Basic git-commands

Basic

Commands

insanehong@KGUG2014. 12. 20

NAVER / NAVER LABS

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email : insanehong@gmail.com

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Why do programmers use or recommend

macs or linux?

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! .

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Try git better, together

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.

Great a Git repository

git init This command creates an empty git repository

- https://www.kernel.org/pub/software/scm/git/docs/git-init.html -

git

$> git init

$> git init

/workspace

$> git init git-study && cd git-study Initialized empty Git repository /workspace/git-study/.git/

/git-study.git

/git-study.git

Repository Structure

Working tree

index (Staging area)

object database

Working area

Cache storage Storage

Working tree

index (Staging area)

object database

git add git commit

!

What is commit?

In computer science and data management, a commit is the making of a set of tentative

changes permanent.- http://en.wikipedia.org/wiki/Commit_(data_management) -

Git ?

Git commit !

Untracked Staged Committed Modified

Tracked

git add git commit edit file

git add

file

Be committed to doing

/git-study.gitcompress.js

http://git.io/Tq59Hw

Working tree

index (Staging area)

object database

git add git commit

git add This command updates the index using

the current content found in the working tree, to prepare the content staged for the next commit

- https://www.kernel.org/pub/software/scm/git/docs/git-add.html -

working directory

$> git add

$> git add -a

Two!

?

git status Displays paths that have differences between the index

file and the current HEAD commit, and paths in the working tree that are not tracked by git

- https://www.kernel.org/pub/software/scm/git/docs/git-status.html -

Woking directory .

$> git status

$> git status -s

$> git status On branch master

Initial commit

Untracked files: (use "git add ..." to include in what will be committed)

compress.js

nothing added to commit but untracked files present (use "git add" to track)

$> git status -s ?? compress.js

/git-study.gitcompress.js

$> git add compress.js $> git status On branch master

Initial commit

Changes to be committed: (use "git rm --cached ..." to unstage)

new file: compress.js

$> git status -s A compress.js

Working tree

index (Staging area)

object database

git add git commit

git commit Stores the current contents of the index in a

new commit along with a log message from the user describing the changes.

- https://www.kernel.org/pub/software/scm/git/docs/git-commit.html -

/git-study.gitcompress.js

$> git commit -m [master (root-commit) 5525f5f] 1 file changed, 28 insertions(+) create mode 100644 compress.js

$> git status On branch master nothing to commit, working directory clean

5525f5f

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

Untracked

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

blobfunction compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

81b90e8

Staged

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

blobfunction compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

tree

81b90e8

3cfa7a2

compress.js 81b90e8

commit 5525f5f

tree 3cfa7a2

author insnae 1330482646 +0900

commiter insnae 1330482646 +0900

Commited

?

$> node compress hello world, hello git > hel2o world, hel2o git helloooooooo > hel2o

!

https://www.flickr.com/photos/slworking/8739080572

?

helloooooooo> hel2o

currently

helloooooooo> hel2o8

Goals

8 if( str.charAt(i) === prev ) { 9 repeat++; 10 if ( i === str.length -1) result+=repeat; 11 } else {

Solution

8 if( str.charAt(i) === prev ) { 9 repeat++; 10 if ( i === str.length - 1 ) result += repeat; 11 } else {

header 1 /* 2 Author insanehong 3 LICENSE under BSD 4 */

git diff Show changes between the working tree and

the index or a tree, changes between the index and a tree, changes between two trees, or changes

between two files on disk..- https://www.kernel.org/pub/software/scm/git/docs/git-diff.html -

working directory index $> git diff

$> git diff ..

index HEAD $> git diff --staged

/git-study.gitcompress.js

$> git diff diff --git a/compress.js b/compress.js index 81b90e8..46c3d6e 100644 --- a/compress.js +++ b/compress.js @@ -7,6 +7,7 @@ function compress(str) {

if( str.charAt(i) === prev ) { repeat++; + if ( i === str.length -1) result+=repeat; } else { if (repeat > 1) result+=repeat; result+=str.charAt(i);

5525f5f

/git-study.gitcompress.js

$> git add compress.js $> git status -s M compress.js

$> git commit -m [master f5cd615] 1 file changed, 1 insertion(+)

5525f5f

f5cd615

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; if ( i === str.length - 1 ) result += repeat;

} else { if (repeat > 1) result += repeat; result += str.charAt(i); repeat = 1; }

prev = str.charAt(i);

}

console.log(str, ' > ', result);

}

var test1 = "hello world, hello git"; var test2 = "helloooooooo";

compress(test1); compress(test2);

compress.js

function compress(str) { var repeat = 1; var result = str.charAt(0); var prev = result;

for( var i =1; i < str.length; i++ ) {

if( str.charAt(i) === prev ) { repeat++; } else { if (repeat > 1) result += repeat; result += str.charAt(i);