build: update to zig-0.13 and update zig wrapper from flow

build.zig.version

@@ -1 +1 @@
-0.13.0-dev.363+7fc3fb955
+0.13.0

zig

@@ -6,7 +6,25 @@ ARCH=$(uname -m)
 BASEDIR="$(cd "$(dirname "$0")" && pwd)"
 ZIGDIR=$BASEDIR/.cache/zig
 VERSION=$(<build.zig.version)
-ZIGVER="zig-linux-$ARCH-$VERSION"
+
+OS=$(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
@@ -14,10 +32,12 @@ if [ "$1" == "update" ] ; then
     NEWVERSION=$(<build.zig.version)
 
     if [ "$VERSION" != "$NEWVERSION" ]; then
+        echo "zig version updated from $VERSION to $NEWVERSION"
+        echo "rebuilding to update cdb..."
         $0 cdb
-        exec $0
+        exit 0
     fi
-    echo zig version $VERSION is up-to-date
+    echo "zig version $VERSION is up-to-date"
     exit 0
 fi
 
@@ -26,6 +46,9 @@ 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
@@ -36,12 +59,15 @@ get_zig
 
 if [ "$1" == "cdb" ]; then
     rm -rf zig-cache
-    rm -rf zig-bin
     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
+    (
+        echo \[
+        cat .cache/cdb/*
+        echo {}\]
+    ) | perl -0777 -pe 's/,\n\{\}//igs' | jq . | grep -v 'no-default-config' >compile_commands.json
     exit 0
 fi