Mercurial > hg
view contrib/xml.rnc @ 30619:88efb4fb1975
chgserver: truncate base address at "." for hash address
Previously, the hash address is just appending "-$HASH" to base address.
This patch makes it truncate the basename address at "." before appending
"-$HASH".
This makes it possible to spawn new servers in a racy situation and the
client could be sure the server it connects is the new server just spawned.
This is a step towards removing the lock.
One of the functionalities of the lock is to make sure the connect will
connect to a server it just created:
1. start server --address foo
2. connect to foo # wish "foo" is the server just started
With this change, the client could do:
1. start server --address foo.tmp$PID
2. connect to foo.tmp$PID # is the server just started
(note: if it is not, it does not affect correctness - linux pid
namespace is not a concern here)
3. rename foo.tmp$PID to foo
Another functionality of the lock is to avoid starting multiple servers with
a same confighash in parallel. But that also prevents starting multiple
servers with different confighashes in parallel.
author | Jun Wu <quark@fb.com> |
---|---|
date | Mon, 19 Dec 2016 22:07:41 +0000 |
parents | 3acfb69a4729 |
children |
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# RelaxNG schema for "xml" log style # Inspired by Subversion's XML log format. start = log node.type = xsd:string {minLength = "40" maxLength = "40"} log = element log { logentry+ } logentry = element logentry { logentry.attlist, branch*, tag*, hgparent*, author, date, msg, paths?, copies?, extra* } logentry.attlist = attribute revision {xsd:nonNegativeInteger} & attribute node {node.type} branch = element branch { text } tag = element tag { text } hgparent = element parent {hgparent.attlist, text} hgparent.attlist = attribute revision {xsd:integer {minInclusive = "-1"} } & attribute node {node.type} author = element author { author.attlist, text } author.attlist = attribute email {text} date = element date {xsd:dateTime} msg = element msg {msg.attlist, text} msg.attlist = attribute xml:space {"preserve"} paths = element paths { path* } path = element path { path.attlist, text } path.attlist = # Action: (A)dd, (M)odify, (R)emove attribute action {"A"|"M"|"R"} copies = element copies { copy+ } copy = element copy { copy.attlist, text } copy.attlist = attribute source {text} extra = element extra {extra.attlist, text} extra.attlist = attribute key {text}