revisionbranchcache: fall back to slow path if starting readonly (issue4531)
Transitioning to Mercurial versions with revision branch cache could be slow as
long as all operations were readonly (revset queries) and the cache would be
populated but not written back.
Instead, fall back to using the consistently slow path when readonly and the
cache doesn't exist yet. That avoids the overhead of populating the cache
without writing it back.
If not readonly, it will still populate all missing entries initially. That
avoids repeated writing of the cache file with small updates, and it also makes
sure a fully populated cache available for the readonly operations.
#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
$ "$TESTDIR/get-with-headers.py" localhost:$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
$ "$TESTDIR/get-with-headers.py" localhost:$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
$ "$TESTDIR/get-with-headers.py" localhost:$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
$ "$TESTDIR/killdaemons.py" $DAEMON_PIDS