Re: [PATCH] doc: make HTML manual reproducible
On Tue, 1 Dec 2020 at 16:41, Todd Zullinger <tmz@pobox.com> wrote:
> Arnout Engelen wrote:
> > This makes sure the generated id's inside the html version of the
> > documentation use the same id's when the same version of the
> > manual is generated twice.
Thanks for this. Your mail still hasn't reached me through the list, so I'm replying to Todd's reply here.
Looking through the word-diff of the resulting user-manual.html, I see basically three changes. I've applied some light copy-editing to try to make them more readable (the lack of spaces means the notion of "word" diff is a bit off). Do you also have these three changes?
1. <a name=[-"idp1"-]{+"id-1"+}></a>Git User Manual</h1> 2. <a href=[-"#idp2"-]{+"#id-1.2"+}></a> 3. <a name=[-"idp2"-]{+"id-1.2"+}></a>These names and links don't strike me as particularly useful. But even so, reproducibility makes sense. I guess you're not really after linking to these, but want to have binary-identical user-manual.html when building from the same commit?
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> > @@ -380,7 +380,7 @@ SubmittingPatches.txt: SubmittingPatches
> > $(QUIET_GEN) cp $< $@
> >
> > XSLT = docbook.xsl
> > -XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css
> > +XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css --stringparam generate.consistent.ids 1
Nit: Maybe add a new line
XSLTOPTS += --stringparam generate.consistent.ids 1
instead to keep within 80 characters.
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> I think this would raise the minimum supported version of
> docbook-xsl to 1.77.1. That might be fine, but we'd
> probably want to make sure it doesn't negatively impact
> OS/distributions which build the docs as a likely group who
> care about reproducible builds. And we'd want to update the
> requirement in INSTALL, of course.
Thanks for digging out the version number. Agreed that this change should be reflected in INSTALL.
> The minimum docbook-xsl version was raised from 1.73 to
> 1.74, in 5a80d85bbe (INSTALL: drop support for docbook-xsl
> before 1.74, 2020-03-29). That change was discussed in
> <cover.1585486103.git.martin.agren@gmail.com>¹.
As mentioned there, it's not like I went out and tested with 1.74. So whether we *actually* support 1.74 right now is anyone's guess.
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> AFAICT, the generate.consistent.ids param was added in
> docbook-xsl-1.77.1 which was released in June 2012. The
> commit which added it is 74735098e (New param to support
> replacing generate-id() with xsl:number for more consistent
> id values., 2011-10-24).
>
> In any case, a minimum of 1.77.1 is present in the supported
> releases of CentOS/RHEL and Debian/Ubuntu, at least (most
> have 1.79.x). Those are certainly not the only systems Git
> cares about; they're simply the systems with which I am at
> least mildly familiar.
Seems to me like we can go with a change like this. If you're on a pre-1.77.1 system and want user-manual.html, but don't want to update your tool chain, you should still be able to clone the "htmldocs" repo. I'm not sure exactly where the cut-off point is, but I think moving up to mid-2012 should be ok.
Martin
