paka

#!/usr/bin/env bash

set -e

INDIR=$(pwd)
OUTFILE=$(basename "$1" .paka)

if test "$1" == ""
then
    echo "please give this script a .paka file as an argument"
    exit
fi

if test ! "$1"
then
    echo "could not find input file: $1"
fi

if test "$SHACMD" == ""
then
    SHACMD=$(which shasum)
fi
if test "$SHACMD" == ""
then
    SHACMD=$(which sha1sum)
fi
if test "$SHACMD" == ""
then
    echo "please install shasum or sha1sum command"
    exit
fi

PCACHE=~/.paka-cache
mkdir -p "$PCACHE"

REPO="$PCACHE"/repo
mkdir -p "$REPO"

LOG="$PCACHE"/log
mkdir -p "$LOG"

if test ! -d "$REPO"/paka
then
    git clone https://github.com/fastvm/paka --depth 1 "$REPO"/paka > "$LOG"/paka
    cp "$REPO"/paka/bins/boot.bc "$PCACHE"/boot.bc
fi

if test ! -d "$REPO"/minivm
then
    git clone https://github.com/fastvm/minivm --depth 1 "$REPO"/minivm > "$LOG"/paka
    make -C "$REPO"/minivm HOST=D DC="ldc2" > "$LOG"/minivm
    cp "$REPO"/minivm/minivm "$PCACHE"/minivm
fi

if test ! -f "$PCACHE"/pakac
then
    ldc2 -O1 -i -I"$REPO"/minivm "$REPO"/minivm/vm/tod.d -of"$PCACHE"/pakac > "$LOG"/pakac
fi

RTCACHE="$PCACHE"/runs/"$("$SHACMD" "$1" | cut -d ' ' -f1)"
mkdir -p "$RTCACHE"

if test ! -f "$RTCACHE"/boot.bc
then
    if test -f "$LOG"/paka
    then
        rm -f "$LOG"/paka
    fi
    "$PCACHE"/minivm "$PCACHE"/boot.bc "$INDIR"/"$1" -o "$RTCACHE"/boot.bc | tee "$LOG"/paka
fi

if test ! -f "$RTCACHE"/out.d
then
    "$PCACHE"/pakac "$RTCACHE"/boot.bc > "$RTCACHE"/out.d
fi

if test ! -f "$RTCACHE"/out
then
    ldc2 -betterC -O3 -release $DFLAGS "$RTCACHE"/out.d -c -of"$RTCACHE"/out.o > "$LOG"/exec
    clang -flto=full "$RTCACHE"/out.o -o "$RTCACHE"/out
fi

shift
if test "$1" == "--"
then
    shift
    "$RTCACHE"/out $*
else
    cp "$RTCACHE"/out "$OUTFILE"
fi