tests/test-hook.t

rust-performance: introduce FastHashMap type alias for HashMap

Rust's default hashing is slow, because it is meant for preventing collision
attacks.
For all of the current Rust code, we don't care about those attacks, because
if an person with bad intentions has write access to your repo, you have other
issues.

I've chosen to use the TwoXHash crate because it was made by a reputable member
of the Rust community and has very good benchmarks.

For now it does not seem to improve performance by much for the current code,
but it's something else to not worry about when benchmarking code: in a
previous experiment with copytracing in Rust, it accounted for more than 10%
of the time of the entire script.

Differential Revision: https://phab.mercurial-scm.org/D7116

commit hooks can see env vars
(and post-transaction one are run unlocked)


  $ cat > $TESTTMP/txnabort.checkargs.py <<EOF
  > from mercurial import pycompat
  > def showargs(ui, repo, hooktype, **kwargs):
  >     kwargs = pycompat.byteskwargs(kwargs)
  >     ui.write(b'%s Python hook: %s\n' % (hooktype,
  >                                         b','.join(sorted(kwargs))))
  > EOF

  $ hg init a
  $ cd a
  $ cat > .hg/hgrc <<EOF
  > [hooks]
  > commit = sh -c "HG_LOCAL= HG_TAG= printenv.py --line commit"
  > commit.b = sh -c "HG_LOCAL= HG_TAG= printenv.py --line commit.b"
  > precommit = sh -c  "HG_LOCAL= HG_NODE= HG_TAG= printenv.py --line precommit"
  > pretxncommit = sh -c "HG_LOCAL= HG_TAG= printenv.py --line pretxncommit"
  > pretxncommit.tip = hg -q tip
  > pre-identify = sh -c "printenv.py --line pre-identify 1"
  > pre-cat = sh -c "printenv.py --line pre-cat"
  > post-cat = sh -c "printenv.py --line post-cat"
  > pretxnopen = sh -c "HG_LOCAL= HG_TAG= printenv.py --line pretxnopen"
  > pretxnclose = sh -c "HG_LOCAL= HG_TAG= printenv.py --line pretxnclose"
  > txnclose = sh -c "HG_LOCAL= HG_TAG= printenv.py --line txnclose"
  > txnabort.0 = python:$TESTTMP/txnabort.checkargs.py:showargs
  > txnabort.1 = sh -c "HG_LOCAL= HG_TAG= printenv.py --line txnabort"
  > txnclose.checklock = sh -c "hg debuglock > /dev/null"
  > EOF
  $ echo a > a
  $ hg add a
  $ hg commit -m a
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=0000000000000000000000000000000000000000
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  HG_PARENT1=0000000000000000000000000000000000000000
  HG_PENDING=$TESTTMP/a
  
  0:cb9a9f314b8b
  pretxnclose hook: HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_PHASES_MOVED=1
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  txnclose hook: HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_PHASES_MOVED=1
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  commit hook: HG_HOOKNAME=commit
  HG_HOOKTYPE=commit
  HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  HG_PARENT1=0000000000000000000000000000000000000000
  
  commit.b hook: HG_HOOKNAME=commit.b
  HG_HOOKTYPE=commit
  HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  HG_PARENT1=0000000000000000000000000000000000000000
  

  $ hg clone . ../b
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd ../b

changegroup hooks can see env vars

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

pretxncommit and commit hooks can see both parents of merge

  $ cd ../a
  $ echo b >> a
  $ hg commit -m a1 -d "1 0"
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  HG_PENDING=$TESTTMP/a
  
  1:ab228980c14d
  pretxnclose hook: HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  txnclose hook: HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  commit hook: HG_HOOKNAME=commit
  HG_HOOKTYPE=commit
  HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  commit.b hook: HG_HOOKNAME=commit.b
  HG_HOOKTYPE=commit
  HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  $ hg update -C 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo b > b
  $ hg add b
  $ hg commit -m b -d '1 0'
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  HG_PENDING=$TESTTMP/a
  
  2:ee9deb46ab31
  pretxnclose hook: HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  created new head
  txnclose hook: HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  commit hook: HG_HOOKNAME=commit
  HG_HOOKTYPE=commit
  HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  commit.b hook: HG_HOOKNAME=commit.b
  HG_HOOKTYPE=commit
  HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  
  $ hg merge 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg commit -m merge -d '2 0'
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  HG_PENDING=$TESTTMP/a
  
  3:07f3376c1e65
  pretxnclose hook: HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  txnclose hook: HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  commit hook: HG_HOOKNAME=commit
  HG_HOOKTYPE=commit
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  
  commit.b hook: HG_HOOKNAME=commit.b
  HG_HOOKTYPE=commit
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  

test generic hooks

  $ hg id
  pre-identify hook: HG_ARGS=id
  HG_HOOKNAME=pre-identify
  HG_HOOKTYPE=pre-identify
  HG_OPTS={'bookmarks': None, 'branch': None, 'id': None, 'insecure': None, 'num': None, 'remotecmd': '', 'rev': '', 'ssh': '', 'tags': None, 'template': ''}
  HG_PATS=[]
  
  abort: pre-identify hook exited with status 1
  [255]
  $ hg cat b
  pre-cat hook: HG_ARGS=cat b
  HG_HOOKNAME=pre-cat
  HG_HOOKTYPE=pre-cat
  HG_OPTS={'decode': None, 'exclude': [], 'include': [], 'output': '', 'rev': '', 'template': ''}
  HG_PATS=['b']
  
  b
  post-cat hook: HG_ARGS=cat b
  HG_HOOKNAME=post-cat
  HG_HOOKTYPE=post-cat
  HG_OPTS={'decode': None, 'exclude': [], 'include': [], 'output': '', 'rev': '', 'template': ''}
  HG_PATS=['b']
  HG_RESULT=0
  

  $ cd ../b
  $ hg pull ../a
  pulling from ../a
  searching for changes
  prechangegroup hook: HG_HOOKNAME=prechangegroup
  HG_HOOKTYPE=prechangegroup
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 2 changes to 2 files
  new changesets ab228980c14d:07f3376c1e65
  changegroup hook: HG_HOOKNAME=changegroup
  HG_HOOKTYPE=changegroup
  HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd
  HG_NODE_LAST=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  incoming hook: HG_HOOKNAME=incoming
  HG_HOOKTYPE=incoming
  HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  incoming hook: HG_HOOKNAME=incoming
  HG_HOOKTYPE=incoming
  HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  incoming hook: HG_HOOKNAME=incoming
  HG_HOOKTYPE=incoming
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  (run 'hg update' to get a working copy)

tag hooks can see env vars

  $ cd ../a
  $ cat >> .hg/hgrc <<EOF
  > pretag = sh -c "printenv.py --line pretag"
  > tag = sh -c "HG_PARENT1= HG_PARENT2= printenv.py --line tag"
  > EOF
  $ hg tag -d '3 0' a
  pretag hook: HG_HOOKNAME=pretag
  HG_HOOKTYPE=pretag
  HG_LOCAL=0
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_TAG=a
  
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_PENDING=$TESTTMP/a
  
  4:539e4b31b6dc
  pretxnclose hook: HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  tag hook: HG_HOOKNAME=tag
  HG_HOOKTYPE=tag
  HG_LOCAL=0
  HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2
  HG_TAG=a
  
  txnclose hook: HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  commit hook: HG_HOOKNAME=commit
  HG_HOOKTYPE=commit
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
  
  commit.b hook: HG_HOOKNAME=commit.b
  HG_HOOKTYPE=commit
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PARENT1=07f3376c1e655977439df2a814e3cc14b27abac2
  
  $ hg tag -l la
  pretag hook: HG_HOOKNAME=pretag
  HG_HOOKTYPE=pretag
  HG_LOCAL=1
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=la
  
  tag hook: HG_HOOKNAME=tag
  HG_HOOKTYPE=tag
  HG_LOCAL=1
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=la
  

pretag hook can forbid tagging

  $ cat >> .hg/hgrc <<EOF
  > pretag.forbid = sh -c "printenv.py --line pretag.forbid 1"
  > EOF
  $ hg tag -d '4 0' fa
  pretag hook: HG_HOOKNAME=pretag
  HG_HOOKTYPE=pretag
  HG_LOCAL=0
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=fa
  
  pretag.forbid hook: HG_HOOKNAME=pretag.forbid
  HG_HOOKTYPE=pretag
  HG_LOCAL=0
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=fa
  
  abort: pretag.forbid hook exited with status 1
  [255]
  $ hg tag -l fla
  pretag hook: HG_HOOKNAME=pretag
  HG_HOOKTYPE=pretag
  HG_LOCAL=1
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=fla
  
  pretag.forbid hook: HG_HOOKNAME=pretag.forbid
  HG_HOOKTYPE=pretag
  HG_LOCAL=1
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_TAG=fla
  
  abort: pretag.forbid hook exited with status 1
  [255]

pretxncommit hook can see changeset, can roll back txn, changeset no
more there after

  $ cat >> .hg/hgrc <<EOF
  > pretxncommit.forbid0 = sh -c "hg tip -q"
  > pretxncommit.forbid1 = sh -c "printenv.py --line pretxncommit.forbid 1"
  > EOF
  $ echo z > z
  $ hg add z
  $ hg -q tip
  4:539e4b31b6dc
  $ hg commit -m 'fail' -d '4 0'
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  pretxncommit hook: HG_HOOKNAME=pretxncommit
  HG_HOOKTYPE=pretxncommit
  HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567
  HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PENDING=$TESTTMP/a
  
  5:6f611f8018c1
  5:6f611f8018c1
  pretxncommit.forbid hook: HG_HOOKNAME=pretxncommit.forbid1
  HG_HOOKTYPE=pretxncommit
  HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567
  HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PENDING=$TESTTMP/a
  
  transaction abort!
  txnabort Python hook: txnid,txnname
  txnabort hook: HG_HOOKNAME=txnabort.1
  HG_HOOKTYPE=txnabort
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=commit
  
  rollback completed
  abort: pretxncommit.forbid1 hook exited with status 1
  [255]
  $ hg -q tip
  4:539e4b31b6dc

(Check that no 'changelog.i.a' file were left behind)

  $ ls -1 .hg/store/
  00changelog.i
  00manifest.i
  data
  fncache (repofncache !)
  journal.phaseroots
  phaseroots
  undo
  undo.backup.fncache (repofncache !)
  undo.backupfiles
  undo.phaseroots


precommit hook can prevent commit

  $ cat >> .hg/hgrc <<EOF
  > precommit.forbid = sh -c "printenv.py --line precommit.forbid 1"
  > EOF
  $ hg commit -m 'fail' -d '4 0'
  precommit hook: HG_HOOKNAME=precommit
  HG_HOOKTYPE=precommit
  HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  
  precommit.forbid hook: HG_HOOKNAME=precommit.forbid
  HG_HOOKTYPE=precommit
  HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  
  abort: precommit.forbid hook exited with status 1
  [255]
  $ hg -q tip
  4:539e4b31b6dc

preupdate hook can prevent update

  $ cat >> .hg/hgrc <<EOF
  > preupdate = sh -c "printenv.py --line preupdate"
  > EOF
  $ hg update 1
  preupdate hook: HG_HOOKNAME=preupdate
  HG_HOOKTYPE=preupdate
  HG_PARENT1=ab228980c14d
  
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

update hook

  $ cat >> .hg/hgrc <<EOF
  > update = sh -c "printenv.py --line update"
  > EOF
  $ hg update
  preupdate hook: HG_HOOKNAME=preupdate
  HG_HOOKTYPE=preupdate
  HG_PARENT1=539e4b31b6dc
  
  update hook: HG_ERROR=0
  HG_HOOKNAME=update
  HG_HOOKTYPE=update
  HG_PARENT1=539e4b31b6dc
  
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

pushkey hook

  $ cat >> .hg/hgrc <<EOF
  > pushkey = sh -c "printenv.py --line pushkey"
  > EOF
  $ cd ../b
  $ hg bookmark -r null foo
  $ hg push -B foo ../a
  pushing to ../a
  searching for changes
  no changes found
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  
  pretxnclose hook: HG_BOOKMARK_MOVED=1
  HG_BUNDLE2=1
  HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_SOURCE=push
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  HG_URL=file:$TESTTMP/a
  
  pushkey hook: HG_BUNDLE2=1
  HG_HOOKNAME=pushkey
  HG_HOOKTYPE=pushkey
  HG_KEY=foo
  HG_NAMESPACE=bookmarks
  HG_NEW=0000000000000000000000000000000000000000
  HG_PUSHKEYCOMPAT=1
  HG_SOURCE=push
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  HG_URL=file:$TESTTMP/a
  
  txnclose hook: HG_BOOKMARK_MOVED=1
  HG_BUNDLE2=1
  HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_SOURCE=push
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  HG_URL=file:$TESTTMP/a
  
  exporting bookmark foo
  [1]
  $ cd ../a

listkeys hook

  $ cat >> .hg/hgrc <<EOF
  > listkeys = sh -c "printenv.py --line listkeys"
  > EOF
  $ hg bookmark -r null bar
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  pretxnclose hook: HG_BOOKMARK_MOVED=1
  HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  txnclose hook: HG_BOOKMARK_MOVED=1
  HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  $ cd ../b
  $ hg pull -B bar ../a
  pulling from ../a
  listkeys hook: HG_HOOKNAME=listkeys
  HG_HOOKTYPE=listkeys
  HG_NAMESPACE=bookmarks
  HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
  
  no changes found
  adding remote bookmark bar
  $ cd ../a

test that prepushkey can prevent incoming keys

  $ cat >> .hg/hgrc <<EOF
  > prepushkey = sh -c "printenv.py --line prepushkey.forbid 1"
  > EOF
  $ cd ../b
  $ hg bookmark -r null baz
  $ hg push -B baz ../a
  pushing to ../a
  searching for changes
  listkeys hook: HG_HOOKNAME=listkeys
  HG_HOOKTYPE=listkeys
  HG_NAMESPACE=phases
  HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
  
  listkeys hook: HG_HOOKNAME=listkeys
  HG_HOOKTYPE=listkeys
  HG_NAMESPACE=bookmarks
  HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
  
  no changes found
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  
  prepushkey.forbid hook: HG_BUNDLE2=1
  HG_HOOKNAME=prepushkey
  HG_HOOKTYPE=prepushkey
  HG_KEY=baz
  HG_NAMESPACE=bookmarks
  HG_NEW=0000000000000000000000000000000000000000
  HG_PUSHKEYCOMPAT=1
  HG_SOURCE=push
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=push
  HG_URL=file:$TESTTMP/a
  
  abort: prepushkey hook exited with status 1
  [255]
  $ cd ../a

test that prelistkeys can prevent listing keys

  $ cat >> .hg/hgrc <<EOF
  > prelistkeys = sh -c "printenv.py --line prelistkeys.forbid 1"
  > EOF
  $ hg bookmark -r null quux
  pretxnopen hook: HG_HOOKNAME=pretxnopen
  HG_HOOKTYPE=pretxnopen
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  pretxnclose hook: HG_BOOKMARK_MOVED=1
  HG_HOOKNAME=pretxnclose
  HG_HOOKTYPE=pretxnclose
  HG_PENDING=$TESTTMP/a
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  txnclose hook: HG_BOOKMARK_MOVED=1
  HG_HOOKNAME=txnclose
  HG_HOOKTYPE=txnclose
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=bookmark
  
  $ cd ../b
  $ hg pull -B quux ../a
  pulling from ../a
  prelistkeys.forbid hook: HG_HOOKNAME=prelistkeys
  HG_HOOKTYPE=prelistkeys
  HG_NAMESPACE=bookmarks
  
  abort: prelistkeys hook exited with status 1
  [255]
  $ cd ../a
  $ rm .hg/hgrc

prechangegroup hook can prevent incoming changes

  $ cd ../b
  $ hg -q tip
  3:07f3376c1e65
  $ cat > .hg/hgrc <<EOF
  > [hooks]
  > prechangegroup.forbid = sh -c "printenv.py --line prechangegroup.forbid 1"
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  prechangegroup.forbid hook: HG_HOOKNAME=prechangegroup.forbid
  HG_HOOKTYPE=prechangegroup
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  abort: prechangegroup.forbid hook exited with status 1
  [255]

pretxnchangegroup hook can see incoming changes, can roll back txn,
incoming changes no longer there after

  $ cat > .hg/hgrc <<EOF
  > [hooks]
  > pretxnchangegroup.forbid0 = hg tip -q
  > pretxnchangegroup.forbid1 = sh -c "printenv.py --line pretxnchangegroup.forbid 1"
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  4:539e4b31b6dc
  pretxnchangegroup.forbid hook: HG_HOOKNAME=pretxnchangegroup.forbid1
  HG_HOOKTYPE=pretxnchangegroup
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_NODE_LAST=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_PENDING=$TESTTMP/b
  HG_SOURCE=pull
  HG_TXNID=TXN:$ID$
  HG_TXNNAME=pull
  file:/*/$TESTTMP/a (glob)
  HG_URL=file:$TESTTMP/a
  
  transaction abort!
  rollback completed
  abort: pretxnchangegroup.forbid1 hook exited with status 1
  [255]
  $ hg -q tip
  3:07f3376c1e65

outgoing hooks can see env vars

  $ rm .hg/hgrc
  $ cat > ../a/.hg/hgrc <<EOF
  > [hooks]
  > preoutgoing = sh -c "printenv.py --line preoutgoing"
  > outgoing = sh -c "printenv.py --line outgoing"
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  preoutgoing hook: HG_HOOKNAME=preoutgoing
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=pull
  
  outgoing hook: HG_HOOKNAME=outgoing
  HG_HOOKTYPE=outgoing
  HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  HG_SOURCE=pull
  
  adding changesets
  adding manifests
  adding file changes
  adding remote bookmark quux
  added 1 changesets with 1 changes to 1 files
  new changesets 539e4b31b6dc
  (run 'hg update' to get a working copy)
  $ hg rollback
  repository tip rolled back to revision 3 (undo pull)

preoutgoing hook can prevent outgoing changes

  $ cat >> ../a/.hg/hgrc <<EOF
  > preoutgoing.forbid = sh -c "printenv.py --line preoutgoing.forbid 1"
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  preoutgoing hook: HG_HOOKNAME=preoutgoing
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=pull
  
  preoutgoing.forbid hook: HG_HOOKNAME=preoutgoing.forbid
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=pull
  
  abort: preoutgoing.forbid hook exited with status 1
  [255]

outgoing hooks work for local clones

  $ cd ..
  $ cat > a/.hg/hgrc <<EOF
  > [hooks]
  > preoutgoing = sh -c "printenv.py --line preoutgoing"
  > outgoing = sh -c "printenv.py --line outgoing"
  > EOF
  $ hg clone a c
  preoutgoing hook: HG_HOOKNAME=preoutgoing
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=clone
  
  outgoing hook: HG_HOOKNAME=outgoing
  HG_HOOKTYPE=outgoing
  HG_NODE=0000000000000000000000000000000000000000
  HG_SOURCE=clone
  
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ rm -rf c

preoutgoing hook can prevent outgoing changes for local clones

  $ cat >> a/.hg/hgrc <<EOF
  > preoutgoing.forbid = sh -c "printenv.py --line preoutgoing.forbid 1"
  > EOF
  $ hg clone a zzz
  preoutgoing hook: HG_HOOKNAME=preoutgoing
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=clone
  
  preoutgoing.forbid hook: HG_HOOKNAME=preoutgoing.forbid
  HG_HOOKTYPE=preoutgoing
  HG_SOURCE=clone
  
  abort: preoutgoing.forbid hook exited with status 1
  [255]

  $ cd "$TESTTMP/b"

  $ cat > hooktests.py <<EOF
  > from __future__ import print_function
  > from mercurial import (
  >     error,
  >     pycompat,
  > )
  > 
  > uncallable = 0
  > 
  > def printargs(ui, args):
  >     a = list(pycompat.byteskwargs(args).items())
  >     a.sort()
  >     ui.write(b'hook args:\n')
  >     for k, v in a:
  >        ui.write(b'  %s %s\n' % (k, v))
  > 
  > def passhook(ui, repo, **args):
  >     printargs(ui, args)
  > 
  > def failhook(ui, repo, **args):
  >     printargs(ui, args)
  >     return True
  > 
  > class LocalException(Exception):
  >     pass
  > 
  > def raisehook(**args):
  >     raise LocalException('exception from hook')
  > 
  > def aborthook(**args):
  >     raise error.Abort(b'raise abort from hook')
  > 
  > def brokenhook(**args):
  >     return 1 + {}
  > 
  > def verbosehook(ui, **args):
  >     ui.note(b'verbose output from hook\n')
  > 
  > def printtags(ui, repo, **args):
  >     ui.write(b'[%s]\n' % b', '.join(sorted(repo.tags())))
  > 
  > class container(object):
  >     unreachable = 1
  > EOF

  $ cat > syntaxerror.py << NO_CHECK_EOF
  > (foo
  > NO_CHECK_EOF

test python hooks

#if windows
  $ PYTHONPATH="$TESTTMP/b;$PYTHONPATH"
#else
  $ PYTHONPATH="$TESTTMP/b:$PYTHONPATH"
#endif
  $ export PYTHONPATH

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.broken = python:hooktests.brokenhook' >> ../a/.hg/hgrc
  $ hg pull ../a 2>&1 | grep 'raised an exception'
  error: preoutgoing.broken hook raised an exception: unsupported operand type(s) for +: 'int' and 'dict'

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.raise = python:hooktests.raisehook' >> ../a/.hg/hgrc
  $ hg pull ../a 2>&1 | grep 'raised an exception'
  error: preoutgoing.raise hook raised an exception: exception from hook

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.abort = python:hooktests.aborthook' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  error: preoutgoing.abort hook failed: raise abort from hook
  abort: raise abort from hook
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.fail = python:hooktests.failhook' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  hook args:
    hooktype preoutgoing
    source pull
  abort: preoutgoing.fail hook failed
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.uncallable = python:hooktests.uncallable' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.uncallable hook is invalid: "hooktests.uncallable" is not callable
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.nohook = python:hooktests.nohook' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.nohook hook is invalid: "hooktests.nohook" is not defined
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.nomodule = python:nomodule' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.nomodule hook is invalid: "nomodule" not in a module
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.badmodule = python:nomodule.nowhere' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.badmodule hook is invalid: import of "nomodule" failed
  (run with --traceback for stack trace)
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.unreachable = python:hooktests.container.unreachable' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.unreachable hook is invalid: import of "hooktests.container" failed
  (run with --traceback for stack trace)
  [255]

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.syntaxerror = python:syntaxerror.syntaxerror' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
  (run with --traceback for stack trace)
  [255]

  $ hg pull ../a --traceback 2>&1 | egrep 'pulling|searching|^exception|Traceback|SyntaxError|ImportError|ModuleNotFoundError|HookLoadError|abort'
  pulling from ../a
  searching for changes
  exception from first failed import attempt:
  Traceback (most recent call last):
  SyntaxError: * (glob)
  exception from second failed import attempt:
  Traceback (most recent call last): (py3 !)
  SyntaxError: * (glob) (py3 !)
  Traceback (most recent call last):
  ImportError: No module named hgext_syntaxerror (no-py3 !)
  ImportError: No module named 'hgext_syntaxerror' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'hgext_syntaxerror' (py36 !)
  Traceback (most recent call last):
  SyntaxError: * (glob) (py3 !)
  Traceback (most recent call last): (py3 !)
  ImportError: No module named 'hgext_syntaxerror' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'hgext_syntaxerror' (py36 !)
  Traceback (most recent call last): (py3 !)
  HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed (no-py3 !)
  mercurial.error.HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed (py3 !)
  abort: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed

  $ echo '[hooks]' > ../a/.hg/hgrc
  $ echo 'preoutgoing.pass = python:hooktests.passhook' >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  hook args:
    hooktype preoutgoing
    source pull
  adding changesets
  adding manifests
  adding file changes
  adding remote bookmark quux
  added 1 changesets with 1 changes to 1 files
  new changesets 539e4b31b6dc
  (run 'hg update' to get a working copy)

post- python hooks that fail to *run* don't cause an abort
  $ rm ../a/.hg/hgrc
  $ echo '[hooks]' > .hg/hgrc
  $ echo 'post-pull.broken = python:hooktests.brokenhook' >> .hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  no changes found
  error: post-pull.broken hook raised an exception: unsupported operand type(s) for +: 'int' and 'dict'
  (run with --traceback for stack trace)

but post- python hooks that fail to *load* do
  $ echo '[hooks]' > .hg/hgrc
  $ echo 'post-pull.nomodule = python:nomodule' >> .hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  no changes found
  abort: post-pull.nomodule hook is invalid: "nomodule" not in a module
  [255]

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'post-pull.badmodule = python:nomodule.nowhere' >> .hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  no changes found
  abort: post-pull.badmodule hook is invalid: import of "nomodule" failed
  (run with --traceback for stack trace)
  [255]

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'post-pull.nohook = python:hooktests.nohook' >> .hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  no changes found
  abort: post-pull.nohook hook is invalid: "hooktests.nohook" is not defined
  [255]

make sure --traceback works

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'commit.abort = python:hooktests.aborthook' >> .hg/hgrc

  $ echo aa > a
  $ hg --traceback commit -d '0 0' -ma 2>&1 | grep '^Traceback'
  Traceback (most recent call last):

  $ cd ..
  $ hg init c
  $ cd c

  $ cat > hookext.py <<EOF
  > def autohook(ui, **args):
  >     ui.write(b'Automatically installed hook\n')
  > 
  > def reposetup(ui, repo):
  >     repo.ui.setconfig(b"hooks", b"commit.auto", autohook)
  > EOF
  $ echo '[extensions]' >> .hg/hgrc
  $ echo 'hookext = hookext.py' >> .hg/hgrc

  $ touch foo
  $ hg add foo
  $ hg ci -d '0 0' -m 'add foo'
  Automatically installed hook
  $ echo >> foo
  $ hg ci --debug -d '0 0' -m 'change foo'
  committing files:
  foo
  committing manifest
  committing changelog
  updating the branch cache
  committed changeset 1:52998019f6252a2b893452765fcb0a47351a5708
  calling hook commit.auto: hgext_hookext.autohook
  Automatically installed hook

  $ hg showconfig hooks
  hooks.commit.auto=<function autohook at *> (glob)

test python hook configured with python:[file]:[hook] syntax

  $ cd ..
  $ mkdir d
  $ cd d
  $ hg init repo
  $ mkdir hooks

  $ cd hooks
  $ cat > testhooks.py <<EOF
  > def testhook(ui, **args):
  >     ui.write(b'hook works\n')
  > EOF
  $ echo '[hooks]' > ../repo/.hg/hgrc
  $ echo "pre-commit.test = python:`pwd`/testhooks.py:testhook" >> ../repo/.hg/hgrc

  $ cd ../repo
  $ hg commit -d '0 0'
  hook works
  nothing changed
  [1]

  $ echo '[hooks]' > .hg/hgrc
  $ echo "update.ne = python:`pwd`/nonexistent.py:testhook" >> .hg/hgrc
  $ echo "pre-identify.npmd = python:`pwd`/:no_python_module_dir" >> .hg/hgrc

  $ hg up null
  loading update.ne hook failed:
  abort: $ENOENT$: '$TESTTMP/d/repo/nonexistent.py'
  [255]

  $ hg id
  loading pre-identify.npmd hook failed:
  abort: No module named repo! (no-py3 !)
  abort: No module named 'repo'! (py3 !)
  [255]

  $ cd ../../b

make sure --traceback works on hook import failure

  $ cat > importfail.py <<EOF
  > import somebogusmodule
  > # dereference something in the module to force demandimport to load it
  > somebogusmodule.whatever
  > EOF

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'precommit.importfail = python:importfail.whatever' >> .hg/hgrc

  $ echo a >> a
  $ hg --traceback commit -ma 2>&1 | egrep '^exception|ImportError|ModuleNotFoundError|Traceback|HookLoadError|abort'
  exception from first failed import attempt:
  Traceback (most recent call last):
  ImportError: No module named somebogusmodule (no-py3 !)
  ImportError: No module named 'somebogusmodule' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'somebogusmodule' (py36 !)
  exception from second failed import attempt:
  Traceback (most recent call last): (py3 !)
  ImportError: No module named 'somebogusmodule' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'somebogusmodule' (py36 !)
  Traceback (most recent call last): (py3 !)
  ImportError: No module named 'hgext_importfail' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'hgext_importfail' (py36 !)
  Traceback (most recent call last): (py3 !)
  ImportError: No module named 'somebogusmodule' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'somebogusmodule' (py36 !)
  Traceback (most recent call last):
  ImportError: No module named hgext_importfail (no-py3 !)
  ImportError: No module named 'hgext_importfail' (py3 no-py36 !)
  ModuleNotFoundError: No module named 'hgext_importfail' (py36 !)
  Traceback (most recent call last):
  HookLoadError: precommit.importfail hook is invalid: import of "importfail" failed (no-py3 !)
  mercurial.error.HookLoadError: precommit.importfail hook is invalid: import of "importfail" failed (py3 !)
  abort: precommit.importfail hook is invalid: import of "importfail" failed

Issue1827: Hooks Update & Commit not completely post operation

commit and update hooks should run after command completion.  The largefiles
use demonstrates a recursive wlock, showing the hook doesn't run until the
final release (and dirstate flush).

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'commit = hg id' >> .hg/hgrc
  $ echo 'update = hg id' >> .hg/hgrc
  $ echo bb > a
  $ hg ci -ma
  223eafe2750c tip
  $ hg up 0 --config extensions.largefiles=
  The fsmonitor extension is incompatible with the largefiles extension and has been disabled. (fsmonitor !)
  cb9a9f314b8b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

make sure --verbose (and --quiet/--debug etc.) are propagated to the local ui
that is passed to pre/post hooks

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'pre-identify = python:hooktests.verbosehook' >> .hg/hgrc
  $ hg id
  cb9a9f314b8b
  $ hg id --verbose
  calling hook pre-identify: hooktests.verbosehook
  verbose output from hook
  cb9a9f314b8b

Ensure hooks can be prioritized

  $ echo '[hooks]' > .hg/hgrc
  $ echo 'pre-identify.a = python:hooktests.verbosehook' >> .hg/hgrc
  $ echo 'pre-identify.b = python:hooktests.verbosehook' >> .hg/hgrc
  $ echo 'priority.pre-identify.b = 1' >> .hg/hgrc
  $ echo 'pre-identify.c = python:hooktests.verbosehook' >> .hg/hgrc
  $ hg id --verbose
  calling hook pre-identify.b: hooktests.verbosehook
  verbose output from hook
  calling hook pre-identify.a: hooktests.verbosehook
  verbose output from hook
  calling hook pre-identify.c: hooktests.verbosehook
  verbose output from hook
  cb9a9f314b8b

new tags must be visible in pretxncommit (issue3210)

  $ echo 'pretxncommit.printtags = python:hooktests.printtags' >> .hg/hgrc
  $ hg tag -f foo
  [a, foo, tip]

post-init hooks must not crash (issue4983)
This also creates the `to` repo for the next test block.

  $ cd ..
  $ cat << EOF >> hgrc-with-post-init-hook
  > [hooks]
  > post-init = sh -c "printenv.py --line post-init"
  > EOF
  $ HGRCPATH=hgrc-with-post-init-hook hg init to
  post-init hook: HG_ARGS=init to
  HG_HOOKNAME=post-init
  HG_HOOKTYPE=post-init
  HG_OPTS={'insecure': None, 'remotecmd': '', 'ssh': ''}
  HG_PATS=['to']
  HG_RESULT=0
  

new commits must be visible in pretxnchangegroup (issue3428)

  $ echo '[hooks]' >> to/.hg/hgrc
  $ echo 'prechangegroup = hg --traceback tip' >> to/.hg/hgrc
  $ echo 'pretxnchangegroup = hg --traceback tip' >> to/.hg/hgrc
  $ echo a >> to/a
  $ hg --cwd to ci -Ama
  adding a
  $ hg clone to from
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo aa >> from/a
  $ hg --cwd from ci -mb
  $ hg --cwd from push
  pushing to $TESTTMP/to
  searching for changes
  changeset:   0:cb9a9f314b8b
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  
  adding changesets
  adding manifests
  adding file changes
  changeset:   1:9836a07b9b9d
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  
  added 1 changesets with 1 changes to 1 files

pretxnclose hook failure should abort the transaction

  $ hg init txnfailure
  $ cd txnfailure
  $ touch a && hg commit -Aqm a
  $ cat >> .hg/hgrc <<EOF
  > [hooks]
  > pretxnclose.error = exit 1
  > EOF
  $ hg strip -r 0 --config extensions.strip=
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  saved backup bundle to * (glob)
  transaction abort!
  rollback completed
  strip failed, backup bundle stored in * (glob)
  abort: pretxnclose.error hook exited with status 1
  [255]
  $ hg recover
  no interrupted transaction available
  [1]
  $ cd ..

check whether HG_PENDING makes pending changes only in related
repositories visible to an external hook.

(emulate a transaction running concurrently by copied
.hg/store/00changelog.i.a in subsequent test)

  $ cat > $TESTTMP/savepending.sh <<EOF
  > cp .hg/store/00changelog.i.a  .hg/store/00changelog.i.a.saved
  > exit 1 # to avoid adding new revision for subsequent tests
  > EOF
  $ cd a
  $ hg tip -q
  4:539e4b31b6dc
  $ hg --config hooks.pretxnclose="sh $TESTTMP/savepending.sh" commit -m "invisible"
  transaction abort!
  rollback completed
  abort: pretxnclose hook exited with status 1
  [255]
  $ cp .hg/store/00changelog.i.a.saved .hg/store/00changelog.i.a

(check (in)visibility of new changeset while transaction running in
repo)

  $ cat > $TESTTMP/checkpending.sh <<EOF
  > echo '@a'
  > hg -R "$TESTTMP/a" tip -q
  > echo '@a/nested'
  > hg -R "$TESTTMP/a/nested" tip -q
  > exit 1 # to avoid adding new revision for subsequent tests
  > EOF
  $ hg init nested
  $ cd nested
  $ echo a > a
  $ hg add a
  $ hg --config hooks.pretxnclose="sh $TESTTMP/checkpending.sh" commit -m '#0'
  @a
  4:539e4b31b6dc
  @a/nested
  0:bf5e395ced2c
  transaction abort!
  rollback completed
  abort: pretxnclose hook exited with status 1
  [255]

Hook from untrusted hgrc are reported as failure
================================================

  $ cat << EOF > $TESTTMP/untrusted.py
  > from mercurial import scmutil, util
  > def uisetup(ui):
  >     class untrustedui(ui.__class__):
  >         def _trusted(self, fp, f):
  >             if util.normpath(fp.name).endswith(b'untrusted/.hg/hgrc'):
  >                 return False
  >             return super(untrustedui, self)._trusted(fp, f)
  >     ui.__class__ = untrustedui
  > EOF
  $ cat << EOF >> $HGRCPATH
  > [extensions]
  > untrusted=$TESTTMP/untrusted.py
  > EOF
  $ hg init untrusted
  $ cd untrusted

Non-blocking hook
-----------------

  $ cat << EOF >> .hg/hgrc
  > [hooks]
  > txnclose.testing=echo txnclose hook called
  > EOF
  $ touch a && hg commit -Aqm a
  warning: untrusted hook txnclose.testing not executed
  $ hg log
  changeset:   0:3903775176ed
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a
  

Non-blocking hook
-----------------

  $ cat << EOF >> .hg/hgrc
  > [hooks]
  > pretxnclose.testing=echo pre-txnclose hook called
  > EOF
  $ touch b && hg commit -Aqm a
  transaction abort!
  rollback completed
  abort: untrusted hook pretxnclose.testing not executed
  (see 'hg help config.trusted')
  [255]
  $ hg log
  changeset:   0:3903775176ed
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     a