mercurial: add editorconfig Editorconfig (http://editorconfig.org/) is a file format helping define coding styles like spaces, tabs etc. It supports a wide range of editors. Some well- known projects like ruby and zsh are using it already. This patch adds a simple .editorconfig, making it clear we use 8-char tabs in C code, 4-char spaces in Python code, and we don't keep trailing spaces.

parsers: fix istat macro to work with single line if statement

pypy: fix setdiscovery test This test relies on the exact details of random.sample given the seed. Things work a bit differently under pypy, make the test less specific.

chg: wrap line at 80 chars This is a style fix. I was using tabstop=4 for some early patches, although I realized we use tabstop=8 later but these early style issues remains. Let's fix them.

chg: replace abortmsg showing errno with abortmsgerrno Since we have abortmsgerrno now, use it to show human friendly error messages across platforms.

chg: add util function abortmsgerrno to print error with errno It's common to abortmsg with the errno information. Let's make a utility function for it.

chg: use color in debug/error messages conditionally Before this patch, chg always uses color in its debugmsg and abortmsg and there is no way to turn it off. This patch adds a global flag to control whether chg should use color or not and only enables it when stderr is a tty and HGPLAIN is not set.

revset: force ascending order for baseset initialized from a set It is possible to initialize a baseset directly from a set object. However, in this case the iteration order was inherited from the set. Set have undefined iteration order (especially cpython and pypy will have different one) so we should not rely on it anywhere. Therefor we declare the baseset "ascending" to enforce a consistent iteration order. The sorting is done lazily by the baseset class and should have no performance impact when it does not matter. This makes test-revset.t pass with pypy.

revset: stabilize repr of baseset initialized with a set Cpython and pypy have different way to build and order set, so the result of list(myset) is different. We work around this by using the sorted version of the data when displaying a list. This get pypy closer to pass test-revset.t.

dispatch: factor out command failure handling into a function Moving the warning generation to a function allows for wrapping and alternative error handling.

pypy: fix overeager pattern matching on mpatchError Pypy have difference in error reporting.

mpatch: unify mpatchError (issue5182) The pure version was mpatch was throwing struct.error or ValueError for errors, whereas the C version was throwing an "mpatch.mpatchError". Introducing an mpatch.mpatchError into pure and using it consistently is fairly easy, but the actual form for it is mercurial.mpatch.mpatchError, so with this commit, we change the C implementation to match the naming convention too.

check-code: reject sed ... \\n This would have caught 142891ab6e89 (fixed by a5a13eeffc59) if repcomment didn't make the content of the perl code opaque to the check.

hideablerevs: expand docstring to warn about possible traps Sean Farley just wasted multiple hours trying to figure out why his code was crashing. We update the docstring to make the constraint clearer.

hghave: replace relative import of docutils.core

tests: make tinyproxy.py not import sys.argv by name

tests: alias ui as uimod in test-walkrepo

tests: alias ui as uimod in test-ui-config

tests: alias ui as uimod in test-context

tests: alias ui as uimod in test-ancestor

tests: sort import lines in tinyproxy.py

tests: sort import lines in failfilemerge.py

tests: sort import lines in dumbhttp.py This series is an attempt to enable import-checker.py for tests/**.py, but it turned out not easy. Since many tests have been ported to absolute_import without the coverage, import-checker.py reports a lot of errors right now. Should we enable import-checker.py without fixing all of them so that we won't get more errors?

chgserver: change random state after fork Before this patch, extensions expecting a different random state per command will break since the chg request handler will inherit a same random state from the parent daemon process. This patch addresses the issue by calling random.seed() after fork.

chg: make connect debug message less repetitive Before this patch, "connect to" debug message is printed repeatedly because a previous patch changed how the chg client decides the server is ready to be connected. This patch revises the places we print connect debug messages so they are less repetitive without losing useful information.

chgserver: use relative path at socket.bind Before this patch, if the server address is long, the server will fail to listen and throw the error: socket.error: AF_UNIX path too long It is because AF_UNIX path usually has a very short length limit (107 chars on common platforms, see sys/un.h). This patch addresses the issue by using relative path instead. Therefore the directory length does not matter. It helps run tests with chg using a long $TMPDIR.

chgserver: move args copying logic to the correct place A previous patch moved it to an incorrect place. Since dispatch._earlygetopt has side effects on args, we need to move it to the place before _earlygetopt.

py3: use print_function in test-status-inprocess.py

py3: use absolute_import in test-status-inprocess.py

py3: use print_function in test-revlog-ancestry.py