tests/test-mq-qclone-http.t
author FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
Wed, 02 Dec 2015 03:12:07 +0900
changeset 27192 a01d3d32b53a
parent 25474 8c14f87bd0ae
child 34661 eb586ed5d8ce
permissions -rw-r--r--
commands: make commit acquire locks before processing (issue4368) Before this patch, "hg commit" (process A) executes steps below: 1. get current branch heads via 'repo.branchheads()' - cache 'repo.changelog' 2. invoke 'repo.commit()' 3. acquire wlock - invalidate 'repo.dirstate' 4. access 'repo.dirstate' - re-read '.hg/dirstate' - check validity of parent revisions with 'repo.changelog' 5. invoke 'repo.commitctx()' 6. acquire store lock (slock) - invalidate 'repo.changelog' 7. do committing 8. release slock 9. release wlock 10. check new branch head (via 'cmdutil.commitstatus()') If acquisition of wlock at (3) above waits for another "hg commit" (process B) or so running parallelly to release wlock, process A causes creating orphan revision, because: - '.hg/dirstate' refers the revision, which is newly added by process B, as its parent - but already cached 'repo.changelog' doesn't contain such revision - therefore, validating parents of '.hg/dirstate' at (4) above replaces such revision with 'nullid' Then, process A creates "orphan" revision, of which parent is "null" revision. In addition to it, "created new head" may be shown at the end of process A unintentionally, if store is updated parallelly, because both getting branch heads (1) and checking new branch head (10) are executed outside slock scope. To avoid this issue, this patch makes "hg commit" acquire wlock and slock before processing. This patch resolves the issue between "hg commit" processes, but not one between "hg commit" and other commands. Subsequent patches resolve the latter. Even after this patch, there are still corner case problems below: - filecache may overlook changes of '.hg/dirstate', and it causes similar issue (see below for detail) https://bz.mercurial-scm.org/show_bug.cgi?id=4368#c10 - 3rd party extension may cause similar issue, if it directly uses 'repo.commit()' without acquisition of wlock and slock This can be fixed by acquisition of slock at the beginning of 'repo.commit()', but it seems suitable for "default" branch In fact, acquisition of slock itself is already introduced at "default" branch by 4414d500604f, but acquisition is not at the beginning of 'repo.commit()'. This patch also changes some tests: - test-fncache.t needs this tricky wrapping, to release (= forced failure of) wlock certainly - order of "hg commit" output is changed by widening scope of locks, because some hooks are fired after releasing wlock

#require killdaemons

hide outer repo
  $ hg init

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "mq=" >> $HGRCPATH
  $ mkdir webdir
  $ cd webdir
  $ hg init a
  $ hg --cwd a qinit -c
  $ echo a > a/a
  $ hg --cwd a ci -A -m a
  adding a
  $ echo b > a/b
  $ hg --cwd a addremove
  adding b
  $ hg --cwd a qnew -f b.patch
  $ hg --cwd a qcommit -m b.patch
  $ hg --cwd a log --template "{desc}\n"
  [mq]: b.patch
  a
  $ hg --cwd a/.hg/patches log --template "{desc}\n"
  b.patch
  $ root=`pwd`
  $ cd ..

test with recursive collection

  $ cat > collections.conf <<EOF
  > [paths]
  > /=$root/**
  > EOF
  $ hg serve -p $HGPORT -d --pid-file=hg.pid --webdir-conf collections.conf \
  >     -A access-paths.log -E error-paths-1.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ get-with-headers.py localhost:$HGPORT '?style=raw'
  200 Script output follows
  
  
  /a/
  /a/.hg/patches/
  
  $ hg qclone http://localhost:$HGPORT/a b
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 3 changes to 3 files
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --cwd b log --template "{desc}\n"
  a
  $ hg --cwd b qpush -a
  applying b.patch
  now at: b.patch
  $ hg --cwd b log --template "{desc}\n"
  imported patch b.patch
  a

test with normal collection

  $ cat > collections1.conf <<EOF
  > [paths]
  > /=$root/*
  > EOF
  $ hg serve -p $HGPORT1 -d --pid-file=hg.pid --webdir-conf collections1.conf \
  >     -A access-paths.log -E error-paths-1.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ get-with-headers.py localhost:$HGPORT1 '?style=raw'
  200 Script output follows
  
  
  /a/
  /a/.hg/patches/
  
  $ hg qclone http://localhost:$HGPORT1/a c
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 3 changes to 3 files
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --cwd c log --template "{desc}\n"
  a
  $ hg --cwd c qpush -a
  applying b.patch
  now at: b.patch
  $ hg --cwd c log --template "{desc}\n"
  imported patch b.patch
  a

test with old-style collection

  $ cat > collections2.conf <<EOF
  > [collections]
  > $root=$root
  > EOF
  $ hg serve -p $HGPORT2 -d --pid-file=hg.pid --webdir-conf collections2.conf \
  >     -A access-paths.log -E error-paths-1.log
  $ cat hg.pid >> $DAEMON_PIDS
  $ get-with-headers.py localhost:$HGPORT2 '?style=raw'
  200 Script output follows
  
  
  /a/
  /a/.hg/patches/
  
  $ hg qclone http://localhost:$HGPORT2/a d
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 3 changes to 3 files
  updating to branch default
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg --cwd d log --template "{desc}\n"
  a
  $ hg --cwd d qpush -a
  applying b.patch
  now at: b.patch
  $ hg --cwd d log --template "{desc}\n"
  imported patch b.patch
  a

test --mq works and uses correct repository config

  $ hg --cwd d outgoing --mq
  comparing with http://localhost:$HGPORT2/a/.hg/patches
  searching for changes
  no changes found
  [1]
  $ hg --cwd d log --mq --template '{rev} {desc|firstline}\n'
  0 b.patch

  $ killdaemons.py