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#!/bin/bash
#
# This script converts a file's ASCII data into a C char array:
#
# const char script_gen[] = { ........ }
#
progress='.'
# Draw a loading bar given count and size
percent()
{
percent=$((200*$1/$2 % 2 + 100*$1/$2))
printf "\r%i%% 0x%02x " $((percent)) $3
len=$(($((70*$1)) / $2))
# Add a . if the % has progressed
if [ $((len)) -gt ${#progress} ]; then
progress="$progress."
fi
printf "$progress"
}
INPUT=$1
OUTPUT=$2
# uglifyjs seems to have vastly different options between versions,
# this should work with both
if which uglifyjs &> /dev/null; then
if uglifyjs --version &> /dev/null; then
uglifyjs $INPUT -nc -mt > /tmp/gen.tmp
else
uglifyjs -nc -mt $INPUT > /tmp/gen.tmp
fi
ERR=$?
if (($ERR > 0)); then
echo Error: Minification failed!
exit $ERR
fi
UGLIFY=1
else
cat $INPUT > /tmp/gen.tmp
UGLIFY=0
fi
COUNT=0
if [ "$(uname)" == "Darwin" ]; then
SIZE=$(stat -f%z "$INPUT")
FLAGS="-r -n 1"
else
SIZE=$(stat -c%s "$INPUT")
FLAGS="-r -N 1"
fi
printf "/* This file was auto-generated */\n\n" > $OUTPUT
printf "#include \"zjs_common.h\"\n\n" >> $OUTPUT
printf "const char *script_gen = \"" >> $OUTPUT
last_char=0
# No field separator, read whole file (IFS=),
# no backslash escape (-r),
# read 1 character at a time (-n1)
while IFS= read $FLAGS char
do
# Case for escaping a quote (") character
if [ "$char" = "\"" ]; then
printf "\\\\$char" >> $OUTPUT
elif [ "$last_char" = $'\\' ]; then
# Special case for new line and carrage return that can appear in a
# string e.g. print("some string\n");
# This is needed because BASH reads the "\n" as two characters, but
# in a C string it is just one character.
if [ "$char" = $'r' ] || [ "$char" = $'n' ]; then
printf "\\\\$char" >> $OUTPUT
fi
elif [ "$char" = $'\n' ]; then
if [ $UGLIFY -eq 0 ]; then
# Handle new lines if uglify is not installed
printf "\\\n\"\n\"" >> $OUTPUT
fi
else
echo -n "$char" >> $OUTPUT
fi
last_char=$char
COUNT=$((COUNT+1))
percent $COUNT $SIZE "'$char"
done < /tmp/gen.tmp
printf "\n"
# Terminate the string
printf "\";" >> $OUTPUT
rm -f /tmp/gen.tmp
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