What a version number means
Versioning is something that I am very passionate about and have spent a long time trying to come up with an easy to use versioning system. From what you have already said in your question it is clear that you have understood one important point, the assembly version numbers are not synonymous with the product version. One is technically driven, and the other is driven by the business.
The following assumes that you use some form of source control and a build server. For context we use TeamCity and Subversion/GIT. TeamCity is free for a small (10) number of projects and is a very good build server but there are others, some of which are completely free.
What a version number means
What a version means to one person may mean something different to another, the general structure is major, minor, macro, micro. The way I look at a version number is to break it down into two parts. The first half describes the main version (Major) and any key updates (Minor). The second half indicates when it was built and what the source code version was. Version numbers also mean different things depending on the context, is it an API, Web App, etc.
Major
.Minor
.Build
.Revision
Revision
This is the number taken from source control to identify what was actually built.Build
This is an ever increasing number that can be used to find a particular build on the build server. It is an important number because the build server may have built the same source twice with a different set of parameters. Using the build number in conjunction with the source number allows you to identify what was built and how.Minor
This should only change when there is a significant change to the public interface. For instance, if it is an API, would consuming code still be able to compile? This number should be reset to zero when the Major number changes.Major
indicates what version of the product you are on. For example the Major of all the VisualStudio 2008 assemblies is 9 and VisualStudio 2010 is 10.
The exception to the rule
There are always exceptions to the rule and you will have to adapt as you come across them. My original approach was based on using subversion but recently I have moved to GIT. Source control like subversion and source safe that use a central repository have a number that can be used to identify a particular set of sources from a given time. This is not the case for a distributed source control such as GIT. Because GIT uses distributed repositories that are on each development machine there is no auto incrementing number that you can use, there is a hack which uses the number of check-ins but it is ugly. Because of this I have had to evolve my approach.
Major
.Minor
.Macro
.Build
The revision number has now gone, build has shifted to where the revision used to be and Macro has been inserted.
You can use the macro how you see fit but most of the time I leave it alone.
Because we use TeamCity the information lost from the revision number can be found in the build,
it does mean there is a two step process but we have not lost anything and is an acceptable compromise.
What to set
The first thing to understand is that the Assembly Version, File Version and Product Version do not have to match.
I am not advocating提倡 having different sets of numbers but it makes life a lot easier when making small changes to an assembly
that doesn't affect any public interfaces that you are not forced to recompile dependent assemblies.
The way I deal with this is to only set the Major and Minor numbers in the Assembly Version but to set all the values in the File Version.
For example:
- 1.2.0.0 (AssemblyVersion)
- 1.2.3.4 (FileVersion)
This gives you the ability to roll out hot fixes which will not break existing code because the assembly versions do not match
but allow you to see the revision/build of an assembly by looking at its file version number.
This is a common approach and can be seen on some open source assemblies when you look at the assembly details.
You as the Team lead would need to be responsible for incrementing the minor number when ever a breaking change is required.
One solution to rolling out a required change to an interface but not breaking previous code is to mark the current one as obsolete废弃 and creating a new interface.
It means that existing code is warned that the method is obsolete and could be removed at any time but doesn't require you to break everything immediately.
You can then remove the obsolete method when everything has been migrated迁移.
How to wire it together
You could do all the above manually but it would be very time consuming, the following is how we automate the process. Each step is runnable.
- Remove the
AssemblyVersion
andAssemblyFileVersion
attributes from all the project AssemblyInfo.cs files. - Create a common assembly info file (call it VersionInfo.cs) and add it as a linked item to all your projects.
- Add
AssemblyVersion
andAssemblyFileVersion
attributes to the version with values of "0.0.0.0". - Create an MsBuild project that builds your solution file.
- Add in a task prior to the build that updates the VersionInfo.cs. There are a number of open source MsBuild libraries that include an AssemblyInfo task which can set the version number. Just set it to an arbitrary number and test.
- Add a property group containing a property for each of the segments of the build number. This is where you set the major and minor. The build and revision number should be passed in as arguments.
With subversion:
<PropertyGroup>
<Version-Major>0</Version-Major>
<Version-Minor>0</Version-Minor>
<Version-Build Condition=" '$(build_number)' == '' ">0</Version-Build>
<Version-Build Condition=" '$(build_number)' != '' ">$(build_number)</Version-Build>
<Version-Revision Condition=" '$(revision_number)' == '' ">0</Version-Revision>
<Version-Revision Condition=" '$(revision_number)' != '' ">$(revision_number)</Version-Revision>
</PropertyGroup>
Hopefully I have been clear but there is a lot involved. Please ask any questions. I will use any feedback to put a more concise blog post together.
What a version number means的更多相关文章
- UnsupportedClassVersionError: Bad version number in .class file
java.lang.UnsupportedClassVersionError: Bad version number in .class file造成这种过错是ni的支撑Tomcat运行的JDK版本与 ...
- java.lang.UnsupportedClassVersionError: Bad version number in .class file异常
java.lang.UnsupportedClassVersionError: Bad version number in .class file异常 部署工程时也出现过因为版本不同引起的问题,那时我 ...
- Bad version number in .class file
TY项目是用JDK1.6做的,早先在电脑上装了一个1.5的,这回就不能用了.为了能用,我就又装了一个1.6的,修改了环境变量之后,以为一切OK.开始测试,首先在Myeclipse中打开我用1.5编的一 ...
- oracle.jbo.JboException: JBO-29000: JBO-29000: Bad version number in .class file
我在本地run Page的时候报以下错误. oracle.jbo.JboException: JBO-29000: JBO-29000: Bad version number in .class fi ...
- The CompilerVersion constant identifies the internal version number of the Delphi compiler.
http://delphi.wikia.com/wiki/CompilerVersion_Constant The CompilerVersion constant identifies the in ...
- Java Bad version number in .class file
错误信息: java.lang.UnsupportedClassVersionError: Bad version number in .class file at java.lang.ClassLo ...
- Java 异常 —— Bad version number in .class file
把一个项目拷贝到另一个环境,运行时报错: Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class ...
- UnsupportedClassVersionError: Bad version number in...
在使用eclipse开发servlet可能会出现一个很麻烦事情,版本不一致错误. java.lang.UnsupportedClassVersionError: Bad version number ...
- java.lang.UnsupportedClassVersionError: Bad version number in .class file 解决办法
java.lang.UnsupportedClassVersionError: Bad version number in .class file 造成这种错误的原因是支撑Tomcat运行的JDK版本 ...
随机推荐
- winform 记录全局异常捕获
这篇文章主要是备用 记录winform程序捕获全局异常. /// <summary> /// 应用程序的主入口点. /// </summary> public static A ...
- 社区O2O,才是未来10年移动互联网最赚钱的项目
原文:http://blog.sina.com.cn/s/blog_70e76a920102uyoi.html 8月12日 上海 晴 从深圳回来后,一直和郭老师探讨一个问题:新媒体营销未来最大的市 ...
- Mozilla推荐的CSS属性书写顺序及命名规则
传说中的Mozilla推荐 /* mozilla.org Base Styles * maintained by fantasai */ /* Suggested order: * display * ...
- ASP.NET用户控件事件的定义和实践
假定用户控件(UserControl.ascx)中包含按钮控件 AButton,希望实现按 Button 按钮时,包含该用户控件的页面可以接收到事件. UserControl.ascx.cs ...
- javascript (js)中的基本概念
1. 基本数据类型 1.1 number (数字)在js中没有整形和浮点型的区分,所有的数字都是浮点型标识, 采用64位的浮点格式来表示数字.如果数字类型用在字符串连接表达式中,则会自动转换成字符串, ...
- json 处理
//String sssssString = "{"response":{"data":[{"address":"南京市 ...
- Chapter 4 持久存储数据对象
1.使用with open("filename.扩展名","r/w/rb/wb") as data代替data=open(..);data.close() 打开 ...
- HDU3487 Play With Chains(Splay)
很裸的Splay,抄一下CLJ的模板当作复习,debug了一个下午,收获是终于搞懂了以前看这个模板里不懂的内容.以前用这个模板的时候没有看懂为什么get函数返回的前缀要加个引用,经过一下午的debug ...
- codeforces 463D Gargari and Permutations(dp)
题目 参考网上的代码的... //要找到所有序列中的最长的公共子序列, //定义状态dp[i]为在第一个序列中前i个数字中的最长公共子序列的长度, //状态转移方程为dp[i]=max(dp[i],d ...
- iOS模型以及使用
个人习惯,也可以不这样写 创建模型基类: #import <Foundation/Foundation.h> @interface WJBaseModel : NSObject //将字典 ...