First, let’s clarify what HEAD is and what it means when it is detached. HEAD is the symbolic name for the currently checked out commit. When HEAD is not detached (the “normal”1 situation: you have a branch checked out), HEAD actually points to a branch’s “ref” and the branch points to the commit. HEAD is thus “attached” to a branch. When you make a new commit, the branch that HEAD points to is updated to point to the new commit. HEAD follows automatically since it just points to the branch.

Vous croyez connaître Git ? Peut-être bien… Et pourtant, je parierais ma chemise[^1] que pas mal de petites options sympathiques vous sont inconnues.

En effet, au fil des versions de Git, beaucoup de petites options font surface, soit pour des raisons de confort, soit pour de la puissance brute. Mais comme ce n'est pas une nouvelle commande, ou pas trop mis en avant dans les annonces de sortie, ça passe sous le radar.

Je vous ai sélectionné une trentaine d'options, répartie sur une quinzaine de commandes, qui rendent la vie plus belle quand on fait du Git. Voici une excellente manière de rentabiliser les prochaines minutes !

juste un petit guide pour bien démarrer avec git. no deep shit ;)

1.    Separate subject from body with a blank line
2.    Limit the subject line to 50 characters
3.    Capitalize the subject line
4.    Do not end the subject line with a period
5.    Use the imperative mood in the subject line
6.    Wrap the body at 72 characters
7.    Use the body to explain what and why vs. how

To be able to collaborate on any Git project, you need to know how to manage your remote repositories. Remote repositories are versions of your project that are hosted on the Internet or network somewhere. You can have several of them, each of which generally is either read-only or read/write for you. Collaborating with others involves managing these remote repositories and pushing and pulling data to and from them when you need to share work. Managing remote repositories includes knowing how to add remote repositories, remove remotes that are no longer valid, manage various remote branches and define them as being tracked or not, and more. In this section, we’ll cover some of these remote-management skills.

We'll focus on how to install git and gitweb on the Debian distribution. gitweb is a git web interface written in Perl, and can be used as a CGI script or as mod_Perl, and it will allow us browsing a git repository.