Re: [libvirt] Switch from CVS to GIT is done
Daniel Veillard wrote:
Thanks to Jim Meyering we now have a new git repository, I
deprecated the
CVS repository, it's read only, you should still be able to keep it
around to make patches for a few weeks if needed.
The new repo is at:
http://libvirt.org/git/?p=libvirt.git;a=summary
To create that new repository, I rewrote the git repository from
et.redhat.com to correct a few minor problems.
In case anyone is interested, here are the details.
---------------------------------------
Some commits had incomplete names.
Run this to see all 64 commits:
$ git log --pretty=format:%h:%an|grep -v ' '
Here's a summary:
$ git log --pretty=format:%an|grep -v ' '|sort|uniq -c
1 aliguori
13 clalance
3 crobinso
8 danms
5 dlesko
23 meyering
11 sakaia
============================
Note that rewriting changes nearly all SHA1 values, so
any reference to an SHA1 in a commit log should be updated
to point to the new SHA1. There are a few:
$ git log|grep -E '\b[0-9a-f]{7,40}\b'|grep -v '^commit'
This regressed via commit 4c3f3b4d.
[043d702f] "use virAsprintf instead of asprintf" introducted
The 'getVer' fix introducted in d88d459d [Allow remote://hostname/
Bug introduced in 895d0fdf5bef358fafb91c672609190b3088097b.
====================================================
Run the following long(!) command to rewrite the "master" branch,
preserving tags (but not signed ones), fixing bogus author names and
preserving SHA1 references like the above:
git filter-branch -d $TMPDIR/.git-rewrite \
--tag-name-filter cat \
--env-filter '
case $GIT_AUTHOR_NAME in
agx) n="Guido Günther" e="agx(a)sigxcpu.org" ;;
aliguori) n="Anthony Liguori" e="aliguori(a)us.ibm.com" ;;
clalance) n="Chris Lalancette" e="clalance(a)redhat.com" ;;
crobinso) n="Cole Robinson" e="crobinso(a)redhat.com" ;;
danms) n="Dan Smith" e="danms(a)us.ibm.com" ;;
dlesko) n="David L. Leskovec" e="dlesko(a)linux.vnet.ibm.com" ;;
meyering) n="Jim Meyering" e="meyering(a)redhat.com" ;;
sakaia) n="Atsushi SAKAI" e="sakaia(a)jp.fujitsu.com" ;;
*) n=$GIT_AUTHOR_NAME e=$GIT_AUTHOR_EMAIL ;;
esac
export GIT_AUTHOR_EMAIL=$e GIT_AUTHOR_NAME=$n
export GIT_COMMITTER_EMAIL=$e GIT_COMMITTER_NAME=$n
' --msg-filter '
cat > t.msg
ref=$(perl -ne "/\b([0-9a-f]{7,40})\b/ and print \$1" t.msg)
test -n "$ref" && sha=$(git rev-parse $ref) &&
{
len=$(printf $ref|wc -c)
new_sha=$(map $sha)
short_sha=$(printf %.${len}s $new_sha)
perl -pi -e "s/$ref/$short_sha/" t.msg
}
cat t.msg
' master
I tested it on this tiny repository:
git init -q; : > j; git add j; git ci -q --author='meyering <meyering>'
-m. -a
c=$(git log --pretty=%h)
echo a > j; git ci -q -m "fix bug in $c" -a
====================================================
The above preserves regular tags, but not the signed ones.
Reapply the signed vM.N.O tags:
for i in $(git tag -l 'LIBVIRT_*'); do
v=$(echo $i|sed 's/LIBVIRT_/v/;s/_/./g')
echo $v
git tag -f -s -m$v $v $i
done
====================================================
With the above changes, we've bloated the repository by ~50%,
increasing its size from 22M to 34M.
Remove the cruft:
git for-each-ref --format="%(refname)" refs/original/ \
| xargs -n 1 git update-ref -d
git reflog expire --expire=now --all
git gc --prune=now
And that brings it back down to 23M.
Run this function
git-repo-compress()
{
local d=$1
du -sh "$d"; start=$(date); /usr/bin/time \
git --git-dir=$d repack -afd --window=250 --depth=250
echo started $start; date; du -sh "$d"
}
to compress a few remaining bits.
Final size: 21M.
Push to libvirt.org:
git push libvirt.org:/git/libvirt.git master:master
git push --tags libvirt.org:/git/libvirt.git
====================================================
After I'd pushed all of the above, Dan Berrange noticed
that the new signed tags were out of order and had all
been created today.
Back-date the signed tags so that each has the same date as its
unsigned counterpart:
for i in $(git tag -l 'LIBVIRT_*'); do
v=$(echo $i|sed 's/LIBVIRT_/v/;s/_/./g')
date=$(git log --pretty=%ci -1 $i)
echo $v
GIT_COMMITTER_DATE="$date" git tag -f -s -m$v $v $i
done
# And push (now we need the -f option):
git push -f --tags libvirt.org:/git/libvirt.git