Try using sbt-header v2 for our copy headers

[ktoso]

As people keep forgetting to add the headers, and @hseeberger claims the v2.0 is much stabler than the initial version (which we attempted to use, but failed back them).

https://github.com/sbt/sbt-header (same for akka eventually, if we work it out here)

[jiminhsieh]

I tried sbt-header v3 locally. It produced this:

/*
 * Copyright 2014 Lightbend
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

This is the original header:

/**
 * Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
 */

Which one you would like to use?
If you want to use original header, it would need to write a custom license header in build.sbt.

[ktoso]

We should keep the "original header", license is in the LICENSE file, we don't add it to all files.

[ktoso]

Thanks for trying!

[jiminhsieh]

I have some questions of current header.

1. There are 3 types of copyright text.
   1.1. Copyright (C) 2017 Lightbend Inc. <http://www.lightbend.com> Which is the suggestion of copyright text.
   1.2. Copyright (C) 2009-2017 Lightbend Inc. <http://www.lightbend.com>
   1.3. Copyright (C) 2009-2017 Typesafe Inc. <http://www.typesafe.com>

2. There are 3 types of comment style.
   2.1.
   2.2.
   2.3.
   2.1 could be supported from sbt-header directly. 2.2 and 2.3 may be supported with extra code.

[jiminhsieh]

I could read LICENSE as text of header then set-header would try to insert to source code. But it would make lots of changes. Or maybe I could send a PR to let all of you know what's look like.

[ktoso]

The formatting style we should use is 2.1.

As for the dates - the date "from" is when the file was first committed and the latter is the current year. Perhaps we could be ok with the "2009 - current year" but I'm not a lawyer...

// cc @patriknw

[jiminhsieh]

I found there are some codes are not using Lightbend copyright. I would list some of those I think you would want to know first.

• Come from Shapeless

  • All of codes in this package - akka-http/akka-parsing/src/main/scala/akka/shapeless

• Base64

  • It seems to come from https://sourceforge.net/projects/migbase64/.
  • It is under BSD License.
  • It should be exclude when placing Lightbend copyright in header.

• Most codes in package - akka-http/akka-parsing/src/main/scala/akka/parboiled2

  • Copyright (C) 2009-2017 Mathias Doenitz, Alexander Myltsev

[ktoso]

And more, like the shaded protobuf.

In such cases both headers must be retained, the original one and the lightbend one can be added.