[llvm-dev] Deprecation of the LLVM SVN server

Wed Jan 13 17:06:11 PST 2021

On Wed, Jan 13, 2021 at 4:31 PM Michael Kruse <llvmdev at meinersbur.de> wrote:

> This is a good solution. Thank you. Although I wonder how well Apache
> can copy with that many rewrite rules.
>

I don't know, I'll keep an eye on the load, so far so good (see below).

Note that:
1) The rules are loaded in the apache2 config and not in the .htaccess (I'm
not sure but I'd suspect the later to may incur some cost on a per-request
basis?)
2) I first match negatively match the pattern (the common case), before
going through the huge amount of individual rules:

RewriteCond %{REQUEST_URI} !^/rL[0-9]*$ RewriteRule ^(.*)$
/index.php?__path__=$1 [B,L,QSA] # Config for SVN -> GIT url rewrite
Include ...../svn_url_rewrite.apache.conf
[image: Screen Shot 2021-01-13 at 5.01.58 PM.png]

Best,

-- 
Mehdi

>
> Michael
>
> Am Mi., 13. Jan. 2021 um 15:30 Uhr schrieb Mehdi AMINI via llvm-dev
> <llvm-dev at lists.llvm.org>:
> >
> > I generated apache2 rewrite rules for these URLs to redirect to the
> monorepo equivalent:
> >
> > $ git rev-list 40c47680eb2a1cb9bb7f8598c319335731bd5204  | while read
> commit ; do SVNREV=$(git log --format=%B -n 1 $commit | grep '^llvm-svn:
> [0-9]*$' | awk '{print $2 }') ; [[ ! -z "$SVNREV" ]] && echo "RewriteRule
> ^/rL$SVNREV /rG$commit [R=301,L]" ;  done
> > RewriteRule ^/rL375504 /rG40c47680eb2a1cb9bb7f8598c319335731bd5204
> [R=301,L]
> > RewriteRule ^/rL375503 /rG3ef017d0669e0dfa7e34a6e58d80c8f307db6d8c
> [R=301,L]
> > RewriteRule ^/rL375502 /rG95290827d7d01c63ac57b2cf5204215ba4ee4b06
> [R=301,L]
> > RewriteRule ^/rL375501 /rGe4af9de36ca60483040af381edd10e716e7b077d
> [R=301,L]
> > RewriteRule ^/rL375500 /rGe5dd30f77e10b3fa3395312045c06e5e15f9620e
> [R=301,L]
> > RewriteRule ^/rL375499 /rG5b99c189b3bfc0faa157f7ca39652c0bb8c315a7
> [R=301,L]
> > RewriteRule ^/rL375498 /rG734c74ba14be0f4421ccd9f720e5b9309248e0f7
> [R=301,L]
> > RewriteRule ^/rL375497 /rGf2c8f3b181e1a0f1a45e6893d15317386bf73977
> [R=301,L]
> > ...
> >
> >
> > It's in place now on phabricator.
> >
> > --
> > Mehdi
> >
> >
> > On Wed, Jan 13, 2021 at 11:07 AM Reid Kleckner <rnk at google.com> wrote:
> >>
> >> Could we copy the entire SVN repo into the Phab instance, so it can
> satisfy its svn queries from the local filesystem?
> >>
> >> On Tue, Jan 12, 2021 at 7:57 PM Mehdi AMINI via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >>>
> >>> Hi,
> >>>
> >>> Can you clarify why is this important or why is a feature we need to
> preserve? Are these URLs posted and referenced anywhere?
> >>>
> >>> The whole "LLVM repo" in phabricator is disabled right now and can't
> be browsed really: https://reviews.llvm.org/diffusion/L/ ; phab only
> provides a frontend for the repository, not an entire copy of it I believe.
> >>>
> >>> Thanks,
> >>>
> >>> --
> >>> Mehdi
> >>>
> >>>
> >>>
> >>> On Tue, Jan 12, 2021 at 7:25 PM Mike Edwards <mike at sqlby.me> wrote:
> >>>>
> >>>> Hi Nathan,
> >>>>
> >>>> Bummer!  I had no idea Phabricator was connected to the SVN server in
> this way.  I'll have to see if I can get a conversation going with the
> Phabricator maintainers and see if there is a way we can address this.
> Thanks for the heads up.
> >>>>
> >>>> -Mike
> >>>>
> >>>> On Tue, Jan 12, 2021 at 5:05 PM Nathan James <n.james93 at hotmail.co.uk>
> wrote:
> >>>>>
> >>>>> On Wed, 2020-12-09 at 15:01 -0800, Mike Edwards via llvm-dev wrote:
> >>>>> > Hi,
> >>>>> > This is just a friendly reminder of the upcoming deprecation and
> >>>>> > shutdown of the SVN server.  As announced during the last US
> >>>>> > Developers Conference, way back in 2019, the SVN server would
> remain
> >>>>> > in a read-only state for 1 year.  It has been more than a year now
> >>>>> > and it is time to let the server enjoy a well deserved retirement.
> >>>>> > We are planning on turning the service off on January 5th, 2021.
> >>>>> > Please plan accordingly if, for some reason, you are still reliant
> on
> >>>>> > the SVN service being available.  Thanks for your time and
> >>>>> > attention.  I hope you all are having a nice day and staying safe.
> >>>>> >
> >>>>> > Respectfully,
> >>>>> > Mike Edwards
> >>>>> > _______________________________________________
> >>>>> > LLVM Developers mailing list
> >>>>> > llvm-dev at lists.llvm.org
> >>>>> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >>>>>
> >>>>> Hi Mike,
> >>>>>
> >>>>> Not sure if anyone else has brought this up, but since turning the
> svn
> >>>>> server off, phab is no longer able to display commit details for
> older
> >>>>> commits to the svn server.
> >>>>>
> >>>>> https://reviews.llvm.org/rL202984
> >>>>> As an example, results in an error like this:
> >>>>>
> -----------------------------------------------------------------------
> >>>>> Command failed with error #1!
> >>>>> COMMAND
> >>>>> svn --non-interactive --no-auth-cache --trust-server-cert cat
> >>>>>
> https://llvm.org/svn/llvm-project/llvm/trunk/include/llvm/ADT/IntrusiveRefCntPtr.h@202983
> >>>>>
> >>>>> STDOUT
> >>>>> (empty)
> >>>>>
> >>>>> STDERR
> >>>>> svn: E170013: Unable to connect to a repository at URL '
> >>>>>
> https://llvm.org/svn/llvm-project/llvm/trunk/include/llvm/ADT/IntrusiveRefCntPtr.h
> '
> >>>>> svn: E175013: Access to '/svn/llvm-
> >>>>> project/llvm/trunk/include/llvm/ADT/IntrusiveRefCntPtr.h' forbidden
> >>>>>
> -----------------------------------------------------------------------
> >>>>>
> >>>>> Im guessing this is an issue that needs solving on the phabricator
> side
> >>>>> of things?
> >>>>>
> >>>>> ~Nathan James
> >>>>>
> >>>>>
> >>> _______________________________________________
> >>> LLVM Developers mailing list
> >>> llvm-dev at lists.llvm.org
> >>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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