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#!/bin/sh -e
# sdn-install: integrate sdn with the shell, binding to M-o
# vim: set sw=2 ts=2 sts=2 et tw=80:
zsh() {
cat <<'EOF'
sdn-navigate () {
# optionally: zle zle-line-finish
while eval "`SDN=1 sdn "$BUFFER" "$CURSOR"`"
do
[ -z "$cd" ] || cd "$cd"
[ -z "$insert" ] || LBUFFER="$LBUFFER$insert "
[ -z "$helper" ] && break
# Workaround for "zsh: suspended (tty output)" when invoking
# helpers after the terminal has been resized while running sdn
command true
/bin/sh -c "$helper" </dev/tty || break
done
# optionally: zle zle-line-init
zle reset-prompt
}
zle -N sdn-navigate
bindkey '\eo' sdn-navigate
EOF
}
bash() {
cat <<'EOF'
# We can't make the shell update the prompt on directory changes
# since there's no way to invoke `prompt_again()` from a `bind -x`
# handler but we can work around it by submitting a blank line.
sdn-cursor () {
if [[ $BASH_VERSINFO -lt 5 ]]
then echo -n "$SDN_L" | wc -m
else echo "$SDN_P"
fi
}
sdn-navigate () {
SDN_L=$READLINE_LINE SDN_P=$READLINE_POINT
READLINE_LINE=
while eval "`SDN=1 sdn "$SDN_L" "$(sdn-cursor)"`"
do
[[ -z $cd ]] || cd "$cd"
[[ -z $insert ]] || {
SDN_L="${SDN_L:0:$SDN_P}$insert ${SDN_L:$SDN_P}"
((SDN_P=SDN_P+${#insert}+1))
}
[[ -z $helper ]] && break
/bin/sh -c "$helper" || break
done
}
sdn-restore () {
READLINE_LINE=$SDN_L READLINE_POINT=$SDN_P
unset SDN_L SDN_P
}
# These never occur in UTF-8: \300-\301 \365-\367 \370-\377
bind -x '"\300": sdn-navigate'
bind -x '"\301": sdn-restore'
bind '"\eo": "\300\C-m\301"'
EOF
}
fish() {
cat <<'EOF'
function sdn-navigate
set --local IFS
set --local buffer (commandline)
set --local cursor (commandline --cursor)
while eval (SDN=1 sdn $buffer $cursor | \
string replace -ar '^(.*?)=' 'set --$1 ')
test -z "$cd" || cd "$cd"
test -z "$insert" || commandline --insert "$insert "
test -z "$helper" && break
/bin/sh -c "$helper" || break
end
commandline --function repaint
end
bind \eo sdn-navigate
EOF
}
elvish() {
cat <<'EOF'
edit:insert:binding[Alt-o] = {
use str
local:reesc = [posix]{ str:replace "'\\''" "''" $posix }
local:posix = [cmd]{ /bin/sh -c $cmd </dev/tty >/dev/tty 2>&1 }
# XXX: the -dot is not a stable API, and may hence break soon
local:buffer = $edit:current-command
local:cursor = (str:to-codepoints $buffer[0..$edit:-dot] | count)
local:ns = (ns [&])
while ?(eval ($reesc (E:SDN=1 sdn $buffer $cursor |
sed 's/^local //' | slurp)) &ns=$ns) {
if (not-eq $ns[cd] "") { cd $ns[cd] }
if (not-eq $ns[insert] "") { edit:insert-at-dot $ns[insert]" " }
if (or (eq $ns[helper] "") (not ?($posix $ns[helper]))) { break }
}
edit:redraw &full=$true
}
EOF
}
shell= path=
while getopts s:f:h opt
do
case $opt in
s) shell=$OPTARG;;
f) path=$OPTARG;;
*) echo "Usage: $0 [-s SHELL] [-f RCPATH | -]"; exit 2
esac
done
# Figure out the shell to integrate with
login=$(basename "$SHELL")
actual=$(ps -p $$ -o ppid= | xargs ps -o comm= -p)
if [ -z "$shell" ]
then
if [ "$login" != "$actual" ]
then
echo "Conflict between login ($login) and invoking ($actual) shell."
echo "Specify the shell with the -s option."
exit 1
fi
shell=$actual
fi
# Figure out the default initialisation file
case "$shell" in
zsh|bash)
rc=~/.${shell}rc;;
fish)
rc=${XDG_CONFIG_HOME:-$HOME/.config}/fish/conf.d/sdn.fish;;
elvish)
rc=~/.elvish/rc.elv;;
*)
echo "$shell is not supported."
exit 1
esac
# Just print out the snippet if requested
if [ "$path" = "-" ]
then
$shell
exit 0
fi
# Finally append to or update the appropriate file
b="# sdn-install begin"
e="# sdn-install end"
[ -z "$path" ] && path=$rc
mkdir -p "$(dirname "$path")"
touch "$path"
if ! grep -q "^$b" "$path" 2>/dev/null || ! grep -q "^$e" "$path" 2>/dev/null
then
printf "\n$b\n%s\n$e\n" "$($shell)" >> "$path"
echo "The snippet has been added to $path"
exit 0
fi
# POSIX-compliant in-place sed, trying to retain permissions here
temp=$path.sdn.new
cp -p -- "$path" "$temp"
sed < "$path" > "$temp" "/^$b/,/^$e/c\\
$b\\
$($shell | sed 's/\\/&&/g; s/$/\\/')
$e"
mv -- "$temp" "$path"
echo "The snippet in $path has been updated."
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