hg: support for auto sharing stores when cloning
Many 3rd party consumers of Mercurial have created wrappers to
essentially perform clone+share as a single operation. This is
especially popular in automated processes like continuous integration
systems. The Jenkins CI software and Mozilla's Firefox release
automation infrastructure have both implemented custom code that
effectively perform clone+share. The common use case here is that
clients want to obtain N>1 checkouts while minimizing disk space and
network requirements. Furthermore, they often don't care that a clone
is an exact mirror of a remote: they are simply looking to obtain
checkouts of specific revisions.
When multiple third parties implement a similar feature, it's a good
sign that the feature is worth adding to the core product. This patch
adds support for an easy-to-use clone+share feature.
The internal "clone" function now accepts options to control auto
sharing during clone. When the auto share mode is active, a store will
be created/updated under the base directory specified and a new
repository pointing to the shared store will be created at the path
specified by the user.
The share extension has grown the ability to pass these options into
the clone command/function.
No command line options for this feature are added because we don't
feel the feature will be popular enough to warrant their existence.
There are two modes for auto share mode. In the default mode, the shared
repo is derived from the first changeset (rev 0) in the remote
repository. This enables related repositories existing at different URLs
to automatically use the same storage. In environments that operate
several repositories (separate repo for branch/head/bookmark or separate
repo per user), this has the potential to drastically reduce storage
and network requirements. In the other mode, the name is derived from the
remote's path/URL.
#require cvs
$ cvscall()
> {
> cvs -f "$@"
> }
$ hgcat()
> {
> hg --cwd src-hg cat -r tip "$1"
> }
$ echo "[extensions]" >> $HGRCPATH
$ echo "convert = " >> $HGRCPATH
$ cat > cvshooks.py <<EOF
> def cvslog(ui,repo,hooktype,log):
> print "%s hook: %d entries"%(hooktype,len(log))
>
> def cvschangesets(ui,repo,hooktype,changesets):
> print "%s hook: %d changesets"%(hooktype,len(changesets))
> EOF
$ hookpath=`pwd`
$ cat <<EOF >> $HGRCPATH
> [hooks]
> cvslog = python:$hookpath/cvshooks.py:cvslog
> cvschangesets = python:$hookpath/cvshooks.py:cvschangesets
> EOF
create cvs repository
$ mkdir cvsrepo
$ cd cvsrepo
$ CVSROOT=`pwd`
$ export CVSROOT
$ CVS_OPTIONS=-f
$ export CVS_OPTIONS
$ cd ..
$ rmdir cvsrepo
$ cvscall -q -d "$CVSROOT" init
create source directory
$ mkdir src-temp
$ cd src-temp
$ echo a > a
$ mkdir b
$ cd b
$ echo c > c
$ cd ..
import source directory
$ cvscall -q import -m import src INITIAL start
N src/a
N src/b/c
No conflicts created by this import
$ cd ..
checkout source directory
$ cvscall -q checkout src
U src/a
U src/b/c
commit a new revision changing b/c
$ cd src
$ sleep 1
$ echo c >> b/c
$ cvscall -q commit -mci0 . | grep '<--'
$TESTTMP/cvsrepo/src/b/c,v <-- *c (glob)
$ cd ..
convert fresh repo and also check localtimezone option
NOTE: This doesn't check all time zones -- it merely determines that
the configuration option is taking effect.
An arbitrary (U.S.) time zone is used here. TZ=US/Hawaii is selected
since it does not use DST (unlike other U.S. time zones) and is always
a fixed difference from UTC.
$ TZ=US/Hawaii hg convert --config convert.localtimezone=True src src-hg
initializing destination src-hg repository
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
5 log entries
cvslog hook: 5 entries
creating changesets
3 changeset entries
cvschangesets hook: 3 changesets
sorting...
converting...
2 Initial revision
1 ci0
0 import
updating tags
$ hgcat a
a
$ hgcat b/c
c
c
convert fresh repo with --filemap
$ echo include b/c > filemap
$ hg convert --filemap filemap src src-filemap
initializing destination src-filemap repository
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
5 log entries
cvslog hook: 5 entries
creating changesets
3 changeset entries
cvschangesets hook: 3 changesets
sorting...
converting...
2 Initial revision
1 ci0
0 import
filtering out empty revision
repository tip rolled back to revision 1 (undo convert)
updating tags
$ hgcat b/c
c
c
$ hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
2 update tags files: .hgtags
1 ci0 files: b/c
0 Initial revision files: b/c
convert full repository (issue1649)
$ cvscall -q -d "$CVSROOT" checkout -d srcfull "." | grep -v CVSROOT
U srcfull/src/a
U srcfull/src/b/c
$ ls srcfull
CVS
CVSROOT
src
$ hg convert srcfull srcfull-hg \
> | grep -v 'log entries' | grep -v 'hook:' \
> | grep -v '^[0-3] .*' # filter instable changeset order
initializing destination srcfull-hg repository
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
creating changesets
4 changeset entries
sorting...
converting...
updating tags
$ hg cat -r tip --cwd srcfull-hg src/a
a
$ hg cat -r tip --cwd srcfull-hg src/b/c
c
c
commit new file revisions
$ cd src
$ echo a >> a
$ echo c >> b/c
$ cvscall -q commit -mci1 . | grep '<--'
$TESTTMP/cvsrepo/src/a,v <-- a
$TESTTMP/cvsrepo/src/b/c,v <-- *c (glob)
$ cd ..
convert again
$ TZ=US/Hawaii hg convert --config convert.localtimezone=True src src-hg
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
7 log entries
cvslog hook: 7 entries
creating changesets
4 changeset entries
cvschangesets hook: 4 changesets
sorting...
converting...
0 ci1
$ hgcat a
a
a
$ hgcat b/c
c
c
c
convert again with --filemap
$ hg convert --filemap filemap src src-filemap
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
7 log entries
cvslog hook: 7 entries
creating changesets
4 changeset entries
cvschangesets hook: 4 changesets
sorting...
converting...
0 ci1
$ hgcat b/c
c
c
c
$ hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
3 ci1 files: b/c
2 update tags files: .hgtags
1 ci0 files: b/c
0 Initial revision files: b/c
commit branch
$ cd src
$ cvs -q update -r1.1 b/c
U b/c
$ cvs -q tag -b branch
T a
T b/c
$ cvs -q update -r branch > /dev/null
$ echo d >> b/c
$ cvs -q commit -mci2 . | grep '<--'
$TESTTMP/cvsrepo/src/b/c,v <-- *c (glob)
$ cd ..
convert again
$ TZ=US/Hawaii hg convert --config convert.localtimezone=True src src-hg
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
8 log entries
cvslog hook: 8 entries
creating changesets
5 changeset entries
cvschangesets hook: 5 changesets
sorting...
converting...
0 ci2
$ hgcat b/c
c
d
convert again with --filemap
$ TZ=US/Hawaii hg convert --config convert.localtimezone=True --filemap filemap src src-filemap
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
8 log entries
cvslog hook: 8 entries
creating changesets
5 changeset entries
cvschangesets hook: 5 changesets
sorting...
converting...
0 ci2
$ hgcat b/c
c
d
$ hg -R src-filemap log --template '{rev} {desc} files: {files}\n'
4 ci2 files: b/c
3 ci1 files: b/c
2 update tags files: .hgtags
1 ci0 files: b/c
0 Initial revision files: b/c
commit a new revision with funny log message
$ cd src
$ sleep 1
$ echo e >> a
$ cvscall -q commit -m'funny
> ----------------------------
> log message' . | grep '<--' |\
> sed -e 's:.*src/\(.*\),v.*:checking in src/\1,v:g'
checking in src/a,v
commit new file revisions with some fuzz
$ sleep 1
$ echo f >> a
$ cvscall -q commit -mfuzzy . | grep '<--'
$TESTTMP/cvsrepo/src/a,v <-- a
$ sleep 4 # the two changes will be split if fuzz < 4
$ echo g >> b/c
$ cvscall -q commit -mfuzzy . | grep '<--'
$TESTTMP/cvsrepo/src/b/c,v <-- *c (glob)
$ cd ..
convert again
$ TZ=US/Hawaii hg convert --config convert.cvsps.fuzz=2 --config convert.localtimezone=True src src-hg
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
11 log entries
cvslog hook: 11 entries
creating changesets
8 changeset entries
cvschangesets hook: 8 changesets
sorting...
converting...
2 funny
1 fuzzy
0 fuzzy
$ hg -R src-hg log -G --template '{rev} ({branches}) {desc} date: {date|date} files: {files}\n'
o 8 (branch) fuzzy date: * -1000 files: b/c (glob)
|
o 7 (branch) fuzzy date: * -1000 files: a (glob)
|
o 6 (branch) funny
| ----------------------------
| log message date: * -1000 files: a (glob)
o 5 (branch) ci2 date: * -1000 files: b/c (glob)
o 4 () ci1 date: * -1000 files: a b/c (glob)
|
o 3 () update tags date: * +0000 files: .hgtags (glob)
|
| o 2 (INITIAL) import date: * -1000 files: (glob)
| |
o | 1 () ci0 date: * -1000 files: b/c (glob)
|/
o 0 () Initial revision date: * -1000 files: a b/c (glob)
testing debugcvsps
$ cd src
$ hg debugcvsps --fuzz=2
collecting CVS rlog
11 log entries
cvslog hook: 11 entries
creating changesets
10 changeset entries
cvschangesets hook: 10 changesets
---------------------
PatchSet 1
Date: * (glob)
Author: * (glob)
Branch: HEAD
Tag: (none)
Branchpoints: INITIAL
Log:
Initial revision
Members:
a:INITIAL->1.1
---------------------
PatchSet 2
Date: * (glob)
Author: * (glob)
Branch: HEAD
Tag: (none)
Branchpoints: INITIAL, branch
Log:
Initial revision
Members:
b/c:INITIAL->1.1
---------------------
PatchSet 3
Date: * (glob)
Author: * (glob)
Branch: INITIAL
Tag: start
Log:
import
Members:
a:1.1->1.1.1.1
b/c:1.1->1.1.1.1
---------------------
PatchSet 4
Date: * (glob)
Author: * (glob)
Branch: HEAD
Tag: (none)
Log:
ci0
Members:
b/c:1.1->1.2
---------------------
PatchSet 5
Date: * (glob)
Author: * (glob)
Branch: HEAD
Tag: (none)
Branchpoints: branch
Log:
ci1
Members:
a:1.1->1.2
---------------------
PatchSet 6
Date: * (glob)
Author: * (glob)
Branch: HEAD
Tag: (none)
Log:
ci1
Members:
b/c:1.2->1.3
---------------------
PatchSet 7
Date: * (glob)
Author: * (glob)
Branch: branch
Tag: (none)
Log:
ci2
Members:
b/c:1.1->1.1.2.1
---------------------
PatchSet 8
Date: * (glob)
Author: * (glob)
Branch: branch
Tag: (none)
Log:
funny
----------------------------
log message
Members:
a:1.2->1.2.2.1
---------------------
PatchSet 9
Date: * (glob)
Author: * (glob)
Branch: branch
Tag: (none)
Log:
fuzzy
Members:
a:1.2.2.1->1.2.2.2
---------------------
PatchSet 10
Date: * (glob)
Author: * (glob)
Branch: branch
Tag: (none)
Log:
fuzzy
Members:
b/c:1.1.2.1->1.1.2.2
$ cd ..