Re: exporting the last N days of a repository

On Wed, Nov 5, 2008 at 10:48 AM, Bob Hiestand [off-list ref] wrote:

On Tue, Nov 4, 2008 at 4:49 PM, Geoff Russell
[off-list ref] wrote:

quoted

Apologies to Johannes and Bob who have tried to help
but I'm still having difficulties, here is my current non-working script:

------------------------------------------------------------------
#!/bin/sh
DIR=/tmp/gitdemo
# for testing just arbitrarily
# select the 15th most recent commit as our new origin
NEWORIGIN=$(git rev-list master@{15} | head -1)
echo $NEWORIGIN
# checkout earlist point we are interested in
# we want to drop any history before this point
git checkout $NEWORIGIN
# now make a new directory, initialise with new origin
# and apply all commits after that point
mkdir $DIR && (cd $DIR ; git init) &&  \
   rsync -aHv --exclude=.git ./ $DIR && \
   (cd $DIR ; git add . ; git commit -m "starting point" </dev/null ) && \
   git fast-export $NEWORIGIN..master | (cd $DIR ; git fast-import )

----------------- end of script

The fast-import gives me a message I don't understand and doesn't
do the import.

If I understood your requirement (I know nothing about fast-export),
it would look like this:

#!/bin/sh
DIR=/tmp/gitdemo
ORIGDIR=$PWD
git checkout -b shorthistory
NEWORIGIN=$(git rev-list --since='5 months ago' --reverse HEAD| head -1)
echo $NEWORIGIN
git filter-branch --parent-filter '
       test $GIT_COMMIT = '$NEWORIGIN' &&
       echo || cat' \
       --tag-name-filter cat $NEWORIGIN^..
mkdir $DIR
cd $DIR
git init
git fetch $ORIGDIR shorthistory:master

Thanks Bob but when I ran your version (using master@{15} instead of
--since =...) it
effectively dropped the recent history, not the old history. Imagine a sequence
of 30 commits, no branches.  I want to keep, for example, 15 through
30 and dump 1
to 15.  So I need to have the working directory as at commit 15 and
then all the changes
to bring it up to 30.

       ... 11--12--13--14--15 ... 28--29--30

       ... Dump 1 to 15           keep 15 to 30.

Your script kept 1 to 15 and dumped the rest.

Cheers,
Geoff.

Thank you,

bob

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