Patchwork [V2] cvsps: fix computation of parent revisions when log caching is on

# HG changeset patch
# User Emanuele Giaquinta <emanuele.giaquinta@gmail.com>
# Date 1444206832 -10800
#      Wed Oct 07 11:33:52 2015 +0300
# Node ID 724877229b9a3b513c0f325bb362626d6ed46210
# Parent  a024e2db4553492e173032f52464e2c4efe0d4fa
cvsps: fix computation of parent revisions when log caching is on

cvsps computes the parent revisions of log entries by walking the cvs log
sorted by (rcs, revision) and by iteratively maintaining a 'versions'
dictionary which maps a (rcs, branch) pair onto the last revision seen for that
pair. When log caching is on and a log cache exists, cvsps fails to set the
parent revisions of new log entries because it does not iterate over the log
cache in the parents computation. A complication is that a file rcs can change
(move to/from the attic), with respect to its value in the log cache, if the
file is removed/added back. This patch adds an iteration over the log cache to
update the rcs of cached log entries, if changed, and to properly populate the
'versions' dictionary.

On Fri, Oct 09, 2015 at 03:29:35PM +0300, Emanuele Giaquinta wrote:
> # HG changeset patch
> # User Emanuele Giaquinta <emanuele.giaquinta@gmail.com>
> # Date 1444206832 -10800
> #      Wed Oct 07 11:33:52 2015 +0300
> # Node ID 724877229b9a3b513c0f325bb362626d6ed46210
> # Parent  a024e2db4553492e173032f52464e2c4efe0d4fa
> cvsps: fix computation of parent revisions when log caching is on

queued this, thanks

>
> cvsps computes the parent revisions of log entries by walking the cvs log
> sorted by (rcs, revision) and by iteratively maintaining a 'versions'
> dictionary which maps a (rcs, branch) pair onto the last revision seen for that
> pair. When log caching is on and a log cache exists, cvsps fails to set the
> parent revisions of new log entries because it does not iterate over the log
> cache in the parents computation. A complication is that a file rcs can change
> (move to/from the attic), with respect to its value in the log cache, if the
> file is removed/added back. This patch adds an iteration over the log cache to
> update the rcs of cached log entries, if changed, and to properly populate the
> 'versions' dictionary.
>
> diff -r a024e2db4553 -r 724877229b9a hgext/convert/cvsps.py
> --- a/hgext/convert/cvsps.py	Mon Oct 05 02:33:45 2015 -0700
> +++ b/hgext/convert/cvsps.py	Wed Oct 07 11:33:52 2015 +0300
> @@ -207,6 +207,7 @@
>      # state machine begins here
>      tags = {}     # dictionary of revisions on current file with their tags
>      branchmap = {} # mapping between branch names and revision numbers
> +    rcsmap = {}
>      state = 0
>      store = False # set when a new record can be appended
>
> @@ -439,6 +440,8 @@
>
>              log.append(e)
>
> +            rcsmap[e.rcs.replace('/Attic/', '/')] = e.rcs
> +
>              if len(log) % 100 == 0:
>                  ui.status(util.ellipsis('%d %s' % (len(log), e.file), 80)+'\n')
>
> @@ -446,6 +449,13 @@
>
>      # find parent revisions of individual files
>      versions = {}
> +    for e in sorted(oldlog, key=lambda x: (x.rcs, x.revision)):
> +        rcs = e.rcs.replace('/Attic/', '/')
> +        if rcs in rcsmap:
> +            e.rcs = rcsmap[rcs]
> +        branch = e.revision[:-1]
> +        versions[(e.rcs, branch)] = e.revision
> +
>      for e in log:
>          branch = e.revision[:-1]
>          p = versions.get((e.rcs, branch), None)
> diff -r a024e2db4553 -r 724877229b9a tests/test-convert-cvs.t
> --- a/tests/test-convert-cvs.t	Mon Oct 05 02:33:45 2015 -0700
> +++ b/tests/test-convert-cvs.t	Wed Oct 07 11:33:52 2015 +0300
> @@ -333,13 +333,35 @@
>  testing debugcvsps
>
>    $ cd src
> -  $ hg debugcvsps --fuzz=2
> +  $ hg debugcvsps --fuzz=2 -x >/dev/null
> +
> +commit a new revision changing a and removing b/c
> +
> +  $ cvscall -q update -A
> +  U a
> +  U b/c
> +  $ echo h >> a
> +  $ cvscall -q remove -f b/c
> +  cvs remove: use 'cvs commit' to remove this file permanently
> +  $ cvscall -q commit -mci
> +  Checking in a;
> +  $TESTTMP/cvsrepo/src/a,v  <--  a
> +  new revision: 1.3; previous revision: 1.2
> +  done
> +  Removing b/c;
> +  $TESTTMP/cvsrepo/src/b/c,v  <--  c
> +  new revision: delete; previous revision: 1.3
> +  done
> +
> +update and verify the cvsps cache
> +
> +  $ hg debugcvsps --fuzz=2 -u
>    collecting CVS rlog
> -  11 log entries
> -  cvslog hook: 11 entries
> +  13 log entries
> +  cvslog hook: 13 entries
>    creating changesets
> -  10 changeset entries
> -  cvschangesets hook: 10 changesets
> +  11 changeset entries
> +  cvschangesets hook: 11 changesets
>    ---------------------
>    PatchSet 1
>    Date: * (glob)
> @@ -466,5 +488,18 @@
>    Members:
>       b/c:1.1.2.1->1.1.2.2
>
> +  ---------------------
> +  PatchSet 11
> +  Date: * (glob)
> +  Author: * (glob)
> +  Branch: HEAD
> +  Tag: (none)
> +  Log:
> +  ci
> +
> +  Members:
> +     a:1.2->1.3
> +     b/c:1.3->1.4(DEAD)
> +
>
>    $ cd ..
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