Fallback to modifying src with build script to fix publishing

Because of a bug(?) in cargo preventing subcommands like publish from
reading env variables set by the build script there isn't an effective way
currently to communicate the location of generated source files to pass to
include!()

This is potentially related to rust-lang/cargo#10094

.gitignore

@@ -1,2 +1,5 @@
 /target
 **/*.rs.bk
+out/*.rs
+src/gen_types.rs
+src/gen_methods.rs

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "botapi"
-version = "0.0.30"
+version = "0.0.34"
 edition = "2021"
 authors = [ "Alex Ballmer <gnu3ra@riseup.net" ]
 description = "A mildly competent autogenerated telegram bot api wrapper"
@@ -31,5 +31,5 @@ tokio-test = "0.4.3"
 ordered-float = { version = "4.1.1", features = ["serde"] }
 
 [build-dependencies]
-tggen = { path = "./generate", version = "0.0.30" }
+tggen = { path = "./generate", version = "0.0.34" }
 anyhow = "1.0.75"

build.rs

@@ -15,8 +15,10 @@ fn main() -> Result<()> {
     let gen = Generate::new(json)?;
     let types = gen.generate_types()?;
     let methods = gen.generate_methods()?;
-    let methods_path = std::env::var("OUT_DIR").unwrap() + "/gen_methods.rs";
-    let types_path = std::env::var("OUT_DIR").unwrap() + "/gen_types.rs";
+    let out_dir = "./src";
+    let methods_path = out_dir.to_owned() + "/gen_methods.rs";
+    let types_path = out_dir.to_owned() + "/gen_types.rs";
+    println!("cargo:rustc-env=BOT_GEN_DIR={}", out_dir);
     fs::write(&types_path, types)?;
 
     fs::write(&methods_path, methods)?;

generate/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tggen"
-version = "0.0.30"
+version = "0.0.34"
 edition = "2021"
 authors = [ "Alex Ballmer <gnu3ra@riseup.net" ]
 description = "A mildly competent autogenerated telegram bot api wrapper (helper crate)"

src/lib.rs

@@ -64,10 +64,10 @@ pub mod ext;
 #[allow(unused_imports, rustdoc::bare_urls)]
 /// Autogenerated REST api methods
 pub mod gen_methods {
-    include!(concat!(env!("OUT_DIR"), "/gen_methods.rs"));
+    include!("gen_methods.rs");
 }
 ///Autogenerated REST api types from json
 #[allow(rustdoc::bare_urls)]
 pub mod gen_types {
-    include!(concat!(env!("OUT_DIR"), "/gen_types.rs"));
+    include!("gen_types.rs");
 }