Control: reassign -1 dpkg-dev Control: severity -1 wishlist Control: retitle -1 dpkg-source: new field Tarsum with a tree hash in .dsc to possibly skip reunpacking the tarballs on build Control: user [email protected] Control: usertag -1 new-field dsc-format dpkg-source
On Sat, 2013-08-31 at 18:04:40 -0700, Shawn Landden wrote: > Package: dpkg > Version: 1.17.2 > Severity: normal > It would have the output of: > find <sourcedir> -type f -print0 | sort -z | xargs -0 sha1sum | sha1sum > > This way the very slow step of verifying that the dir tree hasn't > changed can be done very fast, without re-unpacking the source tarball, > and just comparing the value, to the same run on the build tree. Hmm, that implies that to build a new version the previous .dsc file needs to be available, I'd rather not make the code having to poke on previous .dsc files. Also currently before doing a diff, the trees are compared until a path does not match, as a speed up. Unpacking a new tree is going to be somewhat slow, but hashsing the entire tree is going to be slow too, and with that it cannot bail out early. So for large trees I'm not sure if the performance difference is going to be so significant. More so with an operation (building) which is supposedly done seldomly (once, while extracting is done many times), and while optimizing it would be nice, I don't think this specific proposal is the right direction to follow. Thanks, Guillem -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
