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# commit.py - fonction to perform commit
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import errno
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from .i18n import _
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from .node import (
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hex,
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nullid,
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nullrev,
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)
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from . import (
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context,
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mergestate,
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metadata,
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phases,
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scmutil,
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subrepoutil,
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)
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def _write_copy_meta(repo):
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"""return a (changelog, filelog) boolean tuple
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changelog: copy related information should be stored in the changeset
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filelof: copy related information should be written in the file revision
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"""
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if repo.filecopiesmode == b'changeset-sidedata':
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writechangesetcopy = True
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writefilecopymeta = True
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else:
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writecopiesto = repo.ui.config(b'experimental', b'copies.write-to')
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writefilecopymeta = writecopiesto != b'changeset-only'
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writechangesetcopy = writecopiesto in (
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b'changeset-only',
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b'compatibility',
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)
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return writechangesetcopy, writefilecopymeta
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def commitctx(repo, ctx, error=False, origctx=None):
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"""Add a new revision to the target repository.
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Revision information is passed via the context argument.
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ctx.files() should list all files involved in this commit, i.e.
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modified/added/removed files. On merge, it may be wider than the
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ctx.files() to be committed, since any file nodes derived directly
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from p1 or p2 are excluded from the committed ctx.files().
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origctx is for convert to work around the problem that bug
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fixes to the files list in changesets change hashes. For
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convert to be the identity, it can pass an origctx and this
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function will use the same files list when it makes sense to
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do so.
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"""
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repo = repo.unfiltered()
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p1, p2 = ctx.p1(), ctx.p2()
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user = ctx.user()
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with repo.lock(), repo.transaction(b"commit") as tr:
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mn, files = _prepare_files(tr, ctx, error=error, origctx=origctx)
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extra = ctx.extra().copy()
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if extra is not None:
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for name in (
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b'p1copies',
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b'p2copies',
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b'filesadded',
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b'filesremoved',
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):
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extra.pop(name, None)
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if repo.changelog._copiesstorage == b'extra':
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extra = _extra_with_copies(repo, extra, files)
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# update changelog
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repo.ui.note(_(b"committing changelog\n"))
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repo.changelog.delayupdate(tr)
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n = repo.changelog.add(
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mn,
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files,
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ctx.description(),
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tr,
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p1.node(),
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p2.node(),
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user,
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ctx.date(),
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extra,
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)
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xp1, xp2 = p1.hex(), p2 and p2.hex() or b''
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repo.hook(
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b'pretxncommit', throw=True, node=hex(n), parent1=xp1, parent2=xp2,
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)
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# set the new commit is proper phase
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targetphase = subrepoutil.newcommitphase(repo.ui, ctx)
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if targetphase:
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# retract boundary do not alter parent changeset.
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# if a parent have higher the resulting phase will
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# be compliant anyway
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#
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# if minimal phase was 0 we don't need to retract anything
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phases.registernew(repo, tr, targetphase, [n])
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return n
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def _prepare_files(tr, ctx, error=False, origctx=None):
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repo = ctx.repo()
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p1 = ctx.p1()
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writechangesetcopy, writefilecopymeta = _write_copy_meta(repo)
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if ctx.manifestnode():
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# reuse an existing manifest revision
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repo.ui.debug(b'reusing known manifest\n')
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mn = ctx.manifestnode()
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files = metadata.ChangingFiles()
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files.update_touched(ctx.files())
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if writechangesetcopy:
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files.update_added(ctx.filesadded())
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files.update_removed(ctx.filesremoved())
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elif not ctx.files():
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repo.ui.debug(b'reusing manifest from p1 (no file change)\n')
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mn = p1.manifestnode()
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files = metadata.ChangingFiles()
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else:
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mn, files = _process_files(tr, ctx, error=error)
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if origctx and origctx.manifestnode() == mn:
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origfiles = origctx.files()
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assert files.touched.issubset(origfiles)
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files.update_touched(origfiles)
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if writechangesetcopy:
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files.update_copies_from_p1(ctx.p1copies())
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files.update_copies_from_p2(ctx.p2copies())
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return mn, files
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def _process_files(tr, ctx, error=False):
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repo = ctx.repo()
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p1 = ctx.p1()
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p2 = ctx.p2()
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writechangesetcopy, writefilecopymeta = _write_copy_meta(repo)
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m1ctx = p1.manifestctx()
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m2ctx = p2.manifestctx()
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mctx = m1ctx.copy()
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m = mctx.read()
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m1 = m1ctx.read()
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m2 = m2ctx.read()
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ms = mergestate.mergestate.read(repo)
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files = metadata.ChangingFiles()
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# check in files
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added = []
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removed = list(ctx.removed())
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linkrev = len(repo)
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repo.ui.note(_(b"committing files:\n"))
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uipathfn = scmutil.getuipathfn(repo)
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for f in sorted(ctx.modified() + ctx.added()):
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repo.ui.note(uipathfn(f) + b"\n")
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try:
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fctx = ctx[f]
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if fctx is None:
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removed.append(f)
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else:
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added.append(f)
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m[f], is_touched = _filecommit(
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repo, fctx, m1, m2, linkrev, tr, writefilecopymeta, ms
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)
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if is_touched:
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if is_touched == 'added':
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files.mark_added(f)
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else:
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files.mark_touched(f)
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m.setflag(f, fctx.flags())
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except OSError:
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repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f))
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raise
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except IOError as inst:
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errcode = getattr(inst, 'errno', errno.ENOENT)
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if error or errcode and errcode != errno.ENOENT:
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repo.ui.warn(_(b"trouble committing %s!\n") % uipathfn(f))
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raise
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# update manifest
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removed = [f for f in removed if f in m1 or f in m2]
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drop = sorted([f for f in removed if f in m])
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for f in drop:
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del m[f]
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if p2.rev() == nullrev:
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files.update_removed(removed)
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else:
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rf = metadata.get_removal_filter(ctx, (p1, p2, m1, m2))
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for f in removed:
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if not rf(f):
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files.mark_removed(f)
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mn = _commit_manifest(tr, linkrev, ctx, mctx, m, files.touched, added, drop)
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return mn, files
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def _filecommit(
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repo, fctx, manifest1, manifest2, linkrev, tr, includecopymeta, ms,
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):
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"""
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commit an individual file as part of a larger transaction
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input:
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fctx: a file context with the content we are trying to commit
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manifest1: manifest of changeset first parent
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manifest2: manifest of changeset second parent
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linkrev: revision number of the changeset being created
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tr: current transation
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includecopymeta: boolean, set to False to skip storing the copy data
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(only used by the Google specific feature of using
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changeset extra as copy source of truth).
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ms: mergestate object
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output: (filenode, touched)
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filenode: the filenode that should be used by this changeset
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touched: one of: None (mean untouched), 'added' or 'modified'
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"""
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fname = fctx.path()
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fparent1 = manifest1.get(fname, nullid)
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fparent2 = manifest2.get(fname, nullid)
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touched = None
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if fparent1 == fparent2 == nullid:
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touched = 'added'
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if isinstance(fctx, context.filectx):
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# This block fast path most comparisons which are usually done. It
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# assumes that bare filectx is used and no merge happened, hence no
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# need to create a new file revision in this case.
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node = fctx.filenode()
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if node in [fparent1, fparent2]:
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repo.ui.debug(b'reusing %s filelog entry\n' % fname)
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if (
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fparent1 != nullid and manifest1.flags(fname) != fctx.flags()
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) or (
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fparent2 != nullid and manifest2.flags(fname) != fctx.flags()
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):
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touched = 'modified'
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return node, touched
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flog = repo.file(fname)
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meta = {}
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cfname = fctx.copysource()
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fnode = None
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if cfname and cfname != fname:
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# Mark the new revision of this file as a copy of another
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# file. This copy data will effectively act as a parent
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# of this new revision. If this is a merge, the first
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# parent will be the nullid (meaning "look up the copy data")
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# and the second one will be the other parent. For example:
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#
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# 0 --- 1 --- 3 rev1 changes file foo
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# \ / rev2 renames foo to bar and changes it
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# \- 2 -/ rev3 should have bar with all changes and
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# should record that bar descends from
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# bar in rev2 and foo in rev1
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#
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# this allows this merge to succeed:
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#
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# 0 --- 1 --- 3 rev4 reverts the content change from rev2
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# \ / merging rev3 and rev4 should use bar@rev2
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# \- 2 --- 4 as the merge base
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#
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cnode = manifest1.get(cfname)
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newfparent = fparent2
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if manifest2: # branch merge
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if fparent2 == nullid or cnode is None: # copied on remote side
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if cfname in manifest2:
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cnode = manifest2[cfname]
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newfparent = fparent1
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# Here, we used to search backwards through history to try to find
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# where the file copy came from if the source of a copy was not in
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# the parent directory. However, this doesn't actually make sense to
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# do (what does a copy from something not in your working copy even
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# mean?) and it causes bugs (eg, issue4476). Instead, we will warn
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# the user that copy information was dropped, so if they didn't
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# expect this outcome it can be fixed, but this is the correct
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# behavior in this circumstance.
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if cnode:
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repo.ui.debug(b" %s: copy %s:%s\n" % (fname, cfname, hex(cnode)))
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if includecopymeta:
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meta[b"copy"] = cfname
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meta[b"copyrev"] = hex(cnode)
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fparent1, fparent2 = nullid, newfparent
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else:
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repo.ui.warn(
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_(
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b"warning: can't find ancestor for '%s' "
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b"copied from '%s'!\n"
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)
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% (fname, cfname)
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)
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elif fparent1 == nullid:
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fparent1, fparent2 = fparent2, nullid
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elif fparent2 != nullid:
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# is one parent an ancestor of the other?
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fparentancestors = flog.commonancestorsheads(fparent1, fparent2)
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if fparent1 in fparentancestors:
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fparent1, fparent2 = fparent2, nullid
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elif fparent2 in fparentancestors:
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fparent2 = nullid
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elif not fparentancestors:
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# TODO: this whole if-else might be simplified much more
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if (
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ms.active()
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and ms.extras(fname).get(b'filenode-source') == b'other'
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):
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fparent1, fparent2 = fparent2, nullid
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force_new_node = False
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# The file might have been deleted by merge code and user explicitly choose
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# to revert the file and keep it. The other case can be where there is
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# change-delete or delete-change conflict and user explicitly choose to keep
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# the file. The goal is to create a new filenode for users explicit choices
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if (
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repo.ui.configbool(b'experimental', b'merge-track-salvaged')
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and ms.active()
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and ms.extras(fname).get(b'merge-removal-candidate') == b'yes'
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):
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force_new_node = True
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# is the file changed?
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text = fctx.data()
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if fparent2 != nullid or meta or flog.cmp(fparent1, text) or force_new_node:
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if touched is None: # do not overwrite added
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touched = 'modified'
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fnode = flog.add(text, meta, tr, linkrev, fparent1, fparent2)
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# are just the flags changed during merge?
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elif fname in manifest1 and manifest1.flags(fname) != fctx.flags():
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touched = 'modified'
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fnode = fparent1
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else:
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fnode = fparent1
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return fnode, touched
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def _commit_manifest(tr, linkrev, ctx, mctx, manifest, files, added, drop):
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"""make a new manifest entry (or reuse a new one)
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given an initialised manifest context and precomputed list of
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- files: files affected by the commit
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- added: new entries in the manifest
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- drop: entries present in parents but absent of this one
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Create a new manifest revision, reuse existing ones if possible.
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Return the nodeid of the manifest revision.
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"""
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repo = ctx.repo()
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md = None
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# all this is cached, so it is find to get them all from the ctx.
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p1 = ctx.p1()
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p2 = ctx.p2()
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m1ctx = p1.manifestctx()
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m1 = m1ctx.read()
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if not files:
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# if no "files" actually changed in terms of the changelog,
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# try hard to detect unmodified manifest entry so that the
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# exact same commit can be reproduced later on convert.
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md = m1.diff(manifest, scmutil.matchfiles(repo, ctx.files()))
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if not files and md:
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repo.ui.debug(
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b'not reusing manifest (no file change in '
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b'changelog, but manifest differs)\n'
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)
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if files or md:
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repo.ui.note(_(b"committing manifest\n"))
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# we're using narrowmatch here since it's already applied at
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# other stages (such as dirstate.walk), so we're already
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# ignoring things outside of narrowspec in most cases. The
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# one case where we might have files outside the narrowspec
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# at this point is merges, and we already error out in the
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# case where the merge has files outside of the narrowspec,
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# so this is safe.
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mn = mctx.write(
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tr,
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linkrev,
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p1.manifestnode(),
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p2.manifestnode(),
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added,
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drop,
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match=repo.narrowmatch(),
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)
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else:
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repo.ui.debug(
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b'reusing manifest from p1 (listed files ' b'actually unchanged)\n'
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)
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mn = p1.manifestnode()
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return mn
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def _extra_with_copies(repo, extra, files):
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"""encode copy information into a `extra` dictionnary"""
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p1copies = files.copied_from_p1
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p2copies = files.copied_from_p2
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filesadded = files.added
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filesremoved = files.removed
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files = sorted(files.touched)
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if not _write_copy_meta(repo)[1]:
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# If writing only to changeset extras, use None to indicate that
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# no entry should be written. If writing to both, write an empty
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# entry to prevent the reader from falling back to reading
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# filelogs.
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p1copies = p1copies or None
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p2copies = p2copies or None
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filesadded = filesadded or None
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filesremoved = filesremoved or None
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extrasentries = p1copies, p2copies, filesadded, filesremoved
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if extra is None and any(x is not None for x in extrasentries):
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extra = {}
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if p1copies is not None:
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p1copies = metadata.encodecopies(files, p1copies)
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extra[b'p1copies'] = p1copies
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if p2copies is not None:
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p2copies = metadata.encodecopies(files, p2copies)
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extra[b'p2copies'] = p2copies
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if filesadded is not None:
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filesadded = metadata.encodefileindices(files, filesadded)
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extra[b'filesadded'] = filesadded
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if filesremoved is not None:
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filesremoved = metadata.encodefileindices(files, filesremoved)
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extra[b'filesremoved'] = filesremoved
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return extra
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