Hi Shawn, Thanks for the response! I looked at the JGit API. will it allow me to read a packfile, alter its contents, and repack it? regards, Mark -- View this message in context: http://git.661346.n2.nabble.com/calculating-a-git-packfile-sha1-checksum-in-java-tp6195501p6197923.html Sent from the git mailing list archive at Nabble.com. -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html