一 使用git进行代码打包

git archive --format=tar --prefix=junk/ HEAD | (cd /var/tmp/ && tar xf -)

Create a tar archive that contains the contents of the latest commit on the current branch, and extract it in the /var/tmp/junk directory.

git archive --format=tar --prefix=git-1.4.0/ v1.4.0 | gzip >git-1.4.0.tar.gz

Create a compressed tarball for v1.4.0 release.

git archive -o latest.zip HEAD

Create a Zip archive that contains the contents of the latest commit on the current branch. Note that the output format is inferred by the extension of the output file.

在git打包中有几点需要注意
export-ignore
Files and directories with the attribute export-ignore won’t be added to archive files. See gitattributes[5] for details.
也就是export-ignore文件不会被打包
export-subst
If the attribute export-subst is set for a file then Git will expand several placeholders when adding this file to an archive. See gitattributes[5] for details.
export-subst的使用规则如下：

$ echo 'Last commit date: $Format:%cd$' > LAST_COMMIT
$ echo "LAST_COMMIT export-subst" >> .gitattributes
$ git add LAST_COMMIT .gitattributes
$ git commit -am 'adding LAST_COMMIT file for archives'

当你使用git archive的时候

$ cat LAST_COMMIT
Last commit date: $Format:Tue Apr 21 08:38:48 2009 -0700$