Generate js file from proto file with protoc v2.6.1

[tim8917]

What version of protobuf and what language are you using?
Version: v2.6.1
Language: JavaScript

What operating system (Linux, Windows, ...) and version?
Ubuntu Linux

What runtime / compiler are you using (e.g., python version or gcc version)

What did you do?
Steps to reproduce the behavior:

1. open my bash console
2. enter protoc --proto_path=src --js_out=library=whizz/ponycopter,binary:build/gen src/foo.proto src/bar/baz.proto from https://developers.google.com/protocol-buffers/docs/reference/javascript-generated
3. See error: protoc-gen-js: program not found or is not executable
   --js_out: protoc-gen-js: Plugin failed with status code 1.

What did you expect to see
a .js file generated from .proto

What did you see instead?
an error
error: protoc-gen-js: program not found or is not executable
--js_out: protoc-gen-js: Plugin failed with status code 1.

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment
Usage of v2.6.1 is the requirement

[acozzette]

We added support for JS in the 3.0 release, so unfortunately it's not possible to use JavaScript with 2.6.1.

[tim8917]

It would be great to mention that version restriction on the official page https://developers.google.com/protocol-buffers/docs/reference/javascript-generated