Github git

SSH Keys

Push/Pull with SSH key

You'll need to change the github URL you are using.

git clone https://github.com/<Username>/<Project>   # !!bad!!

git clone git@github.com:<Username>/<Project>       # good
git clone github.com:<username>/<project>           # also good (must specify user in ~/.ssh/config)

You can quickly test authentication

ssh git@github.com -i ~/.ssh/github

Deploy Keys

you can generate keys to provide read-only, or read-write access to a repo.

ssh-keygen -t ed25519   # a strong key

https://github.com/<you>/<repo>/settings/keys/new   # url to add new deploykey

next we'll create entries within our ssh config for the repo.

Create an `alias` for github.com, that will identify which deploykey you'll be using here.

Host <alias-for-your-repo>  github.com
    HostName github.com
    IdentityFile  /home/you/.ssh/deploykey
    User git

Finally, clone the git repository using your alias instead of github.com.

git clone <alias-for-your-repo>:<you>/<repo>

NOTE:

Your alias must be a word, not a full address. Some examples:

• git will not recognize myrepo:/you/myrepo as an alias
• your alias cannot resolve to your repo ex: git clone {alias} is not sufficient. You will need to use git clone {alias}:you/repo.

Workflows

Importing existing repo

See hosting a git http server to share with github.

You can then use that to import your project.

Download single file

curl -O wget https://raw.githubusercontent.com/user/project/branch/filename

Find PR from commit

git log --merges --ancestry-path --oneline 9c34e5f6af..master \
    | grep 'pull request' \
    | tail -n1 \
    | awk '{print $5}' \
    | cut -c2- \
    | xargs gh pr view -w

alternatively

git describe --all --contains <commit>  # returns branch name