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From Nick North <>
Subject Re: 2.0 & Windows: status update
Date Sun, 19 Jun 2016 15:56:08 GMT
I'm trying these tests now, and find that there are still a lot of JS
failures with a single cluster. Many of them look suspiciously similar at
an initial glance, but I hope to look in more detail tomorrow.


On Sun, 19 Jun 2016 at 15:20 Jan Lehnardt <> wrote:

> > On 17 Jun 2016, at 22:48, Joan Touzet <> wrote:
> >
> > Hello everyone,
> >
> > I'd like to update the community on the status of the 2.0 port to
> Microsoft Windows. There are three parts to this email: the build
> tools/chain themselves, support in CouchDB for the Windows build process,
> and testing results. I'll cover them in that order.
> >
> > -Joan
> >
> > Build Tools/Chain
> > =================
> > ** TL;DR: New glazier repo to join couchdb, contains scripts and README
> to build CouchDB 2.0 on Windows.
> >
> > Our work to date has been going on in Dave Cottlehuber's glazier
> repository at
> >
> >
> >
> > The reason for the extra repository is that the Windows build process is
> *very* ugly, involving 3 distinct build chains (Visual Studio, Cygwin and
> the Mozilla Build system) to build all of the necessary prerequisites. The
> repository includes a number of support scripts to set up that environment,
> a README with a detailed walkthrough, and some patches necessary to the
> prerequisites to get them to build under the modern Windows b uild system.
> >
> > Parenthetically, it _is_ possible to use binary installs for the
> prerequisites (OpenSSL, libcurl, Erlang, SM 1.8.5), but Dave, Nick North
> and I have evolved the glazier system over a number of years and it's
> proven quite effective. Plus, we don't have to worry about the provenance
> of any of the binaries since we build everything from source directly, and
> that's important when we put up an unofficial Windows build for download at
> .
> >
> > Good news: as of today I've requested and Infra has created a new apache
> couchdb-glazier repo, and it's my intent to mirror dch/glazier over into
> the ASF's repo once things have stabilized a bit more (PR and merge of the
> release/couchdb_2.0 branch, and pending progress on steps 2 and 3 below).
> Dave and I did an audit of the repository as it stands, and since all
> checkins come from CouchDB contributors already, we are good to go from a
> licensing perspective.
> >
> >
> > Overall CouchDB Windows support
> > ===============================
> > ** TL;DR: Windows support in 2.0 a priority, conversion of top-level
> Makefile in progress.
> >
> > There are two aspects to native CouchDB Windows support. The first is
> anything within the CouchDB code itself that assumes a Unix-like
> environment. Fortunately, most of these problems have been worked out in
> prior releases. I'm not aware of any outstanding issues here (except one
> point below under test results).
> >
> > The other aspect is the build setup within the couchdb repo itself. I've
> already converted the bash configure script into a PowerShell configure
> script that works fine. However, the Makefile has bashisms in it and
> assumes GNU Make. I've started a conversion of this into Windows NMake
> format and will submit a PR for a in due course.
> >
> > I want to answer two frequent questions we get here before they get
> re-asked:
> >
> >  1) Why not use a cygwin environment to retain compatibility with the
> Unix build process? The answer is that performance suffers, the build chain
> is onerous, there are link-time problems when trying to link against things
> built using Visual Studio, and there are still assumptions on paths that
> don't work out. We can't get away from making Windows-specific
> customizations to the build process anyway, so we might as well take the
> extra step and support the build process properly. It's not THAT much work
> to convert the Makefile and configure script, and our top-level Makefile
> really isn't much more than a shell script anyway (every target is a .PHONY
> target!). In fact, a TODO for an enterprising developer might be to rewrite
> our top-level Makefile/ as a Python script that "does the right
> thing" on both platforms, the same way our dev/run script works today.
> >
> >  2) Why not use the new "Bash and Ubuntu on Windows" functionality
> Microsoft has announced for Windows 10? There are two distinct problems
> here. The first is that there is a very large install base still of Windows
> 7 and 8 (and Windows Server) machines that cannot run this subsystem. The
> second is that Microsoft themselves say this about the functionality:
> >
> >     "Second, while you’ll be able to run native Bash and many Linux
> command-line tools on Windows, it’s important to note that this is a
> developer toolset to help you write and build all your code for all your
> scenarios and platforms. This is not a server platform upon which you will
> host websites, run server infrastructure, etc."
> >
> > Given this strong warning from Microsoft themselves (which hints at
> performance consideratings), and the fact that download statistics show an
> equal number of downloads of the CouchDB .tar source and the Windows .zip
> installer from our website, we need to consider that
> people are running CouchDB on Windows not just as a developer tool but as a
> fully-fledged server. As such it behooves us to build it "properly" as a
> normal Windows binary/service.
> >
> Great progress Joan! Thank you! :)
> > Test Results
> > ============
> > ** TL;DR: Lots of things are failing. Joan needs help interpreting the
> results or she will go around the bend.
> >
> > Here are the current test results in gist form.
> >
> > EUnit:
> >
> > JS tests:
> >
> > For the EUnit tests, everything other than os_process stuff seems to be
> working. Honestly, I think we can release without os_process support on
> Windows, though I should file a bug to track this. I am actually inclined
> to disable os_process support on Windows and the related eunit tests rather
> than fix this rarely-needed functionality, unless someone on this list
> objects.
> You are probably thinking about CouchDB Externals, which definitely use
> os_process functionality and which I’d also be fine with dropping support
> for Windows for now, but os_process is also used by the view server, so we
> should definitely get them passing.
> > For the JS tests, a *lot* is failing. I need to know how much this
> differs from a Linux/OSX baseline today, can anyone help me follow up here?
> Can you try running these against a -n 1 cluster? We are not set up to run
> JS tests against more nodes at this point.
> On master/unix most if not all JS tests should either pass or skipped with
> a TODO message.
> Best
> Jan
> --

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