bugzilla: use util.urlreq.urlparse And stop saving a module variable because it shouldn't be necessary.

pycompat: define urlreq.urlparse and urlreq.unparse aliases Currently, we export urlparse via util.urlparse then call util.urlparse.urlparse() and util.urlparse.urlunparse() in a few places. This is the only url* module exported from pycompat, making it a one-off. So let's transition to urlreq to match everything else. Yes, we double import "urlparse" now on Python 2. This will be cleaned up in a subsequent patch. Also, the Python 3 functions trade in str/unicode not bytes. So we'll likely need to write a custom implementation that speaks bytes. But moving everyone to an abstracted API is a good first step.

pycompat: remove urlunquote alias It is duplicated by urlreq.unquote and is unused. Kill it. We retain the imports because it is re-exported via util.urlparse, which is used elsewhere. Since we no longer access attributes of urlparse at module load time, this change /should/ result in that module reverting to a lazy module.

util: use urlreq.unquote pycompat.urlreq.unquote and pycompat.urlunquote effectively alias the same thing. pycompat.urlunquote is only used once in the code base. So let's switch to urlreq.unquote. "Effectively" in the above paragraph is because pycompat.urlreq.unquote aliases urllib.unquote and pycompat.urlunquote aliases urlparse.unquote on Python 2. You might think one of urllib.unquote and urlparse.unquote is an alias to the other, but you would be incorrect. In fact, these functions are copies of each other. There is even a comment in the CPython source code saying to keep them in sync. You can't make this up.

pycompat: alias urlreq.unquote to unquote_to_bytes Previously, urlreq.unquote aliased to urllib.parse.unquote, which returned a str/unicode. We like bytes, so switch urlreq.unquote to dispatch to urllib.parse.unquote_to_bytes. This required a minor helper function to register an alias under a different name from which it points. If this turns into a common pattern, we could likely teach _registeralias to accept tuple values defining the mapping. Until then, I didn't feel like adding complexity to _registeralias.

revsetlang: portably turn int into bytestring

osutil: export a "getfstype" method This patch exports the "getfstype" method. So we can use it to enable hardlinks for known safe filesystems. The patch was tested manually via debugshell on a Linux system. "mercurial.osutil.getfstype" works as expected. It's hard to mount filesystem on user-space easily. I will add a test for real hardlink support to indirectly test this patch, after turning on real hardlinks support for certain whitelisted filesystems.

osutil: add a C function getting filesystem type Currently it only has Linux filesystems, according to my Linux manpage, built at 2016-03-15. The code uses "if" instead of "switch" because there could be some duplicated values.

setup: test some header files The next patch will use "statfs", which requires different header files on different platforms. Linux: sys/vfs.h or sys/statfs.h FreeBSD or OSX: sys/param.h and sys/mount.h Therefore test them so we can include the correct ones.

setup: detect statfs statfs is not defined by POSIX but is available in various systems to help decide filesystem type. Let's detect it and set the macro HAVE_STATFS.

setup: add a function to test header files

setup: split "hasfunction" to test arbitrary code The next patch wants to test include files.

rebase: add flag to require destination In some mercurial workflows, the default destination for rebase does not always work well and can lead to confusing behavior. With this flag enabled, every rebase command will require passing an explicit destination, eliminating this confusion.

update: add flag to require update destination In some mercurial workflows, the default destination for update does not always work well and can lead to confusing behavior. With this flag enabled, every update command will require passing an explicit destination, eliminating this confusion.

mq: reject new patch name containing leading/trailing whitespace We could create a patch of such name, but it wouldn't be processed properly by mq as parseseries() strips leading/trailing whitespace. The test of default message (added by b9a16ed5acec) is no longer be useful so removed. This issue was reported as: https://bitbucket.org/tortoisehg/thg/issues/4693/

shelve: rename stripnodes to nodestoprune Since we are introducing obs-based shelve, we are no longer stripping temporary nodes, we are obsoleting them. Therefore it looks like stipnodes would be a misleading name, while prune has a connotaion of "strip but with obsolescense", so nodestoprune seems like a good rename.

shelve: add an ability to write key-val data to a new type of shelve files Obsolescense-based shelve only needs metadata stored in .hg/shelved and if feels that this metadata should be stored in a simplekeyvaluefile format for potential extensibility purposes. I want to avoid storing it in an unstructured text file where order of lines determines their semantical meanings (as now happens in .hg/shelvedstate. .hg/rebasestate and I suspect other state files as well). Not included in this series, I have ~30 commits, doubling test-shelve.t in size and testing almost every tested shelve usecase for obs-shelve. Here's the series for the curious now: http://pastebin.com/tGJKx0vM I would like to send it to the mailing list and get accepted as well, but: 1. it's big, so should I send like 6 patches a time or so? 2. instead of having a commit per test case, it more like a commit per some amount of copy-pasted code. I tried to keep it meaningful and named commits somewhat properly, but it is far from this list standards IMO. Any advice on how to get it in without turning it into a 100 commits and spending many days writing descriptions? 3. it makes test-shelve.t run for twice as long (and it is already a slow test). Newest test-shelve.r runs for ~1 minute.

scmutil: add a simple key-value file helper The purpose of the added class is to serve purposes like save files of shelve or state files of shelve, rebase and histedit. Keys of these files can be alphanumeric and start with letters, while values must not contain newlines. In light of Mercurial's reluctancy to use Python's json module, this tries to provide a reasonable alternative for a non-nested named data. Comparing to current approach of storing state in plain text files, where semantic meaning of lines of text is only determined by their oreder, simple key-value file allows for reordering lines and thus helps handle optional values. Initial use-case I see for this is obs-shelve's shelve files. Later we can possibly migrate state files to this approach. The test is in a new file beause I did not figure out where to put it within existing test suite. If you give me a better idea, I will gladly follow it.

graphlog: draw multiple edges towards null node (issue5440) Before, edge (r, null) was processed only once by newparents. However what we really need is just stripping the edge (null, null).

merge with stable

localrepo: use tryunlink

vfs: use tryunlink

server: use tryunlink

dirstate: use tryunlink

debug: use tryunlink

chgserver: use tryunlink

bookmarks: use tryunlink

shelve: use tryunlink

vfs: add tryunlink method Thoughout hg code, we see a pattern of attempting to remove a file and then catching and ignoring any errors due to a missing file in the calling code. Let's unify this pattern in a single implementation in the vfs layer.

util: use tryunlink in unlinkpath We just introduced a func to attempt a file removal. Start using it.