I'm developing a distributed environment, mostly in PHP. A lot of the projects that I have share some of the same code. For example my logging code (based on log4php but with some custom additions).
I can just copy-paste this code in every project, but naturally, if I change anything in it I need to re-paste it everywhere and 'hope' it doesn't change anything. Obviously not a good way.
Now, I was wondering: what is the best and simplest way of sharing this code? I'm hoping there is something as easy as making your own private PEAR-like channel? Do people do this for this use case? Or is there an ever easier way? I rather not start with inter-dependent repositories etc. If it matters though, I use Mercurial for versioning.
Thanks all.
Perhaps the best way (I am using too) is to host the common code in a versioning system such as Git or Mercurial or SVN and checkout this code in each related project. As long such a project does not have updates you can continue to work on your common code. In the case you want to touch a project again that utilizes the common code, you need to perform a source code update or pull. Then you update your project sources according to the changes of the common source base.
What about include_path PHP directive?
Just add include_path, for example /usr/share/php5/
and include your file like yourfile.php from each project
Use Git or Mercurial for that. In both of them, you can create sub-modules or sub-repositories.
http://kernel.org/pub/software/scm/git/docs/git-submodule.html
来源：https://stackoverflow.com/questions/6891071/best-way-to-share-custom-php-code-amongst-projects