view TODO @ 820:89985a1b3427

Clean up walk and changes code to use normalised names properly.

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.

General:
- Better documentation
- More regression tests
- More specific try/except.
- less code duplication, more code in the right places
- python 2.2 support
- export to git
- Code cleanup: apply http://python.org/peps/pep-0008.html

Core:
- difflib creating/removing files (fixed except dates: should be epoch)
- directory foo.d or foo.i with existing file foo (use some quoting?)
- get various options from hgrc (e.g. history always -v, tip always -q)
- hg over https:// and rsync://
- hooks for new changesets getting pulled/imported etc.
- make showing removed files (in history etc.) faster.
- hgmerge error: merge should abort nicely and running it again should work
- if hardlinking fails, pull should be used
- .hgignore should use new patterns

Commands:
- hg add <directory> should work (currently only: hg add -I <dir>)
- hg status <filename>: file rev, changeset rev, changed, added,
  deleted, sha-1
- select to pull a subset of the heads
- commands.py: number of args too much magic (e.g. in import_())
- optionally only show merges (two parents)
- automatic pull fallback to old-http://
- hg pull http://foo tries hostname
  'foo?cmd=changegroup&roots=0000000000000000000000000000000000000000'
- pass options to ssh (debug/verbose/remote hg command etc.)
- create a commented .hg/hgrc on init/clone
- hg pull default in a subdir doesn't work, if it is a relative path
- hg clone should store corrected relative paths, so moving a directory
  containing related repositories works again
- mention synonyms (co, ci, ...) in help
- show global options in help
- if everyone knows 'hg clone': hg init [DIR]
- if everyone knows 'hg update -m': remove -t

Web:
- optionally only show merges (two parents)
- one hgweb with many repos (another script)
- hgweb tip link too long (URL?cmd=changelog;rev=)
- hgweb: shorter links (e.g. cs=... instead of cmd=changeset;node=...?)
- hgweb: deliver static files (e.g. favicon, stylesheets)
- hgweb personalization: timezone (display/change), display of
  features, number of entries per page
- some web servers think hgweb.cgi.[di] is a CGI script with old-http://
  (use quoting (see foo.d in Core) or document server configurations?)
- link children in hgweb
- allow verbose mode
- hide trivial parent (like in show_changeset)