vfs: always use / as file separator (issue6546)

Various part of vfs already enforce `/` usage and using `\` confuse the encoded
vfs. So we simply use `/` all the time.

Differential Revision: https://phab.mercurial-scm.org/D11260

mercurial/vfs.py

@@ -1,754 +1,774 b''
 # vfs.py - Mercurial 'vfs' classes
 #
 #  Copyright Olivia Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 from __future__ import absolute_import
 
 import contextlib
 import errno
 import os
 import shutil
 import stat
 import threading
 
 from .i18n import _
 from .pycompat import (
     delattr,
     getattr,
     setattr,
 )
 from . import (
     encoding,
     error,
     pathutil,
     pycompat,
     util,
 )
 
 
 def _avoidambig(path, oldstat):
     """Avoid file stat ambiguity forcibly
 
     This function causes copying ``path`` file, if it is owned by
     another (see issue5418 and issue5584 for detail).
     """
 
     def checkandavoid():
         newstat = util.filestat.frompath(path)
         # return whether file stat ambiguity is (already) avoided
         return not newstat.isambig(oldstat) or newstat.avoidambig(path, oldstat)
 
     if not checkandavoid():
         # simply copy to change owner of path to get privilege to
         # advance mtime (see issue5418)
         util.rename(util.mktempcopy(path), path)
         checkandavoid()
 
 
 class abstractvfs(object):
     """Abstract base class; cannot be instantiated"""
 
+    # default directory separator for vfs
+    #
+    # Other vfs code always use `/` and this works fine because python file API
+    # abstract the use of `/` and make it work transparently. For consistency
+    # vfs will always use `/` when joining. This avoid some confusion in
+    # encoded vfs (see issue6546)
+    _dir_sep = b'/'
+
     def __init__(self, *args, **kwargs):
         '''Prevent instantiation; don't call this from subclasses.'''
         raise NotImplementedError('attempted instantiating ' + str(type(self)))
 
     def __call__(self, path, mode=b'rb', **kwargs):
         raise NotImplementedError
 
     def _auditpath(self, path, mode):
         raise NotImplementedError
 
     def join(self, path, *insidef):
         raise NotImplementedError
 
     def tryread(self, path):
         '''gracefully return an empty string for missing files'''
         try:
             return self.read(path)
         except IOError as inst:
             if inst.errno != errno.ENOENT:
                 raise
         return b""
 
     def tryreadlines(self, path, mode=b'rb'):
         '''gracefully return an empty array for missing files'''
         try:
             return self.readlines(path, mode=mode)
         except IOError as inst:
             if inst.errno != errno.ENOENT:
                 raise
         return []
 
     @util.propertycache
     def open(self):
         """Open ``path`` file, which is relative to vfs root.
 
         Newly created directories are marked as "not to be indexed by
         the content indexing service", if ``notindexed`` is specified
         for "write" mode access.
         """
         return self.__call__
 
     def read(self, path):
         with self(path, b'rb') as fp:
             return fp.read()
 
     def readlines(self, path, mode=b'rb'):
         with self(path, mode=mode) as fp:
             return fp.readlines()
 
     def write(self, path, data, backgroundclose=False, **kwargs):
         with self(path, b'wb', backgroundclose=backgroundclose, **kwargs) as fp:
             return fp.write(data)
 
     def writelines(self, path, data, mode=b'wb', notindexed=False):
         with self(path, mode=mode, notindexed=notindexed) as fp:
             return fp.writelines(data)
 
     def append(self, path, data):
         with self(path, b'ab') as fp:
             return fp.write(data)
 
     def basename(self, path):
         """return base element of a path (as os.path.basename would do)
 
         This exists to allow handling of strange encoding if needed."""
         return os.path.basename(path)
 
     def chmod(self, path, mode):
         return os.chmod(self.join(path), mode)
 
     def dirname(self, path):
         """return dirname element of a path (as os.path.dirname would do)
 
         This exists to allow handling of strange encoding if needed."""
         return os.path.dirname(path)
 
     def exists(self, path=None):
         return os.path.exists(self.join(path))
 
     def fstat(self, fp):
         return util.fstat(fp)
 
     def isdir(self, path=None):
         return os.path.isdir(self.join(path))
 
     def isfile(self, path=None):
         return os.path.isfile(self.join(path))
 
     def islink(self, path=None):
         return os.path.islink(self.join(path))
 
     def isfileorlink(self, path=None):
         """return whether path is a regular file or a symlink
 
         Unlike isfile, this doesn't follow symlinks."""
         try:
             st = self.lstat(path)
         except OSError:
             return False
         mode = st.st_mode
         return stat.S_ISREG(mode) or stat.S_ISLNK(mode)
 
+    def _join(self, *paths):
+        root_idx = 0
+        for idx, p in enumerate(paths):
+            if os.path.isabs(p) or p.startswith(self._dir_sep):
+                root_idx = idx
+        if root_idx != 0:
+            paths = paths[root_idx:]
+        paths = [p for p in paths if p]
+        return self._dir_sep.join(paths)
+
     def reljoin(self, *paths):
         """join various elements of a path together (as os.path.join would do)
 
         The vfs base is not injected so that path stay relative. This exists
         to allow handling of strange encoding if needed."""
-        return os.path.join(*paths)
+        return self._join(*paths)
 
     def split(self, path):
         """split top-most element of a path (as os.path.split would do)
 
         This exists to allow handling of strange encoding if needed."""
         return os.path.split(path)
 
     def lexists(self, path=None):
         return os.path.lexists(self.join(path))
 
     def lstat(self, path=None):
         return os.lstat(self.join(path))
 
     def listdir(self, path=None):
         return os.listdir(self.join(path))
 
     def makedir(self, path=None, notindexed=True):
         return util.makedir(self.join(path), notindexed)
 
     def makedirs(self, path=None, mode=None):
         return util.makedirs(self.join(path), mode)
 
     def makelock(self, info, path):
         return util.makelock(info, self.join(path))
 
     def mkdir(self, path=None):
         return os.mkdir(self.join(path))
 
     def mkstemp(self, suffix=b'', prefix=b'tmp', dir=None):
         fd, name = pycompat.mkstemp(
             suffix=suffix, prefix=prefix, dir=self.join(dir)
         )
         dname, fname = util.split(name)
         if dir:
             return fd, os.path.join(dir, fname)
         else:
             return fd, fname
 
     def readdir(self, path=None, stat=None, skip=None):
         return util.listdir(self.join(path), stat, skip)
 
     def readlock(self, path):
         return util.readlock(self.join(path))
 
     def rename(self, src, dst, checkambig=False):
         """Rename from src to dst
 
         checkambig argument is used with util.filestat, and is useful
         only if destination file is guarded by any lock
         (e.g. repo.lock or repo.wlock).
 
         To avoid file stat ambiguity forcibly, checkambig=True involves
         copying ``src`` file, if it is owned by another. Therefore, use
         checkambig=True only in limited cases (see also issue5418 and
         issue5584 for detail).
         """
         self._auditpath(dst, b'w')
         srcpath = self.join(src)
         dstpath = self.join(dst)
         oldstat = checkambig and util.filestat.frompath(dstpath)
         if oldstat and oldstat.stat:
             ret = util.rename(srcpath, dstpath)
             _avoidambig(dstpath, oldstat)
             return ret
         return util.rename(srcpath, dstpath)
 
     def readlink(self, path):
         return util.readlink(self.join(path))
 
     def removedirs(self, path=None):
         """Remove a leaf directory and all empty intermediate ones"""
         return util.removedirs(self.join(path))
 
     def rmdir(self, path=None):
         """Remove an empty directory."""
         return os.rmdir(self.join(path))
 
     def rmtree(self, path=None, ignore_errors=False, forcibly=False):
         """Remove a directory tree recursively
 
         If ``forcibly``, this tries to remove READ-ONLY files, too.
         """
         if forcibly:
 
             def onerror(function, path, excinfo):
                 if function is not os.remove:
                     raise
                 # read-only files cannot be unlinked under Windows
                 s = os.stat(path)
                 if (s.st_mode & stat.S_IWRITE) != 0:
                     raise
                 os.chmod(path, stat.S_IMODE(s.st_mode) | stat.S_IWRITE)
                 os.remove(path)
 
         else:
             onerror = None
         return shutil.rmtree(
             self.join(path), ignore_errors=ignore_errors, onerror=onerror
         )
 
     def setflags(self, path, l, x):
         return util.setflags(self.join(path), l, x)
 
     def stat(self, path=None):
         return os.stat(self.join(path))
 
     def unlink(self, path=None):
         return util.unlink(self.join(path))
 
     def tryunlink(self, path=None):
         """Attempt to remove a file, ignoring missing file errors."""
         util.tryunlink(self.join(path))
 
     def unlinkpath(self, path=None, ignoremissing=False, rmdir=True):
         return util.unlinkpath(
             self.join(path), ignoremissing=ignoremissing, rmdir=rmdir
         )
 
     def utime(self, path=None, t=None):
         return os.utime(self.join(path), t)
 
     def walk(self, path=None, onerror=None):
         """Yield (dirpath, dirs, files) tuple for each directories under path
 
         ``dirpath`` is relative one from the root of this vfs. This
         uses ``os.sep`` as path separator, even you specify POSIX
         style ``path``.
 
         "The root of this vfs" is represented as empty ``dirpath``.
         """
         root = os.path.normpath(self.join(None))
         # when dirpath == root, dirpath[prefixlen:] becomes empty
         # because len(dirpath) < prefixlen.
         prefixlen = len(pathutil.normasprefix(root))
         for dirpath, dirs, files in os.walk(self.join(path), onerror=onerror):
             yield (dirpath[prefixlen:], dirs, files)
 
     @contextlib.contextmanager
     def backgroundclosing(self, ui, expectedcount=-1):
         """Allow files to be closed asynchronously.
 
         When this context manager is active, ``backgroundclose`` can be passed
         to ``__call__``/``open`` to result in the file possibly being closed
         asynchronously, on a background thread.
         """
         # Sharing backgroundfilecloser between threads is complex and using
         # multiple instances puts us at risk of running out of file descriptors
         # only allow to use backgroundfilecloser when in main thread.
         if not isinstance(
             threading.current_thread(),
             threading._MainThread,  # pytype: disable=module-attr
         ):
             yield
             return
         vfs = getattr(self, 'vfs', self)
         if getattr(vfs, '_backgroundfilecloser', None):
             raise error.Abort(
                 _(b'can only have 1 active background file closer')
             )
 
         with backgroundfilecloser(ui, expectedcount=expectedcount) as bfc:
             try:
                 vfs._backgroundfilecloser = (
                     bfc  # pytype: disable=attribute-error
                 )
                 yield bfc
             finally:
                 vfs._backgroundfilecloser = (
                     None  # pytype: disable=attribute-error
                 )
 
     def register_file(self, path):
         """generic hook point to lets fncache steer its stew"""
 
 
 class vfs(abstractvfs):
     """Operate files relative to a base directory
 
     This class is used to hide the details of COW semantics and
     remote file access from higher level code.
 
     'cacheaudited' should be enabled only if (a) vfs object is short-lived, or
     (b) the base directory is managed by hg and considered sort-of append-only.
     See pathutil.pathauditor() for details.
     """
 
     def __init__(
         self,
         base,
         audit=True,
         cacheaudited=False,
         expandpath=False,
         realpath=False,
     ):
         if expandpath:
             base = util.expandpath(base)
         if realpath:
             base = os.path.realpath(base)
         self.base = base
         self._audit = audit
         if audit:
             self.audit = pathutil.pathauditor(self.base, cached=cacheaudited)
         else:
             self.audit = lambda path, mode=None: True
         self.createmode = None
         self._trustnlink = None
         self.options = {}
 
     @util.propertycache
     def _cansymlink(self):
         return util.checklink(self.base)
 
     @util.propertycache
     def _chmod(self):
         return util.checkexec(self.base)
 
     def _fixfilemode(self, name):
         if self.createmode is None or not self._chmod:
             return
         os.chmod(name, self.createmode & 0o666)
 
     def _auditpath(self, path, mode):
         if self._audit:
             if os.path.isabs(path) and path.startswith(self.base):
                 path = os.path.relpath(path, self.base)
             r = util.checkosfilename(path)
             if r:
                 raise error.Abort(b"%s: %r" % (r, path))
             self.audit(path, mode=mode)
 
     def __call__(
         self,
         path,
         mode=b"r",
         atomictemp=False,
         notindexed=False,
         backgroundclose=False,
         checkambig=False,
         auditpath=True,
         makeparentdirs=True,
     ):
         """Open ``path`` file, which is relative to vfs root.
 
         By default, parent directories are created as needed. Newly created
         directories are marked as "not to be indexed by the content indexing
         service", if ``notindexed`` is specified for "write" mode access.
         Set ``makeparentdirs=False`` to not create directories implicitly.
 
         If ``backgroundclose`` is passed, the file may be closed asynchronously.
         It can only be used if the ``self.backgroundclosing()`` context manager
         is active. This should only be specified if the following criteria hold:
 
         1. There is a potential for writing thousands of files. Unless you
            are writing thousands of files, the performance benefits of
            asynchronously closing files is not realized.
         2. Files are opened exactly once for the ``backgroundclosing``
            active duration and are therefore free of race conditions between
            closing a file on a background thread and reopening it. (If the
            file were opened multiple times, there could be unflushed data
            because the original file handle hasn't been flushed/closed yet.)
 
         ``checkambig`` argument is passed to atomictempfile (valid
         only for writing), and is useful only if target file is
         guarded by any lock (e.g. repo.lock or repo.wlock).
 
         To avoid file stat ambiguity forcibly, checkambig=True involves
         copying ``path`` file opened in "append" mode (e.g. for
         truncation), if it is owned by another. Therefore, use
         combination of append mode and checkambig=True only in limited
         cases (see also issue5418 and issue5584 for detail).
         """
         if auditpath:
             self._auditpath(path, mode)
         f = self.join(path)
 
         if b"b" not in mode:
             mode += b"b"  # for that other OS
 
         nlink = -1
         if mode not in (b'r', b'rb'):
             dirname, basename = util.split(f)
             # If basename is empty, then the path is malformed because it points
             # to a directory. Let the posixfile() call below raise IOError.
             if basename:
                 if atomictemp:
                     if makeparentdirs:
                         util.makedirs(dirname, self.createmode, notindexed)
                     return util.atomictempfile(
                         f, mode, self.createmode, checkambig=checkambig
                     )
                 try:
                     if b'w' in mode:
                         util.unlink(f)
                         nlink = 0
                     else:
                         # nlinks() may behave differently for files on Windows
                         # shares if the file is open.
                         with util.posixfile(f):
                             nlink = util.nlinks(f)
                             if nlink < 1:
                                 nlink = 2  # force mktempcopy (issue1922)
                 except (OSError, IOError) as e:
                     if e.errno != errno.ENOENT:
                         raise
                     nlink = 0
                     if makeparentdirs:
                         util.makedirs(dirname, self.createmode, notindexed)
                 if nlink > 0:
                     if self._trustnlink is None:
                         self._trustnlink = nlink > 1 or util.checknlink(f)
                     if nlink > 1 or not self._trustnlink:
                         util.rename(util.mktempcopy(f), f)
         fp = util.posixfile(f, mode)
         if nlink == 0:
             self._fixfilemode(f)
 
         if checkambig:
             if mode in (b'r', b'rb'):
                 raise error.Abort(
                     _(
                         b'implementation error: mode %s is not'
                         b' valid for checkambig=True'
                     )
                     % mode
                 )
             fp = checkambigatclosing(fp)
 
         if backgroundclose and isinstance(
             threading.current_thread(),
             threading._MainThread,  # pytype: disable=module-attr
         ):
             if (
                 not self._backgroundfilecloser  # pytype: disable=attribute-error
             ):
                 raise error.Abort(
                     _(
                         b'backgroundclose can only be used when a '
                         b'backgroundclosing context manager is active'
                     )
                 )
 
             fp = delayclosedfile(
                 fp,
                 self._backgroundfilecloser,  # pytype: disable=attribute-error
             )
 
         return fp
 
     def symlink(self, src, dst):
         self.audit(dst)
         linkname = self.join(dst)
         util.tryunlink(linkname)
 
         util.makedirs(os.path.dirname(linkname), self.createmode)
 
         if self._cansymlink:
             try:
                 os.symlink(src, linkname)
             except OSError as err:
                 raise OSError(
                     err.errno,
                     _(b'could not symlink to %r: %s')
                     % (src, encoding.strtolocal(err.strerror)),
                     linkname,
                 )
         else:
             self.write(dst, src)
 
     def join(self, path, *insidef):
         if path:
-            return os.path.join(self.base, path, *insidef)
+            parts = [self.base, path]
+            parts.extend(insidef)
+            return self._join(*parts)
         else:
             return self.base
 
 
 opener = vfs
 
 
 class proxyvfs(abstractvfs):
     def __init__(self, vfs):
         self.vfs = vfs
 
     def _auditpath(self, path, mode):
         return self.vfs._auditpath(path, mode)
 
     @property
     def options(self):
         return self.vfs.options
 
     @options.setter
     def options(self, value):
         self.vfs.options = value
 
 
 class filtervfs(proxyvfs, abstractvfs):
     '''Wrapper vfs for filtering filenames with a function.'''
 
     def __init__(self, vfs, filter):
         proxyvfs.__init__(self, vfs)
         self._filter = filter
 
     def __call__(self, path, *args, **kwargs):
         return self.vfs(self._filter(path), *args, **kwargs)
 
     def join(self, path, *insidef):
         if path:
             return self.vfs.join(self._filter(self.vfs.reljoin(path, *insidef)))
         else:
             return self.vfs.join(path)
 
 
 filteropener = filtervfs
 
 
 class readonlyvfs(proxyvfs):
     '''Wrapper vfs preventing any writing.'''
 
     def __init__(self, vfs):
         proxyvfs.__init__(self, vfs)
 
     def __call__(self, path, mode=b'r', *args, **kw):
         if mode not in (b'r', b'rb'):
             raise error.Abort(_(b'this vfs is read only'))
         return self.vfs(path, mode, *args, **kw)
 
     def join(self, path, *insidef):
         return self.vfs.join(path, *insidef)
 
 
 class closewrapbase(object):
     """Base class of wrapper, which hooks closing
 
     Do not instantiate outside of the vfs layer.
     """
 
     def __init__(self, fh):
         object.__setattr__(self, '_origfh', fh)
 
     def __getattr__(self, attr):
         return getattr(self._origfh, attr)
 
     def __setattr__(self, attr, value):
         return setattr(self._origfh, attr, value)
 
     def __delattr__(self, attr):
         return delattr(self._origfh, attr)
 
     def __enter__(self):
         self._origfh.__enter__()
         return self
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         raise NotImplementedError('attempted instantiating ' + str(type(self)))
 
     def close(self):
         raise NotImplementedError('attempted instantiating ' + str(type(self)))
 
 
 class delayclosedfile(closewrapbase):
     """Proxy for a file object whose close is delayed.
 
     Do not instantiate outside of the vfs layer.
     """
 
     def __init__(self, fh, closer):
         super(delayclosedfile, self).__init__(fh)
         object.__setattr__(self, '_closer', closer)
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         self._closer.close(self._origfh)
 
     def close(self):
         self._closer.close(self._origfh)
 
 
 class backgroundfilecloser(object):
     """Coordinates background closing of file handles on multiple threads."""
 
     def __init__(self, ui, expectedcount=-1):
         self._running = False
         self._entered = False
         self._threads = []
         self._threadexception = None
 
         # Only Windows/NTFS has slow file closing. So only enable by default
         # on that platform. But allow to be enabled elsewhere for testing.
         defaultenabled = pycompat.iswindows
         enabled = ui.configbool(b'worker', b'backgroundclose', defaultenabled)
 
         if not enabled:
             return
 
         # There is overhead to starting and stopping the background threads.
         # Don't do background processing unless the file count is large enough
         # to justify it.
         minfilecount = ui.configint(b'worker', b'backgroundcloseminfilecount')
         # FUTURE dynamically start background threads after minfilecount closes.
         # (We don't currently have any callers that don't know their file count)
         if expectedcount > 0 and expectedcount < minfilecount:
             return
 
         maxqueue = ui.configint(b'worker', b'backgroundclosemaxqueue')
         threadcount = ui.configint(b'worker', b'backgroundclosethreadcount')
 
         ui.debug(
             b'starting %d threads for background file closing\n' % threadcount
         )
 
         self._queue = pycompat.queue.Queue(maxsize=maxqueue)
         self._running = True
 
         for i in range(threadcount):
             t = threading.Thread(target=self._worker, name='backgroundcloser')
             self._threads.append(t)
             t.start()
 
     def __enter__(self):
         self._entered = True
         return self
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         self._running = False
 
         # Wait for threads to finish closing so open files don't linger for
         # longer than lifetime of context manager.
         for t in self._threads:
             t.join()
 
     def _worker(self):
         """Main routine for worker thread."""
         while True:
             try:
                 fh = self._queue.get(block=True, timeout=0.100)
                 # Need to catch or the thread will terminate and
                 # we could orphan file descriptors.
                 try:
                     fh.close()
                 except Exception as e:
                     # Stash so can re-raise from main thread later.
                     self._threadexception = e
             except pycompat.queue.Empty:
                 if not self._running:
                     break
 
     def close(self, fh):
         """Schedule a file for closing."""
         if not self._entered:
             raise error.Abort(
                 _(b'can only call close() when context manager active')
             )
 
         # If a background thread encountered an exception, raise now so we fail
         # fast. Otherwise we may potentially go on for minutes until the error
         # is acted on.
         if self._threadexception:
             e = self._threadexception
             self._threadexception = None
             raise e
 
         # If we're not actively running, close synchronously.
         if not self._running:
             fh.close()
             return
 
         self._queue.put(fh, block=True, timeout=None)
 
 
 class checkambigatclosing(closewrapbase):
     """Proxy for a file object, to avoid ambiguity of file stat
 
     See also util.filestat for detail about "ambiguity of file stat".
 
     This proxy is useful only if the target file is guarded by any
     lock (e.g. repo.lock or repo.wlock)
 
     Do not instantiate outside of the vfs layer.
     """
 
     def __init__(self, fh):
         super(checkambigatclosing, self).__init__(fh)
         object.__setattr__(self, '_oldstat', util.filestat.frompath(fh.name))
 
     def _checkambig(self):
         oldstat = self._oldstat
         if oldstat.stat:
             _avoidambig(self._origfh.name, oldstat)
 
     def __exit__(self, exc_type, exc_value, exc_tb):
         self._origfh.__exit__(exc_type, exc_value, exc_tb)
         self._checkambig()
 
     def close(self):
         self._origfh.close()
         self._checkambig()

tests/test-annotate.t

@@ -1,1202 +1,1202 b''
   $ cat >> "$HGRCPATH" << EOF
   > [ui]
   > merge = :merge3
   > EOF
 
 init
 
   $ hg init repo
   $ cd repo
 
 commit
 
   $ echo 'a' > a
   $ hg ci -A -m test -u nobody -d '1 0'
   adding a
 
 annotate -c
 
   $ hg annotate -c a
   8435f90966e4: a
 
 annotate -cl
 
   $ hg annotate -cl a
   8435f90966e4:1: a
 
 annotate -d
 
   $ hg annotate -d a
   Thu Jan 01 00:00:01 1970 +0000: a
 
 annotate -n
 
   $ hg annotate -n a
   0: a
 
 annotate -nl
 
   $ hg annotate -nl a
   0:1: a
 
 annotate -u
 
   $ hg annotate -u a
   nobody: a
 
 annotate -cdnu
 
   $ hg annotate -cdnu a
   nobody 0 8435f90966e4 Thu Jan 01 00:00:01 1970 +0000: a
 
 annotate -cdnul
 
   $ hg annotate -cdnul a
   nobody 0 8435f90966e4 Thu Jan 01 00:00:01 1970 +0000:1: a
 
 annotate (JSON)
 
   $ hg annotate -Tjson a
   [
    {
     "lines": [{"line": "a\n", "rev": 0}],
     "path": "a"
    }
   ]
 
   $ hg annotate -Tjson -cdfnul a
   [
    {
     "lines": [{"date": [1.0, 0], "line": "a\n", "lineno": 1, "node": "8435f90966e442695d2ded29fdade2bac5ad8065", "path": "a", "rev": 0, "user": "nobody"}],
     "path": "a"
    }
   ]
 
 log-like templating
 
   $ hg annotate -T'{lines % "{rev} {node|shortest}: {line}"}' a
   0 8435: a
 
 '{lineno}' field should be populated as necessary
 
   $ hg annotate -T'{lines % "{rev}:{lineno}: {line}"}' a
   0:1: a
   $ hg annotate -Ta a \
   > --config templates.a='"{lines % "{rev}:{lineno}: {line}"}"'
   0:1: a
 
   $ cat <<EOF >>a
   > a
   > a
   > EOF
   $ hg ci -ma1 -d '1 0'
   $ hg cp a b
   $ hg ci -mb -d '1 0'
   $ cat <<EOF >> b
   > b4
   > b5
   > b6
   > EOF
   $ hg ci -mb2 -d '2 0'
 
 default output of '{lines}' should be readable
 
   $ hg annotate -T'{lines}' a
   0: a
   1: a
   1: a
   $ hg annotate -T'{join(lines, "\n")}' a
   0: a
   
   1: a
   
   1: a
 
 several filters can be applied to '{lines}'
 
   $ hg annotate -T'{lines|json}\n' a
   [{"line": "a\n", "rev": 0}, {"line": "a\n", "rev": 1}, {"line": "a\n", "rev": 1}]
   $ hg annotate -T'{lines|stringify}' a
   0: a
   1: a
   1: a
   $ hg annotate -T'{lines|count}\n' a
   3
 
 annotate multiple files (JSON)
 
   $ hg annotate -Tjson a b
   [
    {
     "lines": [{"line": "a\n", "rev": 0}, {"line": "a\n", "rev": 1}, {"line": "a\n", "rev": 1}],
     "path": "a"
    },
    {
     "lines": [{"line": "a\n", "rev": 0}, {"line": "a\n", "rev": 1}, {"line": "a\n", "rev": 1}, {"line": "b4\n", "rev": 3}, {"line": "b5\n", "rev": 3}, {"line": "b6\n", "rev": 3}],
     "path": "b"
    }
   ]
 
 annotate multiple files (template)
 
   $ hg annotate -T'== {path} ==\n{lines % "{rev}: {line}"}' a b
   == a ==
   0: a
   1: a
   1: a
   == b ==
   0: a
   1: a
   1: a
   3: b4
   3: b5
   3: b6
 
 annotate -n b
 
   $ hg annotate -n b
   0: a
   1: a
   1: a
   3: b4
   3: b5
   3: b6
 
 annotate --no-follow b
 
   $ hg annotate --no-follow b
   2: a
   2: a
   2: a
   3: b4
   3: b5
   3: b6
 
 annotate -nl b
 
   $ hg annotate -nl b
   0:1: a
   1:2: a
   1:3: a
   3:4: b4
   3:5: b5
   3:6: b6
 
 annotate -nf b
 
   $ hg annotate -nf b
   0 a: a
   1 a: a
   1 a: a
   3 b: b4
   3 b: b5
   3 b: b6
 
 annotate -nlf b
 
   $ hg annotate -nlf b
   0 a:1: a
   1 a:2: a
   1 a:3: a
   3 b:4: b4
   3 b:5: b5
   3 b:6: b6
 
   $ hg up -C 2
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ cat <<EOF >> b
   > b4
   > c
   > b5
   > EOF
   $ hg ci -mb2.1 -d '2 0'
   created new head
   $ hg merge
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ cat b
   a
   a
   a
   <<<<<<< working copy: 5fbdc1152d97 - test: b2.1
   b4
   c
   b5
   ||||||| base
   =======
   b4
   b5
   b6
   >>>>>>> merge rev:    37ec9f5c3d1f - test: b2
   $ cat <<EOF > b
   > a
   > a
   > a
   > b4
   > c
   > b5
   > EOF
   $ hg resolve --mark -q
   $ rm b.orig
   $ hg ci -mmergeb -d '3 0'
 
 annotate after merge
 
   $ hg annotate -nf b
   0 a: a
   1 a: a
   1 a: a
   3 b: b4
   4 b: c
   3 b: b5
 
 annotate after merge with -l
 
   $ hg annotate -nlf b
   0 a:1: a
   1 a:2: a
   1 a:3: a
   3 b:4: b4
   4 b:5: c
   3 b:5: b5
 
   $ hg up -C 1
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg cp a b
   $ cat <<EOF > b
   > a
   > z
   > a
   > EOF
   $ hg ci -mc -d '3 0'
   created new head
 Work around the pure version not resolving the conflict like native code
 #if pure
   $ hg merge
   merging b
   warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ cat <<EOF > b
   > a
   > z
   > a
   > b4
   > c
   > b5
   > EOF
   $ hg resolve -m b
   (no more unresolved files)
   $ rm b.orig
 #else
   $ hg merge
   merging b
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
 #endif
   $ echo d >> b
   $ hg ci -mmerge2 -d '4 0'
 
 annotate after rename merge
 
   $ hg annotate -nf b
   0 a: a
   6 b: z
   1 a: a
   3 b: b4
   4 b: c
   3 b: b5
   7 b: d
 
 annotate after rename merge with -l
 
   $ hg annotate -nlf b
   0 a:1: a
   6 b:2: z
   1 a:3: a
   3 b:4: b4
   4 b:5: c
   3 b:5: b5
   7 b:7: d
 
 --skip nothing (should be the same as no --skip at all)
 
   $ hg annotate -nlf b --skip '1::0'
   0 a:1: a
   6 b:2: z
   1 a:3: a
   3 b:4: b4
   4 b:5: c
   3 b:5: b5
   7 b:7: d
 
 --skip a modified line. Note a slight behavior difference in pure - this is
 because the pure code comes up with slightly different deltas internally.
 
   $ hg annotate -nlf b --skip 6
   0 a:1: a
   1 a:2* z (no-pure !)
   0 a:1* z (pure !)
   1 a:3: a
   3 b:4: b4
   4 b:5: c
   3 b:5: b5
   7 b:7: d
 
 --skip added lines (and test multiple skip)
 
   $ hg annotate -nlf b --skip 3
   0 a:1: a
   6 b:2: z
   1 a:3: a
   1 a:3* b4
   4 b:5: c
   1 a:3* b5
   7 b:7: d
 
   $ hg annotate -nlf b --skip 4
   0 a:1: a
   6 b:2: z
   1 a:3: a
   3 b:4: b4
   1 a:3* c
   3 b:5: b5
   7 b:7: d
 
   $ hg annotate -nlf b --skip 3 --skip 4
   0 a:1: a
   6 b:2: z
   1 a:3: a
   1 a:3* b4
   1 a:3* c
   1 a:3* b5
   7 b:7: d
 
   $ hg annotate -nlf b --skip 'merge()'
   0 a:1: a
   6 b:2: z
   1 a:3: a
   3 b:4: b4
   4 b:5: c
   3 b:5: b5
   3 b:5* d
 
 --skip everything -- use the revision the file was introduced in
 
   $ hg annotate -nlf b --skip 'all()'
   0 a:1: a
   0 a:1* z
   0 a:1* a
   0 a:1* b4
   0 a:1* c
   0 a:1* b5
   0 a:1* d
 
 Issue2807: alignment of line numbers with -l
 
   $ echo more >> b
   $ hg ci -mmore -d '5 0'
   $ echo more >> b
   $ hg ci -mmore -d '6 0'
   $ echo more >> b
   $ hg ci -mmore -d '7 0'
   $ hg annotate -nlf b
    0 a: 1: a
    6 b: 2: z
    1 a: 3: a
    3 b: 4: b4
    4 b: 5: c
    3 b: 5: b5
    7 b: 7: d
    8 b: 8: more
    9 b: 9: more
   10 b:10: more
 
 linkrev vs rev
 
   $ hg annotate -r tip -n a
   0: a
   1: a
   1: a
 
 linkrev vs rev with -l
 
   $ hg annotate -r tip -nl a
   0:1: a
   1:2: a
   1:3: a
 
 Issue589: "undelete" sequence leads to crash
 
 annotate was crashing when trying to --follow something
 
 like A -> B -> A
 
 generate ABA rename configuration
 
   $ echo foo > foo
   $ hg add foo
   $ hg ci -m addfoo
   $ hg rename foo bar
   $ hg ci -m renamefoo
   $ hg rename bar foo
   $ hg ci -m renamebar
 
 annotate after ABA with follow
 
   $ hg annotate --follow foo
   foo: foo
 
 missing file
 
   $ hg ann nosuchfile
   abort: nosuchfile: no such file in rev e9e6b4fa872f
   [255]
 
 annotate file without '\n' on last line
 
   $ printf "" > c
   $ hg ci -A -m test -u nobody -d '1 0'
   adding c
   $ hg annotate c
   $ printf "a\nb" > c
   $ hg ci -m test
   $ hg annotate c
   [0-9]+: a (re)
   [0-9]+: b (re)
 
 Issue3841: check annotation of the file of which filelog includes
 merging between the revision and its ancestor
 
 to reproduce the situation with recent Mercurial, this script uses (1)
 "hg debugsetparents" to merge without ancestor check by "hg merge",
 and (2) the extension to allow filelog merging between the revision
 and its ancestor by overriding "repo._filecommit".
 
   $ cat > ../legacyrepo.py <<EOF
   > from __future__ import absolute_import
   > from mercurial import commit, error, extensions
   > def _filecommit(orig, repo, fctx, manifest1, manifest2,
   >                 linkrev, tr, includecopymeta, ms):
   >     fname = fctx.path()
   >     text = fctx.data()
   >     flog = repo.file(fname)
   >     fparent1 = manifest1.get(fname, repo.nullid)
   >     fparent2 = manifest2.get(fname, repo.nullid)
   >     meta = {}
   >     copy = fctx.copysource()
   >     if copy and copy != fname:
   >         raise error.Abort('copying is not supported')
   >     if fparent2 != repo.nullid:
   >         return flog.add(text, meta, tr, linkrev,
   >                         fparent1, fparent2), 'modified'
   >     raise error.Abort('only merging is supported')
   > def uisetup(ui):
   >     extensions.wrapfunction(commit, '_filecommit', _filecommit)
   > EOF
 
   $ cat > baz <<EOF
   > 1
   > 2
   > 3
   > 4
   > 5
   > EOF
   $ hg add baz
   $ hg commit -m "baz:0"
 
   $ cat > baz <<EOF
   > 1 baz:1
   > 2
   > 3
   > 4
   > 5
   > EOF
   $ hg commit -m "baz:1"
 
   $ cat > baz <<EOF
   > 1 baz:1
   > 2 baz:2
   > 3
   > 4
   > 5
   > EOF
   $ hg debugsetparents 17 17
   $ hg --config extensions.legacyrepo=../legacyrepo.py  commit -m "baz:2"
   $ hg debugindexdot baz
   digraph G {
   	-1 -> 0
   	0 -> 1
   	1 -> 2
   	1 -> 2
   }
   $ hg annotate baz
   17: 1 baz:1
   18: 2 baz:2
   16: 3
   16: 4
   16: 5
 
   $ cat > baz <<EOF
   > 1 baz:1
   > 2 baz:2
   > 3 baz:3
   > 4
   > 5
   > EOF
   $ hg commit -m "baz:3"
 
   $ cat > baz <<EOF
   > 1 baz:1
   > 2 baz:2
   > 3 baz:3
   > 4 baz:4
   > 5
   > EOF
   $ hg debugsetparents 19 18
   $ hg --config extensions.legacyrepo=../legacyrepo.py  commit -m "baz:4"
   $ hg debugindexdot baz
   digraph G {
   	-1 -> 0
   	0 -> 1
   	1 -> 2
   	1 -> 2
   	2 -> 3
   	3 -> 4
   	2 -> 4
   }
   $ hg annotate baz
   17: 1 baz:1
   18: 2 baz:2
   19: 3 baz:3
   20: 4 baz:4
   16: 5
 
 annotate clean file
 
   $ hg annotate -ncr "wdir()" foo
   11 472b18db256d : foo
 
 annotate modified file
 
   $ echo foofoo >> foo
   $ hg annotate -r "wdir()" foo
   11 : foo
   20+: foofoo
 
   $ hg annotate -cr "wdir()" foo
   472b18db256d : foo
   b6bedd5477e7+: foofoo
 
   $ hg annotate -ncr "wdir()" foo
   11 472b18db256d : foo
   20 b6bedd5477e7+: foofoo
 
   $ hg annotate --debug -ncr "wdir()" foo
   11 472b18db256d1e8282064eab4bfdaf48cbfe83cd : foo
   20 b6bedd5477e797f25e568a6402d4697f3f895a72+: foofoo
 
   $ hg annotate -udr "wdir()" foo
   test Thu Jan 01 00:00:00 1970 +0000: foo
   test [A-Za-z0-9:+ ]+: foofoo (re)
 
   $ hg annotate -ncr "wdir()" -Tjson foo
   [
    {
     "lines": [{"line": "foo\n", "node": "472b18db256d1e8282064eab4bfdaf48cbfe83cd", "rev": 11}, {"line": "foofoo\n", "node": "ffffffffffffffffffffffffffffffffffffffff", "rev": 2147483647}],
     "path": "foo"
    }
   ]
 
 annotate added file
 
   $ echo bar > bar
   $ hg add bar
   $ hg annotate -ncr "wdir()" bar
   20 b6bedd5477e7+: bar
 
 annotate renamed file
 
   $ hg rename foo renamefoo2
   $ hg annotate -ncr "wdir()" renamefoo2
   11 472b18db256d : foo
   20 b6bedd5477e7+: foofoo
 
 annotate missing file
 
   $ rm baz
 
   $ hg annotate -ncr "wdir()" baz
-  abort: $TESTTMP\repo\baz: $ENOENT$ (windows !)
+  abort: $TESTTMP\repo/baz: $ENOENT$ (windows !)
   abort: $ENOENT$: '$TESTTMP/repo/baz' (no-windows !)
   [255]
 
 annotate removed file
 
   $ hg rm baz
 
   $ hg annotate -ncr "wdir()" baz
-  abort: $TESTTMP\repo\baz: $ENOENT$ (windows !)
+  abort: $TESTTMP\repo/baz: $ENOENT$ (windows !)
   abort: $ENOENT$: '$TESTTMP/repo/baz' (no-windows !)
   [255]
 
   $ hg revert --all --no-backup --quiet
   $ hg id -n
   20
 
 Test followlines() revset; we usually check both followlines(pat, range) and
 followlines(pat, range, descend=True) to make sure both give the same result
 when they should.
 
   $ echo a >> foo
   $ hg ci -m 'foo: add a'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5)'
   16: baz:0
   19: baz:3
   20: baz:4
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, startrev=20)'
   16: baz:0
   19: baz:3
   20: baz:4
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, startrev=19)'
   16: baz:0
   19: baz:3
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, startrev=19, descend=True)'
   19: baz:3
   20: baz:4
   $ printf "0\n0\n" | cat - baz > baz1
   $ mv baz1 baz
   $ hg ci -m 'added two lines with 0'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, descend=true, startrev=19)'
   19: baz:3
   20: baz:4
   $ echo 6 >> baz
   $ hg ci -m 'added line 8'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, startrev=19, descend=1)'
   19: baz:3
   20: baz:4
   $ sed 's/3/3+/' baz > baz.new
   $ mv baz.new baz
   $ hg ci -m 'baz:3->3+'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7, descend=0)'
   16: baz:0
   19: baz:3
   20: baz:4
   24: baz:3->3+
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:5, startrev=17, descend=True)'
   19: baz:3
   20: baz:4
   24: baz:3->3+
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 1:2, descend=false)'
   22: added two lines with 0
 
 file patterns are okay
   $ hg log -T '{rev}: {desc}\n' -r 'followlines("path:baz", 1:2)'
   22: added two lines with 0
 
 renames are followed
   $ hg mv baz qux
   $ sed 's/4/4+/' qux > qux.new
   $ mv qux.new qux
   $ hg ci -m 'qux:4->4+'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(qux, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   24: baz:3->3+
   25: qux:4->4+
 
 but are missed when following children
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7, startrev=22, descend=True)'
   24: baz:3->3+
 
 merge
   $ hg up 24 --quiet
   $ echo 7 >> baz
   $ hg ci -m 'one more line, out of line range'
   created new head
   $ sed 's/3+/3-/' baz > baz.new
   $ mv baz.new baz
   $ hg ci -m 'baz:3+->3-'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   24: baz:3->3+
   27: baz:3+->3-
   $ hg merge 25
   merging baz and qux to qux
   warning: conflicts while merging qux! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ cat qux
   0
   0
   1 baz:1
   2 baz:2
   <<<<<<< working copy: 863de62655ef - test: baz:3+->3-
   3- baz:3
   4 baz:4
   ||||||| base
   3+ baz:3
   4 baz:4
   =======
   3+ baz:3
   4+ baz:4
   >>>>>>> merge rev:    cb8df70ae185 - test: qux:4->4+
   5
   6
   7
   $ cat > qux <<EOF
   > 0
   > 0
   > 1 baz:1
   > 2 baz:2
   > 3- baz:3
   > 4 baz:4
   > 5
   > 6
   > 7
   > EOF
   $ hg resolve --mark -q
   $ rm qux.orig
   $ hg ci -m merge
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(qux, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   24: baz:3->3+
   25: qux:4->4+
   27: baz:3+->3-
   28: merge
   $ hg up 25 --quiet
   $ hg merge 27
   merging qux and baz to qux
   warning: conflicts while merging qux! (edit, then use 'hg resolve --mark')
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
   [1]
   $ cat qux
   0
   0
   1 baz:1
   2 baz:2
   <<<<<<< working copy: cb8df70ae185 - test: qux:4->4+
   3+ baz:3
   4+ baz:4
   ||||||| base
   3+ baz:3
   4 baz:4
   =======
   3- baz:3
   4 baz:4
   >>>>>>> merge rev:    863de62655ef - test: baz:3+->3-
   5
   6
   7
   $ cat > qux <<EOF
   > 0
   > 0
   > 1 baz:1
   > 2 baz:2
   > 3+ baz:3
   > 4+ baz:4
   > 5
   > 6
   > EOF
   $ hg resolve --mark -q
   $ rm qux.orig
   $ hg ci -m 'merge from other side'
   created new head
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(qux, 5:7)'
   16: baz:0
   19: baz:3
   20: baz:4
   24: baz:3->3+
   25: qux:4->4+
   27: baz:3+->3-
   29: merge from other side
   $ hg up 24 --quiet
 
 we are missing the branch with rename when following children
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 5:7, startrev=26, descend=True)'
   27: baz:3+->3-
 
 we follow all branches in descending direction
   $ hg up 23 --quiet
   $ sed 's/3/+3/' baz > baz.new
   $ mv baz.new baz
   $ hg ci -m 'baz:3->+3'
   created new head
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 2:5, startrev=16, descend=True)' --graph
   @  30: baz:3->+3
   :
   : o  27: baz:3+->3-
   : :
   : o  24: baz:3->3+
   :/
   o    20: baz:4
   |\
   | o  19: baz:3
   |/
   o  18: baz:2
   :
   o  16: baz:0
   |
   ~
 
 Issue5595: on a merge changeset with different line ranges depending on
 parent, be conservative and use the surrounding interval to avoid loosing
 track of possible further descendants in specified range.
 
   $ hg up 23 --quiet
   $ hg cat baz -r 24
   0
   0
   1 baz:1
   2 baz:2
   3+ baz:3
   4 baz:4
   5
   6
   $ cat > baz << EOF
   > 0
   > 0
   > a
   > b
   > 3+ baz:3
   > 4 baz:4
   > y
   > z
   > EOF
   $ hg ci -m 'baz: mostly rewrite with some content from 24'
   created new head
   $ hg merge --tool :merge-other 24
   merging baz
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ hg ci -m 'merge forgetting about baz rewrite'
   $ cat > baz << EOF
   > 0
   > 0
   > 1 baz:1
   > 2+ baz:2
   > 3+ baz:3
   > 4 baz:4
   > 5
   > 6
   > EOF
   $ hg ci -m 'baz: narrow change (2->2+)'
   $ hg log -T '{rev}: {desc}\n' -r 'followlines(baz, 3:4, startrev=20, descend=True)' --graph
   @  33: baz: narrow change (2->2+)
   |
   o    32: merge forgetting about baz rewrite
   |\
   | o  31: baz: mostly rewrite with some content from 24
   | :
   | : o  30: baz:3->+3
   | :/
   +---o  27: baz:3+->3-
   | :
   o :  24: baz:3->3+
   :/
   o    20: baz:4
   |\
   ~ ~
 
 An integer as a line range, which is parsed as '1:1'
 
   $ hg log -r 'followlines(baz, 1)'
   changeset:   22:2174d0bf352a
   user:        test
   date:        Thu Jan 01 00:00:00 1970 +0000
   summary:     added two lines with 0
   
 
 check error cases
   $ hg up 24 --quiet
   $ hg log -r 'followlines()'
   hg: parse error: followlines takes at least 1 positional arguments
   [10]
   $ hg log -r 'followlines(baz)'
   hg: parse error: followlines requires a line range
   [10]
   $ hg log -r 'followlines(baz, x)'
   hg: parse error: followlines expects a line number or a range
   [10]
   $ hg log -r 'followlines(baz, 1:2, startrev=desc("b"))'
   hg: parse error: followlines expects exactly one revision
   [10]
   $ hg log -r 'followlines("glob:*", 1:2)'
   hg: parse error: followlines expects exactly one file
   [10]
   $ hg log -r 'followlines(baz, 1:)'
   hg: parse error: line range bounds must be integers
   [10]
   $ hg log -r 'followlines(baz, :1)'
   hg: parse error: line range bounds must be integers
   [10]
   $ hg log -r 'followlines(baz, x:4)'
   hg: parse error: line range bounds must be integers
   [10]
   $ hg log -r 'followlines(baz, 5:4)'
   hg: parse error: line range must be positive
   [10]
   $ hg log -r 'followlines(baz, 0:4)'
   hg: parse error: fromline must be strictly positive
   [10]
   $ hg log -r 'followlines(baz, 2:40)'
   abort: line range exceeds file size
   [10]
   $ hg log -r 'followlines(baz, 2:4, startrev=20, descend=[1])'
   hg: parse error at 43: not a prefix: [
   (followlines(baz, 2:4, startrev=20, descend=[1])
                                               ^ here)
   [10]
   $ hg log -r 'followlines(baz, 2:4, startrev=20, descend=a)'
   hg: parse error: descend argument must be a boolean
   [10]
 
 Test empty annotate output
 
   $ printf '\0' > binary
   $ touch empty
   $ hg ci -qAm 'add binary and empty files'
 
   $ hg annotate binary empty
   binary: binary file
 
   $ hg annotate -Tjson binary empty
   [
    {
     "path": "binary"
    },
    {
     "lines": [],
     "path": "empty"
    }
   ]
 
 Test annotate with whitespace options
 
   $ cd ..
   $ hg init repo-ws
   $ cd repo-ws
   $ cat > a <<EOF
   > aa
   > 
   > b b
   > EOF
   $ hg ci -Am "adda"
   adding a
   $ sed 's/EOL$//g' > a <<EOF
   > a  a
   > 
   >  EOL
   > b  b
   > EOF
   $ hg ci -m "changea"
 
 Annotate with no option
 
   $ hg annotate a
   1: a  a
   0: 
   1:  
   1: b  b
 
 Annotate with --ignore-space-change
 
   $ hg annotate --ignore-space-change a
   1: a  a
   1: 
   0:  
   0: b  b
 
 Annotate with --ignore-all-space
 
   $ hg annotate --ignore-all-space a
   0: a  a
   0: 
   1:  
   0: b  b
 
 Annotate with --ignore-blank-lines (similar to no options case)
 
   $ hg annotate --ignore-blank-lines a
   1: a  a
   0: 
   1:  
   1: b  b
 
   $ cd ..
 
 Annotate with orphaned CR (issue5798)
 -------------------------------------
 
   $ hg init repo-cr
   $ cd repo-cr
 
   $ cat <<'EOF' >> "$TESTTMP/substcr.py"
   > import sys
   > from mercurial.utils import procutil
   > procutil.setbinary(sys.stdin)
   > procutil.setbinary(sys.stdout)
   > stdin = getattr(sys.stdin, 'buffer', sys.stdin)
   > stdout = getattr(sys.stdout, 'buffer', sys.stdout)
   > stdout.write(stdin.read().replace(b'\r', b'[CR]'))
   > EOF
 
   >>> with open('a', 'wb') as f:
   ...     f.write(b'0a\r0b\r\n0c\r0d\r\n0e\n0f\n0g') and None
   $ hg ci -qAm0
   >>> with open('a', 'wb') as f:
   ...     f.write(b'0a\r0b\r\n1c\r1d\r\n0e\n1f\n0g') and None
   $ hg ci -m1
 
   $ hg annotate -r0 a | "$PYTHON" "$TESTTMP/substcr.py"
   0: 0a[CR]0b[CR]
   0: 0c[CR]0d[CR]
   0: 0e
   0: 0f
   0: 0g
   $ hg annotate -r1 a | "$PYTHON" "$TESTTMP/substcr.py"
   0: 0a[CR]0b[CR]
   1: 1c[CR]1d[CR]
   0: 0e
   1: 1f
   0: 0g
 
   $ cd ..
 
 Annotate with linkrev pointing to another branch
 ------------------------------------------------
 
 create history with a filerev whose linkrev points to another branch
 
   $ hg init branchedlinkrev
   $ cd branchedlinkrev
   $ echo A > a
   $ hg commit -Am 'contentA'
   adding a
   $ echo B >> a
   $ hg commit -m 'contentB'
   $ hg up --rev 'desc(contentA)'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ echo unrelated > unrelated
   $ hg commit -Am 'unrelated'
   adding unrelated
   created new head
   $ hg graft -r 'desc(contentB)'
   grafting 1:fd27c222e3e6 "contentB"
   $ echo C >> a
   $ hg commit -m 'contentC'
   $ echo W >> a
   $ hg log -G
   @  changeset:   4:072f1e8df249
   |  tag:         tip
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     contentC
   |
   o  changeset:   3:ff38df03cc4b
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     contentB
   |
   o  changeset:   2:62aaf3f6fc06
   |  parent:      0:f0932f74827e
   |  user:        test
   |  date:        Thu Jan 01 00:00:00 1970 +0000
   |  summary:     unrelated
   |
   | o  changeset:   1:fd27c222e3e6
   |/   user:        test
   |    date:        Thu Jan 01 00:00:00 1970 +0000
   |    summary:     contentB
   |
   o  changeset:   0:f0932f74827e
      user:        test
      date:        Thu Jan 01 00:00:00 1970 +0000
      summary:     contentA
   
 
 Annotate should list ancestor of starting revision only
 
   $ hg annotate a
   0: A
   3: B
   4: C
 
   $ hg annotate a -r 'wdir()'
   0 : A
   3 : B
   4 : C
   4+: W
 
 Even when the starting revision is the linkrev-shadowed one:
 
   $ hg annotate a -r 3
   0: A
   3: B
 
   $ cd ..
 
 Issue5360: Deleted chunk in p1 of a merge changeset
 
   $ hg init repo-5360
   $ cd repo-5360
   $ echo 1 > a
   $ hg commit -A a -m 1
   $ echo 2 >> a
   $ hg commit -m 2
   $ echo a > a
   $ hg commit -m a
   $ hg update '.^' -q
   $ echo 3 >> a
   $ hg commit -m 3 -q
   $ hg merge 2 -q
   warning: conflicts while merging a! (edit, then use 'hg resolve --mark')
   [1]
   $ cat a
   <<<<<<< working copy: 0a068f0261cf - test: 3
   1
   2
   3
   ||||||| base
   1
   2
   =======
   a
   >>>>>>> merge rev:    9409851bc20a - test: a
   $ cat > a << EOF
   > b
   > 1
   > 2
   > 3
   > a
   > EOF
   $ hg resolve --mark -q
   $ rm a.orig
   $ hg commit -m m
   $ hg annotate a
   4: b
   0: 1
   1: 2
   3: 3
   2: a
 
   $ cd ..