with enum

crates/dagger-codegen/Cargo.toml

@@ -6,6 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+dagger-core = { path = "../dagger-core" }
+
 eyre = "0.6.8"
 genco = "0.17.3"
 graphql-introspection-query = "0.2.0"

crates/dagger-codegen/rust-toolchain

@@ -0,0 +1 @@
+nightly

crates/dagger-codegen/src/codegen.rs

@@ -1,12 +1,15 @@
-use std::sync::Arc;
+use std::{
+    io::{BufWriter, Write},
+    sync::Arc,
+};
 
-use genco::{prelude::rust, quote};
+use genco::{fmt, prelude::rust, prelude::*, quote};
 use graphql_introspection_query::introspection_response::{
     FullType, IntrospectionResponse, Schema,
 };
 
 use crate::{
-    handlers::{scalar::Scalar, DynHandler, Handlers},
+    handlers::{enumeration::Enumeration, scalar::Scalar, DynHandler, Handlers},
     predicates::is_custom_scalar_type,
 };
 
@@ -18,7 +21,7 @@ pub struct CodeGeneration {
 impl CodeGeneration {
     pub fn new() -> Self {
         Self {
-            handlers: vec![Arc::new(Scalar {})],
+            handlers: vec![Arc::new(Scalar {}), Arc::new(Enumeration {})],
         }
     }
 
@@ -35,6 +38,7 @@ impl CodeGeneration {
 
     fn generate_from_schema(&self, schema: &Schema) -> eyre::Result<String> {
         let mut output = rust::Tokens::new();
+        output.push();
         output.append(quote! {
             $(format!("// code generated by dagger. DO NOT EDIT."))
         });
@@ -52,7 +56,17 @@ impl CodeGeneration {
             }
         }
 
-        Ok(output.to_string()?)
+        let mut buffer = BufWriter::new(Vec::new());
+        let mut w = fmt::IoWriter::new(buffer.by_ref());
+        let fmt = fmt::Config::from_lang::<Rust>().with_indentation(fmt::Indentation::Space(4));
+        let config = rust::Config::default();
+        // Prettier imports and use.
+        //.with_default_import(rust::ImportMode::Qualified);
+
+        output.format_file(&mut w.as_formatter(&fmt), &config)?;
+
+        let out = String::from_utf8(buffer.into_inner()?)?;
+        Ok(out)
     }
 
     pub fn group_by_handlers(&self, types: &Vec<&FullType>) -> Vec<(DynHandler, Vec<FullType>)> {

crates/dagger-codegen/src/handlers/enumeration.rs

@@ -0,0 +1,31 @@
+use genco::{prelude::rust, quote};
+use graphql_introspection_query::introspection_response::FullType;
+
+use crate::predicates::is_enum_type;
+
+use super::{utility::render_description, Handler};
+
+pub struct Enumeration;
+
+impl Handler for Enumeration {
+    fn predicate(&self, t: &FullType) -> bool {
+        is_enum_type(t)
+    }
+
+    fn render(&self, t: &FullType) -> eyre::Result<rust::Tokens> {
+        let name = t
+            .name
+            .as_ref()
+            .ok_or(eyre::anyhow!("could not get name from type"))?;
+
+        let description =
+            render_description(t).ok_or(eyre::anyhow!("could not find description"))?;
+
+        let out = quote! {
+            $description
+            pub enum $name {}
+        };
+
+        Ok(out)
+    }
+}

crates/dagger-codegen/src/handlers/mod.rs

@@ -1,3 +1,4 @@
+pub mod enumeration;
 pub mod scalar;
 mod utility;
 

crates/dagger-codegen/src/handlers/scalar.rs

@@ -29,8 +29,10 @@ impl Handler for Scalar {
     fn render_struct(&self, t: &FullType) -> eyre::Result<genco::prelude::rust::Tokens> {
         let name = t.name.as_ref().ok_or(eyre::anyhow!("name not found"))?;
 
+        let scalar = rust::import("dagger_core", "Scalar");
+
         Ok(quote! {
-            pub struct $name(Scalar);
+            pub struct $name($scalar);
         })
     }
 

crates/dagger-codegen/src/predicates.rs

@@ -9,6 +9,13 @@ pub fn is_scalar_type(t: &FullType) -> bool {
     false
 }
 
+pub fn is_enum_type(t: &FullType) -> bool {
+    if let Some(introspection_response::__TypeKind::ENUM) = t.kind {
+        return true;
+    }
+    false
+}
+
 pub fn is_custom_scalar_type(t: &FullType) -> bool {
     if is_scalar_type(t) {
         // TODO: Insert scalar