named branching is when you identify a head by a tag on an earlier revision.
This patch adds repo.branchlookup for searching through the tree to
find branch tags for heads.
hg update -b tag is added to checkout based on branch tags
hg heads -b is added to print the tag associated with each head
Prior to this, a file that did not exist was reported as showing up in
the filesystem, as were files of unsupported types (such as fifos).
Now, an error message is printed and nothing is returned in such cases.
This change also moves the commands.pathto function to the util module,
as the walk code needs it to print non-confusing error messages.
a list of files to look at. These end up with a src of 'f' from
walk() but no longer exist on the filesystem.
Index: mine/mercurial/commands.py
===================================================================
The repo walking code introduces a number of calls to dirstate.map.copy(),
significantly slowing down the walk on large trees. When a list of
files is passed to the walking code, we should only look at map entries
relevant to the file list passed in.
dirstate.filterfiles() is added to return a subset of the dirstate map.
The subset includes in files passed in, and if one of the files requested
is actually a directory, it includes any files inside that directory tree.
This brings the time for hg diff Makefile down from 1.7s to .3s on
a linux kernel repo.
Also, the diff command was unconditionally calling makewalk, leading
to an extra pass through repo.changes. This patch avoids the call
to makewalk when commands.diff isn't given a list of patterns, cutting
the time for hg diff (with no args) in half.
Index: mine/mercurial/hg.py
===================================================================
The first consequence of this is that absolute and relative paths now
all work in the same way. The second is that paths that lie outside
the repository now cause an error to be reported, instead of something
arbitrary and expensive being done.
Internally, all of the serious work is in the util package. The new
canonpath function takes an arbitrary path and either returns a
canonical path or raises an error. Because it needs to know where the
repository root is, it must be fed a repository or dirstate object, which
has given commands.matchpats and friends a new parameter to pass along.
The util.matcher function uses this to canonicalise globs and relative
path names.
Meanwhile, I've moved the Abort exception from commands to util, and
killed off the redundant util.CommandError exception.
Show command aliases in 'hg help something', unless in quiet mode.
Show short command description with 'hg help -q something'.
Show global options in verbose mode of command help.
State that Mercurial is a Distributed SCM.
When hg is executed without parameters ( or hg is executed with the
'help shortlist' command ) the short help list is displayed.
If the 'help' command is passed on the commandline the full help list
is displayed.
In both the cases if the switch '-v' is passed, the help contains also
the aliases of the short/full commands list and the global switches.
Added options -m, -a, -r and u to select files corresponding
to status M, A, R and ? respectively. If none of these
options are specified, files of all status will be shown.
commands.walk has been refactored. commands.walk's behaviour remains as
it was, but there is a new function, commands.makewalk. This returns
results that can be passed along to other internal code, in our case
dodiff.
New function: commands.pathto returns the relative path from one path
to another. For example, given foo/bar and baz/quux, it will return
../../baz/quux. This new function is used by the walk and status code
to print relative paths correctly.
New command: debugwalk exercises the walk code without doing anything
more.
hg.dirstate.walk now yields normalised names. For example, if you're
in the baz directory and you ask it to walk ../foo/bar/.., it will yield
names starting with foo/.
As a result of this change, all of the other walk and changes methods
in this module also return normalised names.
The util.matcher function now normalises globs and path names, so that
it will match normalised names properly.
Finally, util.matcher uses the non-glob prefix of a glob to tell walk
which directories to scan. Perviously, a glob like foo/* would scan
everything, but only return matches for foo/*. Now, foo/* only scans
under foo (using the globprefix function), which is much faster.
The code is slightly complicated by the need to commit all outstanding
changes in the repository if no file names are given (other commands
operate on the current directory and its subdirectories in this case).
localrepository.changes has acquired an optional match parameter, to let
it filter out include/exclude options.
When we switched to the new walk code for commands, we no longer passed a
list of specific files to the repo or dirstate walk or changes methods.
This meant that we always walked and attempted to match everything,
which was not efficient.
Now, if we are given any patterns to match, or nothing at all, we still
walk everything. But if we are given only file names that contain no
glob characters, we only walk those.
With no names, it now recursively forgets everything, as is the default
behaviour of other commands. And prints the names of all files it
hasn't specifically been told to forget.
When I rewrote addremove, I lazily put a call to repo.changes in,
which was unnecessary and slow. This is a new rewrite, preserving the
file name behaviour, but replacing the call to repo.changes with a walk,
which is much cheaper, and avoids calls to os.stat on all but files that
have probably been deleted.
It is now more verbose than it used to be. If given file names, it
prints nothing, as before. But if given patterns or nothing, it prints
the names of the files it is operating on, to remove that air of mystery.
It also now operates at or below the current directory.
