Hi everyone, To keep up with protocol-buffers 2.0.3 here is an improved Haskell "hprotoc" version 1.2.2 : http://hackage.haskell.org/cgi-bin/hackage-scripts/package/protocol-buffers http://hackage.haskell.org/cgi-bin/hackage-scripts/package/protocol-buffers-... http://hackage.haskell.org/cgi-bin/hackage-scripts/package/hprotoc The darcs repository with all 3 packages is at http://darcs.haskell.org/packages/protocol-buffers2/ These ought to be compatible with the previous version 1.2.1. As usual, this code read a ".proto" file which describes message formats and generates Haskell modes to encode and decode corresponding data type to the binary wire format. Google's original protocol buffers are at http://code.google.com/apis/protocolbuffers/docs/overview.html and generate code for C++, Python, and Java. Other languages are listed on the wiki at http://code.google.com/p/protobuf/wiki/OtherLanguages (including Haskell). The two changes are support for the field-option-like syntax for EnumValueOptions, and adjacent string literals are concatenated. Note that strings are checked for valid utf8 encoding after concatenation, not individually. But backslash escape codes are decoded for each individual string, not after concatenation. If these quirks become problems they can be changed. The protoc bug fixed in 2.0.3:

* Fixed bug where .proto files which use custom options but don't actually define them (i.e. they import another .proto file defining the options) had to explicitly import descriptor.proto." did not affect hprotoc, which already did the Right Thing™ (I just tested to be sure).

The protoc bug fixed in 2.0.3:

* If an input file is a Windows absolute path (e.g. "C:\foo\bar.proto") and the import path only contains "." (or contains "." but does not contain the file), protoc incorrectly thought that the file was under ".", because it thought that the path was relative (since it didn't start with a slash). This has been fixed. is unlikely to be be present in hprotoc. But since I never run or test on Windows I make no promises hprotoc is finding the correct relative paths on Windows.

Cheers, Chris Kuklewicz