Re: is it possible filter the revision history of a single file into another repository?

> On Thursday, 18. December 2008 14:51:12 Whit Armstrong wrote:
>> For instance, if my repository contains foo.c, and 100 other files.
>>
>> I would like to create a new and separate repository containing only
>> the revision history of foo.c.
>>
>> Would someone mind pointing me at some documentation for this
>> procedure if it exists?
>
> This worked for me:
>
> git filter-branch --tag-name-filter cat --index-filter \
>    'git ls-files -s |grep -P "\t(DIR1|DIR2)" \
>    |GIT_INDEX_FILE=$GIT_INDEX_FILE.new git update-index --index-info &&
>    mv $GIT_INDEX_FILE.new $GIT_INDEX_FILE' -- --all
>
> Run "git ls-files -s" to see the output format.
> Replace the "DIR1|DIR2" with "foo.c".
>
> Later on you might want to remove empty commits from the history:
> git filter-branch --tag-name-filter cat --commit-filter 'if [ z$1 = z`git rev-parse $3^{tree}` ]; then skip_commit "$@"; else git commit-tree "$@"; fi' "$@" -- --all
>
> If you want to run two filter-branch commands in a row
> or you want to free up the space in .git afterwards:
>
> - git for-each-ref --format='%(refname)' refs/original | xargs -i git update-ref -d {}
> - git reflog expire --expire=0 --all
> - git repack -a -d
> - git prune
>
> Cheers,
> Thomas
>
>