sapling/hgsql/tests/test-race-conditions.t

  $ . "$TESTDIR/library.sh"

# Populate the db with an initial commit

  $ initclient client
  $ cd client
  $ echo x > x
  $ hg commit -qAm x
  $ cd ..

  $ initserver master masterrepo
  $ cat >> master/.hg/hgrc <<EOF
  > [hgsql]
  > profileoutput=$TESTTMP/
  > EOF
  $ hg -R master log
  $ hg -R master pull -q client

  $ initserver master2 masterrepo
  $ hg -R master2 log --template '{rev}\n'
  0

# Verify that reads are not blocked by the repo syncing

  $ cd client
  $ echo y > y
  $ hg commit -qAm y
  $ hg push -q ssh://user@dummy/master
  $ cd ..

  $ cd master2
  $ printf "[hooks]\npresyncdb.sleep = sleep 5\n" >> .hg/hgrc
  $ hg log -l 2 --template "first:{rev}\n" --debug &
  $ sleep 3
  syncing with mysql
  running hook presyncdb.sleep: sleep 5
  $ hg log -l 2 --template "second:{rev}\n" --debug
  skipping database sync because another process is already syncing
  second:0
  $ sleep 5
  first:1
  first:0
  $ sed -i '/hooks/d' .hg/hgrc
  $ sed -i '/sleep/d' .hg/hgrc
  $ cd ..

# Verify simultaneous pushes to different heads succeeds

  $ printf "[hooks]\npre-changegroup.sleep = sleep 2\n" >> master/.hg/hgrc
  $ initclient client2
  $ hg pull -q -R client2 ssh://user@dummy/master

  $ cd client
  $ hg up -q 1
  $ echo z1 > z1
  $ hg commit -qAm z1
  $ cd ../client2
  $ hg up -q 1
  $ echo z2 > z2
  $ hg commit -qAm z2
  $ cd ..

  $ hg push -R client -q ssh://user@dummy/master &
  $ sleep 0.2
  $ hg push -R client2 -q -f ssh://user@dummy/master2
  $ hg log -R master -G --template '{rev} - {desc}\n'
  o  3 - z2
  |
  | o  2 - z1
  |/
  o  1 - y
  |
  o  0 - x
  
  $ sed -i '/hooks/d' master/.hg/hgrc
  $ sed -i '/sleep/d' master/.hg/hgrc