Add type annotation to main in new project template

Fixes gleam-lang#4313

compiler-cli/src/new.rs

@@ -96,7 +96,7 @@ gleam add {project_name}@1
 ```gleam
 import {project_name}
 
-pub fn main() {{
+pub fn main() -> Nil {{
   // TODO: An example of the project in use
 }}
 ```
@@ -124,7 +124,7 @@ erl_crash.dump
             Self::SrcModule => Some(format!(
                 r#"import gleam/io
 
-pub fn main() {{
+pub fn main() -> Nil {{
   io.println("Hello from {project_name}!")
 }}
 "#,

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_default_template@README.md.snap

@@ -13,7 +13,7 @@ gleam add my_project@1
 ```gleam
 import my_project
 
-pub fn main() {
+pub fn main() -> Nil {
   // TODO: An example of the project in use
 }
 ```

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_default_template@src__my_project.gleam.snap

@@ -0,0 +1,9 @@
+---
+source: compiler-cli/src/new/tests.rs
+expression: "crate::fs::read(Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect(\"Non Utf8 Path\"),).unwrap()"
+---
+import gleam/io
+
+pub fn main() -> Nil {
+  io.println("Hello from my_project!")
+}

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_default_template@test__my_project_test.gleam.snap

@@ -0,0 +1,16 @@
+---
+source: compiler-cli/src/new/tests.rs
+expression: "crate::fs::read(Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect(\"Non Utf8 Path\"),).unwrap()"
+---
+import gleeunit
+import gleeunit/should
+
+pub fn main() {
+  gleeunit.main()
+}
+
+// gleeunit test functions end in `_test`
+pub fn hello_world_test() {
+  1
+  |> should.equal(1)
+}

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_javascript_template@README.md.snap

@@ -13,7 +13,7 @@ gleam add my_project@1
 ```gleam
 import my_project
 
-pub fn main() {
+pub fn main() -> Nil {
   // TODO: An example of the project in use
 }
 ```

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_javascript_template@src__my_project.gleam.snap

@@ -0,0 +1,9 @@
+---
+source: compiler-cli/src/new/tests.rs
+expression: "crate::fs::read(Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect(\"Non Utf8 Path\"),).unwrap()"
+---
+import gleam/io
+
+pub fn main() -> Nil {
+  io.println("Hello from my_project!")
+}

compiler-cli/src/new/snapshots/gleam_cli__new__tests__new_with_javascript_template@test__my_project_test.gleam.snap

@@ -0,0 +1,16 @@
+---
+source: compiler-cli/src/new/tests.rs
+expression: "crate::fs::read(Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect(\"Non Utf8 Path\"),).unwrap()"
+---
+import gleeunit
+import gleeunit/should
+
+pub fn main() {
+  gleeunit.main()
+}
+
+// gleeunit test functions end in `_test`
+pub fn hello_world_test() {
+  1
+  |> should.equal(1)
+}

compiler-cli/src/new/tests.rs

@@ -51,7 +51,18 @@ fn new_with_default_template() {
     .unwrap();
     creator.run().unwrap();
 
-    insta::glob!(path, "my_project/*.*", |file_path| {
+    insta::glob!(&path, "my_project/*.*", |file_path| {
+        if !file_path.is_dir() {
+            insta::assert_snapshot!(
+                crate::fs::read(
+                    Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect("Non Utf8 Path"),
+                )
+                .unwrap()
+            );
+        }
+    });
+
+    insta::glob!(&path, "my_project/**/*.gleam", |file_path| {
         if !file_path.is_dir() {
             insta::assert_snapshot!(
                 crate::fs::read(
@@ -81,7 +92,18 @@ fn new_with_javascript_template() {
     .unwrap();
     creator.run().unwrap();
 
-    insta::glob!(path, "my_project/*.*", |file_path| {
+    insta::glob!(&path, "my_project/*.*", |file_path| {
+        if !file_path.is_dir() {
+            insta::assert_snapshot!(
+                crate::fs::read(
+                    Utf8PathBuf::from_path_buf(file_path.to_path_buf()).expect("Non Utf8 Path"),
+                )
+                .unwrap()
+            );
+        }
+    });
+
+    insta::glob!(&path, "my_project/**/*.gleam", |file_path| {
         if !file_path.is_dir() {
             insta::assert_snapshot!(
                 crate::fs::read(