add zig reduce subcommand

Also adds `-Donly-reduce` flag in build.zig which disables LLVM and
irrelevant code for faster iteration cycles.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/main.zig b/src/main.zig
index cbc7283eef..d52fcebeae 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -212,6 +212,14 @@ pub fn main() anyerror!void {
         }
     }
 
+    if (build_options.only_reduce) {
+        if (mem.eql(u8, args[1], "reduce")) {
+            return @import("reduce.zig").main(gpa, arena, args);
+        } else {
+            @panic("only reduce is supported in a -Donly-reduce build");
+        }
+    }
+
     return mainArgs(gpa, arena, args);
 }