ impl CliNodeResolver {
           let package_json_path = package_folder.join("package.json");
           if !self.fs.exists_sync(&package_json_path) {
             return Err(anyhow!(
-              "Could not find '{}'. Deno expects the node_modules/ directory to be up to date. Did you forget to run `npm install`?",
-              package_json_path.display()
+              "Could not find '{}'. Deno expects the node_modules/ directory to be up to date. Did you forget to run `{}`?",
+              package_json_path.display(),
+              if *crate::args::DENO_FUTURE {
+                "deno install"
+              } else {
+                "npm install"
+              },
             ));
           }
         }