make-config-from-file.sh

#!/bin/sh
#
# Convert a file into a #defined string using bourne shell and awk.
#

# Check if the awk interpreter is available.
awk -- '' </dev/null >/dev/null 2>&1
if [ $? -ne 0 ]
then
    echo "This script depends on awk, which I cannot find" 1>&2
    exit 1
fi

# Check that the SYMBOL name to use was specified.
if [ "$#" -lt 1 ]
then
    echo "usage: $0 SYMBOL [file(s)]" 1>&2
    exit 1
fi

# Extract the SYMBOL name from the command line.
SYMBOL=$1
shift

# Process each specified file, or standard input.
awk -v "SYMBOL=$SYMBOL" -- '
BEGIN {
    printf("// This file is automatically generated - dont edit it\n");
    printf("#include \"Config.hpp\"\n");
    printf("class Config%s\n", SYMBOL);
    printf("{\n");
    printf("public:\n");
    printf("    Config%s() { Config::instance().registerDefaultConfig(\"%s\", config); }\n", SYMBOL, SYMBOL);
    printf("    static Config%s instance;\n", SYMBOL);
    printf("    static const char *config;\n");
    printf("};\n");
    printf("Config%s Config%s::instance;\n", SYMBOL, SYMBOL);
    printf("const char *Config%s::config =\n", SYMBOL);
    last = "who-there";
    seenFirst = 0;
}

// {
    gsub("\"", "\\\"");
    if (seenFirst != 0)
    {
        printf("\"%s\\n\"\\\n", last);
    }
    last = $0;
    seenFirst = 1;
}

END {
    printf("\"%s\\n\";\n", last);
}' "$@"

exit $?