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================================
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Test corner case around bookmark
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================================
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This test file is meant to gather test around bookmark that are specific
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enough to not find a place elsewhere.
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Test bookmark/changelog race condition
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======================================
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The data from the bookmark file are filtered to only contains bookmark with
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node known to the changelog. If the cache invalidation between these two bits
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goes wrong, bookmark can be dropped.
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Setup
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-----
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initial repository setup
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$ hg init bookrace-server
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$ cd bookrace-server
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$ echo a > a
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$ hg add a
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$ hg commit -m root
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$ echo a >> a
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$ hg bookmark book-A
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$ hg commit -m A0
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$ hg up 'desc(root)'
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1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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(leaving bookmark book-A)
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$ echo b > b
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$ hg add b
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$ hg bookmark book-B
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$ hg commit -m B0
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created new head
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$ hg up null
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0 files updated, 0 files merged, 2 files removed, 0 files unresolved
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(leaving bookmark book-B)
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$ hg phase --public --rev 'all()'
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$ hg log -G
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o changeset: 2:c79985706978
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| bookmark: book-B
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| tag: tip
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| parent: 0:6569b5a81c7e
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| user: test
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| date: Thu Jan 01 00:00:00 1970 +0000
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| summary: B0
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| o changeset: 1:39c28d785860
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|/ bookmark: book-A
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| user: test
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| date: Thu Jan 01 00:00:00 1970 +0000
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| summary: A0
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o changeset: 0:6569b5a81c7e
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user: test
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date: Thu Jan 01 00:00:00 1970 +0000
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summary: root
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$ hg book
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book-A 1:39c28d785860
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book-B 2:c79985706978
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$ cd ..
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Add new changeset on each bookmark in distinct clones
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$ hg clone ssh://user@dummy/bookrace-server client-A
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requesting all changes
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adding changesets
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adding manifests
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adding file changes
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added 3 changesets with 3 changes to 2 files (+1 heads)
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new changesets 6569b5a81c7e:c79985706978
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updating to branch default
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2 files updated, 0 files merged, 0 files removed, 0 files unresolved
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$ hg -R client-A update book-A
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1 files updated, 0 files merged, 1 files removed, 0 files unresolved
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(activating bookmark book-A)
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$ echo a >> client-A/a
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$ hg -R client-A commit -m A1
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$ hg clone ssh://user@dummy/bookrace-server client-B
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requesting all changes
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adding changesets
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adding manifests
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adding file changes
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added 3 changesets with 3 changes to 2 files (+1 heads)
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new changesets 6569b5a81c7e:c79985706978
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updating to branch default
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2 files updated, 0 files merged, 0 files removed, 0 files unresolved
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$ hg -R client-B update book-B
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0 files updated, 0 files merged, 0 files removed, 0 files unresolved
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(activating bookmark book-B)
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$ echo b >> client-B/b
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$ hg -R client-B commit -m B1
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extension to reproduce the race
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-------------------------------
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If two process are pushing we want to make sure the following happens:
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* process A read changelog
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* process B to its full push
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* process A read bookmarks
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* process A proceed with rest of the push
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We build a server side extension for this purpose
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$ cat > bookrace.py << EOF
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> import atexit
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> import os
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> import time
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> from mercurial import bookmarks, error, extensions
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>
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> def wait(repo):
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> if not os.path.exists('push-A-started'):
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> assert repo._currentlock(repo._lockref) is None
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> assert repo._currentlock(repo._wlockref) is None
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> repo.ui.status(b'setting raced push up\n')
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> with open('push-A-started', 'w'):
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> pass
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> clock = 300
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> while not os.path.exists('push-B-done'):
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> clock -= 1
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> if clock <= 0:
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> raise error.Abort("race scenario timed out")
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> time.sleep(0.1)
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>
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> def reposetup(ui, repo):
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> class racedrepo(repo.__class__):
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> @property
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> def _bookmarks(self):
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> wait(self)
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> return super(racedrepo, self)._bookmarks
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> repo.__class__ = racedrepo
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>
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> def e():
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> with open('push-A-done', 'w'):
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> pass
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> atexit.register(e)
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> EOF
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Actual test
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-----------
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Start the raced push.
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$ cat >> bookrace-server/.hg/hgrc << EOF
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> [extensions]
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> bookrace=$TESTTMP/bookrace.py
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> EOF
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$ hg push -R client-A -r book-A >push-output.txt 2>&1 &
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Wait up to 30 seconds for that push to start.
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$ clock=30
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$ while [ ! -f push-A-started ] && [ $clock -gt 0 ] ; do
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> clock=`expr $clock - 1`
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> sleep 1
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> done
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Do the other push.
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$ cat >> bookrace-server/.hg/hgrc << EOF
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> [extensions]
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> bookrace=!
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> EOF
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$ hg push -R client-B -r book-B
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pushing to ssh://user@dummy/bookrace-server
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searching for changes
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remote: adding changesets
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remote: adding manifests
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remote: adding file changes
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remote: added 1 changesets with 1 changes to 1 files
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updating bookmark book-B
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Signal the raced put that we are done (it waits up to 30 seconds).
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$ touch push-B-done
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Wait for the raced push to finish (with the remaning of the initial 30 seconds).
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$ while [ ! -f push-A-done ] && [ $clock -gt 0 ] ; do
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> clock=`expr $clock - 1`
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> sleep 1
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> done
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Check raced push output.
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$ cat push-output.txt
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pushing to ssh://user@dummy/bookrace-server
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searching for changes
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remote: setting raced push up
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remote has heads on branch 'default' that are not known locally: f26c3b5167d1
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remote: adding changesets
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remote: adding manifests
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remote: adding file changes
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remote: added 1 changesets with 1 changes to 1 files
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updating bookmark book-A
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Check result of the push.
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$ hg -R bookrace-server log -G
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o changeset: 4:9ce3b28c16de
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| bookmark: book-A
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| tag: tip
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| parent: 1:39c28d785860
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| user: test
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| date: Thu Jan 01 00:00:00 1970 +0000
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| summary: A1
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| o changeset: 3:f26c3b5167d1
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| | bookmark: book-B
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| | user: test
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| | date: Thu Jan 01 00:00:00 1970 +0000
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| | summary: B1
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| o changeset: 2:c79985706978
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| | parent: 0:6569b5a81c7e
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| | user: test
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| | date: Thu Jan 01 00:00:00 1970 +0000
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| | summary: B0
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o | changeset: 1:39c28d785860
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|/ user: test
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| date: Thu Jan 01 00:00:00 1970 +0000
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| summary: A0
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o changeset: 0:6569b5a81c7e
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user: test
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date: Thu Jan 01 00:00:00 1970 +0000
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summary: root
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$ hg -R bookrace-server book
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book-A 4:9ce3b28c16de
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book-B 3:f26c3b5167d1
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