Git

Sometime, you need to check that all the commits in a branch are building correctly. For example, when a rebase has been done, it is possible you or diff has made a mistake during the operation. The building operation can be run against all commits of the current branch with the following one-liner (splitted here for more readability): for COMMIT in $(git log --reverse --format=format:%H origin/master..HEAD); do git checkout ${COMMIT} ; make -j8 1>/dev/null || { echo "Commit $COMMIT don't build"; break; } done The idea is trivial, we build the list of commits with git log using a simple format string (to get only the hash). We add the reverse tag to start from the oldest commit. For each commit, we checkout and run the build command. If the build fails, we exit from the loop. ...

I have recently faced the challenge to rewrite a git repository. It has two problems: First problem was small: an user has commited with a badly setup git and E-mail as well as username were not correctly set. Second problem seems more tricky: I was needing to split the git repository in two different one. To be precise on that issue, from the two directories at root (src and deps) have to become the root of their own repository. I then dig into the doc and it leads me directly to ‘filter-branch’ which was the solution of my two problems. The names of the command is almost self-explanatory: it is used to rewrite branches. ...