拆分GIt項目並回收空間

將代碼傳到Bitbucket上時，發現Bitbucket有1G空間限制。正好有一個以前項目是用Ant打包的，依賴的jar不少，一查果真超過1G限制，須要將項目的jar分拆成兩個單獨的項目。操做以下。

假設要將myproject項目中的子目錄sub3拆成單獨項目

myproject/
    .git/
    sub1/
    sub2/
    sub3/
        sub3_s1/
        sub3_s2/

myproject/
    .git/
    sub1/
    sub2/
sub3/
    .git/
    sub3_s1/
    sub3_s2/

1.查看項目空間大小

git count-objects -vH

--------------

count: 0
size: 0 bytes
in-pack: 325742
packs: 1
size-pack: 377.18 MiB
prune-packable: 0
garbage: 0
size-garbage: 0 bytes

 

2.分拆子目錄(sub3)爲新項目

git clone /myproject /sub3

git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter sub3 -- --all

git reset --hard
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
git reflog expire --expire=now --all
git gc --aggressive --prune=now

 

3.刪除子目錄並回收空間

git filter-branch --tree-filter 'rm -rf sub3' --prune-empty HEAD
git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d
echo sub3/ >> .gitignore
git add .gitignore
git commit -m 'Removing sub3 from git history'
# Perform a garbage collection to remove commits with no refs
git gc --prune=all --aggressive
git push origin master --force

4.回收額外空間

java -jar bfg.jar --strip-blobs-bigger-than 10M

 

參考：

http://stackoverflow.com/questions/359424/detach-move-subdirectory-into-separate-git-repository

https://help.github.com/articles/splitting-a-subfolder-out-into-a-new-repository/

http://stackoverflow.com/questions/10067848/remove-folder-and-its-contents-from-git-githubs-history

https://confluence.atlassian.com/bitbucket/reduce-repository-size-321848262.html