发布于 2015-08-09 04:33:48 | 245 次阅读 | 评论: 0 | 来源: 网络整理
A version constraint without an upper bound such as *, >=3.4 or dev-master will allow updates to any future version of the dependency. This includes major versions breaking backward compatibility.
Once a release of your package is tagged, you cannot tweak its dependencies anymore in case a dependency breaks BC - you have to do a new release but the previous one stays broken.
The only good alternative is to define an upper bound on your constraints, which you can increase in a new release after testing that your package is compatible with the new major version of your dependency.
For example instead of using >=3.4 you should use ~3.4 which allows all versions up to 3.999 but does not include 4.0 and above. The ~ operator works very well with libraries follow semantic versioning.
Note: As a package maintainer, you can make the life of your users easier by providing an alias version for your development branch to allow it to match bound constraints.