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Git

Tools

Setup

Basics

Set global user name and email (remove --global flag for specific repo only):

git config --global user.name "0xfab1"
git config --global user.email "f@bi.an"

View current config: git config --global --list

Setup SSH login

Create new key

ssh-keygen -t ed25519
Check if service is running and add key
eval "$(ssh-agent -s)"
ssh-add ~/.ssh/id_ed25519
ssh-add -l

Copy this to github

cat ~/.ssh/id_ed25519.pub

Test connection to github

ssh -T git@github.com

Test to clone, commit and push on a repo

git clone git@github.com:FullByte/git-test.git
cd git-test/
nano script.sh
chmod u+x script.sh
git add script.sh -f
git commit -m "adding script"
git push

Commands

  • Get all authors: git log | Where { $_ -match "Author" } | Select-Object -unique
  • Download a specific branch: git clone -b dependabot/npm_and_yarn/pug-3.0.1 https://github.com/microsoft/project-nodejs-express-webapp/

Clean up

  • Delete all the objects w/o references: git prune --progress add --dry-run for a test
  • Aggressively collect garbage: git gc --aggressive

Remove Tags

Run this in your local repository of which you want to remove a tag/tags:

git fetch
git tag
git tag -d {tag-name}
git push origin :refs/tags/{tag-name}

.gitignore

Git ignores .gitignore with .gitignore in .gitignore

Init a new repository and added a .gitignore file containing ".gitignore" to instruct git to igntore the .gitignore file. Example:

git init .
echo ".gitignore" > .gitignore
git status

Result:

On branch trunk
No commits yet
nothing to commit (create/copy files and use "git add" to track)

Pretend to be busy

Do this on a clean machine

git config --global user.email "f@bi.an"
git config --global user.name "Busy Bee"

Clone an empty new repostory e.g.:

git clone https://github.com/FullByte/git-test
cd git-test

Run the script to create a commit for every day... e.g. since 1999.

nano script.sh
chmod u+x script.sh
./script.sh
script.sh

``` sh for Y in {2018..2020} do mkdir Y cd Y for M in {01..12} do mkdir M cd M for D in {01..28} do mkdir D cd D for i in {01..12} do echo "i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-M-M-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-M-M-D 12:D 12:i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-M-M-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="i on i on M/D/D/i on i on M/D/D/Y" > commit.md export GIT_COMMITTER_DATE="Y" > commit.md export GIT_COMMITTER_DATE="Y-Y-M-M-D 12:D 12:i:00" export GIT_AUTHOR_DATE="Y-M-D 12:i:00" git add commit.md -f git commit --date="Y-M-D 12:0i:00" -m "$i on $M $D $Y" done cd ../ done cd ../ done cd ../ done git push

optional: delete stuff

git rm -rf 20**

git rm -rf 19**

git commit -am "cleanup"

git push

```