zig_inst

#!/bin/bash


VERINDEX_URL="https://ziglang.org/download/index.json"
VERINDEX=/tmp/zig-download-index.json

fetch_index() {
    FLAGFILE=/tmp/index-refetch.$$
    touch -d '1 day ago' $FLAGFILE
    if [ -f "$VERINDEX" ]; then
        if [ $VERINDEX -nt $FLAGFILE ]; then
            rm -f $FLAGFILE
            return
        fi
    fi
    rm -f $VERINDEX
    wget -q -O $VERINDEX $VERINDEX_URL
    rm -f $FLAGFILE
}

FORCE=/bin/false
QUIET=/bin/false

if [ "$1" = "-q" ]; then
    QUIET=/bin/true
    shift
fi
if [ "$1" = "-f" ]; then
    FORCE=/bin/true
    shift
fi

VER=$1
shift

if [ "$VER" = "latest" ]; then
    VER="master"
fi
#if [ "$VER" = "master" ]; then
#    FORCE=/bin/true
#fi

if [ -z "$VER" ]; then
    echo "This script installs zig into ~/.local/share/zig/<version>"
    echo "(if its not there already)"
    echo ""
    echo "USAGE: $0 [-f] VERSION [ARCH]"
    echo " -f, if supplied, forces a full reinstall"
    echo " VERSION is a zig release version (eg. 0.6.0) or 'latest'"
    echo " ARCH is a supported architecture. defaults to x86_64-linux"
    echo ""
    
    fetch_index

    echo "Valid VERSIONs:"

    #jq -r 'keys|reverse|join(", ")' $VERINDEX
    jq -r 'keys|reverse|.[]' $VERINDEX | while read v; do echo "    $v"; done

    echo ""
    echo "Valid ARCHs:"

    jq -r 'map_values(keys)' $VERINDEX |grep [-] |sort -u | sed 's/[",]//g;'

    echo ""
    echo "NOTE: Not all VERSIONs support all ARCHs"
    exit 1
fi

ARCH=${1:-x86_64-linux}
shift

DESTDIR=~/.local/share/zig/$VER
fetch_index

URL=`jq -r ".[\"$VER\"][\"$ARCH\"].tarball" $VERINDEX`

if $FORCE ; then
    # force set, so nuke existing install
    rm -rf "$DESTDIR"
fi

mkdir -p "$DESTDIR"

TGZ="${DESTDIR}/ziglang-${VER}.tar.xz"

if [ ! -f $TGZ ]; then
    $QUIET || echo -n "fetching tarball.."
    wget -q "$URL" -O $TGZ
else
    $QUIET || echo -n "using existing tarball..."
fi

if [ ! -f "${DESTDIR}/zig" ]; then
    $QUIET || echo -n "unpacking tarball..."
    TMPDIR=/tmp/inst_zig.$$
    mkdir $TMPDIR
  
    tar -xJf $TGZ -C $TMPDIR
    
    cd $TMPDIR
    
    mv zig*/* "${DESTDIR}/"
    rmdir zig-*
    rm -rf $TMPDIR
else
    $QUIET || echo -n "tarball already unpacked..."
fi

$QUIET || echo "zig now in $DESTDIR"