Projects that depend on tslib inherit the Microsoft copyright

Hello,

If I build an app that combines tslib with other code – e.g. use TypeScript in an app – as far as I understand the license header on https://github.com/Microsoft/tslib/blob/master/tslib.js, it requires me to include that copyright+license in the resulting product.

Is that intentional? I think when I use the TypeScript compiler without the --importHelpers flag, I do not have this additional requirement.

[DanielRosenwasser]

Hey all, after some internal discussion, we’re leaning towards relicensing tslib under the Zero-Clause BSD license. 0BSD is derived from the ISC license, but specifically differs in that it does not place any requirement on the copyright notice appearing in copies of the licensed work.

- Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. 
+ Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.

 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 

In the near future, we’ll be putting up a PR to replace the license. We’ll give the PR about 10 business days, and if there are no strong objections, we’ll pull the change in and publish a new version of tslib with the less-restrictive license.

[evmar]

LLVM is changing their license to a "“Apache 2.0 with LLVM Exception”, where the exception is a block at the end of the license to work around issues like these.

http://llvm.org/foundation/relicensing/ http://llvm.org/foundation/relicensing/LICENSE.txt (scroll to the bottom to see the exception)