From 4c1aed55cf888feee187e25347c1aad119b439cd Mon Sep 17 00:00:00 2001
From: Istvan Fodor <info@istvanfodor.com>
Date: Tue, 1 Oct 2024 07:02:59 -0500
Subject: [PATCH] fox: fixed cargo doc build

---
 Cargo.toml        | 18 +++++++++++++-----
 build.rs          | 15 ++++++++++-----
 src/ros_mapper.rs |  2 ++
 src/schema.rs     |  4 ++++
 4 files changed, 29 insertions(+), 10 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index ce65489..bc6c685 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "r2a"
-version = "0.1.2"
+version = "0.1.3"
 edition = "2021"
 description = "A Rust library that provides a typesafe way to convert ROS2 messages into Apache Arrow format"
 homepage = "https://github.com/istvan-fodor/r2a"
@@ -9,14 +9,18 @@ license = "Apache-2.0"
 readme = "README.md"
 keywords = ["ROS", "ROS2", "Humble", "Jazzy", "Arrow"]
 
+[features]
+doc-only = []
+default = ["r2r", "r2r_common"]
+
+
 [dependencies]
 arrow-schema = ">=50"
 arrow-array = ">=50"
-r2r = ">=0.9.0"
+r2r = { version = ">=0.9.0", optional = true }
 anyhow = ">=1"
 log = ">=0.4"
 
-
 [dev-dependencies]
 futures = "0.3"
 tokio = { version = "1.40.0", features = ["rt-multi-thread", "full"] }
@@ -25,11 +29,15 @@ rand = "0.8"
 
 [build-dependencies]
 walkdir = "2"
-r2r = ">=0.9.0"
-r2r_common = ">=0.9.0"
+r2r = { version = ">=0.9.0", optional = true }
+r2r_common = { version = ">=0.9.0", optional = true }
 anyhow = "1"
 proc-macro2 = "1.0.78"
 quote = "1.0.35"
 syn = { version = "2", features = ["full", "visit"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+
+[package.metadata.docs.rs]
+no-default-features = true
+features = ["doc-only"]
diff --git a/build.rs b/build.rs
index bb023d0..057c222 100644
--- a/build.rs
+++ b/build.rs
@@ -1,6 +1,6 @@
 use proc_macro2::TokenStream;
 use quote::quote;
-use r2r_common::get_env_hash;
+
 
 use anyhow::Result;
 use std::collections::BTreeMap;
@@ -273,7 +273,6 @@ fn generate_imports() -> TokenStream {
 fn generate_arrow_imports() -> TokenStream {
     quote! {
         use arrow_schema::{DataType, Field, Fields, Schema};
-        use std::sync::Arc;
         use r2r::{WrappedTypesupport};
     }
 }
@@ -1546,8 +1545,15 @@ fn generate_arrow_rowbuilders(
     gen_function
 }
 
+#[cfg(feature = "doc-only")]
+fn main() -> Result<()> {
+    Ok(())
+}
+
+#[cfg(not(feature = "doc-only"))]
 fn main() -> Result<()> {
     // Parse the source code as a syn file
+    use r2r_common::get_env_hash;
     let out_dir = env::var("OUT_DIR").unwrap();
     let out_dir_path = Path::new(&out_dir);
 
@@ -1572,16 +1578,15 @@ fn main() -> Result<()> {
     let (structs_by_schema, structs_by_type) =
         find_structs_by_schema_and_type(deps_dir, env_hash.as_str(), &implementing_structs);
 
-    //let map_function = generate_map_function(&structs_by_schema);
+    //let map_function = generate_map_function(&structs_by_schema);s
     generate_schema(
         out_dir_path,
         &structs_by_schema,
-       // &structs_by_type,
+    // &structs_by_type,
         &mut log_file,
     )?;
 
     generate_arrow_mappers(out_dir, structs_by_schema, structs_by_type, &mut log_file)?;
-
     Ok(())
 }
 
diff --git a/src/ros_mapper.rs b/src/ros_mapper.rs
index e2664dd..7f2c78f 100644
--- a/src/ros_mapper.rs
+++ b/src/ros_mapper.rs
@@ -1,6 +1,7 @@
 use anyhow::Result;
 use arrow_array::builder::ArrayBuilder;
 use arrow_array::Array;
+use std::sync::Arc;
 
 /// The `RowBuilder` trait is implemented for each ROS2 message type by a code generator.
 /// It serves as an accumulator that collects records and converts them into a collection
@@ -152,6 +153,7 @@ pub trait ArrowSupport<'a> {
     fn arrow_schema() -> arrow_schema::Schema;
 }
 
+#[cfg(feature = "default")]
 include!(concat!(env!("OUT_DIR"), "/generated_arrow_mappers.rs"));
 
 #[cfg(test)]
diff --git a/src/schema.rs b/src/schema.rs
index 3095cc3..51f0abb 100644
--- a/src/schema.rs
+++ b/src/schema.rs
@@ -1 +1,5 @@
+#[cfg(feature = "default")]
 include!(concat!(env!("OUT_DIR"), "/generated_schema.rs"));
+
+#[cfg(feature = "doc-only")]
+pub static SUPPORTED_SCHEMAS: &'static [&'static str] = &[];