flow/zig

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#!/bin/bash
set -e
ARCH=$(uname -m)
BASEDIR="$(cd "$(dirname "$0")" && pwd)"
ZIGDIR=$BASEDIR/.cache/zig
VERSION=$(< build.zig.version)
OS=$(uname)
if [ "$OS" == "Linux" ] ; then
OS=linux
elif [ "$OS" == "Darwin" ] ; then
OS=macos
elif [ "$OS" == "FreeBSD" ] ; then
OS=freebsd
if [ "$ARCH" == "amd64" ] ; then
ARCH=x86_64
fi
fi
if [ "$ARCH" == "arm64" ] ; then
ARCH=aarch64
fi
ZIGVER="zig-$OS-$ARCH-$VERSION"
ZIG=$ZIGDIR/$ZIGVER/zig
if [ "$1" == "update" ] ; then
curl -L --silent https://ziglang.org/download/index.json | jq -r '.master | .version' > build.zig.version
NEWVERSION=$(< build.zig.version)
if [ "$VERSION" != "$NEWVERSION" ] ; then
echo zig version updated from $VERSION to $NEWVERSION
echo rebuilding to update cdb...
$0 cdb
exit 0
fi
echo zig version $VERSION is up-to-date
exit 0
fi
get_zig() {
(
mkdir -p "$ZIGDIR"
cd "$ZIGDIR"
TARBALL="https://ziglang.org/builds/$ZIGVER.tar.xz"
if [ "$OS" == "freebsd" ] ; then
TARBALL="https://ziglang.org/download/$VERSION/$ZIGVER.tar.xz"
fi
if [ ! -d "$ZIGVER" ] ; then
curl "$TARBALL" | tar -xJ
fi
)
}
get_zig
if [ "$1" == "cdb" ] ; then
rm -rf zig-cache
rm -rf .cache/cdb
$ZIG build
(echo \[ ; cat .cache/cdb/* ; echo {}\]) | perl -0777 -pe 's/,\n\{\}//igs' | jq . | grep -v 'no-default-config' > compile_commands.json
exit 0
fi
exec $ZIG "$@"