Fossil Wrapper

namespace eval config {
    set aliases {}
    set filters {};             # registered filters
    set commands {};            # registered interceptors

    proc init {filename} {
        set myname $::argv0
        if {[file exists $filename] && [file mtime $filename] > [file mtime $myname]} {
        #if {[file exists $filename] } {}
	    # an existing config file is used only if it is _newer_ than the
	    # running `fsl' file. otherwise the config file is (re)created
	    # since it's definition in `config::defaults' might have changed.
	    # this makes it probable that changes to this script become
	    # automatically active for other users (as long as they don't happen
	    # to manually modify there config files frequently ...)

proc alias?       {name} { dict exists $config::aliases  $name }

proc filter?      {name} { dict exists $config::filters  $name }

proc interceptor? {name} { dict exists $config::commands $name }


proc unwrapTimeline records {
#-----------------------------------------------------------------------
# unwrap `fossil timeline' output, putting each checkin on a single
# line. expected input: currently, a list of \n terminated lines.
# (maybe the \n should go away?). continuation lines belonging
# to the checkin message (including the trailing user/tags info)
# are identified by a leading indent of 10 blanks. all other

      }
   } 

   return $revnums
}

proc preparse argv {
# -------------------------------------------------------------------
# purpose: preprocessing of provided argument string by looking
# for `fsl' specific option/value arguments, which are eliminated
# from the argv string after the corresponding actions are performed.
# currently understands the following options:
#
#    --debug n : set global variable `dbglvl' to value n
# -------------------------------------------------------------------
   global dbglvl
   set dbglvl 0
  
   # check for presence of a `--debug n' option, if present, it
   # defines the debug level which controls how much additional
   # output is generated. after extraction of the debug level the
   # option and its value are eliminated from the argument string

    puts "Currently defined expansions:"
    dict for {alias expansion} $config::aliases {
        puts [format "%10s -> %s" $alias $expansion]
    }
}

interceptor df|gdf {
# ------------------------------------------------------------------------
# drop-in replacement for `fsl (g)di' using hg/svn-style relative revision
# numbers. call as
#
# fsl (g)df ... -r n(:m) ...
#
# where n, m are counting from 0 (initial checkin) and `...' denotes
# further `diff' arguments.
# This call is mapped to
#
# fsl (g)di ... -r sha1_n (--to sha1_m) ...
#
# where `sha1_n, sha1_m' are the sha1 hashes of the respective checkins.
# ------------------------------------------------------------------------
   # map this interceptor command to `fossil (g)diff'. actually, we use `di'
   # instead of `diff' since only the former will trigger the `diff' filter:
   regsub {^(g?d)f} $params {\1i} params

   # extract the revison number information from `params'. contrary to
   # `fossil' it is acceptable to omit blanks between `-r' and `n:m':
   set rgx { \-r[[:blank:]]*}