4cade/bin/buildslideshow.sh

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#!/bin/bash
# flags
# -d include game display name (default off = display name will be 0-length string)
# parameters
# stdin - input containing slideshow (e.g. some file in res/SS/)
# stdout - binary OKVS data structure
# 1 - list of games with metadata (e.g. build/GAMES.CONF)
include_displayname=false
while getopts ":d" opt; do
case $opt in
d) include_displayname=true
;;
esac
done
shift $((OPTIND-1))
games=$(cat "$1")
# make temp file with just the key/value pairs (strip blank lines, comments, eof marker)
records=$(mktemp)
awk '!/^$|^#|^\[/' > "$records"
# make temp assembly source file that represents the binary OKVS data structure
source=$(mktemp)
(echo "*=0" # dummy program counter for assembler
echo "!le16 $(wc -l <"$records"), 0" # OKVS header
while IFS="=" read -r key value; do
[ -n "$value" ] && filename="$value" || filename="$key"
line=$(echo "$games" | awk '/,'"$filename"'=/')
needsjoystick=$(echo "$line" | cut -c1) # 'requires joystick' flag (0 or 1)
needs128k=$(echo "$line" | cut -c2) # 'requires 128K' flag (0 or 1)
if [ "$include_displayname" = false ]; then
displayname=""
else
displayname=$(echo "$line" | awk -F= '{ print $2 }')
fi
echo "!byte ${#key}+${#value}+${#displayname}+5" # OKVS record length
echo "!byte ${#key}" # OKVS key length
echo "!text \"$key\"" # OKVS key
echo "!byte ${#value}" # OKVS value length
echo "!text \"$value\"" # OKVS value
echo "!byte ${#displayname}"
echo "!text \"$displayname\""
echo "!byte $((needsjoystick*128))+$((needs128k*64))"
done < "$records") > "$source"
# assemble temp source file into binary OKVS data structure, then output that
out=$(mktemp)
acme -o "$out" "$source"
cat "$out"
# clean up
rm "$out"
rm "$source"
rm "$records"