Merge #50

50: gen-prost-serde: add missing pbjson-build options r=neoeinstein a=torkelrogstad

Fixes #49

Literally my first time writing Rust code, so might be something obvious I've missed. Happy to fix any issues, if you point me in the right direction!

Co-authored-by: Torkel Rogstad <torkel@rogstad.io>

protoc-gen-prost-serde/README.md

@@ -37,6 +37,9 @@ from that crate:
 * `extern_path=<proto_path>=<rust_path>`:  [extern_path](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.extern_path)
 * `retain_enum_prefix(=<boolean>)`:  [retain_enum_prefix](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.retain_enum_prefix)
 * `preserve_proto_field_names=(<boolean>)`: `[preserve_proto_field_names](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.preserve_proto_field_names)
+* `ignore_unknown_fields=(<boolean>)`: `[ignore_unknown_fields](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.ignore_unknown_fields)
+* `emit_fields=(<boolean>)`: `[emit_fields](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.emit_fields)
+* `use_integers_for_enums=(<boolean>)`: `[use_integers_for_enums](https://docs.rs/pbjson-build/latest/pbjson_build/struct.Builder.html#method.use_integers_for_enums)
 
 In addition, the following options can also be specified:
 

protoc-gen-prost-serde/src/lib.rs

@@ -41,6 +41,9 @@ struct Parameters {
     extern_path: Vec<(String, String)>,
     retain_enum_prefix: bool,
     preserve_proto_field_names: bool,
+    ignore_unknown_fields: bool,
+    emit_fields: bool,
+    use_integers_for_enums: bool,
     no_include: bool,
 }
 
@@ -60,6 +63,18 @@ impl Parameters {
             builder.preserve_proto_field_names();
         }
 
+        if self.ignore_unknown_fields {
+            builder.ignore_unknown_fields();
+        }
+
+        if self.emit_fields {
+            builder.emit_fields();
+        }
+
+        if self.use_integers_for_enums {
+            builder.use_integers_for_enums();
+        }
+
         builder
     }
 }
@@ -99,6 +114,27 @@ impl str::FromStr for Parameters {
                     param: "preserve_proto_field_names",
                     value: "false",
                 } => (),
+                Param::Parameter {
+                    param: "ignore_unknown_fields",
+                }
+                | Param::Value {
+                    param: "ignore_unknown_fields",
+                    value: "true",
+                } => ret_val.ignore_unknown_fields = true,
+                Param::Parameter {
+                    param: "emit_fields",
+                }
+                | Param::Value {
+                    param: "emit_fields",
+                    value: "true",
+                } => ret_val.emit_fields = true,
+                Param::Parameter {
+                    param: "use_integers_for_enums",
+                }
+                | Param::Value {
+                    param: "use_integers_for_enums",
+                    value: "true",
+                } => ret_val.use_integers_for_enums = true,
                 Param::Parameter {
                     param: "no_include",
                 }