git

Git is a distributed version control software system that is capable of managing versions of source code or data. It is often used to control source code by programmers who are developing software collaboratively.

git commands

command to add a modified file or directory
```
git add filename-or-directry-name
```
Command to add all modified file
```
git add -u
```
Command to commit
```
git commit -s
```
Command to checkout multiple modified file
```
git status | grep modified | sed 's/^.*modified:   //' | xargs git checkout
```
Note: check space between modified: and //
Command to remove white space and cleanfile in all modified file
```
git status | grep modified | sed 's/^.*modified:   //' | xargs ./cleanfile
```
Note: cleanfile is a script present in current folder.
Command to push in specific brance with review
```
git push origin HEAD:refs/for/dev1.0
```
Note: origin means head(main) branch and dev1.0 is current brench where we want to push
Command to checkout specific commit
```
git checkout commit-hash
```
Command to create new branch
```
git checkout  -b new_branch_name
```
To delete a git branch
```
git branch -d branch_name
```
create git patch from commit
```
git format-patch -n
```
Note: where n is number of commit, each commit will generete a patch file

Apply a git patch generated by git format-patch

git apply --stat a_file.patch
git apply --check a_file.patch
git am --signoff < a_file.patch

configure user information

git config --global user.name "Your name"
git config --global user.email "Your email id"
git config --global branch.autosetuprebase always
git config --global color.ui true
git config --global color.status auto
git config --global color.branch auto
git config --global core.editor vim
git config --global merge.tool vimdiff
git config --list

To clone git repositery first time use

git clone https://github.com/user/Repo-name

add new file
- add new file
```
git add <filename>
```
- now check status of newly added file
```
git status
```
- then use commit to update added file using command
```
git commit -m "your comment"
```
Now the new file is ready to push, use above push command
delate file
```
git rm filename
```

to undo the delate file

to find a deleted file and its commit

git log --diff-filter=D --summary                  # all deleted files ever
git log --diff-filter=D --summary ./               # all deleted files in cwd 
git log --diff-filter=D --author=Batman --summary  # all files deleted by Batman

for undo
```
git checkout <commit>~1 <filename>
```

to checkout only one file
```
git checkout -- filename
```
to create patch or current changes
```
git status > filename.patch
```
to apply patch
```
git apply filename.patch
```
To modify the chanages in last commit
```
git commit --amend
```

development tools guide

git

git commands