Interstellar Git Hacker-rank Hands-On Solutions

 Interstellar Git Hands-On Solutions

The Course Id of Interstellar Git is 61738.

1. Try it out: Cherry-Pick

cd test/

ls

cat greetings.sh

git checkout username

git log --pretty=oneline

git checkout master

git cherry-pick e0b8133a455874c673c3c41e3387b12b9560dd32

2. GIT STASH

cd file/

vi calc.py

Press i for INSERT then type below code

sum = float(num1) + float(num2)

+diff = float(num1)-float(num2)

=mul = float(num1) * float(num2)

+div = float(num1) / float(num2)

Esc -> :wq -> Enter

git stash (saved working directory)

vi calc.py

num1 = input('Enter first number: ')

num2 = input('Enter second numbr: ')

git add .

git commit -m 'STEP 4' (1 file changed)

git push origin master

git tag -a v1.0 -m "first"

git stash list

vi calc.py

[Press i]

print('The sum of {0} and {1} is {2}'.format(num1, num2, sum))

+print('The difference of {0} and {1} is {2}'.format(num1, num2, diff))

+print('The product of {0} and {1} is {2}'.format(num1, num2, mul))

+print('The division of {0} and {1} is {2}'.format(num1, num2, div))

[Press ESC and type :wq]

git add .

git commit -m "step 7"

git tag -a v2.0 -m "second"

git push origin master

3. GIT BLAME

cd local/

ls

cat newfile.py

vi newfile.py

print('Hello World!!!')

This is the second line!

This is the third line!

a = 10+20

print(a)

git add .

git commit -m 'added two lines as step 2"

git push origin master

git blame newfile.py

touch output.txt

vi output.txt

This is the second line! (press i and type the line later ESC + :wq]

4. GIT Submodule 

cd file/

mkdir vendor

cd vendor/

git submodule add /projects/challenge/.assessment/2

git status

git add .

git commit -m "on step2"

git push origin master

cd 2

vi dependency1.py

[press i and give space then ESC + :wq]

git add .

git commit -m "new line added"

git submodule status

cd ..

git status

git log --oneline

git add .

git commit -m "complete step3"

git push origin master

5. GIT REFLOG

cd file/

ls

touch file4.py

vi file4.py [:wq and press enter]

git add .

git commit -m "New file added"

git push origin master

git reflog

git reset --hard Head~1

git reflog

git cherry-pick a297431 (commit id of New file added)

git reset --hard

6. GIT HOOKS

cd test/

cd .git/hooks/

touch post-commit

vi post-commit

git push origin master [ESC + :wq enter]

chmod +x post-commit

cd ..

cd ..

touch new_file.txt

git add .

git commit -a -m "commitMessage"

7. GIT BISECT 

cd local/

ls

cat newfile.py

git log --oneline

git bisect start

git bisect good 72c7e9d (perform addition)

git bisect bad

cat newfile.py

git bisect bad

cat newfile.py

git bisect good (when you see b = 20)

git bisect reset

git revert 317f20..... (commit id above you will see) [Ignore Errors]

git commit -u newfile.py ( Nothing just type :wq and Enter]

git add .

git commit -m "revert"

git push origin master