log: fix handling of root (or empty) path provided by matcher (issue6478)

procutil: extend gui test to detect wayland session (issue6479)

chg: format code by clang-format version 11.0.1-+rc1-1

test-check-interface: do not expect bare "python" executable exists

procutil: assign pseudo file object if sys.stdout/stderr is missing

procutil: introduce pseudo file object that just raises EBADF

dispatch: gate against missing stdout/stderr

dispatch: remove stale comment about fdopen()-ed stdio

log: update documentation about --follow with/without --rev (issue6459)

test-extension: flush diagnostic message to stabilize chg output

log: do not accept string-matcher pattern as -u/-b/-B parameter

log: do not override other filtering and sorting options by --bookmark

scmutil: extract function that builds revset expr to select bookmark branch

scmutil: document that bookmarkrevs() ignores non-head bookmark branch

ui: remove excessive strtolocal() from debuguigetpass

diff: do not concatenate immutable bytes while building a/b bodies (issue6445)

chg: reset errno prior to calling strtol()

chg: do not close dir fd while iterating

chg: show debug message for each fd to be closed

chg: apply clang-format

chgserver: backport py3 buffered I/O workarounds from procutil

url: do not continue HTTP authentication with user=None (issue6425)

ui: fix echo back of ui.prompt() to not concatenate None as bytes

help: update command synopsis to clarify "cp --forget" only takes destinations

url: do not continue HTTP authentication with user=None (issue6425)

ui: fix echo back of ui.prompt() to not concatenate None as bytes

help: update command synopsis to clarify "cp --forget" only takes destinations

relnotes: add diffcontains() to new features list

revset: rename diff(pattern) to diffcontains(pattern)

stringutil: add function to compile stringmatcher pattern into regexp

revset: add diff(pattern) predicate for "grep --diff"

py3: fix stringmatcher() to byte-stringify exception message

stringutil: extract helper function that splits stringmatcher() pattern

grep: extract main search loop as searcher method

scmutil: move walkchangerevs() from cmdutil

grep: extract public function to register file to be skipped

revset: fix sorting key of wdir revision

grep: move prep() to grepsearcher class

grep: move readfile() to grepsearcher class

grep: move getbody() to grepsearcher class

grep: add stub class that maintains cache and states of grep operation

grep: move match and diff logic to new module

grep: explicitly pass regexp to closure functions

churn: leverage logcmdutil to filter revisions by --date

cmdutil: remove remainder of old walkchangerevs() implementation

cmdutil: rewrite walkchangerevs() by using logcmdutil functions

grep: filter target files by matcher

cmdutil: make walkchangerevs() call prepare with matcher instead of filenames

grep: add option for logcmdutil.makewalker() to not filter revs by file pats

log: extract function that builds (revs, makefilematcher) from walkopts

log: move --graph and topo sort options to walkopts

log: move miscellaneous filter/matcher options to walkopts

log: map --removed to walkopts.force_changelog_traversal

log: pass around --rev option by walkopts

log: pass around --follow/--follow-first options by walkopts

log: parse --limit option by logcmdutil.parseopts()

log: introduce struct that carries log traversal options

log: remove unused argument from _makerevset()

log: remove stale comment about order of user revset

share: do not write working-copy requirements twice

py3: fix formatting of LookupError for workingctx

grep: make -frREV follow history from the specified revision (BC)

grep: fix --follow with no --diff nor --rev to not fall back to plain grep

cmdutil: make walkchangerevs() gracefully handle wdir parents

test-grep: add tests for --follow with/without --diff and/or paths

grep: clarify that --all works exactly the same way as --diff

log: make -frREV PATH detect missing files before falling back to slow path

log: fix -fr'wdir()' PATH to follow newly added file

log: reorganize if-else and for loop in logcmdutil._makematcher()

merge with stable

cmdutil: reimplement finddate() without using walkchangerevs()

test-simple-update: add test for -d DATE option

largefiles: walk history in ascending order while downloading all lfiles

largefiles: replace use of walkchangerevs() with simple revset query

largefiles: remove unused 'rev' parameter from downloadlfiles()

log: fix crash and bad filematcher lookup by -fr'wdir()' PATH

grep: fix hash(linestate) to not include linenum

test-grep: document that trivially moved lines might not be detected

revset: remove indirect indexing of status tuple

grep: fix hash(linestate) to not include linenum

test-grep: document that trivially moved lines might not be detected

revset: remove indirect indexing of status tuple

dispatch: adjust ui.flush() timing to stabilize test-blackbox.t

chgserver: discard buffered output before restoring fds (issue6207)

hghave: fix possible int('') in has_clang_format()

phases: move short-lived PyObject pointers to local scope

phases: rename variable used for owned dict of phasesets

phases: make sure an exception should be set on error return

phases: leverage Py_BuildValue() to build PyInt and steal PyObject

phases: fix clang-format error

phases: fix error return with no exception from computephases()

osutil: fix excessive decref on tuple creation failure in listdir()

revlog: fix excessive decref on tuple creation failure in parse_index2()

dispatch: indent run() function

dispatch: handle late KeyboardInterrupt occurred in run()

debuginstall: don't translate encoding messages

cmdserver: document message-encodings and channel output options

cmdserver: add option to not exit from message loop on SIGINT

merge with stable