Merge pull request #104 from Browsercore/zig-version

Use fixed zig version

Makefile

@@ -23,7 +23,36 @@ help:
 
 # $(ZIG) commands
 # ------------
-.PHONY: build build-release run run-release shell test bench
+.PHONY: build build-release run run-release shell test bench download-zig
+
+zig_version = $(shell grep 'recommended_zig_version = "' "vendor/jsruntime-lib/build.zig" | cut -d'"' -f2)
+kernel = $(shell uname -ms)
+
+## Download the zig recommended version
+download-zig:
+ifeq ($(kernel), Darwin x86_64)
+	$(eval target="macos")
+	$(eval arch="x86_64")
+else ifeq ($(kernel), Darwin arm64)
+	$(eval target="macos")
+	$(eval arch="aarch64")
+else ifeq ($(kernel), Linux aarch64)
+	$(eval target="linux")
+	$(eval arch="aarch64")
+else ifeq ($(kernel), Linux arm64)
+	$(eval target="linux")
+	$(eval arch="aarch64")
+else ifeq ($(kernel), Linux x86_64)
+	$(eval target="linux")
+	$(eval arch="x86_64")
+else
+	$(error "Unhandled kernel: $(kernel)")
+endif
+	$(eval url = "https://ziglang.org/builds/zig-$(target)-$(arch)-$(zig_version).tar.xz")
+	$(eval dest = "/tmp/zig-$(target)-$(arch)-$(zig_version).tar.xz")
+	@printf "\e[36mDownload zig version $(zig_version)...\e[0m\n"
+	@curl -o "$(dest)" -L "$(url)" || (printf "\e[33mBuild ERROR\e[0m\n"; exit 1;)
+	@printf "\e[33mDownloaded $(dest)\e[0m\n"
 
 ## Build in debug mode
 build:

build.zig

@@ -1,10 +1,29 @@
 const std = @import("std");
 
+const builtin = @import("builtin");
+
 const jsruntime_path = "vendor/jsruntime-lib/";
 const jsruntime = @import("vendor/jsruntime-lib/build.zig");
 const jsruntime_pkgs = jsruntime.packages(jsruntime_path);
 
+/// Do not rename this constant. It is scanned by some scripts to determine
+/// which zig version to install.
+const recommended_zig_version = jsruntime.recommended_zig_version;
+
 pub fn build(b: *std.build.Builder) !void {
+    switch (comptime builtin.zig_version.order(std.SemanticVersion.parse(recommended_zig_version) catch unreachable)) {
+        .eq => {},
+        .lt => {
+            @compileError("The minimum version of Zig required to compile is '" ++ recommended_zig_version ++ "', found '" ++ builtin.zig_version_string ++ "'.");
+        },
+        .gt => {
+            std.debug.print(
+                "WARNING: Recommended Zig version '{s}', but found '{s}', build may fail...\n\n",
+                .{ recommended_zig_version, builtin.zig_version_string },
+            );
+        },
+    }
+
     const target = b.standardTargetOptions(.{});
     const mode = b.standardOptimizeOption(.{});