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Must ALL or SOME source code dists have license notice in each file?

Preview Firefox releases strip the license block from included source
js and xul files.

Mozilla Public License 1.1 says:

  [MPL1.1 sec3.5] You must duplicate the notice in Exhibit A in each file
  of the Source Code.  If it is not possible to put such notice in a
  particular Source Code file due to its structure, then You must
  include such notice in a location (such as a relevant directory) where
  a user would be likely to look for such a notice.

  [MPL1.1 sec1.11] "Source Code" means the preferred form of the
  Covered Code for making modifications to it, ... The Source Code can
  be in a compressed or archival form...

(Note that the exception, "If it is not possible to put such a notice
in a particular Source Code file due to its structure", does not apply
to any text source code syntax that allows multiple comment lines.)

Does sec3.5 mean
A. ALL distributions of source code must have the license block in
   each file of the source code, or
B. SOME distribution of source code must have the license block in
   each file of the source code
?

In other words, is it ok to distribute source code where the license
block has been stripped out of source files (say, to save space and
bandwidth), as long as you also make available source code where the
license block has not been stripped out?

Arguments for 'A' and against 'B':

  Spirit: distributing copies of the source code without the
  owner's license in each file makes it more likely that source code
  will be illegally redistributed.  (Someone who as only a copy
  without the license blocks is more likely to modify and redistribute
  it without understanding they need to get and distribute source with
  the license blocks, or to redistribute just part of the source and
  inadvertently leave out the license.)

  (Marketing: some paranoid organizations may shun all the code for
  fear of misusing source that wasn't clearly identified...)

  (Technical: stripping the license block messes up the code line
  numbers in error reports.)

An argument for 'B' and against 'A':

  Technical: Distributing copies of the source code without the
  owner's license permits smaller executable distributions that
  include source code (such as xul and js files), at least using
  compression technology that does not compress across files (such as
  individual zip/jar files).

  (A workaround is to a create a zip (jar) file whose entries are not
  compressed, and then compress the whole zip [jar] file together inside
  another zip [xpi] file, so strings that are shared across file entries
  are discovered and compressed.  This reduces xpi size, at expense of
  larger installed jar size.)

Xul and js files in preview Firefox jars have the license block
stripped out which assumes 'B', but that might be an oversight by FF
developers.

The discussions of section 3.5 in n.p.m.license seem only to say that
the intent is to include the license block on every file, and do not
discuss stripping license blocks from js and xul files for runtime
distribution.

Re: Must ALL or SOME source code dists have license notice in each file?

Geka M wrote:

>   [MPL1.1 sec1.11] "Source Code" means the preferred form of the
>   Covered Code for making modifications to it, ... The Source Code can
>   be in a compressed or archival form...

I would say that the XUL and JS, as shipped with the preview release, is 
not the preferred form for making modifications. For example, the 
Windows build has all the MAC OS X-specific bits stripped out by the 
same preprocessor which removes the license blocks.

So we should make the full source code available, as the license 
requires, but the shipped versions do not need it.

Having said that, I designed the new machine-readable license blocks so 
that they have a summary line which can be retained by any stripping 
mechanism. It's rather sad that this isn't happening. I suspect, though, 
  that it requires changes to the preprocessor.

Gerv

Re: Must ALL or SOME source code dists have license notice in each file?

Gervase Markham wrote:
> 
> I would say that the XUL and JS, as shipped with the preview release, is 
> not the preferred form for making modifications. For example, the 
> Windows build has all the MAC OS X-specific bits stripped out by the 
> same preprocessor which removes the license blocks.

Yes, definitely the *.jar files are not "source" code, they are processed
and packaged. It's confusing that it looks like source, though. Perhaps it
could be easily solved by putting a copyright/license file at the top of
each archive, or a copyright comment in the zip archive itself (zip -z "This
file copyright Mozilla Foundation. Source available under the MPL at...").

I don't know how many people would notice an archive comment, an obvious
explanatory file at the top level might be best. Double-plus good because
we'd then have a place to describe the copyright and trademark status of the
images in the file.

-Dan Veditz

Re: Using MPL covered components in application

Marko Lahtinen wrote:

> I was thingking about putting a splashscreen to my app. Can you give me a
> short example what to write to
> the splashscreen about the part that uses the MPL licensed component ?

It doesn't necessarily have to be in the splash screen. Basically, just 
read the MPL and do what it says.

Gerv

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