DO YOU WANT TO USE A VCS

Feb 13, 20141 like680 views

Short introduction about vcs & git usage. Aimed to introduce concept of version control system and git to people who didn't used git or vcs yet. Doesn't introduce deep part of git or operating policy for git. Just focus on simple introduction about main functionality and abstracted internal design.

DO YOU WANNA USE A VCS
SeongJae Park <sj38.park@gmail.com>

Software Is Alive: Keeps Changing
“How To Keep Software’s Moment?”

Life Of Files
FileB Changed

FileA ver 0

FileB ver 1

Life Of Files
FileA Changed

FileB ver 1

FileA ver 1

Life Of Files
FileB Changed Again

FileA ver 1

FileB ver 2

Software Is Alive: Keeps Changing
“How To Keep Software’s Moment?”
$ ls
0213_1st.tar
0239_2nd.tar.gzip
0305_final.zip
0307_final2.alz

VCS: Version Control System
Help Versioning, History Managing

VCS: Version Control System
Help Versioning, History Managing
Get Back Specific Version’s Software Anytime

CVCS vs DVCS
Centralized vs Distributed
Not Detail This Time…
Just Remember, CVCS is EVIL

git
Distributed Version Control System
Developed For Kernel SCM By Linus Torvalds
“Only wimps use tape backup: real men just upload their important stuff on ftp,
and let the rest of the world mirror it ;)” - Linus Torvalds

Just Remember: Cool Programmer Uses GIT

GIT, ALONE AND FREE
“Yes, I’m Alone, But I’m Alone And Free”
- Frozen -

git init: Create Repository
$ mkdir olaf && cd olaf && git init
`pwd` Is Now A Git Repository
Can Version Control Files Inside `pwd` Now

git add: Add Files Under Git’s Admin
$ echo “warmhug” > favor && git add favor
They Will Be One Of Version Later

git status: Show Git’s Admin Status
$ git status
$ echo “anna” >> favor
$ git status
Changed? Deleted? Be Conflicted?

git commit: Make Version
$ git commit -m “add warmhug as favor”
Already Added Files Are New Version, Now

git log: Show History
● Development Cycle
○ While(!blamed) {Analysis(); Develop(); Blame();}

Useful For Blaming ;)

git branch: Manage Branches
git branch;
git branch more_favor;
git branch;

git checkout: Move To Other Branch
git
git
git
git
git
git

checkout more_favor
branch
commit -am “add anna as favor, too”
log
checkout master
log

git checkout: Move To Commit
$ git checkout d8ec26
Branch Is Just Name Of Ref To Commit

Life Of Files Under Git, Internal

FileA ver 0

FileB ver 0

Life Of Files Under Git, Internal
git commit

commit 1

FileA ver 0

FileB ver 0

Life Of Files Under Git, Internal
HEAD

git branch

commit 1

FileA ver 0

FileB ver 0

master
branch

Life Of Files Under Git, Internal
HEAD

FileB Changed

master
branch

commit 1

FileA ver 0

FileB ver 0

FileB ver 1

Life Of Files Under Git, Internal
HEAD

git commit -a

commit 1

FileA ver 0

FileB ver 0

master
branch

commit 2

FileB ver 1

Life Of Files Under Git, Internal
HEAD

Change FileA, FileB
git commit -a
commit 1

FileA ver 0

FileB ver 0

commit 2

FileB ver 1

master
branch

commit 3

FileA ver 1

FileB ver 2

Life Of Files Under Git, Internal
HEAD

git checkout -b newbranch

commit 1

FileA ver 0

FileB ver 0

commit 2

FileB ver 1

master
branch

newbranch

commit 3

FileA ver 1

FileB ver 2

Life Of Files Under Git, Internal
HEAD

Change FileA
git commit -a
commit 1

FileA ver 0

FileB ver 0

master
branch

commit 2

FileB ver 1

newbranch

commit 3

commit 4

FileA ver 1

FileB ver 2

FileA ver 2

GIT IS AN OPEN DOOR
“We Can Fix This Hand In Hand”
- Frozen -

Communication Between Repos
Git Repositories Can…
Clone
Push Commits To
Pull Commits From
Each Others

Protocol Between Repos
HTTP://
HTTPS://
GIT://
SSH://
Even Usual File System

git clone: Clone Other’s Repo
$ git clone /home/elsa/olaf

git remote: Manage Remote Repos
$ git remote
$ git remote add origin /home/elsa/olaf

git push: Push Changes To Remote
$ echo “carrot” > noise && git add noise
&& git commit -am “add noise”
$ git push

git pull: Fetch & Merge Changes
May Cause Conflict In Some Scenario
Remember To Make Things Clean Before Push

Free GIT Repo Hosting Service
● GitHub
○ Popular Service
○ Money For Private Repository

● Bitbucket
○ Less Than GitHub, But Popular
○ No Money For Private Repository

FAQ: When Commit?
One Commit For One Logical Change

FAQ: How To Revert?
git reset --soft HEAD^

FAQ: How To Revert Silently?
$ git reset --hard HEAD^

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What You Can Do
To Test The Limit And Breakthrough

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DO YOU WANT TO USE A VCS

1. DO YOU WANNA USE A VCS SeongJae Park <[email protected]>

2. Software Is Alive: Keeps Changing “How To Keep Software’s Moment?”

3. Life Of Files FileA ver 0 FileB ver 0

4. Life Of Files FileB Changed FileA ver 0 FileB ver 1

5. Life Of Files FileA Changed FileB ver 1 FileA ver 1

6. Life Of Files FileB Changed Again FileA ver 1 FileB ver 2

7. Software Is Alive: Keeps Changing “How To Keep Software’s Moment?” $ ls 0213_1st.tar 0239_2nd.tar.gzip 0305_final.zip 0307_final2.alz

8. VCS: Version Control System Help Versioning, History Managing

9. VCS: Version Control System Help Versioning, History Managing Get Back Specific Version’s Software Anytime

10. CVCS vs DVCS Centralized vs Distributed Not Detail This Time… Just Remember, CVCS is EVIL

11. git Distributed Version Control System Developed For Kernel SCM By Linus Torvalds “Only wimps use tape backup: real men just upload their important stuff on ftp, and let the rest of the world mirror it ;)” - Linus Torvalds Just Remember: Cool Programmer Uses GIT

12. GIT, ALONE AND FREE “Yes, I’m Alone, But I’m Alone And Free” - Frozen -

13. git init: Create Repository $ mkdir olaf && cd olaf && git init `pwd` Is Now A Git Repository Can Version Control Files Inside `pwd` Now

14. git add: Add Files Under Git’s Admin $ echo “warmhug” > favor && git add favor They Will Be One Of Version Later

15. git status: Show Git’s Admin Status $ git status $ echo “anna” >> favor $ git status Changed? Deleted? Be Conflicted?

16. git commit: Make Version $ git commit -m “add warmhug as favor” Already Added Files Are New Version, Now

17. git log: Show History ● Development Cycle ○ While(!blamed) {Analysis(); Develop(); Blame();} Useful For Blaming ;)

18. git branch: Manage Branches git branch; git branch more_favor; git branch;

19. git checkout: Move To Other Branch git git git git git git checkout more_favor branch commit -am “add anna as favor, too” log checkout master log

20. git checkout: Move To Commit $ git checkout d8ec26 Branch Is Just Name Of Ref To Commit

21. Life Of Files Under Git, Internal FileA ver 0 FileB ver 0

22. Life Of Files Under Git, Internal git commit commit 1 FileA ver 0 FileB ver 0

23. Life Of Files Under Git, Internal HEAD git branch commit 1 FileA ver 0 FileB ver 0 master branch

24. Life Of Files Under Git, Internal HEAD FileB Changed master branch commit 1 FileA ver 0 FileB ver 0 FileB ver 1

25. Life Of Files Under Git, Internal HEAD git commit -a commit 1 FileA ver 0 FileB ver 0 master branch commit 2 FileB ver 1

26. Life Of Files Under Git, Internal HEAD git commit -a commit 1 FileA ver 0 FileB ver 0 master branch commit 2 FileB ver 1

27. Life Of Files Under Git, Internal HEAD Change FileA, FileB git commit -a commit 1 FileA ver 0 FileB ver 0 commit 2 FileB ver 1 master branch commit 3 FileA ver 1 FileB ver 2

28. Life Of Files Under Git, Internal HEAD git checkout -b newbranch commit 1 FileA ver 0 FileB ver 0 commit 2 FileB ver 1 master branch newbranch commit 3 FileA ver 1 FileB ver 2

29. Life Of Files Under Git, Internal HEAD Change FileA git commit -a commit 1 FileA ver 0 FileB ver 0 master branch commit 2 FileB ver 1 newbranch commit 3 commit 4 FileA ver 1 FileB ver 2 FileA ver 2

30. GIT IS AN OPEN DOOR “We Can Fix This Hand In Hand” - Frozen -

31. Communication Between Repos Git Repositories Can… Clone Push Commits To Pull Commits From Each Others

32. Protocol Between Repos HTTP:// HTTPS:// GIT:// SSH:// Even Usual File System

33. git clone: Clone Other’s Repo $ git clone /home/elsa/olaf

34. git remote: Manage Remote Repos $ git remote $ git remote add origin /home/elsa/olaf

35. git push: Push Changes To Remote $ echo “carrot” > noise && git add noise && git commit -am “add noise” $ git push

36. git pull: Fetch & Merge Changes May Cause Conflict In Some Scenario Remember To Make Things Clean Before Push

37. Free GIT Repo Hosting Service ● GitHub ○ Popular Service ○ Money For Private Repository ● Bitbucket ○ Less Than GitHub, But Popular ○ No Money For Private Repository

38. FAQ: When Commit? One Commit For One Logical Change

39. FAQ: How To Revert? git reset --soft HEAD^

40. FAQ: How To Revert Silently? $ git reset --hard HEAD^

41. FAQ: Howto @#$@!%^? Sorry, Next Time…

42. IT’s TIME TO SEE What You Can Do To Test The Limit And Breakthrough

DO YOU WANT TO USE A VCS

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