FUTURE: `deno install` changes (#23498)

This PR implements the changes we plan to make to `deno install` in deno
2.0.
- `deno install` without arguments caches dependencies from
`package.json` / `deno.json` and sets up the `node_modules` folder
- `deno install <pkg>` adds the package to the config file (either
`package.json` or `deno.json`), i.e. it aliases `deno add`
- `deno add` can also add deps to `package.json` (this is gated behind
`DENO_FUTURE` due to uncertainty around handling projects with both
`deno.json` and `package.json`)
- `deno install -g <bin>` installs a package as a globally available
binary (the same as `deno install <bin>` in 1.0)

---------

Co-authored-by: Nathan Whitaker <nathan@deno.com>

5 files changed, 38 insertions, 0 deletions

diff --git a/tests/specs/install/no_future_install_global/__test__.jsonc b/tests/specs/install/no_future_install_global/__test__.jsonc
new file mode 100644
index 000000000..ca351ee0d
--- /dev/null
+++ b/tests/specs/install/no_future_install_global/__test__.jsonc
@@ -0,0 +1,13 @@
+{
+  "tempDir": true,
+  "steps": [
+    {
+      "args": "install --root ./bins --name deno-test-bin ./main.js",
+      "output": "install.out"
+    },
+    {
+      "args": "run -A ./assert.js",
+      "output": ""
+    }
+  ]
+}
diff --git a/tests/specs/install/no_future_install_global/assert.js b/tests/specs/install/no_future_install_global/assert.js
new file mode 100644
index 000000000..c7a6a0680
--- /dev/null
+++ b/tests/specs/install/no_future_install_global/assert.js
@@ -0,0 +1,11 @@
+const dirs = Deno.readDir("./bins/bin");
+
+let found = false;
+for await (const entry of dirs) {
+  if (entry.name.includes("deno-test-bin")) {
+    found = true;
+  }
+}
+if (!found) {
+  throw new Error("Failed to find test bin");
+}
diff --git a/tests/specs/install/no_future_install_global/install.out b/tests/specs/install/no_future_install_global/install.out
new file mode 100644
index 000000000..f3a394c6f
--- /dev/null
+++ b/tests/specs/install/no_future_install_global/install.out
@@ -0,0 +1,5 @@
+⚠️ `deno install` behavior will change in Deno 2. To preserve the current behavior use the `-g` or `--global` flag.
+Download http://localhost:4260/@denotest/esm-basic
+Download http://localhost:4260/@denotest/esm-basic/1.0.0.tgz
+✅ Successfully installed deno-test-bin[WILDCARD]
+[WILDCARD]
diff --git a/tests/specs/install/no_future_install_global/main.js b/tests/specs/install/no_future_install_global/main.js
new file mode 100644
index 000000000..6268d7136
--- /dev/null
+++ b/tests/specs/install/no_future_install_global/main.js
@@ -0,0 +1,3 @@
+import { setValue } from "npm:@denotest/esm-basic";
+
+setValue(5);
diff --git a/tests/specs/install/no_future_install_global/package.json b/tests/specs/install/no_future_install_global/package.json
new file mode 100644
index 000000000..9f465ad50
--- /dev/null
+++ b/tests/specs/install/no_future_install_global/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "deno-test-bin",
+  "dependencies": {
+    "@denotest/esm-basic": "*"
+  }
+}