From mboxrd@z Thu Jan  1 00:00:00 1970
From: Danny Milosavljevic <dannym@scratchpost.org>
Subject: bug#27563: [PATCH v3 0/2] Make ghostscript reproducible.
Date: Fri, 7 Jul 2017 20:20:31 +0200
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To: Ludovic =?UTF-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: 27563@debbugs.gnu.org

On Fri, 07 Jul 2017 19:51:10 +0200
ludo@gnu.org (Ludovic Court=C3=A8s) wrote:

> For CreationDate/ModDate, I think it should honor SOURCE_DATE_EPOCH as
> in
> <https://anonscm.debian.org/git/printing/ghostscript.git/tree/debian/patc=
hes/2010_add_build_timestamp_setting.patch?id=3De2bf3ad7026afe13636d4937430=
c3fdae7854078>.

Really?  I've been leaving them off, too.  Especially because of this funny=
 comment in the upstream ghostscript:

/* Initialize the IDs allocated at startup. */
void
pdf_initialize_ids(gx_device_pdf * pdev)
{
...
    /*
     * Acrobat Distiller sets CreationDate and ModDate to the current
     * date and time, rather than (for example) %%CreationDate from the
     * PostScript file.  We think this is wrong, but we do the same.
     */
    {
... proceed to set CreationDate and ModDate to the current time.
    }
}

> For the two UUIDs (and =E2=80=9CID=E2=80=9D too?), maybe we can use, say,
> GS_GENERATE_UUIDS; if set to 0 or =E2=80=9Cno=E2=80=9D it=E2=80=99s disab=
le, otherwise it=E2=80=99s
> enabled.

That would look like this:

if (!getenv("GS_GENERATE_UUIDS") || strcmp(getenv("GS_GENERATE_UUIDS"), "0"=
) =3D=3D 0 || strcmp(getenv("GS_GENERATE_UUIDS"), "no") =3D=3D 0) ...

> > Also, where would we set it so the build processes of all the other
> > packages actually pick it up? =20
>=20
> Eventually we can add it to gnu-build-system.scm, but for now, given
> that core-updates is well built, we should add it on a case-by-case
> basis.  I don=E2=80=99t think there are that many packages that produce P=
DFs,
> but I could be wrong.

Okay :)
=09