git sparse-checkoutで一部以下のディレクトリしか見えなくする
http://vmiklos.hu/blog/sparse-checkout-example-in-git-1-7
http://www.kernel.org/pub/software/scm/git/docs/git-read-tree.html#_sparse_checkout
git sparse-checkoutはgit 1.7から備わった機能で、現在のワーキングコピー中で一部のディレクトリ以下のみを管理するように変えます。(見えてないディレクトリもダウンロードはされてるみたいです)
やり方としてはまず core.sparsecheckoutをtrueにして、.git/info/sparese/checkoutに見たいディレクトリパスを記述してgit read-tree -m -u HEADを実行すれば良い模様です。git read-treeについてはこちら。 http://www.kernel.org/pub/software/scm/git/docs/git-read-tree.html
具体的には下の様なコマンドを実行します。
% git config --global core.sparsecheckout true
% echo trunk/target > .git/info/sparse-checkout
% git read-tree -m -u HEAD
以下、実際に試した例です。
ここではディレクトリ構造を以下の通りと仮定しています。
+/trunk
++hoo.txt
++/target
+++bar.txt
+/branch
++baz.txt
この中でtrunk/target以下を見たい時の手順です。
% mkdir test-sparse-checkout
% cd test-sparse-checkout
% ls
% git init
Initialized empty Git repository in /*/test-sparse-checkout/.git/
% mkdir trunk
% mkdir trunk/target
% mkdir branch
% touch trunk/hoge.txt
% vim trunk/target/foo.txt
% vim branch/branch.txt
% git add trunk/hoge.txt
% git add trunk/target/foo.txt
% git add branch/branch.txt
% git commit -a
[master (root-commit) 3c72cf7] append sample text
3 files changed, 14 insertions(+)
create mode 100644 branch/branch.txt
create mode 100644 trunk/hoge.txt
create mode 100644 trunk/target/foo.txt
% git remote add origin git@####/test-sparse-checkout.git
% git push origin master Counting objects: 8, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (8/8), 482 bytes, done.
Total 8 (delta 0), reused 0 (delta 0)
To git@git@####/test-sparse-checkout.git
* [new branch] master -> master
% cd ../
% git clone git@git@####/test-sparse-checkout.git test-sparse-checkout2
Cloning into 'test-sparse-checkout2'...
remote: Counting objects: 8, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 8 (delta 0), reused 8 (delta 0)
Receiving objects: 100% (8/8), done.
% cd test-sparse-checkout2
% ls
branch trunk
% cd test-sparse-checkout2
% ls
branch trunk
% git config --global core.sparsecheckout true
% echo trunk/target > .git/info/sparse-checkout
% git read-tree -m -u HEAD
% ls
trunk
念の為sparse-checkoutしたときとそうでない時でサイズを確認します。
% du ../test-sparse-checkout2
72 ../test-sparse-checkout2/.git/hooks
16 ../test-sparse-checkout2/.git/info
8 ../test-sparse-checkout2/.git/logs/refs/heads
8 ../test-sparse-checkout2/.git/logs/refs
16 ../test-sparse-checkout2/.git/logs
0 ../test-sparse-checkout2/.git/objects/info
16 ../test-sparse-checkout2/.git/objects/pack
16 ../test-sparse-checkout2/.git/objects
8 ../test-sparse-checkout2/.git/refs/heads
8 ../test-sparse-checkout2/.git/refs/remotes/origin
8 ../test-sparse-checkout2/.git/refs/remotes
0 ../test-sparse-checkout2/.git/refs/tags
16 ../test-sparse-checkout2/.git/refs
176 ../test-sparse-checkout2/.git
8 ../test-sparse-checkout2/trunk/target
8 ../test-sparse-checkout2/trunk
184 ../test-sparse-checkout2
% git clone git@git@####/test-sparse-checkout.git test-sparse-checkout3
Cloning into 'test-sparse-checkout2'...
remote: Counting objects: 8, done.
remote: Compressing objects: 100% (3/3), done.
remote: Total 8 (delta 0), reused 8 (delta 0)
Receiving objects: 100% (8/8), done.
% du ./test-sparse-checkout3
72 test-sparse-checkout3/.git/hooks
8 test-sparse-checkout3/.git/info
8 test-sparse-checkout3/.git/logs/refs/heads
8 test-sparse-checkout3/.git/logs/refs
16 test-sparse-checkout3/.git/logs
0 test-sparse-checkout3/.git/objects/info
16 test-sparse-checkout3/.git/objects/pack
16 test-sparse-checkout3/.git/objects
8 test-sparse-checkout3/.git/refs/heads
8 test-sparse-checkout3/.git/refs/remotes/origin
8 test-sparse-checkout3/.git/refs/remotes
0 test-sparse-checkout3/.git/refs/tags
16 test-sparse-checkout3/.git/refs
168 test-sparse-checkout3/.git
8 test-sparse-checkout3/branch
8 test-sparse-checkout3/trunk/target
16 test-sparse-checkout3/trunk
192 test-sparse-checkout3
