feat(unstable): Workspaces support (#20410)

This commit adds unstable workspace support. This is extremely
bare-bones and
minimal first-pass at this.

With this change `deno.json` supports specifying `workspaces` key, that
accepts a list of subdirectories. Each workspace can have its own import
map. It's required to specify a `"name"` and `"version"` properties in the
configuration file for the workspace:

```jsonc
// deno.json
{
  "workspaces": [
     "a",
     "b"
  },
  "imports": {
    "express": "npm:express@5"
   }
}
```
``` jsonc
// a/deno.json
{
  "name": "a",
  "version": "1.0.2",
  "imports": {
    "kleur": "npm:kleur"
  }
}
```
```jsonc
// b/deno.json
{
  "name": "b",
  "version": "0.51.0",
  "imports": {
    "chalk": "npm:chalk"
  }
}
```

`--unstable-workspaces` flag is required to use this feature:
```
$ deno run --unstable-workspaces mod.ts
```

---------

Co-authored-by: David Sherret <dsherret@gmail.com>

38 files changed, 317 insertions, 24 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 545b8d697..11775d274 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1061,16 +1061,15 @@ dependencies = [
 
 [[package]]
 name = "deno_config"
-version = "0.5.0"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f4dd27020827a51857fbb47a21d2359f75db031e177821bff4e95368333a5a0"
+checksum = "40c6b9137fcc5c6f81d12214fc31cdddf2c64d0667a5458803e081ddd856d5b6"
 dependencies = [
  "anyhow",
  "indexmap 2.0.2",
  "jsonc-parser",
  "log",
  "percent-encoding",
- "pretty_assertions",
  "serde",
  "serde_json",
  "url",
@@ -1156,9 +1155,9 @@ dependencies = [
 
 [[package]]
 name = "deno_doc"
-version = "0.73.1"
+version = "0.73.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0caa44ce342fb69b449ae750f8bf66dea6730ce7a00cc4449766d47b8626faf9"
+checksum = "d2854646e9edfea295844b392ab64b7f4fb7b25b608c82d40a2c2d39655b71db"
 dependencies = [
  "anyhow",
  "cfg-if",
@@ -1179,9 +1178,9 @@ dependencies = [
 
 [[package]]
 name = "deno_emit"
-version = "0.31.3"
+version = "0.31.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "193d738bbe06f950a7be3f852f0d940839bba6f4c2cb1d2019eb0d6c727f7b03"
+checksum = "f8910a6da498d0eb2a28d9ea613c47291a86377a85b3771dd90d624004814aeb"
 dependencies = [
  "anyhow",
  "base64 0.13.1",
@@ -1246,9 +1245,9 @@ dependencies = [
 
 [[package]]
 name = "deno_graph"
-version = "0.61.0"
+version = "0.61.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bd6700dd3cec2a7763760168c952cc632246a1ae0fc52d6f297e2802b994e69"
+checksum = "076c0b611c10901456b78c837408b9c40fe0c3602e767307d986f46f0cc56b51"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -2865,11 +2864,10 @@ checksum = "cb56e1aa765b4b4f3aadfab769793b7087bb03a4ea4920644a6d238e2df5b9ed"
 
 [[package]]
 name = "import_map"
-version = "0.15.0"
+version = "0.17.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "632089ec08bd62e807311104122fb26d5c911ab172e2b9864be154a575979e29"
+checksum = "1e5bf51a0adfdc08afcb9e5a1c8f8c804227ec50d493c65e57e6d117d594bd1b"
 dependencies = [
- "cfg-if",
  "indexmap 1.9.3",
  "log",
  "serde",
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index c13e1bf91..37250f328 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -51,11 +51,11 @@ winres.workspace = true
 [dependencies]
 deno_ast = { workspace = true, features = ["bundler", "cjs", "codegen", "dep_graph", "module_specifier", "proposal", "react", "sourcemap", "transforms", "typescript", "view", "visit"] }
 deno_cache_dir = "=0.6.1"
-deno_config = "=0.5.0"
+deno_config = "=0.6.4"
 deno_core = { workspace = true, features = ["include_js_files_for_snapshotting"] }
-deno_doc = { version = "=0.73.1", features = ["html"] }
-deno_emit = "=0.31.3"
-deno_graph = "=0.61.0"
+deno_doc = { version = "=0.73.2", features = ["html"] }
+deno_emit = "=0.31.4"
+deno_graph = "=0.61.1"
 deno_lint = { version = "=0.52.2", features = ["docs"] }
 deno_lockfile.workspace = true
 deno_npm = "0.15.2"
@@ -95,7 +95,7 @@ glob = "0.3.1"
 hex.workspace = true
 http.workspace = true
 hyper.workspace = true
-import_map = "=0.15.0"
+import_map = { version = "=0.17.0", features = ["ext"] }
 indexmap.workspace = true
 jsonc-parser = { version = "=0.21.1", features = ["serde"] }
 lazy-regex.workspace = true
diff --git a/cli/args/flags.rs b/cli/args/flags.rs
index 235743bda..6d1e41a19 100644
--- a/cli/args/flags.rs
+++ b/cli/args/flags.rs
@@ -431,6 +431,7 @@ pub struct Flags {
   pub unstable: bool,
   pub unstable_bare_node_builtins: bool,
   pub unstable_byonm: bool,
+  pub unstable_workspaces: bool,
   pub unstable_features: Vec<String>,
   pub unsafely_ignore_certificate_errors: Option<Vec<String>>,
   pub v8_flags: Vec<String>,
@@ -871,6 +872,7 @@ pub fn flags_from_vec(args: Vec<String>) -> clap::error::Result<Flags> {
   flags.unstable_bare_node_builtins =
     matches.get_flag("unstable-bare-node-builtins");
   flags.unstable_byonm = matches.get_flag("unstable-byonm");
+  flags.unstable_workspaces = matches.get_flag("unstable-workspaces");
 
   if matches.get_flag("quiet") {
     flags.log_level = Some(Level::Error);
@@ -984,6 +986,15 @@ fn clap_root() -> Command {
         .value_parser(FalseyValueParser::new())
         .action(ArgAction::SetTrue)
         .global(true),
+    )
+    .arg(
+      Arg::new("unstable-workspaces")
+        .long("unstable-workspaces")
+        .help("Enable unstable 'workspaces' feature")
+        .env("DENO_UNSTABLE_WORKSPACES")
+        .value_parser(FalseyValueParser::new())
+        .action(ArgAction::SetTrue)
+        .global(true),
     );
 
   for (flag_name, help, _) in crate::UNSTABLE_GRANULAR_FLAGS {
diff --git a/cli/args/import_map.rs b/cli/args/import_map.rs
index 9d1b2bbda..5ebb425eb 100644
--- a/cli/args/import_map.rs
+++ b/cli/args/import_map.rs
@@ -36,7 +36,7 @@ pub async fn resolve_import_map_from_specifier(
   import_map_from_value(specifier, value)
 }
 
-fn import_map_from_value(
+pub fn import_map_from_value(
   specifier: &Url,
   json_value: serde_json::Value,
 ) -> Result<ImportMap, AnyError> {
diff --git a/cli/args/mod.rs b/cli/args/mod.rs
index 24d1237aa..dd8de2a6f 100644
--- a/cli/args/mod.rs
+++ b/cli/args/mod.rs
@@ -29,6 +29,7 @@ pub use deno_config::TsConfig;
 pub use deno_config::TsConfigForEmit;
 pub use deno_config::TsConfigType;
 pub use deno_config::TsTypeLib;
+pub use deno_config::WorkspaceConfig;
 pub use flags::*;
 pub use lockfile::Lockfile;
 pub use lockfile::LockfileError;
@@ -619,6 +620,7 @@ pub struct CliOptions {
   maybe_package_json: Option<PackageJson>,
   maybe_lockfile: Option<Arc<Mutex<Lockfile>>>,
   overrides: CliOptionOverrides,
+  maybe_workspace_config: Option<WorkspaceConfig>,
 }
 
 impl CliOptions {
@@ -652,6 +654,20 @@ impl CliOptions {
     .with_context(|| "Resolving node_modules folder.")?;
     let maybe_vendor_folder =
       resolve_vendor_folder(&initial_cwd, &flags, maybe_config_file.as_ref());
+    let maybe_workspace_config =
+      if let Some(config_file) = maybe_config_file.as_ref() {
+        config_file.to_workspace_config()?
+      } else {
+        None
+      };
+
+    // TODO(bartlomieju): remove in v1.39 or v1.40.
+    if let Some(wsconfig) = &maybe_workspace_config {
+      if !wsconfig.members.is_empty() && !flags.unstable_workspaces {
+        eprintln!("Use of unstable 'workspaces' feature. The --unstable-workspaces flags must be provided.");
+        std::process::exit(70);
+      }
+    }
 
     if let Some(env_file_name) = &flags.env_file {
       if (from_filename(env_file_name)).is_err() {
@@ -668,6 +684,7 @@ impl CliOptions {
       maybe_node_modules_folder,
       maybe_vendor_folder,
       overrides: Default::default(),
+      maybe_workspace_config,
     })
   }
 
@@ -813,6 +830,41 @@ impl CliOptions {
     &self,
     file_fetcher: &FileFetcher,
   ) -> Result<Option<ImportMap>, AnyError> {
+    if let Some(workspace_config) = self.maybe_workspace_config.as_ref() {
+      let base_import_map_config = ::import_map::ext::ImportMapConfig {
+        base_url: self.maybe_config_file.as_ref().unwrap().specifier.clone(),
+        import_map_value: workspace_config.base_import_map_value.clone(),
+      };
+      let children_configs = workspace_config
+        .members
+        .iter()
+        .map(|member| {
+          let import_map_value = member.config_file.to_import_map_value();
+          ::import_map::ext::ImportMapConfig {
+            base_url: member.config_file.specifier.clone(),
+            import_map_value,
+          }
+        })
+        .collect();
+
+      let maybe_import_map = ::import_map::ext::create_synthetic_import_map(
+        base_import_map_config,
+        children_configs,
+      );
+      if let Some((_import_map_url, import_map)) = maybe_import_map {
+        log::debug!(
+          "Workspace config generated this import map {}",
+          serde_json::to_string_pretty(&import_map).unwrap()
+        );
+        return import_map::import_map_from_value(
+          // TODO(bartlomieju): maybe should be stored on the workspace config?
+          &self.maybe_config_file.as_ref().unwrap().specifier,
+          import_map,
+        )
+        .map(Some);
+      }
+    }
+
     let import_map_specifier = match self.resolve_import_map_specifier()? {
       Some(specifier) => specifier,
       None => return Ok(None),
@@ -940,6 +992,7 @@ impl CliOptions {
       maybe_config_file: self.maybe_config_file.clone(),
       maybe_package_json: self.maybe_package_json.clone(),
       maybe_lockfile: self.maybe_lockfile.clone(),
+      maybe_workspace_config: self.maybe_workspace_config.clone(),
       overrides: self.overrides.clone(),
     }
   }
@@ -1037,6 +1090,10 @@ impl CliOptions {
     &self.maybe_config_file
   }
 
+  pub fn maybe_workspace_config(&self) -> &Option<WorkspaceConfig> {
+    &self.maybe_workspace_config
+  }
+
   pub fn maybe_package_json(&self) -> &Option<PackageJson> {
     &self.maybe_package_json
   }
diff --git a/cli/graph_util.rs b/cli/graph_util.rs
index f2713a9db..727037748 100644
--- a/cli/graph_util.rs
+++ b/cli/graph_util.rs
@@ -19,6 +19,7 @@ use crate::util::sync::TaskQueue;
 use crate::util::sync::TaskQueuePermit;
 
 use deno_core::anyhow::bail;
+use deno_core::anyhow::Context;
 use deno_core::error::custom_error;
 use deno_core::error::AnyError;
 use deno_core::parking_lot::Mutex;
@@ -269,6 +270,12 @@ impl ModuleGraphBuilder {
     options: CreateGraphOptions<'_>,
   ) -> Result<deno_graph::ModuleGraph, AnyError> {
     let maybe_imports = self.options.to_maybe_imports()?;
+    let maybe_workspace_config = self.options.maybe_workspace_config();
+    let workspace_members = if let Some(wc) = maybe_workspace_config {
+      workspace_config_to_workspace_members(wc)?
+    } else {
+      vec![]
+    };
 
     let cli_resolver = self.resolver.clone();
     let graph_resolver = cli_resolver.as_graph_resolver();
@@ -291,8 +298,7 @@ impl ModuleGraphBuilder {
           npm_resolver: Some(graph_npm_resolver),
           module_analyzer: Some(options.analyzer),
           reporter: maybe_file_watcher_reporter,
-          // todo(dsherret): workspace support
-          workspace_members: vec![],
+          workspace_members,
         },
       )
       .await?;
@@ -312,6 +318,12 @@ impl ModuleGraphBuilder {
   ) -> Result<Arc<deno_graph::ModuleGraph>, AnyError> {
     let mut cache = self.create_graph_loader();
     let maybe_imports = self.options.to_maybe_imports()?;
+    let maybe_workspace_config = self.options.maybe_workspace_config();
+    let workspace_members = if let Some(wc) = maybe_workspace_config {
+      workspace_config_to_workspace_members(wc)?
+    } else {
+      vec![]
+    };
     let cli_resolver = self.resolver.clone();
     let graph_resolver = cli_resolver.as_graph_resolver();
     let graph_npm_resolver = cli_resolver.as_graph_npm_resolver();
@@ -336,8 +348,7 @@ impl ModuleGraphBuilder {
           npm_resolver: Some(graph_npm_resolver),
           module_analyzer: Some(&analyzer),
           reporter: maybe_file_watcher_reporter,
-          // todo(dsherret): workspace support
-          workspace_members: vec![],
+          workspace_members,
         },
       )
       .await?;
@@ -719,6 +730,46 @@ impl deno_graph::source::Reporter for FileWatcherReporter {
   }
 }
 
+pub fn workspace_config_to_workspace_members(
+  workspace_config: &deno_config::WorkspaceConfig,
+) -> Result<Vec<deno_graph::WorkspaceMember>, AnyError> {
+  workspace_config
+    .members
+    .iter()
+    .map(|member| {
+      workspace_member_config_try_into_workspace_member(member).with_context(
+        || {
+          format!(
+            "Failed to resolve configuration for '{}' workspace member at '{}'",
+            member.member_name,
+            member.config_file.specifier.as_str()
+          )
+        },
+      )
+    })
+    .collect()
+}
+
+fn workspace_member_config_try_into_workspace_member(
+  config: &deno_config::WorkspaceMemberConfig,
+) -> Result<deno_graph::WorkspaceMember, AnyError> {
+  let nv = deno_semver::package::PackageNv {
+    name: config.package_name.clone(),
+    version: deno_semver::Version::parse_standard(&config.package_version)?,
+  };
+  Ok(deno_graph::WorkspaceMember {
+    base: ModuleSpecifier::from_directory_path(&config.path).unwrap(),
+    nv,
+    exports: config
+      .config_file
+      .to_exports_config()?
+      .into_map()
+      // todo(dsherret): deno_graph should use an IndexMap
+      .into_iter()
+      .collect(),
+  })
+}
+
 #[cfg(test)]
 mod test {
   use std::sync::Arc;
diff --git a/cli/module_loader.rs b/cli/module_loader.rs
index c8b2a36df..d8ab2d8c9 100644
--- a/cli/module_loader.rs
+++ b/cli/module_loader.rs
@@ -8,6 +8,7 @@ use crate::cache::ParsedSourceCache;
 use crate::emit::Emitter;
 use crate::graph_util::graph_lock_or_exit;
 use crate::graph_util::graph_valid_with_cli_options;
+use crate::graph_util::workspace_config_to_workspace_members;
 use crate::graph_util::FileWatcherReporter;
 use crate::graph_util::ModuleGraphBuilder;
 use crate::graph_util::ModuleGraphContainer;
@@ -119,6 +120,12 @@ impl ModuleLoadPreparer {
 
     let mut cache = self.module_graph_builder.create_fetch_cacher(permissions);
     let maybe_imports = self.options.to_maybe_imports()?;
+    let maybe_workspace_config = self.options.maybe_workspace_config();
+    let workspace_members = if let Some(wc) = maybe_workspace_config {
+      workspace_config_to_workspace_members(wc)?
+    } else {
+      vec![]
+    };
     let graph_resolver = self.resolver.as_graph_resolver();
     let graph_npm_resolver = self.resolver.as_graph_npm_resolver();
     let maybe_file_watcher_reporter = self
@@ -152,8 +159,7 @@ impl ModuleLoadPreparer {
           npm_resolver: Some(graph_npm_resolver),
           module_analyzer: Some(&analyzer),
           reporter: maybe_file_watcher_reporter,
-          // todo(dsherret): workspace support
-          workspace_members: vec![],
+          workspace_members,
         },
       )
       .await?;
diff --git a/cli/tests/integration/run_tests.rs b/cli/tests/integration/run_tests.rs
index c24464eba..306d4df67 100644
--- a/cli/tests/integration/run_tests.rs
+++ b/cli/tests/integration/run_tests.rs
@@ -4759,3 +4759,32 @@ itest!(explicit_resource_management {
   args: "run --quiet --check run/explicit_resource_management/main.ts",
   output: "run/explicit_resource_management/main.out",
 });
+
+itest!(workspaces_basic {
+  args: "run -L debug -A --unstable-workspaces main.ts",
+  output: "run/workspaces/basic/main.out",
+  cwd: Some("run/workspaces/basic/"),
+  copy_temp_dir: Some("run/workspaces/basic/"),
+  envs: env_vars_for_npm_tests(),
+  http_server: true,
+});
+
+itest!(workspaces_member_outside_root_dir {
+  args: "run -A --unstable-workspaces main.ts",
+  output: "run/workspaces/member_outside_root_dir/main.out",
+  cwd: Some("run/workspaces/member_outside_root_dir/"),
+  copy_temp_dir: Some("run/workspaces/member_outside_root_dir/"),
+  envs: env_vars_for_npm_tests(),
+  http_server: true,
+  exit_code: 1,
+});
+
+itest!(workspaces_nested_member {
+  args: "run -A --unstable-workspaces main.ts",
+  output: "run/workspaces/nested_member/main.out",
+  cwd: Some("run/workspaces/nested_member/"),
+  copy_temp_dir: Some("run/workspaces/nested_member/"),
+  envs: env_vars_for_npm_tests(),
+  http_server: true,
+  exit_code: 1,
+});
diff --git a/cli/tests/testdata/run/workspaces/basic/bar/deno.json b/cli/tests/testdata/run/workspaces/basic/bar/deno.json
new file mode 100644
index 000000000..ef3bfc37a
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/bar/deno.json
@@ -0,0 +1,8 @@
+{
+  "name": "asdfasdfasdf",
+  "version": "0.0.0",
+  "imports": {
+    "@/": "./",
+    "secret_mod/": "./some_mod/"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/basic/bar/fizz/buzz.ts b/cli/tests/testdata/run/workspaces/basic/bar/fizz/buzz.ts
new file mode 100644
index 000000000..f88d62fcc
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/bar/fizz/buzz.ts
@@ -0,0 +1 @@
+export const buzz = "buzz from bar";
diff --git a/cli/tests/testdata/run/workspaces/basic/bar/mod.ts b/cli/tests/testdata/run/workspaces/basic/bar/mod.ts
new file mode 100644
index 000000000..6f898e389
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/bar/mod.ts
@@ -0,0 +1,5 @@
+import { hello } from "secret_mod/hello.ts";
+import { buzz } from "@/fizz/buzz.ts";
+
+console.log(hello);
+console.log(buzz);
diff --git a/cli/tests/testdata/run/workspaces/basic/bar/some_mod/hello.ts b/cli/tests/testdata/run/workspaces/basic/bar/some_mod/hello.ts
new file mode 100644
index 000000000..1013de8d2
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/bar/some_mod/hello.ts
@@ -0,0 +1 @@
+export const hello = "hello from bar";
diff --git a/cli/tests/testdata/run/workspaces/basic/deno.json b/cli/tests/testdata/run/workspaces/basic/deno.json
new file mode 100644
index 000000000..b971c4f3d
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/deno.json
@@ -0,0 +1,9 @@
+{
+  "workspaces": [
+    "foo",
+    "bar"
+  ],
+  "imports": {
+    "chalk": "npm:chalk"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/basic/foo/bar/hello.ts b/cli/tests/testdata/run/workspaces/basic/foo/bar/hello.ts
new file mode 100644
index 000000000..c8a7e57c4
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/foo/bar/hello.ts
@@ -0,0 +1 @@
+export const hello = "hello from foo";
diff --git a/cli/tests/testdata/run/workspaces/basic/foo/deno.json b/cli/tests/testdata/run/workspaces/basic/foo/deno.json
new file mode 100644
index 000000000..46d84f06f
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/foo/deno.json
@@ -0,0 +1,8 @@
+{
+  "name": "qwerqwer",
+  "version": "0.0.0",
+  "imports": {
+    "~/": "./",
+    "foo/": "./bar/"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/basic/foo/fizz/buzz.ts b/cli/tests/testdata/run/workspaces/basic/foo/fizz/buzz.ts
new file mode 100644
index 000000000..4e03777d1
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/foo/fizz/buzz.ts
@@ -0,0 +1 @@
+export const buzz = "buzz from foo";
diff --git a/cli/tests/testdata/run/workspaces/basic/foo/mod.ts b/cli/tests/testdata/run/workspaces/basic/foo/mod.ts
new file mode 100644
index 000000000..d7b16dcc0
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/foo/mod.ts
@@ -0,0 +1,5 @@
+import { hello } from "foo/hello.ts";
+import { buzz } from "~/fizz/buzz.ts";
+
+console.log(hello);
+console.log(buzz);
diff --git a/cli/tests/testdata/run/workspaces/basic/main.out b/cli/tests/testdata/run/workspaces/basic/main.out
new file mode 100644
index 000000000..77e0de4d1
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/main.out
@@ -0,0 +1,21 @@
+[WILDCARD]Workspace config generated this import map {
+  "imports": {
+    "chalk": "npm:chalk"
+  },
+  "scopes": {
+    "./foo/": {
+      "~/": "./foo/",
+      "foo/": "./foo/bar/"
+    },
+    "./bar/": {
+      "@/": "./bar/",
+      "secret_mod/": "./bar/some_mod/"
+    }
+  }
+}
+[WILDCARD]
+hello from foo
+buzz from foo
+hello from bar
+buzz from bar
+[Function: chalk][WILDCARD]
\ No newline at end of file
diff --git a/cli/tests/testdata/run/workspaces/basic/main.ts b/cli/tests/testdata/run/workspaces/basic/main.ts
new file mode 100644
index 000000000..380c97619
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/basic/main.ts
@@ -0,0 +1,5 @@
+import chalk from "chalk";
+import "./foo/mod.ts";
+import "./bar/mod.ts";
+
+console.log(chalk);
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/deno.json b/cli/tests/testdata/run/workspaces/member_outside_root_dir/deno.json
new file mode 100644
index 000000000..25feefad8
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/deno.json
@@ -0,0 +1,9 @@
+{
+  "workspaces": [
+    "foo",
+    "../other_folder"
+  ],
+  "imports": {
+    "chalk": "npm:chalk"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/bar/hello.ts b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/bar/hello.ts
new file mode 100644
index 000000000..c8a7e57c4
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/bar/hello.ts
@@ -0,0 +1 @@
+export const hello = "hello from foo";
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/deno.json b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/deno.json
new file mode 100644
index 000000000..46d84f06f
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/deno.json
@@ -0,0 +1,8 @@
+{
+  "name": "qwerqwer",
+  "version": "0.0.0",
+  "imports": {
+    "~/": "./",
+    "foo/": "./bar/"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/fizz/buzz.ts b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/fizz/buzz.ts
new file mode 100644
index 000000000..4e03777d1
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/fizz/buzz.ts
@@ -0,0 +1 @@
+export const buzz = "buzz from foo";
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/mod.ts b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/mod.ts
new file mode 100644
index 000000000..d7b16dcc0
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/foo/mod.ts
@@ -0,0 +1,5 @@
+import { hello } from "foo/hello.ts";
+import { buzz } from "~/fizz/buzz.ts";
+
+console.log(hello);
+console.log(buzz);
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.out b/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.out
new file mode 100644
index 000000000..205d95aea
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.out
@@ -0,0 +1 @@
+error: Workspace member '../other_folder' is outside root configuration directory[WILDCARD]
\ No newline at end of file
diff --git a/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.ts b/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.ts
new file mode 100644
index 000000000..182fd8517
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/member_outside_root_dir/main.ts
@@ -0,0 +1,4 @@
+import chalk from "chalk";
+import "./foo/mod.ts";
+
+console.log(chalk);
diff --git a/cli/tests/testdata/run/workspaces/nested_member/bar/deno.json b/cli/tests/testdata/run/workspaces/nested_member/bar/deno.json
new file mode 100644
index 000000000..ef3bfc37a
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/bar/deno.json
@@ -0,0 +1,8 @@
+{
+  "name": "asdfasdfasdf",
+  "version": "0.0.0",
+  "imports": {
+    "@/": "./",
+    "secret_mod/": "./some_mod/"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/nested_member/bar/fizz/buzz.ts b/cli/tests/testdata/run/workspaces/nested_member/bar/fizz/buzz.ts
new file mode 100644
index 000000000..f88d62fcc
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/bar/fizz/buzz.ts
@@ -0,0 +1 @@
+export const buzz = "buzz from bar";
diff --git a/cli/tests/testdata/run/workspaces/nested_member/bar/mod.ts b/cli/tests/testdata/run/workspaces/nested_member/bar/mod.ts
new file mode 100644
index 000000000..6f898e389
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/bar/mod.ts
@@ -0,0 +1,5 @@
+import { hello } from "secret_mod/hello.ts";
+import { buzz } from "@/fizz/buzz.ts";
+
+console.log(hello);
+console.log(buzz);
diff --git a/cli/tests/testdata/run/workspaces/nested_member/bar/some_mod/hello.ts b/cli/tests/testdata/run/workspaces/nested_member/bar/some_mod/hello.ts
new file mode 100644
index 000000000..1013de8d2
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/bar/some_mod/hello.ts
@@ -0,0 +1 @@
+export const hello = "hello from bar";
diff --git a/cli/tests/testdata/run/workspaces/nested_member/deno.json b/cli/tests/testdata/run/workspaces/nested_member/deno.json
new file mode 100644
index 000000000..6d9c09d4d
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/deno.json
@@ -0,0 +1,6 @@
+{
+  "workspaces": [
+    "foo",
+    "foo/bar"
+  ]
+}
diff --git a/cli/tests/testdata/run/workspaces/nested_member/foo/bar/deno.json b/cli/tests/testdata/run/workspaces/nested_member/foo/bar/deno.json
new file mode 100644
index 000000000..d40328b36
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/foo/bar/deno.json
@@ -0,0 +1,7 @@
+{
+  "name": "bar",
+  "version": "0.0.0",
+  "imports": {
+    "chalk": "npm:chalk"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/nested_member/foo/bar/hello.ts b/cli/tests/testdata/run/workspaces/nested_member/foo/bar/hello.ts
new file mode 100644
index 000000000..9c1023153
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/foo/bar/hello.ts
@@ -0,0 +1,3 @@
+import chalk from "chalk";
+
+export default chalk;
diff --git a/cli/tests/testdata/run/workspaces/nested_member/foo/deno.json b/cli/tests/testdata/run/workspaces/nested_member/foo/deno.json
new file mode 100644
index 000000000..68e053b02
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/foo/deno.json
@@ -0,0 +1,7 @@
+{
+  "name": "qwerqwer",
+  "version": "0.0.0",
+  "imports": {
+    "~/": "./"
+  }
+}
diff --git a/cli/tests/testdata/run/workspaces/nested_member/foo/fizz/buzz.ts b/cli/tests/testdata/run/workspaces/nested_member/foo/fizz/buzz.ts
new file mode 100644
index 000000000..4e03777d1
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/foo/fizz/buzz.ts
@@ -0,0 +1 @@
+export const buzz = "buzz from foo";
diff --git a/cli/tests/testdata/run/workspaces/nested_member/foo/mod.ts b/cli/tests/testdata/run/workspaces/nested_member/foo/mod.ts
new file mode 100644
index 000000000..b9d4d3c04
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/foo/mod.ts
@@ -0,0 +1,3 @@
+import { buzz } from "~/fizz/buzz.ts";
+
+console.log(buzz);
diff --git a/cli/tests/testdata/run/workspaces/nested_member/main.out b/cli/tests/testdata/run/workspaces/nested_member/main.out
new file mode 100644
index 000000000..98598a306
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/main.out
@@ -0,0 +1 @@
+error: Workspace member 'foo/bar' is nested within other workspace member 'foo'
diff --git a/cli/tests/testdata/run/workspaces/nested_member/main.ts b/cli/tests/testdata/run/workspaces/nested_member/main.ts
new file mode 100644
index 000000000..2bf53f7c2
--- /dev/null
+++ b/cli/tests/testdata/run/workspaces/nested_member/main.ts
@@ -0,0 +1,4 @@
+import "./foo/mod.ts";
+import chalk from "./foo/bar/hello.ts";
+
+console.log(chalk);