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#! /bin/sh
#
# Generates bash_completion_nmh from man/mh-chart.man.
#
# This code is Copyright (c) 2016, by the authors of nmh.
# See the COPYRIGHT file in the root directory of the nmh
# distribution for complete copyright information.
mhchart=man/mh-chart.man
#### Extract switches for nmh program.
prog_switches() {
program=$1
#### Extract lines from just after .B program-name to just before
#### blank line, and then only those that start with .RB, e.g.,
#### .RB [ \-list " | " \-nolist ]
#### .RB " | " \-autoheaderencoding ]
#### .RB [ \-\|\-component
#### paste(1) needs the explicit - file on some platforms (Solaris)
awk '/^.B.*(\/| )'"$program"'/,/^$/ {
if (/^\.RB /) print
}' "$mhchart" | \
sed -e 's/\.RB //g' -e 's/\[//g' -e 's/\]//g' \
-e 's/\(\\\)*//g' -e 's/-|-/-/g' -e 's/" *| "//g' \
-e 's/^ *//' -e 's/ *$//' -e 's/ */ /g' | \
paste -s -d ' ' -
}
cat <<'EOF'
# bash completions for nmh commands -*- shell-script -*-
# This file was generated by etc/bash_completion_nmh-gen.
#
# This code is Copyright (c) 2016, by the authors of nmh.
# See the COPYRIGHT file in the root directory of the nmh
# distribution for complete copyright information.
#
# To use: source at a bash prompt or in an initialization file.
_nmh() {
local -a switches
COMPREPLY=()
#### Complete filenames.
compopt -o default
case ${COMP_WORDS[COMP_CWORD]} in
-*) case $1 in
EOF
#### Extract program names from lines such as:
#### .B %nmhlibexecdir%/install\-mh
#### .B new \-mode fnext
programs=`grep '\.B [^\-]' "$mhchart" | \
sed -e 's/^\.B //' -e 's/ .*//' -e 's|%[^%]*%/||' -e 's/\\-/-/'`
for program in $programs; do
switches=`prog_switches "$program"`
# Support mime as alias for mhbuild.
[ "$program" = mhbuild ] && program='mhbuild|mime'
printf ' %s) switches=(%s) ;;\n' "$program" "$switches"
done
programs="$programs mime"
cat <<'EOF'
esac ;;
+*) switches=($(folder -all -fast -recurse | sed 's/^/+/')) ;;
#### Complete special message names, except after -file. The compopt -o default above provides filename completions. Assume that -file was fully completed, so don't need to match -fil, etc.
[flc.np]*) [ ${COMP_CWORD:-0} -lt 2 -o ${COMP_WORDS[$(($COMP_CWORD - 1))]} != -file ] &&
switches=(first last cur . next prev) ;;
esac
#### Special case: add "new" to mhpath's completions.
[ $1 = mhpath ] && switches=("${switches[*]}" + new)
COMPREPLY=($(compgen -W "${switches[*]}" -- ${COMP_WORDS[COMP_CWORD]}))
}
EOF
#### There better not be an nmh program name with whitespace in it.
echo complete -F _nmh $programs
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