bundle: introduce an higher level function to write bundle on disk
The current function ('writebundle') is focussing on getting an existing
changegroup to disk. It is no easy ways to includes more part in the generated
bundle2. So we introduce a slightly higher level function that is fed the
'outgoing' object (that defines the bundled spec) and the bundlespec parameters
(to control the changegroup generation and inclusion of other parts).
This is creating the third logic dedicated to create a consistent bundle2 (the
other 2 are the push code and the getbundle code). We should probably reconcile
them at some points but they all takes different types of input. So we need to
introduce an intermediate "object" that each different input could be converted
to. Such unified "bundle2 specification" could be fed to some unified code.
We start by having the `hg bundle` related code on its own to helps defines its
specific needs first. Once the common and specific parts of each logic will be
known we can start unification.
# Helper script used for generating history and working copy files and content.
# The file's name corresponds to its history. The number of changesets can
# be specified on the command line. With 2 changesets, files with names like
# content1_content2_content1-untracked are generated. The first two filename
# segments describe the contents in the two changesets. The third segment
# ("content1-untracked") describes the state in the working copy, i.e.
# the file has content "content1" and is untracked (since it was previously
# tracked, it has been forgotten).
#
# This script generates the filenames and their content, but it's up to the
# caller to tell hg about the state.
#
# There are two subcommands:
# filelist <numchangesets>
# state <numchangesets> (<changeset>|wc)
#
# Typical usage:
#
# $ python $TESTDIR/generate-working-copy-states.py state 2 1
# $ hg addremove --similarity 0
# $ hg commit -m 'first'
#
# $ python $TESTDIR/generate-working-copy-states.py state 2 1
# $ hg addremove --similarity 0
# $ hg commit -m 'second'
#
# $ python $TESTDIR/generate-working-copy-states.py state 2 wc
# $ hg addremove --similarity 0
# $ hg forget *_*_*-untracked
# $ rm *_*_missing-*
from __future__ import absolute_import, print_function
import os
import sys
# Generates pairs of (filename, contents), where 'contents' is a list
# describing the file's content at each revision (or in the working copy).
# At each revision, it is either None or the file's actual content. When not
# None, it may be either new content or the same content as an earlier
# revisions, so all of (modified,clean,added,removed) can be tested.
def generatestates(maxchangesets, parentcontents):
depth = len(parentcontents)
if depth == maxchangesets + 1:
for tracked in ('untracked', 'tracked'):
filename = "_".join([(content is None and 'missing' or content) for
content in parentcontents]) + "-" + tracked
yield (filename, parentcontents)
else:
for content in (set([None, 'content' + str(depth + 1)]) |
set(parentcontents)):
for combination in generatestates(maxchangesets,
parentcontents + [content]):
yield combination
# retrieve the command line arguments
target = sys.argv[1]
maxchangesets = int(sys.argv[2])
if target == 'state':
depth = sys.argv[3]
# sort to make sure we have stable output
combinations = sorted(generatestates(maxchangesets, []))
# compute file content
content = []
for filename, states in combinations:
if target == 'filelist':
print(filename)
elif target == 'state':
if depth == 'wc':
# Make sure there is content so the file gets written and can be
# tracked. It will be deleted outside of this script.
content.append((filename, states[maxchangesets] or 'TOBEDELETED'))
else:
content.append((filename, states[int(depth) - 1]))
else:
print("unknown target:", target, file=sys.stderr)
sys.exit(1)
# write actual content
for filename, data in content:
if data is not None:
f = open(filename, 'wb')
f.write(data + '\n')
f.close()
elif os.path.exists(filename):
os.remove(filename)