#!/bin/sh

if [ $# -lt 1 ] ; then
    cat 1>&2 <<EOF
Usage: addln [PKGBUILD function] [line of bash]

Reads the PKGBUILD from standard input, adding a line at the end of the
specified bash function. The line can be empty to just add a newline.
EOF
    exit 1
fi

fname=$1
shift

awk -v fname="$fname" -v line="$*" '
match($0, "^[ \\t]*" fname "\\(\\)") { active = 1 }
active && match($0, /^[ ]+/) { indent = substr($0, 1, RLENGTH) }
active && /^}/ { active = 0; print indent "" line }
1
'