contrib/tcsh_completion_build.sh

performance: speedup computation of obsolete revisions

In their current state, revset calls can be very costly as we test
predicates on the entire repository. As obsolete computation is used
by the "hidden" filter, it needs to be very fast.

This changet drops the revset call in favor of direct testing of
the phase of a changeset.

Performance test on my Mercurial checkout

- 19857 total changesets,
- 1584 obsolete changesets,
- 13310 obsolescence markers.

Before:
  ! obsolete
  ! wall 0.047041

After:
  ! obsolete
  ! wall 0.004590


Performance test on a Mozilla central checkout:

- 117293 total changesets,
- 1 obsolete changeset,
- 1 obsolescence marker.

Before:
  ! obsolete
  ! wall 0.001539

After:
  ! obsolete
  ! wall 0.000017

#!/bin/sh

#
# tcsh_completion_build.sh - script to generate tcsh completion
#
#
# Copyright (C) 2005 TK Soh.
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
#
# Description
# -----------
# This script generates a tcsh source file to support completion
# of Mercurial commands and options.
#
# Instruction:
# -----------
# Run this script to generate the tcsh source file, and source
# the file to add command completion support for Mercurial.
#
#    tcsh% tcsh_completion.sh FILE
#    tcsh% source FILE
#
# If FILE is not specified, tcsh_completion will be generated.
#
# Bugs:
# ----
# 1. command specific options are not supported
# 2. hg commands must be specified immediately after 'hg'.
#

tcsh_file=${1-tcsh_completion}

hg_commands=`hg --debug help | \
        sed -e '1,/^list of commands:/d' \
            -e '/^enabled extensions:/,$d' \
            -e '/^additional help topics:/,$d' \
            -e '/^ [^ ]/!d; s/[,:]//g;' | \
        xargs -n5 | \
        sed -e '$!s/$/ \\\\/g; 2,$s/^ */    /g'`

hg_global_options=`hg -v help | \
        sed -e '1,/global/d;/^ *-/!d; s/ [^- ].*//' | \
        sed -e 's/ *$//; $!s/$/ \\\\/g; 2,$s/^ */    /g'`

hg_version=`hg version | sed -e '1q'`

script_name=`basename $0`

cat > $tcsh_file <<END
#
# tcsh completion for Mercurial
#
# This file has been auto-generated by $script_name for
# $hg_version
#
# Copyright (C) 2005 TK Soh.
#
# This is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#

complete hg \\
  'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \\
  'C/-/($hg_global_options)/' \\
  'p/1/($hg_commands)/'

END