Spawn cargo add in the new command

src/commands/new.rs

@@ -14,11 +14,10 @@ use std::{
     path::{Path, PathBuf},
     process::Command,
 };
-use toml_edit::{table, value, Array, Document, InlineTable, Item, Table, Value};
+use toml_edit::{table, value, Document, Item, Table, Value};
 use url::Url;
 
 const WIT_BINDGEN_CRATE: &str = "wit-bindgen";
-const WIT_BINDGEN_VERSION: &str = "0.16.0";
 
 fn escape_wit(s: &str) -> Cow<str> {
     match s {
@@ -282,13 +281,7 @@ impl NewCommand {
         metadata.set_implicit(true);
         metadata.set_position(doc.len());
         metadata["component"] = Item::Table(component);
-
         doc["package"]["metadata"] = Item::Table(metadata);
-        doc["dependencies"][WIT_BINDGEN_CRATE] = value(InlineTable::from_iter([
-            ("version", Value::from(WIT_BINDGEN_VERSION)),
-            ("default-features", Value::from(false)),
-            ("features", Value::from(Array::from_iter(["realloc"]))),
-        ]));
 
         fs::write(&manifest_path, doc.to_string()).with_context(|| {
             format!(
@@ -297,6 +290,22 @@ impl NewCommand {
             )
         })?;
 
+        // Run cargo add for wit-bindgen
+        let mut cargo_add_command = std::process::Command::new("cargo");
+        cargo_add_command.arg("add");
+        cargo_add_command.arg("--quiet");
+        cargo_add_command.arg("--no-default-features");
+        cargo_add_command.arg("--features");
+        cargo_add_command.arg("realloc");
+        cargo_add_command.arg(WIT_BINDGEN_CRATE);
+        cargo_add_command.current_dir(out_dir);
+        let status = cargo_add_command
+            .status()
+            .context("failed to execute `cargo add` command")?;
+        if !status.success() {
+            bail!("`cargo add` command exited with non-zero status");
+        }
+
         config.terminal().status(
             "Updated",
             format!("manifest of package `{name}`", name = name.display),

tests/build.rs

@@ -50,13 +50,6 @@ fn it_builds_a_workspace() -> Result<()> {
         root: dir.path().to_owned(),
     };
 
-    project.file(
-        "Cargo.toml",
-        r#"[workspace]
-members = ["foo", "bar", "baz"]
-"#,
-    )?;
-
     project.file(
         "baz/Cargo.toml",
         r#"[package]
@@ -82,6 +75,14 @@ edition = "2021"
         .stderr(contains("Updated manifest of package `bar`"))
         .success();
 
+    // Add the workspace after all of the projects have been created
+    project.file(
+        "Cargo.toml",
+        r#"[workspace]
+    members = ["foo", "bar", "baz"]
+    "#,
+    )?;
+
     project
         .cargo_component("build")
         .assert()

tests/check.rs

@@ -46,13 +46,6 @@ fn it_checks_a_workspace() -> Result<()> {
         root: dir.path().to_owned(),
     };
 
-    project.file(
-        "Cargo.toml",
-        r#"[workspace]
-members = ["foo", "bar", "baz"]
-"#,
-    )?;
-
     project.file(
         "baz/Cargo.toml",
         r#"[package]
@@ -78,6 +71,14 @@ edition = "2021"
         .stderr(contains("Updated manifest of package `bar`"))
         .success();
 
+    // Add the workspace after all of the packages have been created.
+    project.file(
+        "Cargo.toml",
+        r#"[workspace]
+    members = ["foo", "bar", "baz"]
+    "#,
+    )?;
+
     project
         .cargo_component("check")
         .assert()

tests/clippy.rs

@@ -67,13 +67,6 @@ fn it_checks_a_workspace() -> Result<()> {
         root: dir.path().to_owned(),
     };
 
-    project.file(
-        "Cargo.toml",
-        r#"[workspace]
-members = ["foo", "bar", "baz"]
-"#,
-    )?;
-
     project.file(
         "baz/Cargo.toml",
         r#"[package]
@@ -99,6 +92,14 @@ edition = "2021"
         .stderr(contains("Updated manifest of package `bar`"))
         .success();
 
+    // Add the workspace after all of the packages have been created.
+    project.file(
+        "Cargo.toml",
+        r#"[workspace]
+members = ["foo", "bar", "baz"]
+"#,
+    )?;
+
     project
         .cargo_component("clippy")
         .assert()

tests/metadata.rs

@@ -44,13 +44,6 @@ fn it_prints_workspace_metadata() -> Result<()> {
         root: dir.path().to_owned(),
     };
 
-    project.file(
-        "Cargo.toml",
-        r#"[workspace]
-members = ["foo", "bar", "baz"]
-"#,
-    )?;
-
     project.file(
         "baz/Cargo.toml",
         r#"[package]
@@ -76,6 +69,14 @@ edition = "2021"
         .stderr(contains("Updated manifest of package `bar`"))
         .success();
 
+    // Add the workspace after all of the packages have been created.
+    project.file(
+        "Cargo.toml",
+        r#"[workspace]
+members = ["foo", "bar", "baz"]
+"#,
+    )?;
+
     project
         .cargo_component("metadata --format-version 1")
         .assert()