Git Github Tutorial 10: What is Pull Request?

Key Takeaways

hello friends in this tutorial we are going to see what is pull request and github on github owner can share his code with others now other person can look at the code and he can make changes to fix a bug or add an enhancement and then send a request to the owner to pull or merge his core changes into honors repository this request is called a pull request let us understand this by using this picture these four people on this github repo let's say this is the repository for node.js which is an open source project this guy here his name is Tom unless it Tom looks at node.js code base and then he realizes that he needs to fix a some bug or make sanim and enhancement now since this is an open source project he can copy the project into his local github private repository then pull the project on his local computer make core changes so this blue color indicates the coaching that he made and then he can push that into his own private github repository after that he can create a pull request or asking owners to pull his core changes into owners repository when this request is sent owners can see the difference which is this blue color line code change and they can either comment or they can just accept the request directly so pull request allows you to start a conversation around that code change between the owners and between the code contributor so this promotes of collaboration and pull request is one of the reasons why github has become very popular ok now let's look at the demonstration so let's say we have these two users Brad and Angelina are who not only collaborate as a wife and husband or actors but they want to do a collaboration when it comes to programming as well so this guy has this code repository called hungry and he has all this code now if you look at the URL that is Brad 27th oh so this is owned by Brad ok now Angelina looks at this codebase and she wants to let's say make some changes here so she will then go and so the person right here is Angelina so she will open odd this repository here so as you can see here the signed-in user is Angelina but she has opened the repository from Brad and she can click on this fork button to copy Brad's code into her own private repo ok so now she has Corbis copied and now you can see that is the links is Angelina ok so typically she will pull the if the code changes are huge civil pull this code base into her local computer and make code changes run the code and do some test verified and once things look ok she will push it here to her own private repository but since this is a tutorial I am going to make code change directly on this web website so if you don't know our github allows you to edit code directly on the website so I will just click on edit file and make a code change here and I will and hungry equal to Y so she wants to add Y as a valid input okay so let me make this bigger so that you can see what Co change I made so she just added this line okay and then she can commit her changes you can say okay added Y as a valid answer and commit changes so once you do that and if you go to your commits you can see the difference here by clicking here so it says you added this thing here okay now it is the time to create a pull request so Angelina is ready with her chord changes now she wants to merge these chord changes here in to Brad's repository so for that she will click on pull request here okay and then let's see so here there is a button new pull request so click on new pull request so here it will tell you from where you are merging to which repository so your base the repository is Brad 27 so this says that from Angelina hungry a code repository master branch I want to merge into brass repository okay and it allows you to see the difference so if I am Angelina Angelina can see that I am asking to add this coaching okay so I'll click on create pull request here you can add some meaningful comment here and then just say create pull request so at this point the Corps from here it's not merged here okay so now Angelina is kind of waiting for Brad to review his whole code okay so if I am Brad I will are in this area if I just refresh my webpage I will see this little notification okay and this notification is telling me that let me maximize the screen so this notification is not telling me that uh someone has sent me a pull request so I will click here and if I want to see the actual cogeco changes I can go here in file chain and I can see the code changes now I'm Brad let's say and I like this call change but then one thing is I want to add capital y as an input so I will put a comment saying that a good change I like it can you also add capital y ah so then you will put your comment here and once you put your command now let's go back to Angelina because the ball is in Angelina's code now okay and once she opens this pull request see will see a comment from Brad twenty-seven saying that good change I like it can you also add y ok so now what Angelina will do is she kind of agrees with bad so she will go ahead and add Y as well so let's see so here I'm in this pull request ok just a second okay sorry so I'm looking at Brad scores okay I shouldn't be so this is bad suppository okay let me go back so Angelina should be looking at her repository which is hungry okay so here what she will do is she will add capital y as a valid input so we'll say okay and hungry equal to capital y then that also is a valid input added capital y into list of valid answers okay she will commit her core change and let's look at the full request okay so the pull request will be here okay so now you can see here that there is added wine to list of valid answers and if you look at this files change now I have both of this available in my pull request okay so if I am bread I will also again get a notification saying that Angelina Argosy there is a notification here saying that there is some update on this pull request so you can view the Jean that was made last time or view you can view all the changes so now this change kind of looks okay to me and I'm fine merging it into my depository so what I will do is I will go here and I will click on merge button okay eventually you will click on merge button to merge it so now what happened is in brass repository I have now d score changes so this completes the cycle and now I have Brad and Angelina both showing up as a decor contributor okay so that was just a nice quick demo of pull request they are extremely popular in open source world where there is a open source project and multiple people contribute to it okay and this whole model of pull request and sharing code is number one reason why github is so popular