git engage hors d'un fichier
git update-index --assume-unchanged "main/dontcheckmein.txt"
/*and to undo that*/
git update-index --no-assume-unchanged "main/dontcheckmein.txt"
git update-index --assume-unchanged "main/dontcheckmein.txt"
/*and to undo that*/
git update-index --no-assume-unchanged "main/dontcheckmein.txt"