# [ANNOUNCE] A pre-receive hook to intelligently block binary data 1 messages from 2014-10-31 to 2014-10-31. Participants: Ævar Arnfjörð Bjarmason. Thread: https://gitlist.dev/t/37858 ## Ævar Arnfjörð Bjarmason, 2014-10-31 19:25 Subject: [ANNOUNCE] A pre-receive hook to intelligently block binary data Message-ID: URL: https://gitlist.dev/e/CACBZZX64ofaQSoOMhQcjx%2BED2LOpdDVZJ_5TSjotuBv4m%2BFb5A%40mail.gmail.com ``` After searching around a bit I couldn't find a stand-alone Git hook that would intelligently block binary data pushes so I wrote my own: https://github.com/avar/pre-receive-reject-binaries Main features: * Quota per-commit for how much binary data is OK * Ability to optionally allow users to override binary pushes by including a notice in their commit messages * Doesn't disallow removing existing binary data, or renaming existing binary files * Will block commits that include references to existing binary blobs though * Spots cases where a push is pushing commits that add and then remove binary blobs (i.e. counts net additions) * Has hookable support for logging by piping its output to external commands when it runs or when it rejects/unblocks a binary push. I'm using this for logging its output to a logfile, and to send E-Mails when it blocks/is unblocked. * Only requires a stock perl install, should run on any *nix-like OS out of the box * Should be relatively fast compared to some other similar solutions I've seen, i.e. it parses the output of one "git-log --stat" command for the entire push, and doesn't e.g. do a "git show" for each commit being pushed. One general note about git-log output: I was disappointed to see that there was no easily parsable "git log" output that showed you how much binary files increased in size, --numstat will just show "-" for binary files, and it's non-trivial to parse the "--stat" output. It's meant for human consumption and will sometimes include variations in how much whitespace is inserted. ```