#!/bin/sh
# setup — configure, build, test, and install Comet without requiring root.
#
# Usage:
#   ./setup [key=value ...]
#   ./setup help
#
# Options are passed to meson setup as -Dkey=value.
# If prefix= is not supplied, defaults to ~/ircd.
# The build directory is always 'build'.

set -e

die() { echo "ERROR: $*" >&2; exit 1; }

command -v meson >/dev/null 2>&1 || die "meson not found in PATH"

BUILDDIR="build"

if [ $# -eq 1 ] && [ "$1" = "help" ]; then
    echo "Usage: ./setup [key=value ...]"
    echo ""
    echo "Available options (from meson_options.txt):"
    echo ""
    OPTFILE="$(dirname "$0")/meson_options.txt"
    [ -f "$OPTFILE" ] || die "meson_options.txt not found"
    awk '
        { gsub(/\r/, ""); line = $0 }
        /option\(/ {
            block = line
            next
        }
        block != "" {
            block = block " " line
        }
        block != "" && /\)/ {
            # name
            s = block; sub(/.*option\('"'"'/, "", s); sub(/'"'"'.*/, "", s)
            name = s

            # description
            s = block; sub(/.*description:[[:space:]]*'"'"'/, "", s); sub(/'"'"'.*/, "", s)
            desc = s

            # default value (string/boolean/feature)
            defval = ""
            s = block
            if (match(s, /value:[[:space:]]*'"'"'[^'"'"']*'"'"'/)) {
                v = substr(s, RSTART, RLENGTH)
                sub(/value:[[:space:]]*'"'"'/, "", v); sub(/'"'"'.*/, "", v)
                defval = v
            } else if (match(s, /value:[[:space:]]*[0-9]+/)) {
                v = substr(s, RSTART, RLENGTH)
                sub(/value:[[:space:]]*/, "", v)
                defval = v
            } else if (match(s, /value:[[:space:]]*(true|false)/)) {
                v = substr(s, RSTART, RLENGTH)
                sub(/value:[[:space:]]*/, "", v)
                defval = v
            }

            printf "  %-20s %s", name, desc
            if (defval != "") printf " (default: %s)", defval
            printf "\n"
            block = ""
            name = ""
        }
    ' "$OPTFILE"
    echo ""
    echo "Example: ./setup topiclen=390 nicklen=30 prefix=/opt/ircd"
    exit 0
fi

has_prefix=0
MESON_OPTS=""

for arg in "$@"; do
    case "$arg" in
        prefix=*)  has_prefix=1; MESON_OPTS="$MESON_OPTS -D$arg" ;;
        *=*)       MESON_OPTS="$MESON_OPTS -D$arg" ;;
        *)         die "Unrecognised argument '$arg' (expected key=value)" ;;
    esac
done

if [ "$has_prefix" -eq 0 ]; then
    DEFAULT_PREFIX="$HOME/ircd"
    echo "No prefix= given; defaulting to $DEFAULT_PREFIX"
    MESON_OPTS="$MESON_OPTS -Dprefix=$DEFAULT_PREFIX"
    mkdir -p "$DEFAULT_PREFIX"
else
    for arg in "$@"; do
        case "$arg" in
            prefix=*) mkdir -p "${arg#prefix=}" ;;
        esac
    done
fi

echo "==> meson setup $BUILDDIR $MESON_OPTS"
meson setup "$BUILDDIR" --optimization 2 $MESON_OPTS

echo "==> meson compile -C $BUILDDIR"
meson compile -C "$BUILDDIR"

echo "==> meson test -C $BUILDDIR"
meson test -C "$BUILDDIR"

echo "==> meson install -C $BUILDDIR"
exec meson install -C "$BUILDDIR"