nanopb: add tests via passthru.tests

pkgs/development/libraries/nanopb/default.nix

···
     chmod +x $out/bin/protoc-gen-nanopb
   '';
 
+  passthru.tests = {
+    simple-proto2 = callPackage ./test-simple-proto2 {};
+    simple-proto3 = callPackage ./test-simple-proto3 {};
+    message-with-annotations = callPackage ./test-message-with-annotations {};
+    message-with-options = callPackage ./test-message-with-options {};
+  };
+
   meta = with lib; {
     inherit (protobuf.meta) platforms;
 

pkgs/development/libraries/nanopb/test-message-with-annotations/default.nix

···
+{ stdenv, protobuf, nanopb }:
+
+stdenv.mkDerivation {
+  name = "nanopb-test-message-with-annotations";
+  meta.timeout = 60;
+  src = ./.;
+
+  # protoc requires any .proto file to be compiled to reside within it's
+  # proto_path. By default the current directory is automatically added to the
+  # proto_path. I tried using --proto_path ${./.} ${./simple.proto} and it did
+  # not work because they end up in the store at different locations.
+  installPhase = ":";
+  buildPhase = ''
+    mkdir $out
+
+    ${protobuf}/bin/protoc --proto_path=. --proto_path=${nanopb}/share/nanopb/generator/proto --plugin=protoc-gen-nanopb=${nanopb}/bin/protoc-gen-nanopb --nanopb_out=$out withannotations.proto
+  '';
+
+  docheck = true;
+  checkphase = ''
+    grep -q WithAnnotations $out/withannotations.pb.c || (echo "error: WithAnnotations not found in $out/withannotations.pb.c"; exit 1)
+    grep -q WithAnnotations $out/withannotations.pb.h || (echo "error: WithAnnotations not found in $out/withannotations.pb.h"; exit 1)
+    grep -q "pb_byte_t uuid\[16\]" $out/withannotations.pb.h || (echo "error: uuid is not of type pb_byte_t and of size 16 in $out/withannotations.pb.h"; exit 1)
+    grep -q "FIXED_LENGTH_BYTES, uuid" $out/withannotations.pb.h || (echo "error: uuid is not of fixed lenght bytes in $out/withannotations.pb.h"; exit 1)
+    grep -q "#define WithAnnotations_size" $out/withannotations.pb.h || (echo "error: the size of WithAnnotations is not known in $out/withannotations.pb.h"; exit 1)
+  '';
+}

pkgs/development/libraries/nanopb/test-message-with-annotations/withannotations.proto

···
+syntax = "proto3";
+
+import "nanopb.proto";
+
+message WithAnnotations {
+  bytes uuid = 1 [(nanopb).max_size = 16, (nanopb).fixed_length = true];
+}

pkgs/development/libraries/nanopb/test-message-with-options/default.nix

···
+{ stdenv, protobuf, nanopb }:
+
+stdenv.mkDerivation {
+  name = "nanopb-test-message-with-options";
+  meta.timeout = 60;
+  src = ./.;
+
+  # protoc requires any .proto file to be compiled to reside within it's
+  # proto_path. By default the current directory is automatically added to the
+  # proto_path. I tried using --proto_path ${./.} ${./simple.proto} and it did
+  # not work because they end up in the store at different locations.
+  installPhase = ":";
+  buildPhase = ''
+    mkdir $out
+
+    ${protobuf}/bin/protoc --plugin=protoc-gen-nanopb=${nanopb}/bin/protoc-gen-nanopb --nanopb_out=$out withoptions.proto
+  '';
+
+  docheck = true;
+  checkphase = ''
+    grep -q WithOptions $out/withoptions.pb.c || (echo "error: WithOptions not found in $out/withoptions.pb.c"; exit 1)
+    grep -q WithOptions $out/withoptions.pb.h || (echo "error: WithOptions not found in $out/withoptions.pb.h"; exit 1)
+    grep -q "pb_byte_t uuid\[16\]" $out/withoptions.pb.h || (echo "error: uuid is not of type pb_byte_t and of size 16 in $out/withoptions.pb.h"; exit 1)
+    grep -q "FIXED_LENGTH_BYTES, uuid" $out/withoptions.pb.h || (echo "error: uuid is not of fixed lenght bytes in $out/withoptions.pb.h"; exit 1)
+    grep -q "#define WithOptions_size" $out/withoptions.pb.h || (echo "error: the size of WithOptions is not known in $out/withoptions.pb.h"; exit 1)
+  '';
+}

pkgs/development/libraries/nanopb/test-message-with-options/withoptions.options

···
+ WithOptions.uuid max_size:16 fixed_length:true

pkgs/development/libraries/nanopb/test-message-with-options/withoptions.proto

···
+syntax = "proto3";
+
+message WithOptions {
+  bytes uuid = 1;
+}

pkgs/development/libraries/nanopb/test-simple-proto2/default.nix

···
+{ stdenv, protobuf, nanopb }:
+
+stdenv.mkDerivation {
+  name = "nanopb-test-simple-proto2";
+  meta.timeout = 60;
+  src = ./.;
+
+  # protoc requires any .proto file to be compiled to reside within it's
+  # proto_path. By default the current directory is automatically added to the
+  # proto_path. I tried using --proto_path ${./.} ${./simple.proto} and it did
+  # not work because they end up in the store at different locations.
+  installPhase = ":";
+  buildPhase = ''
+    mkdir $out
+
+    ${protobuf}/bin/protoc --plugin=protoc-gen-nanopb=${nanopb}/bin/protoc-gen-nanopb --nanopb_out=$out simple.proto
+  '';
+
+  doCheck = true;
+  checkPhase = ''
+    grep -q SimpleMessage $out/simple.pb.c || (echo "ERROR: SimpleMessage not found in $out/simple.pb.c"; exit 1)
+    grep -q SimpleMessage $out/simple.pb.h || (echo "ERROR: SimpleMessage not found in $out/simple.pb.h"; exit 1)
+  '';
+}

pkgs/development/libraries/nanopb/test-simple-proto2/simple.proto

···
+syntax = "proto2";
+
+message SimpleMessage {
+  required int32 lucky_number = 1;
+}

pkgs/development/libraries/nanopb/test-simple-proto3/default.nix

···
+{ stdenv, protobuf, nanopb }:
+
+stdenv.mkDerivation {
+  name = "nanopb-test-simple-proto3";
+  meta.timeout = 60;
+  src = ./.;
+
+  # protoc requires any .proto file to be compiled to reside within it's
+  # proto_path. By default the current directory is automatically added to the
+  # proto_path. I tried using --proto_path ${./.} ${./simple.proto} and it did
+  # not work because they end up in the store at different locations.
+  installPhase = ":";
+  buildPhase = ''
+    mkdir $out
+
+    ${protobuf}/bin/protoc --plugin=protoc-gen-nanopb=${nanopb}/bin/protoc-gen-nanopb --nanopb_out=$out simple.proto
+  '';
+
+  doCheck = true;
+  checkPhase = ''
+    grep -q SimpleMessage $out/simple.pb.c || (echo "ERROR: SimpleMessage not found in $out/simple.pb.c"; exit 1)
+    grep -q SimpleMessage $out/simple.pb.h || (echo "ERROR: SimpleMessage not found in $out/simple.pb.h"; exit 1)
+  '';
+}

pkgs/development/libraries/nanopb/test-simple-proto3/simple.proto

···
+syntax = "proto3";
+
+message SimpleMessage {
+  int32 lucky_number = 1;
+}