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|
#! /bin/sh
#
# c2z - environment conversion tool
# Contributed by Bart Schaefer
# (Tweaked a bit by Paul Falstad)
# (Tweaked again by Bart Schaefer)
#
# This is a quick script to convert csh aliases to zsh aliases/functions.
# It also converts the csh environment and local variables to zsh. c2z
# uses the csh to parse its own dot-files, then processes csh output to
# convert the csh settings to zsh.
#
# When run as a zsh function, c2z runs csh as if it were an interactive
# shell whenever the parent zsh is interactive. When run as a shell
# script, the -i switch can be used to force this behavior.
#
# The -l (login) switch causes csh to run as if it were a login shell.
# This is done "properly" if c2z is used as a zsh function, otherwise
# it's faked by explicitly sourcing .login. Use with caution if your
# .login initializes an X server or does other one-time-only startup
# procedures.
#
# usage:
# c2z [-i | -l | filename]
#
# You can use this script in your .zshrc or .zlogin files to load your
# regular csh environment into zsh; for example, in .zlogin:
#
# . =(c2z -l)
#
# This is not perfect, but it gets most common aliases and variables.
# It's also rather time-consuming to do this every time you log in.
# However, if you're moving from csh to zsh for the first time, this
# can get you started with a familiar environment right away.
#
# In case your mailer eats tabs, $T is set to expand to a tab.
#
T="`echo x | tr x '\011'`"
# If we're zsh, we can run "- csh" to get the complete environment.
#
MINUS=""
LOADFILE=""
INTERACT=""
CSH=csh
case "$ZSH_NAME$ZSH_VERSION$VERSION" in
zsh*)
case $1 in
-l*) MINUS="-" ;;
-i*) INTERACT="-i" ;;
*) LOADFILE="source $1" CSH="csh -f";;
esac
if [[ -o INTERACTIVE ]]; then INTERACT="-i"; fi
setopt nobanghist
;;
*)
case $1 in
-l*) LOADFILE="source ~/.login" ;;
-i*) INTERACT="-i" ;;
*) LOADFILE="source $1" CSH="csh -f";;
esac
;;
esac
( eval $MINUS $CSH $INTERACT ) <<EOF 2>&1 >/dev/null
$LOADFILE
alias >! /tmp/cz$$.a
setenv >! /tmp/cz$$.e
set >! /tmp/cz$$.v
EOF
# save stdin
exec 9<&0
# First convert aliases
exec < /tmp/cz$$.a
# Taken straight from ctoz except for $T and "alias --"
sed -e 's/'"$T"'(\(.*\))/'"$T"'\1/' >/tmp/cz$$.1
grep ! /tmp/cz$$.1 >/tmp/cz$$.2
grep -v ! /tmp/cz$$.1 >/tmp/cz$$.3
sed -e "s/'/'"\\\\"''"/g \
-e 's/^\([^'"$T"']*\)'"$T"'\(.*\)$/alias -- \1='"'\2'/" \
/tmp/cz$$.3
sed -e 's/>\(&*\)!/>\1|/g' \
-e 's/!\*:q/"$@"/g' \
-e 's/\(![:#]*[^'"$T"']*\):q/"\1"/g' \
-e 's/!\([-0-9][0-9]*\)\(:x\)*/$\2(fc -nl \1)/g' \
-e 's/\$:x(fc/$=(fc/g' \
-e 's/![:#]*\([^'"$T"']\)/$==\1/g' \
-e 's/\$=\(=[^'"$T"']*\):x/$\1/g' \
-e 's/\$cwd/$PWD/' \
-e 's/^\([^'"$T"']*\)'"$T"'\(.*\)$/\1 () { \2 }/' \
/tmp/cz$$.2
# Next, convert environment variables
exec < /tmp/cz$$.e
# Would be nice to deal with embedded newlines, e.g. in TERMCAP, but ...
sed -e '/^SHLVL/d' \
-e '/^PWD/d' \
-e '/^_=/d' \
-e "s/'/'"\\\\"''"/g \
-e "s/^\([A-Za-z0-9_]*=\)/export \1'/" \
-e "s/$/'/"
# Finally, convert local variables
exec < /tmp/cz$$.v
sed -e 's/'"$T"'/=/' \
-e "s/'/'"\\\\"''"/g \
-e '/^[A-Za-z0-9_]*=[^(]/{
s/=/='"'/"'
s/$/'"'/"'
}' |
sed -e '/^argv=/d' -e '/^cwd=/d' -e '/^filec=/d' -e '/^status=/d' \
-e '/^autolist=/s/.*/setopt autolist/' \
-e '/^correct=all/s//setopt correctall/' \
-e '/^correct=/s//setopt correct/' \
-e '/^histchars=/s//HISTCHARS=/' \
-e '/^history=/s//HISTSIZE=/' \
-e '/^home=/s//HOME=/' \
-e '/^ignoreeof=/s/.*/setopt ignoreeof/' \
-e '/^noclobber=/s/.*/setopt noclobber/' \
-e '/^notify=/d' \
-e '/^prompt=/s/!/%h/' \
-e 's/^prompt/PROMPT/' \
-e '/^showdots=/s/.*/setopt globdots/' \
-e '/^savehist=/s//HISTFILE=\~\/.zhistory SAVEHIST=/' \
-e '/^who=/s//WATCHFMT=/'
exec 0<&9
rm /tmp/cz$$.?
exit
|
