After learning and discussing to developers around me, I have some of my thoughts on open-source world and the more general one, the openness of the world. I will try to walk through some posts about this issue to discuss around those things. From now on, I will use open source software as a general term for open source software, library and framework. The viewpoint is quite based on start up environment.
What is open source?
Open source software is software that allows people to view the source code, to change, to modify or to link it (library, framework) with your software or system to build a new, bigger or better one. It really depends on the license of the open source that I will list and discuss some of them later.
Open Source Users’ benefit?
In short, it can be quoted by Newton:”If I have seen further it is only by standing on the shoulders of giants” (http://www.cippic.ca/open-source/). Open source software development embraces this principle.
- No buying cost => can try and fail then try another easily. (but it is not free, read the disadvantage part)
- When there is an error, everybody knows and tells it out.
- If you work with something really new, nobody else works on that before or no library reaching to the point that is acceptable to your application. You will know how much important it is to allow you to modify and extend a library. Famous companies will not take a big risk to go ahead in risky and new area to support you.
- Can be already tested well by the huge community if there is a bug, people can find it already for you, already posted a patch for you.
- Community Documentation is also a benefit when many people already asked and answered about the software.
Any risk or drawbacks?
- Not all the open source software is good. Those open source software require a lot of testing from community. You may sometimes take a big risk yourself. My team already experienced some stupid bugs from an open source library. There is no 100% guarantee. If you buy some service/framework/library, you can sue them for the bad quality.
- “Linux is free, if your time has no value” is correct no matter how you love Linux. You have to pay time for learning it, for testing the new library to make sure it runs like it is declared.
- Many open source software is really bad at documentation. Some people create open source software just for fun, so they sometimes are not expert, not professional and not responsible enough to document it well.
- The open source software can become out of date at sometime. When the authors start getting bored about their products and become too busy, they just don’t update it frequently. I have quite few experiences on open source software development, but I can see that all software need a leader, it can be an original author or can be any other people. It can be right that the whole community can contribute. However, if the software has no shared vision to grow or no people make sure that it keeps growing, it will become out of date soon
Licenses of Open Source
Now, I will move to the next part, which somebody may still misunderstand about it, the license. I will move from the most generous license to the strictest license. The license will really determine how we can use the open source software, varying from almost open like you can copy and redistribute it to really strict like you can only link to the library
Absolutely open, you can distribute, recreate, copy using whatever means you want.
Like public domain, but with a little bit more restriction: the name of its contributors is not allowed to be used to promote the software use the open source. Both of them have a little bit difference that you may want to read more yourself.
- GNU GPL General Public License
This one is like BSD and Apache but it is stricter. If you modify the copy/copies or a portion of it, use it or distribute it, your program MUST BE under the GNU GPL.
It is GPL but with less strict. It means, if you modify the program, you still have to distribute your work under the same license. However, if you just use the open source program like a library (which means you link to it by source and compiled code), you are allowed to distribute your program
References and additional Materials
Software Engineering Process and Tools lecture, Quang Tran