4cade/bin/buildaction.sh

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#!/bin/bash
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games=$(cat "$1")
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# make temp file with just the key/value pairs (strip blank lines, comments, eof marker)
records=$(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="$key"
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line=$(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)
displayname=$(echo "$line" | awk -F= '{ print $2 }')
echo "!byte ${#key}+${#value}+${#displayname}+5" # OKVS record length
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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\""
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echo "!byte $((needsjoystick*128))+$((needs128k*64))"
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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"