exchangev2: fetch and apply phases data
Now that the server supports emitting phases data, we can request it
and apply it on the client.
Because we may receive phases-only updates from the server, we no
longer conditionally perform the "changesetdata" command depending
on whether there are revisions to fetch. In the previous wire
protocol, this case would result in us falling back to performing
"listkeys" commands to look up phases, bookmarks, etc data. But
since "changesetdata" is smart enough to handle metadata only
fetches, we can keep things consistent.
It's worth noting that because of the unified approach to changeset
data retrieval, phase handling code in wire proto v2 exchange is
drastically simpler. Contrast with all the code in exchange.py
dealing with all the variations for obtaining phases data.
Differential Revision: https://phab.mercurial-scm.org/D4484
#require cvs
Test config convert.cvsps.mergefrom config setting.
(Should test similar mergeto feature, but I don't understand it yet.)
Requires builtin cvsps.
$ CVSROOT=`pwd`/cvsrepo
$ export CVSROOT
$ cvscall()
> {
> cvs -f "$@"
> }
output of 'cvs ci' varies unpredictably, so just discard it
XXX copied from test-convert-cvs-synthetic
$ cvsci()
> {
> sleep 1
> cvs -f ci "$@" > /dev/null
> }
XXX copied from test-convert-cvs-synthetic
$ cat <<EOF >> $HGRCPATH
> [extensions]
> convert =
> [convert]
> cvsps.cache = 0
> cvsps.mergefrom = \[MERGE from (\S+)\]
> EOF
create cvs repository with one project
$ cvscall -q -d "$CVSROOT" init
$ mkdir cvsrepo/proj
populate cvs repository
$ cvscall -Q co proj
$ cd proj
$ touch file1
$ cvscall -Q add file1
$ cvsci -m"add file1 on trunk"
cvs commit: Examining .
create two release branches
$ cvscall -q tag -b v1_0
T file1
$ cvscall -q tag -b v1_1
T file1
modify file1 on branch v1_0
$ cvscall -Q update -rv1_0
$ sleep 1
$ echo "change" >> file1
$ cvsci -m"add text"
cvs commit: Examining .
make unrelated change on v1_1
$ cvscall -Q update -rv1_1
$ touch unrelated
$ cvscall -Q add unrelated
$ cvsci -m"unrelated change"
cvs commit: Examining .
merge file1 to v1_1
$ cvscall -Q update -jv1_0
RCS file: $TESTTMP/cvsrepo/proj/file1,v
retrieving revision 1.1
retrieving revision 1.1.2.1
Merging differences between 1.1 and 1.1.2.1 into file1
$ cvsci -m"add text [MERGE from v1_0]"
cvs commit: Examining .
merge change to trunk
$ cvscall -Q update -A
$ cvscall -Q update -jv1_1
RCS file: $TESTTMP/cvsrepo/proj/file1,v
retrieving revision 1.1
retrieving revision 1.1.4.1
Merging differences between 1.1 and 1.1.4.1 into file1
$ cvsci -m"add text [MERGE from v1_1]"
cvs commit: Examining .
non-merged change on trunk
$ echo "foo" > file2
$ cvscall -Q add file2
$ cvsci -m"add file2 on trunk" file2
this will create rev 1.3
change on trunk to backport
$ echo "backport me" >> file1
$ cvsci -m"add other text" file1
$ cvscall log file1
RCS file: $TESTTMP/cvsrepo/proj/file1,v
Working file: file1
head: 1.3
branch:
locks: strict
access list:
symbolic names:
v1_1: 1.1.0.4
v1_0: 1.1.0.2
keyword substitution: kv
total revisions: 5; selected revisions: 5
description:
----------------------------
revision 1.3
date: * (glob)
add other text
----------------------------
revision 1.2
date: * (glob)
add text [MERGE from v1_1]
----------------------------
revision 1.1
date: * (glob)
branches: 1.1.2; 1.1.4;
add file1 on trunk
----------------------------
revision 1.1.4.1
date: * (glob)
add text [MERGE from v1_0]
----------------------------
revision 1.1.2.1
date: * (glob)
add text
=============================================================================
XXX how many ways are there to spell "trunk" with CVS?
backport trunk change to v1_1
$ cvscall -Q update -rv1_1
$ cvscall -Q update -j1.2 -j1.3 file1
RCS file: $TESTTMP/cvsrepo/proj/file1,v
retrieving revision 1.2
retrieving revision 1.3
Merging differences between 1.2 and 1.3 into file1
$ cvsci -m"add other text [MERGE from HEAD]" file1
fix bug on v1_1, merge to trunk with error
$ cvscall -Q update -rv1_1
$ echo "merge forward" >> file1
$ cvscall -Q tag unmerged
$ cvsci -m"fix file1"
cvs commit: Examining .
$ cvscall -Q update -A
$ cvscall -Q update -junmerged -jv1_1
RCS file: $TESTTMP/cvsrepo/proj/file1,v
retrieving revision 1.1.4.2
retrieving revision 1.1.4.3
Merging differences between 1.1.4.2 and 1.1.4.3 into file1
note the typo in the commit log message
$ cvsci -m"fix file1 [MERGE from v1-1]"
cvs commit: Examining .
$ cvs -Q tag -d unmerged
convert to hg
$ cd ..
$ hg convert proj proj.hg
initializing destination proj.hg repository
connecting to $TESTTMP/cvsrepo
scanning source...
collecting CVS rlog
12 log entries
creating changesets
warning: CVS commit message references non-existent branch 'v1-1':
fix file1 [MERGE from v1-1]
10 changeset entries
sorting...
converting...
9 add file1 on trunk
8 unrelated change
7 add text
6 add text [MERGE from v1_0]
5 add text [MERGE from v1_1]
4 add file2 on trunk
3 add other text
2 add other text [MERGE from HEAD]
1 fix file1
0 fix file1 [MERGE from v1-1]
complete log
$ template="{rev}: '{branches}' {desc}\n"
$ hg -R proj.hg log --template="$template"
9: '' fix file1 [MERGE from v1-1]
8: 'v1_1' fix file1
7: 'v1_1' add other text [MERGE from HEAD]
6: '' add other text
5: '' add file2 on trunk
4: '' add text [MERGE from v1_1]
3: 'v1_1' add text [MERGE from v1_0]
2: 'v1_0' add text
1: 'v1_1' unrelated change
0: '' add file1 on trunk
graphical log
$ hg -R proj.hg log -G --template="$template"
o 9: '' fix file1 [MERGE from v1-1]
|
| o 8: 'v1_1' fix file1
| |
| o 7: 'v1_1' add other text [MERGE from HEAD]
|/|
o | 6: '' add other text
| |
o | 5: '' add file2 on trunk
| |
o | 4: '' add text [MERGE from v1_1]
|\|
| o 3: 'v1_1' add text [MERGE from v1_0]
| |\
+---o 2: 'v1_0' add text
| |
| o 1: 'v1_1' unrelated change
|/
o 0: '' add file1 on trunk