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diff --git a/doc/design/assistant/blog/day_126__mr_watson_come_here.mdwn b/doc/design/assistant/blog/day_126__mr_watson_come_here.mdwn new file mode 100644 index 000000000..78d263b6d --- /dev/null +++ b/doc/design/assistant/blog/day_126__mr_watson_come_here.mdwn @@ -0,0 +1,52 @@ +I'm stunned and stoked to have gotten git push over XMPP working today. +And am nearly out of steam, it was a wild ride.. + + To xmpp::joey@kitenet.net + * [new branch] master -> refs/xmpp/newmaster + +The surprising part is how close my initial implementation came to just +working on the first try. It had around 3 bugs, which took hours of staring +at debugging output to find: + +1. The git push action was run in the same thread as the XMPP + client, which prevented the client from continuing to run and relaying + messages. +2. The git-receive-pack side waited on the wrong thread, so didn't + notice when the program was done. +3. I accidentially used the wrong attribute name when sending a ReceivePackDone + message. + +But all in all, it just worked. + +Here's a sample of the actual data sent when one file is added to the +repository (also includes the corresponding update to the git-annex branch): + + MDA4NjhhMmNmOGZjMWE3MTlkOGVjOWVmOWZiMGZiNjVlODc2NjQ1NDAyMTAgODIwNTZjMDM4 + ZjU2YzE1ODdjYzllOWRhNzQzMzU0YjE4NzNjZWJlOSByZWZzL3htcHAvbmV3bWFzdGVyACBy + ZXBvcnQtc3RhdHVzIHNpZGUtYmFuZC02NGswMDAw + + UEFDSwAAAAIAAAADnAx4nJXLTQ4CIQxA4T2n4AKaAqVAYoxL4y2gU+Jo5iczdeHtnSu4eMm3 + ebqJ2NwgSCLmNkTBlKFCYwwhoHOtQ+scqZCwWesms9pcPffc2dXkypCFi/TSG/RGUXIiwojg + HZj60eey2cciX3uXfbeX18Hbe1SZRc9HV+tC9FgyJW9PgACGl2kaVeXfz/wArHQ81qMGeJwz + NDIAAoVUI4ZZB9RW1E8NtXp5t77/fn3hw41cl2MNIbIZqTk5+Qwerw+aJX2INjsffYndtdCz + 5mZWLDdUQV5qeVpmDtCQnx/3/6s40+Q4P/7O+Y4ShS+1Ad83AwC6CirftAt4nK3MsRGDMAwF + 0IkcSVgSdpkidzRUmcDWBy4pSAEFl+mzRN4A77a9Tmr7vlz06e8lzoPmmb5Mz+k+mD/SkTkl + eFHPq9eqQ+nSzFsWaDFnFmCMCEOvHgLrCrQxS7AWdvUVhv9uPwHxMbfumlvWdco1RLL4wSQF + g0uFFOKu3Q== + +Git said this push took 385 bytes; after base64 encoding to transport it over +XMPP as shown above, it needs 701 bytes, and the XMPP envelope and encryption +adds more overhead (although the XMPP connection may also be compressed?) + +Not the most efficient git transport, but still a practical one! + +---- + +Big thanks by the way to meep, who posted a comment reminding me about +`git-remote-helpers`. This was the right thing to use for XMPP over git, +it lets the git remote be configured with `url = xmpp::user@host`. + +---- + +Next, I need to get the assistant to use this for syncing. Currently, it only +pushes a test branch. |