view tests/test-hook.t @ 29375:fcaf20175b1b

demandimport: delay loading for "from a import b" with absolute_import

Before this patch, "from a import b" doesn't delay loading module "b",
if absolute_import is enabled, even though "from . import b" does.

For example:

  - it is assumed that extension X has "from P import M" for module M
    under package P with absolute_import feature

  - if importing module M is already delayed before loading extension
    X, loading module M in extension X is delayed until actually
    referring

    util, cmdutil, scmutil or so of Mercurial itself should be
    imported by "from . import M" style before loading extension X

  - otherwise, module M is loaded immediately at loading extension X,
    even if extension X itself isn't used at that "hg" command invocation

    Some minor modules (e.g. filemerge or so) of Mercurial itself
    aren't imported by "from . import M" style before loading
    extension X. And of course, external libraries aren't, too.

This might cause startup performance problem of hg command, because
many bundled extensions already enable absolute_import feature.

To delay loading module for "from a import b" with absolute_import
feature, this patch does below in "from a (or .a) import b" with
absolute_import case:

  1. import root module of "name" by system built-in __import__
     (referred as _origimport)

  2. recurse down the module chain for hierarchical "name"

     This logic can be shared with non absolute_import
     case. Therefore, this patch also centralizes it into chainmodules().

  3. and fall through to process elements in "fromlist" for the leaf
     module of "name"

     Processing elements in "fromlist" is executed in the code path
     after "if _pypy: .... else: ..." clause. Therefore, this patch
     replaces "if _pypy:" with "elif _pypy:" to share it.

At 4f1144c3c72b introducing original "work around" for "from a import
b" case, elements in "fromlist" were imported with "level=level". But
"level" might be grater than 1 (e.g. level=2 in "from .. import b"
case) at demandimport() invocation, and importing direct sub-module in
"fromlist" with level grater than 1 causes unexpected result.

IMHO, this seems main reason of "errors for unknown reason" described
in 4f1144c3c72b, and we don't have to worry about it, because this
issue was already fixed by 78d05778907b.

This is reason why this patch removes "errors for unknown reasons"
comment.

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

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > # drop me once bundle2 is the default,
  > # added to get test change early.
  > bundle2-exp = True
  > EOF

  $ cat > $TESTTMP/txnabort.checkargs.py <<EOF
  > def showargs(ui, repo, hooktype, **kwargs):
  >     ui.write('%s python hook: %s\n' % (hooktype, ','.join(sorted(kwargs))))
  > EOF

  $ hg init a
  $ cd a
  $ cat > .hg/hgrc <<EOF
  > [hooks]
  > commit = sh -c "HG_LOCAL= HG_TAG= printenv.py commit"
  > commit.b = sh -c "HG_LOCAL= HG_TAG= printenv.py commit.b"
  > precommit = sh -c  "HG_LOCAL= HG_NODE= HG_TAG= printenv.py precommit"
  > pretxncommit = sh -c "HG_LOCAL= HG_TAG= printenv.py pretxncommit"
  > pretxncommit.tip = hg -q tip
  > pre-identify = printenv.py pre-identify 1
  > pre-cat = printenv.py pre-cat
  > post-cat = printenv.py post-cat
  > pretxnopen = sh -c "HG_LOCAL= HG_TAG= printenv.py pretxnopen"
  > pretxnclose = sh -c "HG_LOCAL= HG_TAG= printenv.py pretxnclose"
  > txnclose = sh -c "HG_LOCAL= HG_TAG= printenv.py txnclose"
  > txnabort.0 = python:$TESTTMP/txnabort.checkargs.py:showargs
  > txnabort.1 = sh -c "HG_LOCAL= HG_TAG= printenv.py txnabort"
  > txnclose.checklock = sh -c "hg debuglock > /dev/null"
  > EOF
  $ echo a > a
  $ hg add a
  $ hg commit -m a
  precommit hook: HG_PARENT1=0000000000000000000000000000000000000000
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  pretxncommit hook: HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PARENT1=0000000000000000000000000000000000000000 HG_PENDING=$TESTTMP/a
  0:cb9a9f314b8b
  pretxnclose hook: HG_PENDING=$TESTTMP/a HG_PHASES_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  txnclose hook: HG_PHASES_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  commit hook: HG_NODE=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PARENT1=0000000000000000000000000000000000000000
  commit.b hook: 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 = printenv.py prechangegroup
  > changegroup = printenv.py changegroup
  > incoming = printenv.py 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_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  pretxncommit hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PENDING=$TESTTMP/a
  1:ab228980c14d
  pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  commit hook: HG_NODE=ab228980c14deea8b9555d91c9581127383e40fd HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  commit.b hook: 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_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  pretxncommit hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b HG_PENDING=$TESTTMP/a
  2:ee9deb46ab31
  pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  created new head
  txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  commit hook: HG_NODE=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT1=cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b
  commit.b hook: 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_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  pretxncommit hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd HG_PENDING=$TESTTMP/a
  3:07f3376c1e65
  pretxnclose hook: HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  txnclose hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  commit hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd
  commit.b hook: HG_NODE=07f3376c1e655977439df2a814e3cc14b27abac2 HG_PARENT1=ee9deb46ab31e4cc3310f3cf0c3d668e4d8fffc2 HG_PARENT2=ab228980c14deea8b9555d91c9581127383e40fd

test generic hooks

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

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

tag hooks can see env vars

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

pretag hook can forbid tagging

  $ echo "pretag.forbid = printenv.py pretag.forbid 1" >> .hg/hgrc
  $ hg tag -d '4 0' fa
  pretag hook: HG_LOCAL=0 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fa
  pretag.forbid hook: 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_LOCAL=1 HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_TAG=fla
  pretag.forbid hook: 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

  $ echo "pretxncommit.forbid0 = hg tip -q" >> .hg/hgrc
  $ echo "pretxncommit.forbid1 = printenv.py pretxncommit.forbid 1" >> .hg/hgrc
  $ echo z > z
  $ hg add z
  $ hg -q tip
  4:539e4b31b6dc
  $ hg commit -m 'fail' -d '4 0'
  precommit hook: HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  pretxncommit hook: HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567 HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/a
  5:6f611f8018c1
  5:6f611f8018c1
  pretxncommit.forbid hook: HG_NODE=6f611f8018c10e827fee6bd2bc807f937e761567 HG_PARENT1=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/a
  transaction abort!
  txnabort python hook: txnid,txnname
  txnabort hook: HG_TXNID=TXN:* HG_TXNNAME=commit (glob)
  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
  journal.phaseroots
  phaseroots
  undo
  undo.backup.fncache
  undo.backupfiles
  undo.phaseroots


precommit hook can prevent commit

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

preupdate hook can prevent update

  $ echo "preupdate = printenv.py preupdate" >> .hg/hgrc
  $ hg update 1
  preupdate hook: HG_PARENT1=ab228980c14d
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved

update hook

  $ echo "update = printenv.py update" >> .hg/hgrc
  $ hg update
  preupdate hook: HG_PARENT1=539e4b31b6dc
  update hook: HG_ERROR=0 HG_PARENT1=539e4b31b6dc
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

pushkey hook

  $ echo "pushkey = printenv.py pushkey" >> .hg/hgrc
  $ cd ../b
  $ hg bookmark -r null foo
  $ hg push -B foo ../a
  pushing to ../a
  searching for changes
  no changes found
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=push (glob)
  pretxnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2=1 HG_PENDING=$TESTTMP/a HG_SOURCE=push HG_TXNID=TXN:* HG_TXNNAME=push HG_URL=push (glob)
  pushkey hook: HG_KEY=foo HG_NAMESPACE=bookmarks HG_NEW=0000000000000000000000000000000000000000 HG_RET=1
  txnclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2=1 HG_SOURCE=push HG_TXNID=TXN:* HG_TXNNAME=push HG_URL=push (glob)
  exporting bookmark foo
  [1]
  $ cd ../a

listkeys hook

  $ echo "listkeys = printenv.py listkeys" >> .hg/hgrc
  $ hg bookmark -r null bar
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  pretxnclose hook: HG_BOOKMARK_MOVED=1 HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  txnclose hook: HG_BOOKMARK_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  $ cd ../b
  $ hg pull -B bar ../a
  pulling from ../a
  listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
  no changes found
  listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
  adding remote bookmark bar
  $ cd ../a

test that prepushkey can prevent incoming keys

  $ echo "prepushkey = printenv.py prepushkey.forbid 1" >> .hg/hgrc
  $ cd ../b
  $ hg bookmark -r null baz
  $ hg push -B baz ../a
  pushing to ../a
  searching for changes
  listkeys hook: HG_NAMESPACE=phases HG_VALUES={'cb9a9f314b8b07ba71012fcdbc544b5a4d82ff5b': '1', 'publishing': 'True'}
  listkeys hook: HG_NAMESPACE=bookmarks HG_VALUES={'bar': '0000000000000000000000000000000000000000', 'foo': '0000000000000000000000000000000000000000'}
  no changes found
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=push (glob)
  prepushkey.forbid hook: HG_BUNDLE2=1 HG_KEY=baz HG_NAMESPACE=bookmarks HG_NEW=0000000000000000000000000000000000000000 HG_SOURCE=push HG_TXNID=TXN:* HG_URL=push (glob)
  pushkey-abort: prepushkey hook exited with status 1
  abort: exporting bookmark baz failed!
  [255]
  $ cd ../a

test that prelistkeys can prevent listing keys

  $ echo "prelistkeys = printenv.py prelistkeys.forbid 1" >> .hg/hgrc
  $ hg bookmark -r null quux
  pretxnopen hook: HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  pretxnclose hook: HG_BOOKMARK_MOVED=1 HG_PENDING=$TESTTMP/a HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  txnclose hook: HG_BOOKMARK_MOVED=1 HG_TXNID=TXN:* HG_TXNNAME=bookmark (glob)
  $ cd ../b
  $ hg pull -B quux ../a
  pulling from ../a
  prelistkeys.forbid hook: 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 = printenv.py prechangegroup.forbid 1
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  prechangegroup.forbid hook: HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
  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 = printenv.py pretxnchangegroup.forbid 1
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  4:539e4b31b6dc
  pretxnchangegroup.forbid hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_NODE_LAST=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_PENDING=$TESTTMP/b HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=file:$TESTTMP/a (glob)
  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 = printenv.py preoutgoing
  > outgoing = printenv.py outgoing
  > EOF
  $ hg pull ../a
  pulling from ../a
  searching for changes
  preoutgoing hook: HG_SOURCE=pull
  outgoing hook: HG_NODE=539e4b31b6dc99b3cfbaa6b53cbc1c1f9a1e3a10 HG_SOURCE=pull
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  adding remote bookmark quux
  (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

  $ echo "preoutgoing.forbid = printenv.py preoutgoing.forbid 1" >> ../a/.hg/hgrc
  $ hg pull ../a
  pulling from ../a
  searching for changes
  preoutgoing hook: HG_SOURCE=pull
  preoutgoing.forbid hook: 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 = printenv.py preoutgoing
  > outgoing = printenv.py outgoing
  > EOF
  $ hg clone a c
  preoutgoing hook: HG_SOURCE=clone
  outgoing hook: 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

  $ echo "preoutgoing.forbid = printenv.py preoutgoing.forbid 1" >> a/.hg/hgrc
  $ hg clone a zzz
  preoutgoing hook: HG_SOURCE=clone
  preoutgoing.forbid hook: HG_SOURCE=clone
  abort: preoutgoing.forbid hook exited with status 1
  [255]

  $ cd "$TESTTMP/b"

  $ cat > hooktests.py <<EOF
  > from mercurial import error
  > 
  > uncallable = 0
  > 
  > def printargs(args):
  >     args.pop('ui', None)
  >     args.pop('repo', None)
  >     a = list(args.items())
  >     a.sort()
  >     print 'hook args:'
  >     for k, v in a:
  >        print ' ', k, v
  > 
  > def passhook(**args):
  >     printargs(args)
  > 
  > def failhook(**args):
  >     printargs(args)
  >     return True
  > 
  > class LocalException(Exception):
  >     pass
  > 
  > def raisehook(**args):
  >     raise LocalException('exception from hook')
  > 
  > def aborthook(**args):
  >     raise error.Abort('raise abort from hook')
  > 
  > def brokenhook(**args):
  >     return 1 + {}
  > 
  > def verbosehook(ui, **args):
  >     ui.note('verbose output from hook\n')
  > 
  > def printtags(ui, repo, **args):
  >     print sorted(repo.tags())
  > 
  > class container:
  >     unreachable = 1
  > EOF

  $ cat > syntaxerror.py << EOF
  > (foo
  > 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]

The second egrep is to filter out lines like '    ^', which are slightly
different between Python 2.6 and Python 2.7.
  $ hg pull ../a --traceback 2>&1 | egrep -v '^( +File|    [_a-zA-Z*(])' | egrep -v '^( )+(\^)?$'
  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):
  ImportError: No module named hgext_syntaxerror
  Traceback (most recent call last):
  HookLoadError: preoutgoing.syntaxerror hook is invalid: import of "syntaxerror" failed
  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
  added 1 changesets with 1 changes to 1 files
  adding remote bookmark quux
  (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(**args):
  >     print "Automatically installed hook"
  > 
  > def reposetup(ui, repo):
  >     repo.ui.setconfig("hooks", "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
  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(**args):
  >     print 'hook works'
  > 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: No such file or directory: $TESTTMP/d/repo/nonexistent.py
  [255]

  $ hg id
  loading pre-identify.npmd hook failed:
  abort: No module named repo!
  [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 -v '^( +File|    [a-zA-Z(])'
  exception from first failed import attempt:
  Traceback (most recent call last):
  ImportError: No module named somebogusmodule
  exception from second failed import attempt:
  Traceback (most recent call last):
  ImportError: No module named hgext_importfail
  Traceback (most recent call last):
  HookLoadError: precommit.importfail hook is invalid: import of "importfail" failed
  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=
  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 = printenv.py post-init
  > EOF
  $ HGRCPATH=hgrc-with-post-init-hook hg init to
  post-init hook: HG_ARGS=init to 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 (glob)
  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
  added 1 changesets with 1 changes to 1 files
  changeset:   1:9836a07b9b9d
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     b
  

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, full bundle stored in * (glob)
  abort: pretxnclose.error hook exited with status 1
  [255]
  $ hg recover
  no interrupted transaction available
  [1]
  $ cd ..

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('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 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 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