tests/printrevset.py

merge: introduce mergeresult.addfile() and use it

We want to use mergeresult object at more and more places instead of this
actions dict to simplify code and further add new APIs to mergeresult object.

This patch introduces `addfile()` which adds a new file to the internal actions
dict for now.

Differential Revision: https://phab.mercurial-scm.org/D8820

from __future__ import absolute_import
from mercurial import (
    cmdutil,
    commands,
    extensions,
    logcmdutil,
    revsetlang,
    smartset,
)

from mercurial.utils import stringutil


def logrevset(repo, pats, opts):
    revs = logcmdutil._initialrevs(repo, opts)
    if not revs:
        return None
    match, pats, slowpath = logcmdutil._makematcher(repo, revs, pats, opts)
    return logcmdutil._makerevset(repo, match, pats, slowpath, opts)


def uisetup(ui):
    def printrevset(orig, repo, pats, opts):
        revs, filematcher = orig(repo, pats, opts)
        if opts.get(b'print_revset'):
            expr = logrevset(repo, pats, opts)
            if expr:
                tree = revsetlang.parse(expr)
                tree = revsetlang.analyze(tree)
            else:
                tree = []
            ui = repo.ui
            ui.write(b'%s\n' % stringutil.pprint(opts.get(b'rev', [])))
            ui.write(revsetlang.prettyformat(tree) + b'\n')
            ui.write(stringutil.prettyrepr(revs) + b'\n')
            revs = smartset.baseset()  # display no revisions
        return revs, filematcher

    extensions.wrapfunction(logcmdutil, 'getrevs', printrevset)
    aliases, entry = cmdutil.findcmd(b'log', commands.table)
    entry[1].append(
        (
            b'',
            b'print-revset',
            False,
            b'print generated revset and exit (DEPRECATED)',
        )
    )