1 files changed, 53 insertions, 0 deletions
diff --git a/2.27.1/src/compiler_plugin.rs b/2.27.1/src/compiler_plugin.rs
new file mode 100644
index 0000000..122eeb3
--- /dev/null
+++ b/2.27.1/src/compiler_plugin.rs
@@ -0,0 +1,53 @@
+// TODO: move into separate crate
+#![doc(hidden)]
+
+use std::io::stdin;
+use std::io::stdout;
+use std::str;
+
+use crate::descriptor::FileDescriptorProto;
+use crate::plugin::*;
+use crate::Message;
+
+pub struct GenRequest<'a> {
+    pub file_descriptors: &'a [FileDescriptorProto],
+    pub files_to_generate: &'a [String],
+    pub parameter: &'a str,
+}
+
+pub struct GenResult {
+    pub name: String,
+    pub content: Vec<u8>,
+}
+
+pub fn plugin_main<F>(gen: F)
+where
+    F: Fn(&[FileDescriptorProto], &[String]) -> Vec<GenResult>,
+{
+    plugin_main_2(|r| gen(r.file_descriptors, r.files_to_generate))
+}
+
+pub fn plugin_main_2<F>(gen: F)
+where
+    F: Fn(&GenRequest) -> Vec<GenResult>,
+{
+    let req = CodeGeneratorRequest::parse_from_reader(&mut stdin()).unwrap();
+    let result = gen(&GenRequest {
+        file_descriptors: &req.get_proto_file(),
+        files_to_generate: &req.get_file_to_generate(),
+        parameter: req.get_parameter(),
+    });
+    let mut resp = CodeGeneratorResponse::new();
+    resp.set_file(
+        result
+            .iter()
+            .map(|file| {
+                let mut r = CodeGeneratorResponse_File::new();
+                r.set_name(file.name.to_string());
+                r.set_content(str::from_utf8(file.content.as_ref()).unwrap().to_string());
+                r
+            })
+            .collect(),
+    );
+    resp.write_to_writer(&mut stdout()).unwrap();
+}