hgweb: make .info a block element by default Using a <div> instead of a <span> with "display: block" makes more sense. While at it, let's adjust top margin in monoblue so that text in .info doesn't overlap changeset "tags" elements (they are quite large in monoblue).

revlog: don't use slicing to return parents This is the only place we use a slice on index entries, which are currently tuples. In preparation for moving away from tuples, let's stop using slices so we don't have to implement that support on the new type. We also tweak the logic slightly so the exception only catches the IndexError on the index lookup, not on the index entry lookup. The old code should never have been buggy. But it was semantically wrong. Differential Revision: https://phab.mercurial-scm.org/D1764

tests: switch test from '--config ui.editor=~/foo' to HGEDITOR=~/foo The test is currently not testing anything, the '--config ui.editor=~/path' argument is apparently of lower priority than the HGEDITOR that run-tests.py is setting. Differential Revision: https://phab.mercurial-scm.org/D1809

revert: support reverting to hidden cset if directaccess config is set This patch adds support for reverting files to a hidden changeset if `experimental.directacess=True` is set. Differential Revision: https://phab.mercurial-scm.org/D1763

update: support updating to hidden cset if directaccess config is set This patch adds support for updating to a hidden changeset without using --hidden if `experimental.directacces=True` is set. The update command will print out a warning when updating to a hidden changeset saying: `updating to a hidden changeset <hash>` The warning is also printed when directaccess is not used and --hidden is passed which I think is good behaviour. Tests are added for the directaccess part and updated output of tests which have case of updating to hidden cset using `--hidden`. Differential Revision: https://phab.mercurial-scm.org/D1762

commands: check for empty rev before passing to scmutil.unhidehashlikerevs Differential Revision: https://phab.mercurial-scm.org/D1760

test-convert-cvs: change TZ=US/Hawaii to TZ=Pacific/Johnston The former was limited to be known on Linux and the test failed on FreeBSD and Solaris platforms. The newer is known on Linux, FreeBSD and Solaris.

osutil: implement getfsmountpoint() on BSD systems I don't have a BSD system handy to test this, but it looks simple enough from the man page.

debugfs: display the tested path and mount point of the filesystem, if known While implementing win32.getfstype(), I noticed that MSYS path mangling is getting in the way. Given a path \\host\share\dir: - If strong quoted, hg receives it unchanged, and it works as expected - If double quoted, it converts to \host\share\dir - If unquoted, it converts to \hostsharedir The second and third cases are problematic because those are valid paths relative to the current drive letter, so os.path.realpath() will expand it as such. The net effect is to silently turn a network path test into (typically) a "C:\" test. Additionally, the command hangs after printing out 'symlink: no' for the third case (but is interruptable with Ctrl + C). This path mangling only comes into play because of the command line arguments- it won't affect internally obtained paths. Therefore, the simplest thing to do is to provide feedback on what the command is acting on. I also added the mount point, because Windows supports nesting [1] volumes (see the examples in "Junction Points and Mounted Folders"), and it was a useful diagnostic for figuring out why the wrong filesystem was printed out in the cases above. I opted not to call os.path.realpath() on the path argument, to make it clearer that the mangling isn't being done by Mercurial. [1] https://msdn.microsoft.com/en-us/library/windows/desktop/aa364996(v=vs.85).aspx

util: add a function to show the mount point of the filesystem For now, this is Windows only, since Linux doesn't have the value in its statfs structure, and I don't have a BSD system to test with.

win32: split a utility function to obtain the volume out of getfstype() This is only done on Windows because it's simple enough to call statfs() on Unix. The goal is to display this in `hg debugfs`.

util: whitelist NTFS for hardlink creation (issue4580)

win32: implement util.getfstype() This will allow NTFS to be added to the hardlink whitelist, and resume creating hardlinks in transactions (which was disabled globally in 07a92bbd02e5; see also e5ce49a30146). I opted to report "cifs" for remote volumes because this shows in `hg debugfs`, which also reports that hardlinks are supported for these volumes. So being able to distinguish it from "unknown" seems useful. The documentation [1] seems to indicate that SMB isn't supported by these functions, but experimenting shows that mapped drives are reported as "NTFS" on Windows 7. I don't have a second Windows machine, but instead shared a temp directory on C:\. In this setup, both of the following were detected as 'cifs' with the explicit GetDriveType() check: Z:\repo>hg ci -A C:\>hg -R \\hostname\temp\repo ci -A # (without Z:\ being mapped) It looks like this is called 6 times to add and commit a single new file, so I'm a little surprised this isn't cached. [1] https://msdn.microsoft.com/en-us/library/windows/desktop/aa364993(v=vs.85).aspx

util: move getfstype() to the platform modules This makes room for implementing on Windows using ctypes.

graphlog: add another graph node type, unstable, using character "*" (BC)

largefiles: modernize how capabilities are added to the wire protocol See 982f13bef503, which came well after this code was originally written.

lfs: show a friendly message when pushing lfs to a server without lfs enabled Upfront disclaimer: I don't know anything about the wire protocol, and this was pretty much cargo-culted from largefiles, and then clonebundles, since it seems more modern. I was surprised that exchange.push() will ensure all of the proper requirements when exchanging between two local repos, but doesn't care when one is remote. All this new capability marker does is inform the client that the extension is enabled remotely. It may or may not contain commits with external blobs. Open issues: - largefiles uses 'largefiles=serve' for its capability. Someday I hope to be able to push lfs blobs to an `hg serve` instance. That will probably require a distinct capability. Should it change to '=serve' then? Or just add an 'lfs-serve' capability then? - The flip side of this is more complicated. It looks like largefiles adds an 'lheads' command for the client to signal to the server that the extension is loaded. That is then converted to 'heads' and sent through the normal wire protocol plumbing. A client using the 'heads' command directly is kicked out with a message indicating that the largefiles extension must be loaded. We could do similar with 'lfsheads', but then a repo with both largefiles and lfs blobs can't be pushed over the wire. Hopefully somebody with more wire protocol experience can think of something else. I see 'x-hgarg-1' on some commands in the tests, but not on heads, and didn't dig any further.

lfs: allow non-lfs exchanges when the extension is only enabled on one side Once the 'lfs' requirement is added, the extension must be loaded on both sides, and changegroup3 used. But there's no reason that I can see for bailing with cryptic errors if lfs is not required, but randomly enabled somewhere.

lfs: add the 'lfs' requirement in the changegroup transaction introducing lfs A hook like this is how largefiles manages to do the same. Largefiles uses a changegroup hook, but this uses pretxnchangegroup because that actually causes the transaction to rollback in the unlikely event that writing the requirements out fails. Sadly, the requires file itself isn't rolled back if a subsequent hook fails, but that seems trivial. Now that commit, changegroup and convert are covered, I don't think there's any way to get an lfs repo without the requirement. The grep exit code is blotted out of some test-lfs-serve.t tests now showing the requirement, because run-tests.py doesn't support conditionalizing the exit code.

test-lfs: add tests covering http exchanges This tries to test every combination of having the extension enabled/disabled on each side, and then push/pull/clone/identify lfs and non-lfs content. SSH is ignored here, because there's enough going on as it is. The root issue here is again that requirements are not exchanged and preserved on push/pull/clone. Doing so should eliminate the cryptic error messages when using `hg serve`. The 500 server error is triggered by "ValueError: no common changegroup version", because the extension forces changegroup3. Or, if changegroup3 is enabled manually, it is triggered by "abort: missing processor for flag '0x2000'!". Sadly, run-tests.py doesn't support conditionalizing the exit code like it does lines of output. Therefore, a couple of tests blot out the exit code by appending "|| true", since these failures will go away shortly anyway.

test-lfs: add tests covering local exchanges The root issue here is that requirements are not exchanged and preserved on push/pull. This can be handled with a changegroup hook. Testing for remote exchanges is much more extensive (it's possible for one process or the other to not have the extension loaded at all), so it is added separately.

smartset: split generatorset classes to avoid cycle I uncovered a cycle manifesting in a memory leak by running `hgperfrevset '::tip'`. The cycle was due to generatorset.__init__ assigning a bound method to self.__contains__. Internet sleuthing revealed that assigning a bound method to an instance attribute always creates a cycle. This commit creates two new variants of generatorset for the special cases of ascending and descending generators. The special implementations of __contains__ have been extracted to these classes where they are defined as __contains__. generatorset now implements __new__ and changes the spawned type to one of the new classes if needed. Differential Revision: https://phab.mercurial-scm.org/D1780

merge: raise before running mergedriver if using IMM Merge driver scripts run in the working copy, so disable with IMM for now. Differential Revision: https://phab.mercurial-scm.org/D1781

scmutil: use a tuple of possible values instead of using startswith() This patch also adds a review comment which is helpful as inline comment. Differential Revision: https://phab.mercurial-scm.org/D1761

show: use revlog function to compute length of the longest shortest node As the core part of shortest() was extracted at 448725a2ef73, we no logner need a templater.

commands: use the new API to access hidden changesets in various commands In previous patches, we have added an internal API to unhide hidden changesets. This patch makes the following command use that api in nowarn mode i.e. there will be no warning while accessing hidden changesets. cat, diff, export, files, heads, identify, log, manifest, parents, status This patch also adds test demonstarting the behaviour. .. feature:: Accessing hidden changesets Set config option 'experimental.directaccess = True' to access hidden changesets from read only commands. Differential Revision: https://phab.mercurial-scm.org/D1735

scmutil: add utility fn to return repo object with user passed revs unhidden There has been a need for accessing hidden changesets by default without passing --hidden. This is currently done using the directaccess extension but is bit hacky. This patch adds a utility function to return a repo object having user passed revisions unhidden. This functionality will live behind a config option and won't be the default behaviour. There is also a config option added by this patch which tells whether we want to unhide only those revisions whose hashes are passed or should we consider revisions numbers also. Differential Revision: https://phab.mercurial-scm.org/D1733

repoview: add a new filtername for accessing hidden commits This patch adds a new filter 'visible-hidden' for repository and will be used to return a repo object with user passed revisions unhidden. Unlike the directaccess extension in fb-hgext and previous series adding the functionality, this time we introduce only one new filter as whether to warn user or not is handled by scmutil.unhidehashlikerevs(). Differential Revision: https://phab.mercurial-scm.org/D1734

revsetlang: add utility function to return hash like symbols from the tree Functionalities like unhiding changesets whose rev/hash is passed by the user required the knowledge of rev/hashes in the user provided specs. This patch adds functions which can parse tree object and return a list of such values. Differential Revision: https://phab.mercurial-scm.org/D1732

repoview: add visibilityexception argument to filterrevs() and related fns After this patch, filterrevs() can take an optional argument visibilityexceptions which is a set of revs which should be exception to being hidden. The visibilityexceptions will be passed to the function computing hidden revisions for that filtername and are considered there while calculating the set of hidden revs. Differential Revision: https://phab.mercurial-scm.org/D1747