Re: [Pkg-javascript-devel] JavaScript policy?

2014-03-29 Thread Emilien Klein
2014-03-28 0:28 GMT+01:00 Ben Finney ben+deb...@benfinney.id.au:
 Emilien Klein emilien+deb...@klein.st writes:

 Let's take the example of jquery-lazyload [0].

 Both these files are provided in the upstream tarball:
 - jquery.lazyload.js
 - jquery.lazyload.min.js

 With the second one being the minified form of the first one.

 How will you guarantee that ‘jquery.lazyload.js’ is the corresponding
 source for the file ‘jquery.lazyload.min.js’? How will you guarantee
 that holds true every time a new version is released upstream?

As we can't make sure we're minimizing the file exactly the same way
upstream does, would comparing doubly-minified files work (I need to
try, but no suitable computer had hand just now):

Provided by upstream:
- File A: unminified .js
- File B: Upstream-provided .min.js

Debian minifies file A:
File C: Debian-minified file A

Debian minifies files B and C with the same options (e.g. drop
copyright notice) to get at the same minified content:
File D: Debian-minified file C
File E: Debian-minified file B

Validation check:
If File D and File E are equal, then we can assure file B was minified
from file A by upstream.

I'll try this out for lazyload and report back.

Should the check fail, the package does not build (and then we
repackage). Recheck by next package to see if repackageing is still
necessary.

I feel there is more value in shipping the upstream tarball (if we can
assure the minified file comes from the supplied source), as
repackaging is an extra step that could theoretically go wrong.

+Emilien

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Re: [Pkg-javascript-devel] JavaScript policy?

2014-03-29 Thread Ben Finney
Ben Finney ben+deb...@benfinney.id.au writes:

 There is a method for [ensuring that every Debian release of the
 source package ships no files without corresponding source]:

 Don't distribute the minified file from upstream; instead, distribute
 only the source form of the work, and compile a minified file during
 the build of the binary package.

 What other method do you propose for keeping our promise in the Social
 Contract? Does it meet that promise with as much certainty as the method
 I propose above?

Emilien Klein emilien+deb...@klein.st writes:

 2014-03-28 0:28 GMT+01:00 Ben Finney ben+deb...@benfinney.id.au:
  Emilien Klein emilien+deb...@klein.st writes:
 
  Let's take the example of jquery-lazyload [0].
 
  Both these files are provided in the upstream tarball:
  - jquery.lazyload.js
  - jquery.lazyload.min.js
 
  With the second one being the minified form of the first one.
 
  How will you guarantee that ‘jquery.lazyload.js’ is the corresponding
  source for the file ‘jquery.lazyload.min.js’? How will you guarantee
  that holds true every time a new version is released upstream?

 As we can't make sure we're minimizing the file exactly the same way
 upstream does, would comparing doubly-minified files work (I need to
 try, but no suitable computer had hand just now): […]

 Validation check:
 If File D and File E are equal, then we can assure file B was minified
 from file A by upstream.

 I'll try this out for lazyload and report back.

 Should the check fail, the package does not build (and then we
 repackage). Recheck by next package to see if repackageing is still
 necessary.

This is significantly more complex and more prone to false positives,
than simply dropping the non-source files from the source package, as I
propose.

 I feel there is more value in shipping the upstream tarball (if we can
 assure the minified file comes from the supplied source), as
 repackaging is an extra step that could theoretically go wrong.

I think you're engaging in wishful thinking. The process you propose has
more steps to go wrong, and more points of potential error, than simply
dropping the non-source files from the source package.

-- 
 \ “If nature has made any one thing less susceptible than all |
  `\others of exclusive property, it is the action of the thinking |
_o__)  power called an idea” —Thomas Jefferson |
Ben Finney


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Re: [Pkg-javascript-devel] JavaScript policy?

2014-03-29 Thread Emilien Klein
2014-03-29 9:57 GMT+01:00 Emilien Klein emilien+deb...@klein.st:
 I feel we are stuck. In the intent to bring this discussion to a
 close, would you strongly disagree if I ask the question on the -devel
 mailing list?

Let me rephrase that:
I will send a draft of the email on our js mailing list, presenting
both sides on this question.
All will have a say to make this better, and then I'll send it to -devel.

I'll likely have some time this afternoon.
   +Emilien


 I feel it would be beneficial (regardless of the way in which the
 discussion goes there) to include developers that might have a broader
 view of the landscape, maybe a bit less down into the specifics of js
 packaging as we are. We can then record the final decision on our
 policy page and close out this time-consuming discussion.

 Have a great Saturday!
+Emilien

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Re: [Pkg-javascript-devel] JavaScript policy?

2014-03-29 Thread François-Régis
Hi Marcello, Hi Emilien

Le 29/03/2014 22:33, Marcelo Jorge Vieira a écrit :
 On Sat, 2014-03-29 at 10:33 +0100, Emilien Klein wrote:
 2014-03-29 9:57 GMT+01:00 Emilien Klein emilien+deb...@klein.st:
 I feel we are stuck. In the intent to bring this discussion to a
 close, would you strongly disagree if I ask the question on the -devel
 mailing list?

 Let me rephrase that:
 I will send a draft of the email on our js mailing list, presenting
 both sides on this question.
 All will have a say to make this better, and then I'll send it to -devel.
 
 Just to remember, two year ago this topic was discussed in the
 debian-devel list.
 
 https://lists.debian.org/debian-devel/2012/08/threads.html#00365

Thank you Marcello for this very interesting thread. By the way it's not
addressing exactly the question of *this* thread. It originally talks
about sources tarball providing minified files and no sources (and where
evently sources could exists elsewhere in debian).

As initiator of the thread, I may recall that the question we ask is
Should we remove from source tarball minified versions of source files
existing in tarball. And of course nobody imagines to use those
minified files in binary package.

In the current thread, David clearly says we can keep them [1] and Ben
[2] suggests that it's better to remove the minified files from orig
tarball. And in an other thread [3], Marcello said we have to remove them.

[1]
http://lists.alioth.debian.org/pipermail/pkg-javascript-devel/2014-March/007214.html
[2]
http://lists.alioth.debian.org/pipermail/pkg-javascript-devel/2014-March/007242.html
[3]
http://lists.alioth.debian.org/pipermail/pkg-javascript-devel/2014-March/007176.html

-

I've detail read the thread from Marcello which is mainly beside the
subject we are talking about and without quoting too much, what I've
understood is that providing both source and minified version makes a
consensus. I may have a wrong undestanding of the discussion so if
anybody else could have look and gives return...

Beside, the question of the trust we can have on the fact that the
minified file is safe, which Emilien propose to verify, is only adressed
to people using source package outside debian, and from this POV, we may
perhaps make some checks as these are kinds of executable files. But we
just feel happy when we have xcf, scg or what else source for jpeg, png,
tiff or whatever format and we are still unable to prove that they are
compile from sources.

Hope that this until - will help to the clearify the question.

Cheers,


-- 
François-Régis



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