merge: rework manifestmerge to use a matcher
This opens the door to working slightly more closely with the manifest
type and letting it optimize out some of the diff comparisons for us,
and also makes life significantly easier for narrowhg.
# Base templates. Due to name clashes with existing keywords, we have
# to replace some keywords with 'lkeyword', for 'labelled keyword'
changeset = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{summary}\n'
changeset_quiet = '{lnode}'
changeset_verbose = '{cset}{branches}{bookmarks}{tags}{parents}{user}{ldate}{lfiles}{lfile_copies_switch}{description}\n'
changeset_debug = '{fullcset}{branches}{bookmarks}{tags}{lphase}{parents}{manifest}{user}{ldate}{lfile_mods}{lfile_adds}{lfile_dels}{lfile_copies_switch}{extras}{description}\n'
# File templates
lfiles = '{if(files,
label("ui.note log.files",
"files: {files}\n"))}'
lfile_mods = '{if(file_mods,
label("ui.debug log.files",
"files: {file_mods}\n"))}'
lfile_adds = '{if(file_adds,
label("ui.debug log.files",
"files+: {file_adds}\n"))}'
lfile_dels = '{if(file_dels,
label("ui.debug log.files",
"files-: {file_dels}\n"))}'
lfile_copies_switch = '{if(file_copies_switch,
label("ui.note log.copies",
"copies: {file_copies_switch
% ' {name} ({source})'}\n"))}'
# General templates
cset = '{label("log.changeset changeset.{phase}",
"changeset: {rev}:{node|short}")}\n'
lphase = '{label("log.phase",
"phase: {phase}")}\n'
fullcset = '{label("log.changeset changeset.{phase}",
"changeset: {rev}:{node}")}\n'
parent = '{label("log.parent changeset.{phase}",
"parent: {rev}:{node|formatnode}")}\n'
lnode = '{label("log.node",
"{rev}:{node|short}")}\n'
manifest = '{label("ui.debug log.manifest",
"manifest: {rev}:{node}")}\n'
branch = '{label("log.branch",
"branch: {branch}")}\n'
tag = '{label("log.tag",
"tag: {tag}")}\n'
bookmark = '{label("log.bookmark",
"bookmark: {bookmark}")}\n'
user = '{label("log.user",
"user: {author}")}\n'
summary = '{if(desc|strip, "{label('log.summary',
'summary: {desc|firstline}')}\n")}'
ldate = '{label("log.date",
"date: {date|date}")}\n'
extra = '{label("ui.debug log.extra",
"extra: {key}={value|stringescape}")}\n'
description = '{if(desc|strip, "{label('ui.note log.description',
'description:')}
{label('ui.note log.description',
'{desc|strip}')}\n\n")}'
status = '{status} {path}\n{if(copy, " {copy}\n")}'