BREAKING: Remove --unstable flag (#25522)

This commit effectively removes the --unstable flag.

It's still being parsed, but it only prints a warning that a granular
flag should be used instead and doesn't actually enable any
unstable feature.

Closes https://github.com/denoland/deno/issues/25485
Closes https://github.com/denoland/deno/issues/23237

cli/args/flags.rs

@@ -570,6 +570,7 @@ fn parse_packages_allowed_scripts(s: &str) -> Result<String, AnyError> {
   Clone, Default, Debug, Eq, PartialEq, serde::Serialize, serde::Deserialize,
 )]
 pub struct UnstableConfig {
+  // TODO(bartlomieju): remove in Deno 2.5
   pub legacy_flag_enabled: bool, // --unstable
   pub bare_node_builtins: bool,  // --unstable-bare-node-builts
   pub sloppy_imports: bool,
@@ -5476,6 +5477,7 @@ fn unstable_args_parse(
   matches: &mut ArgMatches,
   cfg: UnstableArgsConfig,
 ) {
+  // TODO(bartlomieju): remove in Deno 2.5
   if matches.get_flag("unstable") {
     flags.unstable_config.legacy_flag_enabled = true;
   }
@@ -8765,7 +8767,7 @@ mod tests {
   #[test]
   fn test_with_flags() {
     #[rustfmt::skip]
-    let r = flags_from_vec(svec!["deno", "test", "--unstable", "--no-npm", "--no-remote", "--trace-leaks", "--no-run", "--filter", "- foo", "--coverage=cov", "--clean", "--location", "https:foo", "--allow-net", "--permit-no-files", "dir1/", "dir2/", "--", "arg1", "arg2"]);
+    let r = flags_from_vec(svec!["deno", "test", "--no-npm", "--no-remote", "--trace-leaks", "--no-run", "--filter", "- foo", "--coverage=cov", "--clean", "--location", "https:foo", "--allow-net", "--permit-no-files", "dir1/", "dir2/", "--", "arg1", "arg2"]);
     assert_eq!(
       r.unwrap(),
       Flags {
@@ -8789,10 +8791,6 @@ mod tests {
           junit_path: None,
           hide_stacktraces: false,
         }),
-        unstable_config: UnstableConfig {
-          legacy_flag_enabled: true,
-          ..Default::default()
-        },
         no_npm: true,
         no_remote: true,
         location: Some(Url::parse("https://foo/").unwrap()),
@@ -10200,7 +10198,6 @@ mod tests {
       "deno",
       "bench",
       "--json",
-      "--unstable",
       "--no-npm",
       "--no-remote",
       "--no-run",
@@ -10228,10 +10225,6 @@ mod tests {
           },
           watch: Default::default(),
         }),
-        unstable_config: UnstableConfig {
-          legacy_flag_enabled: true,
-          ..Default::default()
-        },
         no_npm: true,
         no_remote: true,
         type_check_mode: TypeCheckMode::Local,
@@ -10802,10 +10795,10 @@ mod tests {
           conn_file: None,
         }),
         unstable_config: UnstableConfig {
-          legacy_flag_enabled: false,
           bare_node_builtins: true,
           sloppy_imports: false,
           features: svec!["ffi", "worker-options"],
+          ..Default::default()
         },
         ..Flags::default()
       }

cli/args/mod.rs

@@ -1548,10 +1548,6 @@ impl CliOptions {
     &self.flags.unsafely_ignore_certificate_errors
   }
 
-  pub fn legacy_unstable_flag(&self) -> bool {
-    self.flags.unstable_config.legacy_flag_enabled
-  }
-
   pub fn unstable_bare_node_builtins(&self) -> bool {
     self.flags.unstable_config.bare_node_builtins
       || self.workspace().has_unstable("bare-node-builtins")

cli/factory.rs

@@ -714,10 +714,6 @@ impl CliFactory {
       let mut checker = FeatureChecker::default();
       checker.set_exit_cb(Box::new(crate::unstable_exit_cb));
       checker.set_warn_cb(Box::new(crate::unstable_warn_cb));
-      if cli_options.legacy_unstable_flag() {
-        checker.enable_legacy_unstable();
-        checker.warn_on_legacy_unstable();
-      }
       let unstable_features = cli_options.unstable_features();
       for granular_flag in crate::UNSTABLE_GRANULAR_FLAGS {
         if unstable_features.contains(&granular_flag.name.to_string()) {
@@ -856,7 +852,6 @@ impl CliFactory {
       unsafely_ignore_certificate_errors: cli_options
         .unsafely_ignore_certificate_errors()
         .clone(),
-      unstable: cli_options.legacy_unstable_flag(),
       create_hmr_runner,
       create_coverage_collector,
       node_ipc: cli_options.node_ipc_fd(),

cli/main.rs

@@ -478,25 +478,14 @@ fn resolve_flags_and_init(
     Err(err) => exit_for_error(AnyError::from(err)),
   };
 
-  // TODO(bartlomieju): remove when `--unstable` flag is removed.
+  // TODO(bartlomieju): remove in Deno v2.5 and hard error then.
   if flags.unstable_config.legacy_flag_enabled {
-    #[allow(clippy::print_stderr)]
+    log::warn!(
-    if matches!(flags.subcommand, DenoSubcommand::Check(_)) {
+      "⚠️  {}",
-      // can't use log crate because that's not setup yet
+      colors::yellow(
-      eprintln!(
+        "The `--unstable` flag has been removed in Deno 2.0. Use granular `--unstable-*` flags instead.\nLearn more at: https://docs.deno.com/runtime/manual/tools/unstable_flags"
-        "⚠️  {}",
+      )
-        colors::yellow(
+    );
-          "The `--unstable` flag is not needed for `deno check` anymore."
-        )
-      );
-    } else {
-      eprintln!(
-        "⚠️  {}",
-        colors::yellow(
-          "The `--unstable` flag is deprecated and will be removed in Deno 2.0. Use granular `--unstable-*` flags instead.\nLearn more at: https://docs.deno.com/runtime/manual/tools/unstable_flags"
-        )
-      );
-    }
   }
 
   let default_v8_flags = match flags.subcommand {

cli/standalone/binary.rs

@@ -624,7 +624,7 @@ impl<'a> DenoCompileBinaryWriter<'a> {
       },
       node_modules,
       unstable_config: UnstableConfig {
-        legacy_flag_enabled: cli_options.legacy_unstable_flag(),
+        legacy_flag_enabled: false,
         bare_node_builtins: cli_options.unstable_bare_node_builtins(),
         sloppy_imports: cli_options.unstable_sloppy_imports(),
         features: cli_options.unstable_features(),

cli/standalone/mod.rs

@@ -682,12 +682,6 @@ pub async fn run(
   let feature_checker = Arc::new({
     let mut checker = FeatureChecker::default();
     checker.set_exit_cb(Box::new(crate::unstable_exit_cb));
-    // TODO(bartlomieju): enable, once we deprecate `--unstable` in favor
-    // of granular --unstable-* flags.
-    // feature_checker.set_warn_cb(Box::new(crate::unstable_warn_cb));
-    if metadata.unstable_config.legacy_flag_enabled {
-      checker.enable_legacy_unstable();
-    }
     for feature in metadata.unstable_config.features {
       // `metadata` is valid for the whole lifetime of the program, so we
       // can leak the string here.
@@ -733,7 +727,6 @@ pub async fn run(
       seed: metadata.seed,
       unsafely_ignore_certificate_errors: metadata
         .unsafely_ignore_certificate_errors,
-      unstable: metadata.unstable_config.legacy_flag_enabled,
       create_hmr_runner: None,
       create_coverage_collector: None,
       node_ipc: None,

cli/tools/installer.rs

@@ -490,10 +490,6 @@ async fn resolve_shim_data(
     TypeCheckMode::Local => executable_args.push("--check".to_string()),
   }
 
-  if flags.unstable_config.legacy_flag_enabled {
-    executable_args.push("--unstable".to_string());
-  }
-
   for feature in &flags.unstable_config.features {
     executable_args.push(format!("--unstable-{}", feature));
   }
@@ -822,13 +818,7 @@ mod tests {
 
     create_install_shim(
       &HttpClientProvider::new(None, None),
-      &Flags {
+      &Flags::default(),
-        unstable_config: UnstableConfig {
-          legacy_flag_enabled: true,
-          ..Default::default()
-        },
-        ..Flags::default()
-      },
       InstallFlagsGlobal {
         module_url: "http://localhost:4545/echo_server.ts".to_string(),
         args: vec![],
@@ -850,12 +840,11 @@ mod tests {
     let content = fs::read_to_string(file_path).unwrap();
     if cfg!(windows) {
       assert!(content.contains(
-        r#""run" "--unstable" "--no-config" "http://localhost:4545/echo_server.ts""#
+        r#""run" "--no-config" "http://localhost:4545/echo_server.ts""#
       ));
     } else {
-      assert!(content.contains(
+      assert!(content
-        r#"run --unstable --no-config 'http://localhost:4545/echo_server.ts'"#
+        .contains(r#"run --no-config 'http://localhost:4545/echo_server.ts'"#));
-      ));
     }
   }
 
@@ -886,13 +875,7 @@ mod tests {
   async fn install_unstable_legacy() {
     let shim_data = resolve_shim_data(
       &HttpClientProvider::new(None, None),
-      &Flags {
+      &Default::default(),
-        unstable_config: UnstableConfig {
-          legacy_flag_enabled: true,
-          ..Default::default()
-        },
-        ..Default::default()
-      },
       &InstallFlagsGlobal {
         module_url: "http://localhost:4545/echo_server.ts".to_string(),
         args: vec![],
@@ -907,12 +890,7 @@ mod tests {
     assert_eq!(shim_data.name, "echo_server");
     assert_eq!(
       shim_data.args,
-      vec![
+      vec!["run", "--no-config", "http://localhost:4545/echo_server.ts",]
-        "run",
-        "--unstable",
-        "--no-config",
-        "http://localhost:4545/echo_server.ts",
-      ]
     );
   }
 

cli/worker.rs

@@ -112,7 +112,6 @@ pub struct CliMainWorkerOptions {
   pub origin_data_folder_path: Option<PathBuf>,
   pub seed: Option<u64>,
   pub unsafely_ignore_certificate_errors: Option<Vec<String>>,
-  pub unstable: bool,
   pub skip_op_registration: bool,
   pub create_hmr_runner: Option<CreateHmrRunnerCb>,
   pub create_coverage_collector: Option<CreateCoverageCollectorCb>,
@@ -580,7 +579,6 @@ impl CliMainWorkerFactory {
         is_stdout_tty: deno_terminal::is_stdout_tty(),
         is_stderr_tty: deno_terminal::is_stderr_tty(),
         color_level: colors::get_color_level(),
-        unstable: shared.options.unstable,
         unstable_features,
         user_agent: version::DENO_VERSION_INFO.user_agent.to_string(),
         inspect: shared.options.is_inspecting,
@@ -775,7 +773,6 @@ fn create_web_worker_callback(
         color_level: colors::get_color_level(),
         is_stdout_tty: deno_terminal::is_stdout_tty(),
         is_stderr_tty: deno_terminal::is_stderr_tty(),
-        unstable: shared.options.unstable,
         unstable_features,
         user_agent: version::DENO_VERSION_INFO.user_agent.to_string(),
         inspect: shared.options.is_inspecting,

runtime/js/90_deno_ns.js

@@ -194,27 +194,4 @@ denoNsUnstableById[unstableIds.webgpu] = {
 
 // denoNsUnstableById[unstableIds.workerOptions] = { __proto__: null }
 
-// when editing this list, also update unstableDenoProps in cli/tsc/99_main_compiler.js
+export { denoNs, denoNsUnstableById, unstableIds };
-const denoNsUnstable = {
-  listenDatagram: net.createListenDatagram(
-    op_net_listen_udp,
-    op_net_listen_unixpacket,
-  ),
-  umask: fs.umask,
-  HttpClient: httpClient.HttpClient,
-  createHttpClient: httpClient.createHttpClient,
-  dlopen: ffi.dlopen,
-  UnsafeCallback: ffi.UnsafeCallback,
-  UnsafePointer: ffi.UnsafePointer,
-  UnsafePointerView: ffi.UnsafePointerView,
-  UnsafeFnPointer: ffi.UnsafeFnPointer,
-  UnsafeWindowSurface: webgpuSurface.UnsafeWindowSurface,
-  openKv: kv.openKv,
-  AtomicOperation: kv.AtomicOperation,
-  Kv: kv.Kv,
-  KvU64: kv.KvU64,
-  KvListIterator: kv.KvListIterator,
-  cron: cron.cron,
-};
-
-export { denoNs, denoNsUnstable, denoNsUnstableById, unstableIds };

runtime/js/99_main.js

@@ -37,7 +37,6 @@ const {
   ObjectKeys,
   ObjectPrototypeIsPrototypeOf,
   ObjectSetPrototypeOf,
-  ObjectValues,
   PromisePrototypeThen,
   PromiseResolve,
   StringPrototypePadEnd,
@@ -67,7 +66,6 @@ import * as fetch from "ext:deno_fetch/26_fetch.js";
 import * as messagePort from "ext:deno_web/13_message_port.js";
 import {
   denoNs,
-  denoNsUnstable,
   denoNsUnstableById,
   unstableIds,
 } from "ext:runtime/90_deno_ns.js";
@@ -439,28 +437,19 @@ ObjectDefineProperties(globalThis, windowOrWorkerGlobalScope);
 
 // Set up global properties shared by main and worker runtime that are exposed
 // by unstable features if those are enabled.
-function exposeUnstableFeaturesForWindowOrWorkerGlobalScope(options) {
+function exposeUnstableFeaturesForWindowOrWorkerGlobalScope(unstableFeatures) {
-  const { unstableFlag, unstableFeatures } = options;
+  const featureIds = ArrayPrototypeMap(
-  if (unstableFlag) {
+    ObjectKeys(
-    const all = ObjectValues(unstableForWindowOrWorkerGlobalScope);
+      unstableForWindowOrWorkerGlobalScope,
-    for (let i = 0; i <= all.length; i++) {
+    ),
-      const props = all[i];
+    (k) => k | 0,
-      ObjectDefineProperties(globalThis, { ...props });
+  );
-    }
-  } else {
-    const featureIds = ArrayPrototypeMap(
-      ObjectKeys(
-        unstableForWindowOrWorkerGlobalScope,
-      ),
-      (k) => k | 0,
-    );
 
-    for (let i = 0; i <= featureIds.length; i++) {
+  for (let i = 0; i <= featureIds.length; i++) {
-      const featureId = featureIds[i];
+    const featureId = featureIds[i];
-      if (ArrayPrototypeIncludes(unstableFeatures, featureId)) {
+    if (ArrayPrototypeIncludes(unstableFeatures, featureId)) {
-        const props = unstableForWindowOrWorkerGlobalScope[featureId];
+      const props = unstableForWindowOrWorkerGlobalScope[featureId];
-        ObjectDefineProperties(globalThis, { ...props });
+      ObjectDefineProperties(globalThis, { ...props });
-      }
     }
   }
 }
@@ -572,17 +561,16 @@ function bootstrapMainRuntime(runtimeOptions, warmup = false) {
     const {
       0: denoVersion,
       1: location_,
-      2: unstableFlag,
+      2: unstableFeatures,
-      3: unstableFeatures,
+      3: inspectFlag,
-      4: inspectFlag,
+      5: hasNodeModulesDir,
-      6: hasNodeModulesDir,
+      6: argv0,
-      7: argv0,
+      7: nodeDebug,
-      8: nodeDebug,
+      8: mode,
-      9: mode,
+      9: servePort,
-      10: servePort,
+      10: serveHost,
-      11: serveHost,
+      11: serveIsMain,
-      12: serveIsMain,
+      12: serveWorkerCount,
-      13: serveWorkerCount,
     } = runtimeOptions;
 
     if (mode === executionModes.serve) {
@@ -692,10 +680,7 @@ function bootstrapMainRuntime(runtimeOptions, warmup = false) {
       location.setLocationHref(location_);
     }
 
-    exposeUnstableFeaturesForWindowOrWorkerGlobalScope({
+    exposeUnstableFeaturesForWindowOrWorkerGlobalScope(unstableFeatures);
-      unstableFlag,
-      unstableFeatures,
-    });
     ObjectDefineProperties(globalThis, mainRuntimeGlobalProperties);
     ObjectDefineProperties(globalThis, {
       // TODO(bartlomieju): in the future we might want to change the
@@ -742,14 +727,9 @@ function bootstrapMainRuntime(runtimeOptions, warmup = false) {
       },
     });
 
-    // TODO(bartlomieju): deprecate --unstable
+    for (let i = 0; i <= unstableFeatures.length; i++) {
-    if (unstableFlag) {
+      const id = unstableFeatures[i];
-      ObjectAssign(finalDenoNs, denoNsUnstable);
+      ObjectAssign(finalDenoNs, denoNsUnstableById[id]);
-    } else {
-      for (let i = 0; i <= unstableFeatures.length; i++) {
-        const id = unstableFeatures[i];
-        ObjectAssign(finalDenoNs, denoNsUnstableById[id]);
-      }
     }
 
     if (!ArrayPrototypeIncludes(unstableFeatures, unstableIds.unsafeProto)) {
@@ -825,12 +805,11 @@ function bootstrapWorkerRuntime(
     const {
       0: denoVersion,
       1: location_,
-      2: unstableFlag,
+      2: unstableFeatures,
-      3: unstableFeatures,
+      4: enableTestingFeaturesFlag,
-      5: enableTestingFeaturesFlag,
+      5: hasNodeModulesDir,
-      6: hasNodeModulesDir,
+      6: argv0,
-      7: argv0,
+      7: nodeDebug,
-      8: nodeDebug,
     } = runtimeOptions;
 
     // TODO(iuioiua): remove in Deno v2. This allows us to dynamically delete
@@ -846,10 +825,7 @@ function bootstrapWorkerRuntime(
     delete globalThis.bootstrap;
     hasBootstrapped = true;
 
-    exposeUnstableFeaturesForWindowOrWorkerGlobalScope({
+    exposeUnstableFeaturesForWindowOrWorkerGlobalScope(unstableFeatures);
-      unstableFlag,
-      unstableFeatures,
-    });
     ObjectDefineProperties(globalThis, workerRuntimeGlobalProperties);
     ObjectDefineProperties(globalThis, {
       name: core.propWritable(name),
@@ -891,14 +867,9 @@ function bootstrapWorkerRuntime(
     globalThis.pollForMessages = pollForMessages;
     globalThis.hasMessageEventListener = hasMessageEventListener;
 
-    // TODO(bartlomieju): deprecate --unstable
+    for (let i = 0; i <= unstableFeatures.length; i++) {
-    if (unstableFlag) {
+      const id = unstableFeatures[i];
-      ObjectAssign(finalDenoNs, denoNsUnstable);
+      ObjectAssign(finalDenoNs, denoNsUnstableById[id]);
-    } else {
-      for (let i = 0; i <= unstableFeatures.length; i++) {
-        const id = unstableFeatures[i];
-        ObjectAssign(finalDenoNs, denoNsUnstableById[id]);
-      }
     }
 
     // Not available in workers

runtime/ops/bootstrap.rs

@@ -95,11 +95,7 @@ pub fn op_bootstrap_user_agent(state: &mut OpState) -> String {
 #[serde]
 pub fn op_bootstrap_unstable_args(state: &mut OpState) -> Vec<String> {
   let options = state.borrow::<BootstrapOptions>();
-  if options.unstable {
+  let mut flags = Vec::with_capacity(options.unstable_features.len());
-    return vec!["--unstable".to_string()];
-  }
-
-  let mut flags = Vec::new();
   for granular_flag in crate::UNSTABLE_GRANULAR_FLAGS.iter() {
     if options.unstable_features.contains(&granular_flag.id) {
       flags.push(format!("--unstable-{}", granular_flag.name));

runtime/worker_bootstrap.rs

@@ -106,8 +106,6 @@ pub struct BootstrapOptions {
   pub is_stdout_tty: bool,
   pub is_stderr_tty: bool,
   pub color_level: deno_terminal::colors::ColorLevel,
-  // --unstable flag, deprecated
-  pub unstable: bool,
   // --unstable-* flags
   pub unstable_features: Vec<i32>,
   pub user_agent: String,
@@ -144,7 +142,6 @@ impl Default for BootstrapOptions {
       log_level: Default::default(),
       locale: "en".to_string(),
       location: Default::default(),
-      unstable: Default::default(),
       unstable_features: Default::default(),
       inspect: Default::default(),
       args: Default::default(),
@@ -174,8 +171,6 @@ struct BootstrapV8<'a>(
   &'a str,
   // location
   Option<&'a str>,
-  // unstable
-  bool,
   // granular unstable flags
   &'a [i32],
   // inspect
@@ -213,7 +208,6 @@ impl BootstrapOptions {
     let bootstrap = BootstrapV8(
       &self.deno_version,
       self.location.as_ref().map(|l| l.as_str()),
-      self.unstable,
       self.unstable_features.as_ref(),
       self.inspect,
       self.enable_testing_features,

tests/integration/node_unit_tests.rs

@@ -111,7 +111,9 @@ fn node_unit_test(test: String) {
     .arg("--config")
     .arg(deno_config_path())
     .arg("--no-lock")
-    .arg("--unstable")
+    .arg("--unstable-broadcast-channel")
+    .arg("--unstable-http")
+    .arg("--unstable-net")
     // TODO(kt3k): This option is required to pass tls_test.ts,
     // but this shouldn't be necessary. tls.connect currently doesn't
     // pass hostname option correctly and it causes cert errors.

tests/integration/run_tests.rs

@@ -4338,7 +4338,7 @@ async fn websocketstream_ping() {
 
   let child = util::deno_cmd()
     .arg("test")
-    .arg("--unstable")
+    .arg("--unstable-net")
     .arg("--allow-net")
     .arg("--cert")
     .arg(root_ca)

tests/specs/run/045_proxy/proxy_test.ts

@@ -108,7 +108,7 @@ async function testFetchProgrammaticProxy() {
       "--quiet",
       "--reload",
       "--allow-net=localhost:4545,localhost:4555",
-      "--unstable",
+      "--unstable-http",
       "programmatic_proxy_client.ts",
     ],
   }).output();