contrib/xml.rnc

mq: create patch file after commit to import diff of ".hgsubstate" at qrefresh

Even though the committed revision contains diff of ".hgsubstate", the
patch file created by qrefresh doesn't contain it, because:

  - ".hgsubstate" is not listed up as one of target files of the patch
    for reasons below, so diff of ".hgsubstate" is not imported into
    patch file

      - status of ".hgsubstate" in working directory is usually "clean"
      - ".hgsubstate" is not specified explicitly by users

  - the patch file is created before commit processing which updates
    or creates ".hgsubstate" automatically, so there is no diff for it
    at that time

This patch resolves this problem by:

  - putting ".hgsubstate" into target list of the patch, if needed:
    this allows "patch.diff()" to import diff of ".hgsubstate" into
    patch file.

  - creating the patch file after commit processing:
    this updates ".hgsubstate" before "patch.diff()" invocation.

For the former fixing, this patch introduces "putsubstate2changes()"
to share same implementation with qnew. This is invoked only once per
qnew/qrefresh at most, so there is less performance impact.

This patch also omits "match" argument for "patch.diff()" invocation,
because "patch.diff()" ignores "match" if "changes" is specified.

# 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}