feat: npm workspace and better Deno workspace support (#24334)

Adds much better support for the unstable Deno workspaces as well as
support for npm workspaces. npm workspaces is still lacking in that we
only install packages into the root node_modules folder. We'll make it
smarter over time in order for it to figure out when to add node_modules
folders within packages.

This includes a breaking change in config file resolution where we stop
searching for config files on the first found package.json unless it's
in a workspace. For the previous behaviour, the root deno.json needs to
be updated to be a workspace by adding `"workspace":
["./path-to-pkg-json-folder-goes-here"]`. See details in
https://github.com/denoland/deno_config/pull/66

Closes #24340
Closes #24159
Closes #24161
Closes #22020
Closes #18546
Closes #16106
Closes #24160

9 files changed, 57 insertions, 0 deletions

diff --git a/tests/specs/check/workspace/__test__.jsonc b/tests/specs/check/workspace/__test__.jsonc
new file mode 100644
index 000000000..5df2fd70e
--- /dev/null
+++ b/tests/specs/check/workspace/__test__.jsonc
@@ -0,0 +1,22 @@
+{
+  "tests": {
+    "root": {
+      // todo(dsherret): should be possible to not provide args here
+      "args": "check package-a/mod.ts package-b/mod.ts",
+      "output": "root.out",
+      "exitCode": 1
+    },
+    "package_a": {
+      "args": "check mod.ts",
+      "cwd": "package-a",
+      "output": "package_a.out",
+      "exitCode": 0
+    },
+    "package_b": {
+      "args": "check mod.ts",
+      "cwd": "package-b",
+      "output": "package_b.out",
+      "exitCode": 1
+    }
+  }
+}
diff --git a/tests/specs/check/workspace/deno.json b/tests/specs/check/workspace/deno.json
new file mode 100644
index 000000000..b72d88442
--- /dev/null
+++ b/tests/specs/check/workspace/deno.json
@@ -0,0 +1,6 @@
+{
+  "workspace": [
+    "./package-a",
+    "./package-b"
+  ]
+}
diff --git a/tests/specs/check/workspace/package-a/deno.json b/tests/specs/check/workspace/package-a/deno.json
new file mode 100644
index 000000000..e6e03ae85
--- /dev/null
+++ b/tests/specs/check/workspace/package-a/deno.json
@@ -0,0 +1,5 @@
+{
+  "name": "@scope/a",
+  "version": "1.0.0",
+  "exports": "./mod.ts"
+}
diff --git a/tests/specs/check/workspace/package-a/mod.ts b/tests/specs/check/workspace/package-a/mod.ts
new file mode 100644
index 000000000..8d9b8a22a
--- /dev/null
+++ b/tests/specs/check/workspace/package-a/mod.ts
@@ -0,0 +1,3 @@
+export function add(a: number, b: number): number {
+  return a + b;
+}
diff --git a/tests/specs/check/workspace/package-b/deno.json b/tests/specs/check/workspace/package-b/deno.json
new file mode 100644
index 000000000..f131c191b
--- /dev/null
+++ b/tests/specs/check/workspace/package-b/deno.json
@@ -0,0 +1,5 @@
+{
+  "name": "@scope/b",
+  "version": "1.0.0",
+  "exports": "./mod.ts"
+}
diff --git a/tests/specs/check/workspace/package-b/mod.ts b/tests/specs/check/workspace/package-b/mod.ts
new file mode 100644
index 000000000..554ba5674
--- /dev/null
+++ b/tests/specs/check/workspace/package-b/mod.ts
@@ -0,0 +1,4 @@
+import { add } from "@scope/a";
+
+const test: string = add(1, 2);
+console.log(test);
diff --git a/tests/specs/check/workspace/package_a.out b/tests/specs/check/workspace/package_a.out
new file mode 100644
index 000000000..faecec870
--- /dev/null
+++ b/tests/specs/check/workspace/package_a.out
@@ -0,0 +1 @@
+Check file:///[WILDLINE]/package-a/mod.ts
diff --git a/tests/specs/check/workspace/package_b.out b/tests/specs/check/workspace/package_b.out
new file mode 100644
index 000000000..8db6c5476
--- /dev/null
+++ b/tests/specs/check/workspace/package_b.out
@@ -0,0 +1,5 @@
+Check file:///[WILDLINE]/package-b/mod.ts
+error: TS2322 [ERROR]: Type 'number' is not assignable to type 'string'.
+const test: string = add(1, 2);
+      ~~~~
+    at [WILDLINE]
diff --git a/tests/specs/check/workspace/root.out b/tests/specs/check/workspace/root.out
new file mode 100644
index 000000000..21ae7acd3
--- /dev/null
+++ b/tests/specs/check/workspace/root.out
@@ -0,0 +1,6 @@
+Check file:///[WILDLINE]/package-a/mod.ts
+Check file:///[WILDLINE]/package-b/mod.ts
+error: TS2322 [ERROR]: Type 'number' is not assignable to type 'string'.
+const test: string = add(1, 2);
+      ~~~~
+    at [WILDLINE]