Add plaintext.proto

Update Makefile to handle the import in `plaintext.proto`.
Import path is modified to be relative to the project root.
And we run `protoc` from where `Makefile` locates, i.e. the project
root.

Reference:
- plaintext.proto: 62b2c6c482/sec/insecure/pb/plaintext.proto

Makefile

@@ -1,4 +1,10 @@
 FILES_TO_LINT = libp2p tests examples setup.py
+PB = libp2p/crypto/pb/crypto.proto libp2p/pubsub/pb/rpc.proto libp2p/security/insecure/pb/plaintext.proto
+PY = $(PB:.proto=_pb2.py)
+PYI = $(PB:.proto=_pb2.pyi)
+
+# Set default to `protobufs`, otherwise `format` is called when typing only `make`
+all: protobufs
 
 format:
 	black $(FILES_TO_LINT)
@@ -10,6 +16,12 @@ lintroll:
 	isort --recursive --check-only $(FILES_TO_LINT)
 	flake8 $(FILES_TO_LINT)
 
-protobufs:
-	cd libp2p/crypto/pb && protoc --python_out=. --mypy_out=. crypto.proto
-	cd libp2p/pubsub/pb && protoc --python_out=. --mypy_out=. rpc.proto
+protobufs: $(PY)
+
+%_pb2.py: %.proto
+	protoc --python_out=. --mypy_out=. $<
+
+.PHONY: clean
+
+clean:
+	rm -f $(PY) $(PYI)

libp2p/security/insecure/pb/plaintext.proto

@@ -0,0 +1,10 @@
+syntax = "proto2";
+
+package plaintext.pb;
+
+import "libp2p/crypto/pb/crypto.proto";
+
+message Exchange {
+    optional bytes id = 1;
+    optional crypto.pb.PublicKey pubkey = 2;
+}

libp2p/security/insecure/pb/plaintext_pb2.py

@@ -0,0 +1,79 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: libp2p/security/insecure/pb/plaintext.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+from libp2p.crypto.pb import crypto_pb2 as libp2p_dot_crypto_dot_pb_dot_crypto__pb2
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='libp2p/security/insecure/pb/plaintext.proto',
+  package='plaintext.pb',
+  syntax='proto2',
+  serialized_pb=_b('\n+libp2p/security/insecure/pb/plaintext.proto\x12\x0cplaintext.pb\x1a\x1dlibp2p/crypto/pb/crypto.proto\"<\n\x08\x45xchange\x12\n\n\x02id\x18\x01 \x01(\x0c\x12$\n\x06pubkey\x18\x02 \x01(\x0b\x32\x14.crypto.pb.PublicKey')
+  ,
+  dependencies=[libp2p_dot_crypto_dot_pb_dot_crypto__pb2.DESCRIPTOR,])
+
+
+
+
+_EXCHANGE = _descriptor.Descriptor(
+  name='Exchange',
+  full_name='plaintext.pb.Exchange',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='id', full_name='plaintext.pb.Exchange.id', index=0,
+      number=1, type=12, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b(""),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None, file=DESCRIPTOR),
+    _descriptor.FieldDescriptor(
+      name='pubkey', full_name='plaintext.pb.Exchange.pubkey', index=1,
+      number=2, type=11, cpp_type=10, label=1,
+      has_default_value=False, default_value=None,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None, file=DESCRIPTOR),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto2',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=92,
+  serialized_end=152,
+)
+
+_EXCHANGE.fields_by_name['pubkey'].message_type = libp2p_dot_crypto_dot_pb_dot_crypto__pb2._PUBLICKEY
+DESCRIPTOR.message_types_by_name['Exchange'] = _EXCHANGE
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+Exchange = _reflection.GeneratedProtocolMessageType('Exchange', (_message.Message,), dict(
+  DESCRIPTOR = _EXCHANGE,
+  __module__ = 'libp2p.security.insecure.pb.plaintext_pb2'
+  # @@protoc_insertion_point(class_scope:plaintext.pb.Exchange)
+  ))
+_sym_db.RegisterMessage(Exchange)
+
+
+# @@protoc_insertion_point(module_scope)

libp2p/security/insecure/pb/plaintext_pb2.pyi

@@ -0,0 +1,45 @@
+# @generated by generate_proto_mypy_stubs.py.  Do not edit!
+import sys
+from google.protobuf.descriptor import (
+    Descriptor as google___protobuf___descriptor___Descriptor,
+)
+
+from google.protobuf.message import (
+    Message as google___protobuf___message___Message,
+)
+
+from libp2p.crypto.pb.crypto_pb2 import (
+    PublicKey as libp2p___crypto___pb___crypto_pb2___PublicKey,
+)
+
+from typing import (
+    Optional as typing___Optional,
+)
+
+from typing_extensions import (
+    Literal as typing_extensions___Literal,
+)
+
+
+class Exchange(google___protobuf___message___Message):
+    DESCRIPTOR: google___protobuf___descriptor___Descriptor = ...
+    id = ... # type: bytes
+
+    @property
+    def pubkey(self) -> libp2p___crypto___pb___crypto_pb2___PublicKey: ...
+
+    def __init__(self,
+        *,
+        id : typing___Optional[bytes] = None,
+        pubkey : typing___Optional[libp2p___crypto___pb___crypto_pb2___PublicKey] = None,
+        ) -> None: ...
+    @classmethod
+    def FromString(cls, s: bytes) -> Exchange: ...
+    def MergeFrom(self, other_msg: google___protobuf___message___Message) -> None: ...
+    def CopyFrom(self, other_msg: google___protobuf___message___Message) -> None: ...
+    if sys.version_info >= (3,):
+        def HasField(self, field_name: typing_extensions___Literal[u"id",u"pubkey"]) -> bool: ...
+        def ClearField(self, field_name: typing_extensions___Literal[u"id",u"pubkey"]) -> None: ...
+    else:
+        def HasField(self, field_name: typing_extensions___Literal[u"id",b"id",u"pubkey",b"pubkey"]) -> bool: ...
+        def ClearField(self, field_name: typing_extensions___Literal[u"id",b"id",u"pubkey",b"pubkey"]) -> None: ...