Fix some issues with pb-jelly-gen and newer python/protoc (#155)

Author: goffrie

pb-jelly-gen/codegen/pyproject.toml

@@ -1,6 +1,13 @@
 [project]
 name = "pb-jelly"
 version = "0.0.14"
+description = "Generate rust bindings from protobuf specs"
+keywords = ["rust", "proto", "dropbox"]
+license = { text = "Apache License 2.0" }
+dependencies = ["protobuf>=3.13.0"]
+
+[project.scripts]
+protoc-gen-rust = "codegen:main"
 
 [build-system]
 requires = [

pb-jelly-gen/codegen/setup.cfg

@@ -6,8 +6,10 @@ keywords = rust proto dropbox
 license = Apache License 2.0
 url = https://github.com/dropbox/pb-jelly
 
+[options]
+install_requires =
+    protobuf>=3.13.0
+
 [options.entry_points]
 console_scripts =
     protoc-gen-rust = codegen:main
-install_requires =
-    protobuf>=3.13.0

pb-jelly-gen/src/lib.rs

@@ -38,6 +38,7 @@ use include_dir::{
 use std::os::unix::fs::PermissionsExt;
 use std::{
     convert::AsRef,
+    ffi::OsStr,
     fs,
     io::Write,
     iter::IntoIterator,
@@ -228,17 +229,17 @@ impl GenProtos {
     }
 
     fn gen_rust_protos(&self, temp_dir: tempfile::TempDir) -> Output {
+        let venv_bin = self.create_venv(&temp_dir);
         let new_path = {
-            let venv_bin = self.create_venv(&temp_dir);
             let mut path: Vec<_> = std::env::split_paths(&std::env::var_os("PATH").unwrap()).collect();
-            path.insert(0, venv_bin);
+            path.insert(0, venv_bin.clone());
             std::env::join_paths(path).unwrap()
         };
         dbg!(&new_path);
 
         // Create protoc cmd in the venv
         let mut protoc_cmd = Command::new("protoc");
-        protoc_cmd.env("PATH", new_path);
+        protoc_cmd.env("PATH", &new_path);
         protoc_cmd.env("PYTHONPATH", temp_dir.path());
 
         // Directories that contain protos
@@ -264,8 +265,24 @@ impl GenProtos {
             dbg!(path);
         }
 
+        protoc_cmd.arg(
+            [
+                OsStr::new("--plugin=protoc-gen-rust_pb_jelly="),
+                venv_bin
+                    .join(if cfg!(windows) {
+                        "protoc-gen-rust.exe"
+                    } else {
+                        "protoc-gen-rust"
+                    })
+                    .as_os_str(),
+            ]
+            .join(OsStr::new("")),
+        );
+
         // Set the Rust out path
-        protoc_cmd.arg("--rust_out");
+        // (Don't use "rust" as the name of the plugin because protoc now has (broken) upstream Rust support that
+        // overrides the plugin)
+        protoc_cmd.arg("--rust_pb_jelly_out");
         protoc_cmd.arg(&self.gen_path);
 
         // Get paths of our Protos