Make import maps unstable (#4934)

cli/flags.rs

@@ -380,6 +380,7 @@ fn install_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
 fn bundle_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
   ca_file_arg_parse(flags, matches);
   importmap_arg_parse(flags, matches);
+  unstable_arg_parse(flags, matches);
 
   let source_file = matches.value_of("source_file").unwrap().to_string();
 
@@ -459,6 +460,7 @@ fn cache_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
   config_arg_parse(flags, matches);
   no_remote_arg_parse(flags, matches);
   ca_file_arg_parse(flags, matches);
+  unstable_arg_parse(flags, matches);
   let files = matches
     .values_of("file")
     .unwrap()
@@ -495,15 +497,12 @@ fn run_test_args_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
   permission_args_parse(flags, matches);
   ca_file_arg_parse(flags, matches);
   inspect_arg_parse(flags, matches);
+  unstable_arg_parse(flags, matches);
 
   if matches.is_present("cached-only") {
     flags.cached_only = true;
   }
 
-  if matches.is_present("unstable") {
-    flags.unstable = true;
-  }
-
   if matches.is_present("seed") {
     let seed_string = matches.value_of("seed").unwrap();
     let seed = seed_string.parse::<u64>().unwrap();
@@ -684,6 +683,7 @@ fn bundle_subcommand<'a, 'b>() -> App<'a, 'b> {
     .arg(Arg::with_name("out_file").takes_value(true).required(false))
     .arg(ca_file_arg())
     .arg(importmap_arg())
+    .arg(unstable_arg())
     .about("Bundle module and dependencies into single file")
     .long_about(
       "Output a single JavaScript file with all dependencies.
@@ -768,6 +768,7 @@ fn cache_subcommand<'a, 'b>() -> App<'a, 'b> {
     .arg(lock_arg())
     .arg(lock_write_arg())
     .arg(importmap_arg())
+    .arg(unstable_arg())
     .arg(config_arg())
     .arg(no_remote_arg())
     .arg(
@@ -915,6 +916,7 @@ fn permission_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
 fn run_test_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
   permission_args(inspect_args(app))
     .arg(importmap_arg())
+    .arg(unstable_arg())
     .arg(reload_arg())
     .arg(config_arg())
     .arg(lock_arg())
@@ -927,11 +929,6 @@ fn run_test_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
         .long("cached-only")
         .help("Require that remote dependencies are already cached"),
     )
-    .arg(
-      Arg::with_name("unstable")
-        .long("unstable")
-        .help("Enable unstable APIs"),
-    )
     .arg(
       Arg::with_name("seed")
         .long("seed")
@@ -1055,6 +1052,18 @@ fn ca_file_arg_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
   flags.ca_file = matches.value_of("cert").map(ToOwned::to_owned);
 }
 
+fn unstable_arg<'a, 'b>() -> Arg<'a, 'b> {
+  Arg::with_name("unstable")
+    .long("unstable")
+    .help("Enable unstable APIs")
+}
+
+fn unstable_arg_parse(flags: &mut Flags, matches: &clap::ArgMatches) {
+  if matches.is_present("unstable") {
+    flags.unstable = true;
+  }
+}
+
 fn inspect_args<'a, 'b>(app: App<'a, 'b>) -> App<'a, 'b> {
   app
     .arg(
@@ -1152,9 +1161,10 @@ fn importmap_arg<'a, 'b>() -> Arg<'a, 'b> {
   Arg::with_name("importmap")
     .long("importmap")
     .value_name("FILE")
-    .help("Load import map file")
+    .help("UNSTABLE: Load import map file")
     .long_help(
-      "Load import map file
+      "UNSTABLE:
+Load import map file
 Docs: https://deno.land/std/manual.md#import-maps
 Specification: https://wicg.github.io/import-maps/
 Examples: https://github.com/WICG/import-maps#the-import-map",

cli/state.rs

@@ -240,15 +240,19 @@ impl State {
     // stack trace in JS.
     let s = self.0.borrow();
     if !s.global_state.flags.unstable {
-      eprintln!(
-        "Unstable API '{}'. The --unstable flag must be provided.",
-        api_name
-      );
-      std::process::exit(70);
+      exit_unstable(api_name);
     }
   }
 }
 
+fn exit_unstable(api_name: &str) {
+  eprintln!(
+    "Unstable API '{}'. The --unstable flag must be provided.",
+    api_name
+  );
+  std::process::exit(70);
+}
+
 impl ModuleLoader for State {
   fn resolve(
     &self,
@@ -318,7 +322,12 @@ impl State {
     let import_map: Option<ImportMap> =
       match global_state.flags.import_map_path.as_ref() {
         None => None,
-        Some(file_path) => Some(ImportMap::load(file_path)?),
+        Some(file_path) => {
+          if !global_state.flags.unstable {
+            exit_unstable("--importmap")
+          }
+          Some(ImportMap::load(file_path)?)
+        }
       };
 
     let seeded_rng = match global_state.flags.seed {

cli/tests/integration_tests.rs

@@ -540,6 +540,7 @@ fn bundle_import_map() {
     .arg("bundle")
     .arg("--importmap")
     .arg(import_map_path)
+    .arg("--unstable")
     .arg(import)
     .arg(&bundle)
     .spawn()
@@ -1014,10 +1015,17 @@ itest!(_030_eval_ts {
 
 itest!(_033_import_map {
   args:
-    "run --reload --importmap=importmaps/import_map.json importmaps/test.ts",
+    "run --reload --importmap=importmaps/import_map.json --unstable importmaps/test.ts",
   output: "033_import_map.out",
 });
 
+itest!(import_map_no_unstable {
+  args:
+    "run --reload --importmap=importmaps/import_map.json importmaps/test.ts",
+  output: "import_map_no_unstable.out",
+  exit_code: 70,
+});
+
 itest!(_034_onload {
   args: "run --reload 034_onload/main.ts",
   output: "034_onload.out",
@@ -1035,7 +1043,7 @@ itest_ignore!(_035_cached_only_flag {
 
 itest!(_036_import_map_fetch {
   args:
-    "cache --reload --importmap=importmaps/import_map.json importmaps/test.ts",
+    "cache --reload --importmap=importmaps/import_map.json --unstable importmaps/test.ts",
   output: "036_import_map_fetch.out",
 });