----BEGIN CLASS---- [13:29] #startclass [13:29] Roll Call [13:29] Shiva Saxena [13:29] Sehenaz Parvin [13:29] Muhammad Zeeshan Qazi [13:29] Naman Sharma [13:29] Kumar Vipin Yadav [13:29] tabrez khan [13:29] Aditya Patil [13:29] Vivek Shukla [13:29] Anu Kumari Gupta [13:29] Priyanka Sharma [13:29] Priyanka Saggu [13:30] Saptak Sengupta [13:30] pooja sulakhe [13:30] Manank Patni [13:30] Kuntal Majumder [13:30] Kazi Mehbbob Zaman [13:30] Rohan Vivek [13:30] Pawan [13:30] Jitendra Kumar Tripathi [13:30] Pooja kumari singh [13:30] Sandeep Kumar Choudhary [13:30] Ved_Sinha [13:30] Jagannathan Tiruvallur Eachambadi [13:30] Avik Mukherjee [13:30] Shruti Dash [13:30] Shashank Kumar [13:30] thebigj: hello [13:30] Prabhu Sharan Singh [13:30] Gajendra Saraswat [13:30] Prashant Sharma [13:30] Shivam Bansal [13:30] Akshay Gaikwad [13:30] Rakshit Airani [13:31] Vaibhav Tripathi [13:31] Bhavin Gandhi [13:31] Ananyo Maiti [13:31] priyam das [13:31] Aditya Deshpande [13:31] Sahil [13:32] Ola Ajayi [13:32] Piyush Aggarwal [13:32] Pradhvan Bisht [13:32] Shubham Sharma [13:32] Neeraj Kumar Arya [13:33] Sayani Bhattacharjee [13:33] O' [13:33] I'll wait for another 2 mins for folks to join in [13:33] Rajat Gupta [13:34] Till then I will set some ground rules for the session [13:34] Vishal Kushwaha [13:34] Nobody asks question until I've asked [13:34] I will write a few lines, then after I will ask if you have questions [13:35] then you can go ahead and ask questions [13:35] Mayank Singhal [13:36] Ratan Kulshreshtha [13:36] Abhay SIngh [13:36] #questions off [13:37] So, I am starting off with the session of Git [13:37] git ??? not tor ? [13:37] *- One fine day, you plan to start a project of yours. [13:37] *- But maintaining and building a project is nevertheless a daunting task [13:37] *- You dream that your project would be a big & successful project. [13:38] *- A community of people are be using your project. [13:38] *- But, you are just a developer and at the end of the day a human. [13:38] *- You are ought to make mistakes, forget corner cases, make bunch of typos. [13:38] *- and all the other issues that you never even thought of. [13:38] *- But, that's when the community comes to rescue. They start filing up issues. [13:38] *- You solve them one by one. But. slowly, slowly, slowly. [13:39] *- Your issues counter has reached 1000. [13:39] *- Would you be celebrating this milestone? If I were you. I would be tensed. [13:39] * end of prologue * [13:39] Roll call:karan pratap [13:39] everything good till now? [13:39] sayan, yes [13:39] Yes [13:39] Yes [13:39] yea [13:39] yes [13:39] Yes [13:39] yes [13:39] Yes [13:39] yes [13:39] yes [13:39] yep [13:39] yes [13:39] yes [13:39] +1 [13:39] yes [13:39] yes [13:40] Yes [13:40] Yes, sayan [13:40] No [13:40] yes [13:40] yes [13:40] sayan: yup [13:40] yup [13:40] What he asked ? [13:40] yes. [13:40] yes [13:40] yes [13:40] great, then moving ahead ignoring saptaks [13:40] Rollcall:Siddharth Sahoo. [13:41] rolcall:farhan_shaikh [13:41] yes [13:41] yes [13:41] *- There so much work years to spend just to fix those pending issues. [13:41] Yes [13:41] *- You wished you had a helping hand and the community who were just filing the issues [13:41] *- with comments "How can we help?" could just come and help you out. [13:41] Rollcall:nupur kapur [13:42] *- And with a tensed mind, you mistakenly forcefully delete an important chunk of code. [13:42] *- *And your nightmare dream sequence breaks* [13:42] *- Sweating profusely, You thank your god for the blessing in disguise. [13:42] *- You take an oath for each of your project you will be using a Version Control System a.k.a VCS [13:42] Sourabh Pruhti [13:42] sayan sorry for being late [13:42] *- And from here the journey of using the VCS starts for you [13:43] *- *Chapter 1: Understanding VCS: Commits* [13:43] *- Next day morning you start reading VCS, scratching your head to get around with all the terms [13:43] *- The first one that you hit is commits, so what is commit (or snapshot?) [13:43] *- So you thought of writing a series analogy stories to learn the concepts better :) [13:43] *- You create a new character, Tux [13:43] *- Tux wants to be photographer, who has just bought a new DSLR. [13:44] *- Tux plans to be the next travel photographer, who would take the best picture from the top of Mt. Everest [13:44] *- But Tux is a newbie, so Tux starts watching for YouTube tutorials for learning to post process the images. [13:44] *- Tux creates a directory named *working* to put all un-processed images. <<-- mind *working* is to be focused here [13:44] *- Then, fires up DarkTable to process the images. [13:45] *- Every time after a set of similar operations (like crop & rotate, shadows & highlights, etc), Tux creates a copy of the *working* directory and names it `snapshot-{n}` [13:45] *- After a couple of operations, Tux stands having "snapshot-1", "snapshot-2", "snapshot-3", .... , "snapshot-100" directories [13:45] *- This directories is history of how Tux developed the image over time. At any point, Tux can go back to a given snapshot and build again on top of it [13:46] Any questions till here? [13:46] Nope! [13:46] sayan, no [13:46] ! [13:46] No sayan [13:46] no [13:46] sayan, no [13:46] nope [13:46] No [13:46] no [13:46] NO [13:46] ! [13:46] no [13:46] ! [13:46] no [13:47] sayan What does post process means ? [13:47] #questions on [13:47] No [13:47] next [13:47] ! [13:47] next [13:47] ! [13:47] Tux creates a directory everytime with an update (a small update). Wouldn't it occupy a lot of space? [13:48] prabhu: Yes, it does. But keep in mind this is a analogy story to explain Git [13:48] next [13:48] I didn't understand the part about snapshot(n). What's the difference between snapshot{1}, snapshot{2} and so on? [13:49] so Tux clicked an image, after that he start post-processing that is "increasing brightness, changing colors" etc [13:49] after each operation Tux creates a new directory [13:50] so maybe snapshot{1} contains image with increasing brightness [13:50] ! [13:50] and then snapshot{2} contains changing colors [13:50] next [13:51] I think I will pass [13:51] cool [13:51] anymore questions? [13:51] It is specific to Git [13:51] ananyo: sure, ask in when I am doing the hands-on [13:51] going ahead then [13:52] *- *Chapter 2: Understanding VCS: Staging Area* [13:52] Will ask at the end of session but related to your snapshot example [13:52] *- It's been a month now, Tux have learned a lot on post-processing images. [13:52] *- Tux now mixes and matches multiple images file to create a snapshot directory. [13:52] *- One day, Tux while processing the images, goes into experimental mode. [13:53] *- and only after a while realized that the changes should be going into two [13:53] *- different snapshot directories (`snapshot-139` & `snapshot-140`). [13:53] *- Smart Tux quickly thought of an idea, creates a new staging directory. [13:53] *- A staging directory works as an intermediate between the working directory [13:53] *- and the snapshot directory. [13:53] *- So, Tux now works on working directory, and one Tux is happy with the changes [13:53] *- Tux moves all changed files into staging directory, and then creates a copy of the staging directory as new snapshot directory [13:54] any questions till here? [13:54] sayan, no [13:54] no [13:54] N [13:54] no [13:54] No [13:54] no [13:54] nope [13:54] No [13:54] no [13:54] no [13:54] no [13:54] no [13:54] no [13:54] no [13:55] ! [13:55] no [13:55] next [13:55] why should changes be oing into two different directories? [13:56] Tux is suppose working on 3 different files [13:56] and wants just to create snapshot directory of 2 files [13:56] no [13:57] copying the working directory to snapshot will copy all 3 file changes [13:57] so he got this idea to create this intermediate directory where he copies this two files and names the directory staging [13:57] and then copies staging to snapshot [13:58] any questions? [13:58] ! [13:58] if not, fire up the terminals [13:58] next [13:58] Tell me when done [13:58] sayan, so he will send the two files to the staging directory. So he won't work on them anymore? [13:58] sayan, done [13:59] done [13:59] I hope you all have git installed [13:59] done [13:59] done [13:59] yes sayan [13:59] prabhu: he copies those two file to staging, not move [13:59] yes [13:59] sayan, he doesn't send the third file as he still wants to work on that? [13:59] yes [14:00] Done [14:00] prabhu: yes [14:00] sayan, got it. thanks [14:00] sayan, yes, git installation done [14:01] *- People who do not have their username and email setup done [14:01] *- Do this git config --global user.name "" [14:01] *- git config --global user.email "" [14:01] for example, for me it would be [14:01] git config --global user.name "Sayan Chowdhury" [14:01] git config --global user.email "gmail@yudocaa.in" [14:02] done? [14:02] yes [14:02] Yes [14:02] yes [14:02] Yes [14:02] yes [14:02] Yes [14:02] yup [14:02] yep [14:02] next lets go ahead and create a directory [14:03] for this session [14:03] yes [14:03] mkdir hellouniverse [14:03] yes [14:04] sayan, done [14:04] done [14:04] yes [14:04] Done [14:04] ! [14:04] done [14:04] done [14:04] done [14:04] done [14:04] *- cd hellouniverse [14:04] done [14:04] sayan, done [14:04] done [14:04] Done [14:05] done [14:05] sayan, done [14:05] done [14:05] Done [14:05] done [14:05] *- vim helloworld.txt [14:06] sayan, done [14:06] done [14:06] done [14:06] done [14:06] *- Remember I am adding *- at the beginning so that it's easier for people to distinguish the messages that are from me [14:06] *- simply save & exit the file [14:06] Ok sanyan [14:06] sayan, thanks for doing it. It's a great strategy to even to read the logs later. [14:06] done [14:07] *- using :wq [14:07] sayan, done [14:07] Done [14:07] ::wq::done [14:07] *- now try the command git status [14:08] *- you will see an error [14:08] *- right? [14:08] not a git repo [14:08] gityes [14:08] sayan, Do we need to write something on the txt file. Then use :wq ? [14:08] yes [14:08] not a git repo [14:08] siddharth: no, just a blank file [14:08] :wq [14:08] *- yes, so the current directory is not a git repo yet. so it gave a fatal error [14:08] sayan, right [14:08] sayan, we didn't do git init [14:08] not a git repo [14:09] *- so to make it a git repo we do git init [14:09] v16k_, please don't introduce some commands which are yet to be told. [14:09] sayan, done [14:09] *- now if you do git status [14:09] prabhu, ok [14:10] sayan, untracked files [14:10] untracked files [14:10] *- you will see the file helloworld.txt under untracked files [14:10] sayan, yes [14:10] *- which means Git is not tracking this files right now [14:10] yes [14:10] *- there could be many files under this section [14:10] ! [14:10] *- for now we just have one [14:10] yes [14:11] *- But any changes to these file wont be tracked by Git [14:11] next [14:11] sayan, what do you mean by tracking? [14:11] i was just asking for the error while configuring [14:11] viviy [14:11] git config --global "Sarques" [14:11] error: key does not contain a section: Sarques [14:11] sorry [14:11] sayan ^ [14:12] Sarques, you forgot user.name [14:12] Sarques: did you read the lines correctly? [14:12] Sarques: you forgot something [14:13] okay sorry, i thought "name" if for placing at user.name [14:13] thanks ,eom> [14:13] Sarques: cool, np [14:15] *- So, git has various configurations [14:15] *- And you can set them via the terminal [14:15] *- this can be set using the git config sub command [14:16] ! [14:16] *- user.name and user.email are two keys for which you are setting the value [14:16] *- So when I do git config --global user.name "Sayan Chowdhury" [14:16] *- Sayan Chowdhury is the value set for user.name globally [14:17] next [14:17] pass [14:17] next [14:17] sayan To use git do we need a internet connection or it works off-line too ? [14:17] ! [14:18] siddharth: there are VCS which require you to be online, but git works offline [14:18] next [14:18] sayan, Git and GIthub ? Both are the same or different ? [14:18] ! [14:19] next [14:19] It is untrack because it is in working dir? [14:19] github is a frontend to implement git [14:19] git is the actual VCS [14:19] ! [14:19] git or svn or whatever [14:19] shadowroot: please don't answer out of turn questions [14:19] How is mirroring achieved in ot? [14:19] *tor [14:20] prokbird: no, you will understand what is working directory is later [14:20] prokbird: I'll get to it [14:20] Souvik: this is not the Tor session [14:20] sayan, ok [14:20] sayan: anyone can answer yea ? [14:20] shadowroot: anyone can anwer but siddharth asked out of turn [14:21] ohh sry [14:21] When is the tor session? [14:21] i didn't know that [14:21] sorry* [14:21] next [14:21] sayan, I don't know whether it will be explained later. So, what is the difference between "global", "system" and "local" config file? [14:21] shadowroot: read the rules. You have been breaking them everytime you show up [14:22] sayan, I was on my turn.Check it once again.You didn't let me ask completely.I didn't added any . [14:22] siddharth: You don't ask multiple questions all at once [14:22] sayan, Then what the importance of ? [14:22] prabhu: no, I will not explain that in this session. but after the session I can [14:23] sayan, okay [14:23] ! [14:23] sayan, I found it using git config and got curious. [14:24] sayan, If you saying I did a mistake. I am apologetic and it won't happen again. [14:24] siddharth: means that the questions you asked has been cleared [14:24] nex [14:24] next [14:24] When is Tor session? [14:24] Souvik: read the email [14:24] sayan, That's what I am saying I was not clear then. [14:24] moving ahead [14:25] siddharth: if you have two very unrelated questions, you raise hand twice [14:25] that does not mean I press ! in two quick succession [14:25] sayan, Okay. [14:25] the aim is that everybody gets a chance [14:25] moving ahead [14:26] *- so to make git track your files you use the command git add [14:26] *- do git add helloworld.txt [14:26] sayan, It won't happen again.I understood the rules.Let's continue the session. [14:26] *- now do git status [14:26] ! [14:27] sayan, warning when doing git add [14:27] sayan, hello.txt Changes to be committed [14:27] changes to be commited [14:27] prabhu: What warning? [14:27] commited, new file: helloworld.txt [14:27] sayan, LF will be replaced by CRLF. What is this about? [14:28] sayan, I meant a warning is showing by git [14:28] showing/shown* [14:28]