ui: defer setting pager related properties until the pager has spawned When --pager=on is given, dispatch.py spawns a pager before setting up color. If the pager failed to launch, ui.pageractive was left set to True, so color configured itself based on 'color.pagermode'. A typical MSYS setting would be 'color.mode=auto, color.pagermode=ansi'. In the failure case, this would print a warning, disable the pager, and then print the raw ANSI codes to the terminal. Care needs to be taken, because it appears that leaving ui.pageractive=True was the only thing that prevented an attempt at running the pager again from inside the command. This results in a double warning message, so pager is simply disabled on failure. The ui config settings didn't need to be moved to fix this, but it seemed like the right thing to do for consistency.

color: stop mutating the default effects map A future change will make color.setup() callable a second time when the pager is spawned, in order to honor the 'color.pagermode' setting. The problem was that when 'color.mode=auto' was resolved to 'win32' in the first pass, the default ANSI effects were overwritten, making it impossible to honor 'pagermode=ansi'. Also, the two separate maps didn't have the same keys. The symmetric difference is 'dim' and 'italic' (from ANSI), and 'bold_background' (from win32). Thus, the update left entries that didn't belong for the current mode. This bled through `hg debugcolor`, where the unsupported ANSI keys were listed in 'win32' mode. As an added bonus, this now correctly enables color with MSYS `less` for a command like this, where pager is forced on: $ hg log --config color.pagermode=ansi --pager=yes --color=auto Previously, the output was corrupted. The raw output, as seen through the ANSI blind `more.com` was: <-[-1;6mchangeset: 34840:3580d1197af9<-[-1m ... which MSYS `less -FRX` rendered as: 1;6mchangeset: 34840:3580d1197af91m ... (The two '<-' instances were actually an arrow character that TortoiseHg warned couldn't be encoded, and notepad++ translated to a single '?'.) Returning an empty map for 'ui._colormode == None' seems better that defaulting to '_effects' (since some keys are mode dependent), and is better than None, which blows up `hg debugcolor --color=never`.

pager: do not read from environment variable $PAGER is converted to the pager.pager config item. So it's no longer necessary to read $PAGER in ui.pager().

ui: simplify geteditor Now $EDITOR and $VISUAL will affect ui.editor directly. So it's no longer necessary to test them in ui.geteditor.

debugconfig: list environment variables in debug output Since we print "read config from" for config files, printing environment variables will make it more consistent.

rcutil: let environ override system configs (BC) This is BC because system configs won't be able to override $EDITOR, $PAGER. The new behavior is arguably more rational.

rcutil: add a method to convert environment variables to config items Handling config and environ priorities has been messy. Partially because we don't have config layers - you either get all configs (sys + user), or none. Ideally, environ like $EDITOR, $PAGER should be able to override the system configs "ui.editor", "pager.pager". This patch provides the ability to convert them into config items, so they can be inserted into the middle config layer between system rc and user rc.

rcutil: let rccomponents return different types of configs (API) The next patches will convert environ to raw config items, and insert the config items between systemrcpath and userrcpath. This patch teaches rccomponents to return the type information so the caller could distinguish between "path" and raw config "items".

rcutil: rename rcpath to rccomponents (API)

rcutil: extract rc directory listing logic The logic of listing a ".rc" directory is duplicated in two functions, extract it to a single function to make the code cleaner.

rcutil: split osrcpath to return default.d paths (API) After this change, there are 3 rcpath functions: - defaultrcpath - systemrcpath - userrcpath This will allow us to insert another config layer in the middle.

rcutil: move scmutil.*rcpath to rcutil (API) As discussed at [1], the logic around "actual config"s seem to be non-trivial enough that it's worth a new module. This patch creates the module and move "scmutil.*rcpath" functions there as the first step. More methods will be moved to the module in the future. The module is different from config.py because the latter only cares about data structure and parsing, and does not care about special case, or system config paths, or environment variables. [1]: https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-March/095503.html

statfs: make getfstype() raise OSError It's better for getfstype() function to not suppress an error. Callers can handle it as necessary. Now "hg debugfsinfo" will report OSError.

statfs: rename pygetfstype to getfstype There's no ambiguity now.

statfs: refactor inner function as a mapping from statfs to string The major difference between BSD and Linux is how to get a fstype string. Let's split the longest part of getfstype() as a pure function.

statfs: simplify handling of return value Py_BuildValue() can translate NULL pointer to None.

hghave: use util.getfstype

runtests: change local IP glob pattern from "127.0.0.1" to "$LOCALIP" This is similar to what 348b2b9da703 does. Since 636cf3f7620d has changed "127.0.0.1" to "$LOCALIP". The glob pattern needs update accordingly. It is expected to fix tests running in some BSD jails.

tags: deprecated 'repo.tag' All user are gone. We can now celebrate the removal of some extra line from the 'localrepo' class.

drawdag: use 'tagsmod.tag' instead of 'repo.tag' The former is about to be deprecated.

tags: use the 'tag' function from the 'tags' module in the 'tag' command There is No need to go through the 'repo' object method anymore.

tags: move 'repo.tag' in the 'tags' module Similar logic, pretty much nobody use this method (that creates a tag) so we move it into the 'tags' module were it belong.

tags: move '_tags' from 'repo' to 'tags' module As far as I understand, that function do not needs to be on the local repository class, so we extract it in the 'tags' module were it will be nice and comfortable. We keep the '_' in the name since its only user will follow in the next changeset.

hgweb: filter diff hunks when 'linerange' and 'patch' are specified in filelog