tests/test-push-http.t

commit: improve the files field of changelog for merges

Currently, the files list of merge commits repeats all the deletions
(either actual deletions, or files that got renamed) that happened
between base and p2 of the merge. If p2 is the main branch, the list
can easily be much bigger than the change being merged.

This results in various problems worth improving:
- changelog is bigger than necessary
- `hg log directory` lists many unrelated merge commits, and `hg log
  -v -r commit` frequently fills multiple screens worth of files
- it possibly slows down adjustlinkrev, by forcing it to read more
  manifests, and that function can certainly be a bottleneck
- the server side of pulls can waste a lot of time simply opening the
  filelogs for pointless files (the constant factors for opening even
  a tiny filelog is apparently pretty bad)

So stop listing such files as described in the code.  Impacted merge
commits and their descendants get a different hash than they would
have without this. This doesn't seem problematic, except for
convert. The previous commit helped with that in the hg->hg case (but
if you do svn->hg twice from scratch, hashes can still change).

The rest of the description is numbers. I don't have much to report,
because recreating the files list of existing repositories is not
easy:
- debugupgradeformat and bundle/unbundle don't recreate the list
- export/import tends to choke quickly applying patches or on
  description that contain diffs,
- merge commits from the convert extension don't have the right files
  list for reasons orthogonal to the current commit
- replaying the merge with hg update/hg merge/hg revert --all/hg
  commit can end up failing in hg revert
- I wasn't sure that using debugsetparents + debugrebuilddirstate
  would really build the right thing

I measured commit time before and after this change, in a case with no
files filtered out, several files filtered out (no difference) and 5k
files filtered out (+1% time).

Recreating the 100 more recent merges in a private repo, the
concatenated uncompressed files lists goes from 1.12MB to
0.52MB. Excluding 3 merges that are not representative, then the size
goes from 570k to 15k.
I converted part of mozilla-central, and observed file list shrinking
quite a bit too, starting at the very first merge, 733641d9feaf, going
from 550 files to 10 files (although they have relatively few merges,
so they probably wouldn't care).

Differential Revision: https://phab.mercurial-scm.org/D6613

#require no-chg

#testcases bundle1 bundle2

#if bundle1
  $ cat << EOF >> $HGRCPATH
  > [devel]
  > # This test is dedicated to interaction through old bundle
  > legacy.exchange = bundle1
  > EOF
#endif

  $ hg init test
  $ cd test
  $ echo a > a
  $ hg ci -Ama
  adding a
  $ cd ..
  $ hg clone test test2
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd test2
  $ echo a >> a
  $ hg ci -mb
  $ req() {
  >     hg $1 serve -p $HGPORT -d --pid-file=hg.pid -E errors.log
  >     cat hg.pid >> $DAEMON_PIDS
  >     hg --cwd ../test2 push http://localhost:$HGPORT/
  >     exitstatus=$?
  >     killdaemons.py
  >     echo % serve errors
  >     cat errors.log
  >     return $exitstatus
  > }
  $ cd ../test

expect ssl error

  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  abort: HTTP Error 403: ssl required
  % serve errors
  [255]

expect authorization error

  $ echo '[web]' > .hg/hgrc
  $ echo 'push_ssl = false' >> .hg/hgrc
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  abort: authorization failed
  % serve errors
  [255]

expect authorization error: must have authorized user

  $ echo 'allow_push = unperson' >> .hg/hgrc
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  abort: authorization failed
  % serve errors
  [255]

expect success

  $ cat > $TESTTMP/hook.sh <<'EOF'
  > echo "phase-move: $HG_NODE:  $HG_OLDPHASE -> $HG_PHASE"
  > EOF

#if bundle1
  $ cat >> .hg/hgrc <<EOF
  > allow_push = *
  > [hooks]
  > changegroup = sh -c "printenv.py --line changegroup 0"
  > pushkey = sh -c "printenv.py --line pushkey 0"
  > txnclose-phase.test = sh $TESTTMP/hook.sh 
  > EOF
  $ req "--debug --config extensions.blackbox="
  listening at http://*:$HGPORT/ (bound to $LOCALIP:$HGPORT) (glob) (?)
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: redirecting incoming bundle to */hg-unbundle-* (glob)
  remote: adding changesets
  remote: add changeset ba677d0156c1
  remote: adding manifests
  remote: adding file changes
  remote: adding a revisions
  remote: added 1 changesets with 1 changes to 1 files
  remote: updating the branch cache
  remote: running hook txnclose-phase.test: sh $TESTTMP/hook.sh
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: running hook txnclose-phase.test: sh $TESTTMP/hook.sh
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: running hook changegroup: sh -c "printenv.py --line changegroup 0"
  remote: changegroup hook: HG_HOOKNAME=changegroup
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: remote:http:$LOCALIP: (glob)
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)
  $ req "--debug --config server.streamunbundle=True --config extensions.blackbox="
  listening at http://*:$HGPORT/ (bound to $LOCALIP:$HGPORT) (glob) (?)
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: add changeset ba677d0156c1
  remote: adding manifests
  remote: adding file changes
  remote: adding a revisions
  remote: added 1 changesets with 1 changes to 1 files
  remote: updating the branch cache
  remote: running hook txnclose-phase.test: sh $TESTTMP/hook.sh
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: running hook txnclose-phase.test: sh $TESTTMP/hook.sh
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: running hook changegroup: sh -c "printenv.py --line changegroup 0"
  remote: changegroup hook: HG_HOOKNAME=changegroup
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: remote:http:$LOCALIP: (glob)
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)
#endif

#if bundle2
  $ cat >> .hg/hgrc <<EOF
  > allow_push = *
  > [hooks]
  > changegroup = sh -c "printenv.py --line changegroup 0"
  > pushkey = sh -c "printenv.py --line pushkey 0"
  > txnclose-phase.test = sh $TESTTMP/hook.sh 
  > EOF
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: changegroup hook: HG_BUNDLE2=1
  remote: HG_HOOKNAME=changegroup
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)
#endif

expect success, server lacks the httpheader capability

  $ CAP=httpheader
  $ . "$TESTDIR/notcapable"
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: changegroup hook: HG_HOOKNAME=changegroup (no-bundle2 !)
  remote: changegroup hook: HG_BUNDLE2=1 (bundle2 !)
  remote: HG_HOOKNAME=changegroup (bundle2 !)
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: remote:http:$LOCALIP: (glob) (no-bundle2 !)
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)

expect success, server lacks the unbundlehash capability

  $ CAP=unbundlehash
  $ . "$TESTDIR/notcapable"
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: changegroup hook: HG_HOOKNAME=changegroup (no-bundle2 !)
  remote: changegroup hook: HG_BUNDLE2=1 (bundle2 !)
  remote: HG_HOOKNAME=changegroup (bundle2 !)
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: remote:http:$LOCALIP: (glob) (no-bundle2 !)
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)

expect success, pre-d1b16a746db6 server supports the unbundle capability, but
has no parameter

  $ cat <<EOF > notcapable-unbundleparam.py
  > from mercurial import extensions, httppeer
  > def capable(orig, self, name):
  >     if name == 'unbundle':
  >         return True
  >     return orig(self, name)
  > def uisetup(ui):
  >     extensions.wrapfunction(httppeer.httppeer, 'capable', capable)
  > EOF
  $ cp $HGRCPATH $HGRCPATH.orig
  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > notcapable-unbundleparam = `pwd`/notcapable-unbundleparam.py
  > EOF
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: phase-move: cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b:  draft -> public
  remote: phase-move: ba677d0156c1196c1a699fa53f390dcfc3ce3872:   -> public
  remote: changegroup hook: * (glob)
  remote: HG_HOOKNAME=changegroup (bundle2 !)
  remote: HG_HOOKTYPE=changegroup
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: remote:http:$LOCALIP: (glob) (no-bundle2 !)
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
  $ hg rollback
  repository tip rolled back to revision 0 (undo serve)
  $ mv $HGRCPATH.orig $HGRCPATH

Test pushing to a publishing repository with a failing prepushkey hook

  $ cat > .hg/hgrc <<EOF
  > [web]
  > push_ssl = false
  > allow_push = *
  > [hooks]
  > prepushkey = sh -c "printenv.py --line prepushkey 1"
  > [devel]
  > legacy.exchange=phases
  > EOF

#if bundle1
Bundle1 works because a) phases are updated as part of changegroup application
and b) client checks phases after the "unbundle" command. Since it sees no
phase changes are necessary, it doesn't send the "pushkey" command and the
prepushkey hook never has to fire.

  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  % serve errors

#endif

#if bundle2
Bundle2 sends a "pushkey" bundle2 part. This runs as part of the transaction
and fails the entire push.
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: prepushkey hook: HG_BUNDLE2=1
  remote: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_OLD=1
  remote: HG_PENDING=$TESTTMP/test
  remote: HG_PHASES_MOVED=1
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  remote: pushkey-abort: prepushkey hook exited with status 1
  remote: transaction abort!
  remote: rollback completed
  abort: updating ba677d0156c1 to public failed
  % serve errors
  [255]

#endif

Now remove the failing prepushkey hook.

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > prepushkey = sh -c "printenv.py --line prepushkey 0"
  > EOF

We don't need to test bundle1 because it succeeded above.

#if bundle2
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: prepushkey hook: HG_BUNDLE2=1
  remote: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_OLD=1
  remote: HG_PENDING=$TESTTMP/test
  remote: HG_PHASES_MOVED=1
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
#endif

  $ hg --config extensions.strip= strip -r 1:
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/ba677d0156c1-eea704d7-backup.hg

Now do a variant of the above, except on a non-publishing repository

  $ cat >> .hg/hgrc <<EOF
  > [phases]
  > publish = false
  > [hooks]
  > prepushkey = sh -c "printenv.py --line prepushkey 1"
  > EOF

#if bundle1
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: prepushkey hook: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_OLD=1
  remote: 
  remote: pushkey-abort: prepushkey hook exited with status 1
  updating ba677d0156c1 to public failed!
  % serve errors
#endif

#if bundle2
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: prepushkey hook: HG_BUNDLE2=1
  remote: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_OLD=1
  remote: HG_PENDING=$TESTTMP/test
  remote: HG_PHASES_MOVED=1
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  remote: pushkey-abort: prepushkey hook exited with status 1
  remote: transaction abort!
  remote: rollback completed
  abort: updating ba677d0156c1 to public failed
  % serve errors
  [255]
#endif

Make phases updates work

  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > prepushkey = sh -c "printenv.py --line prepushkey 0"
  > EOF

#if bundle1
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  no changes found
  remote: prepushkey hook: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_OLD=1
  remote: 
  % serve errors
  [1]
#endif

#if bundle2
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  remote: prepushkey hook: HG_BUNDLE2=1
  remote: HG_HOOKNAME=prepushkey
  remote: HG_HOOKTYPE=prepushkey
  remote: HG_KEY=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NAMESPACE=phases
  remote: HG_NEW=0
  remote: HG_NODE=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_NODE_LAST=ba677d0156c1196c1a699fa53f390dcfc3ce3872
  remote: HG_OLD=1
  remote: HG_PENDING=$TESTTMP/test
  remote: HG_PHASES_MOVED=1
  remote: HG_SOURCE=serve
  remote: HG_TXNID=TXN:$ID$
  remote: HG_TXNNAME=serve
  remote: HG_URL=remote:http:$LOCALIP: (glob)
  remote: 
  % serve errors
#endif

  $ hg --config extensions.strip= strip -r 1:
  saved backup bundle to $TESTTMP/test/.hg/strip-backup/ba677d0156c1-eea704d7-backup.hg

#if bundle2

  $ cat > .hg/hgrc <<EOF
  > [web]
  > push_ssl = false
  > allow_push = *
  > [experimental]
  > httppostargs=true
  > EOF
  $ req
  pushing to http://localhost:$HGPORT/
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files
  % serve errors

#endif

  $ cd ..

Pushing via hgwebdir works

  $ hg init hgwebdir
  $ cd hgwebdir
  $ echo 0 > a
  $ hg -q commit -A -m initial
  $ cd ..

  $ cat > web.conf << EOF
  > [paths]
  > / = *
  > [web]
  > push_ssl = false
  > allow_push = *
  > EOF

  $ hg serve --web-conf web.conf -p $HGPORT -d --pid-file hg.pid
  $ cat hg.pid >> $DAEMON_PIDS

  $ hg clone http://localhost:$HGPORT/hgwebdir hgwebdir-local
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  new changesets 98a3f8f02ba7
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd hgwebdir-local
  $ echo commit > a
  $ hg commit -m 'local commit'

  $ hg push
  pushing to http://localhost:$HGPORT/hgwebdir
  searching for changes
  remote: adding changesets
  remote: adding manifests
  remote: adding file changes
  remote: added 1 changesets with 1 changes to 1 files

  $ killdaemons.py

  $ cd ..