merge changes made in universal lambda (options and wasm directory)

build.zig

@@ -76,3 +76,25 @@ pub fn build(b: *std.Build) void {
     const test_step = b.step("test", "Run unit tests");
     test_step.dependOn(&run_unit_tests.step);
 }
+
+pub fn configureBuild(b: *std.Build, cs: *std.Build.Step.Compile, function_name: []const u8) !void {
+    const script = @embedFile("index.js");
+    const wasm_name = try std.fmt.allocPrint(b.allocator, "{s}.wasm", .{cs.name});
+    const deploy_cmd = CloudflareDeployStep.create(
+        b,
+        function_name,
+        .{ .path = "index.js" },
+        .{
+            .primary_file_data = script,
+            .wasm_name = .{
+                .search = "custom.wasm",
+                .replace = wasm_name,
+            },
+            .wasm_dir = b.getInstallPath(.bin, "."),
+        },
+    );
+    deploy_cmd.step.dependOn(b.getInstallStep());
+
+    const deploy_step = b.step("cloudflare", "Deploy as Cloudflare worker (must be compiled with -Dtarget=wasm32-wasi)");
+    deploy_step.dependOn(&deploy_cmd.step);
+}

src/CloudflareDeployStep.zig

@@ -7,8 +7,23 @@ pub const base_id: std.Build.Step.Id = .custom;
 step: std.Build.Step,
 primary_javascript_path: std.Build.LazyPath,
 worker_name: []const u8,
+options: Options,
 
-pub const Options = struct {};
+pub const Options = struct {
+    /// if set, the primary file will not be read (and may not exist). This data
+    /// will be used instead
+    primary_file_data: ?[]const u8 = null,
+
+    /// When set, the Javascript file will be searched/replaced with the target
+    /// file name for import
+    wasm_name: ?struct {
+        search: []const u8,
+        replace: []const u8,
+    } = null,
+
+    /// When set, the directory specified will be used rather than the current directory
+    wasm_dir: ?[]const u8 = null,
+};
 
 pub fn create(
     owner: *std.Build,
@@ -16,7 +31,6 @@ pub fn create(
     primary_javascript_path: std.Build.LazyPath,
     options: Options,
 ) *CloudflareDeployStep {
-    _ = options;
     const self = owner.allocator.create(CloudflareDeployStep) catch @panic("OOM");
     self.* = CloudflareDeployStep{
         .step = std.Build.Step.init(.{
@@ -27,7 +41,9 @@ pub fn create(
         }),
         .primary_javascript_path = primary_javascript_path,
         .worker_name = worker_name,
+        .options = options,
     };
+    if (options.primary_file_data == null)
         primary_javascript_path.addStepDependencies(&self.step);
     return self;
 }
@@ -38,9 +54,19 @@ fn make(step: *std.Build.Step, prog_node: *std.Progress.Node) !void {
     const self = @as(*CloudflareDeployStep, @fieldParentPtr("step", step));
 
     var client = std.http.Client{ .allocator = b.allocator };
+    try client.initDefaultProxies(b.allocator);
     defer client.deinit();
 
-    const script = try std.fs.cwd().readFileAlloc(b.allocator, self.primary_javascript_path.path, std.math.maxInt(usize));
+    const script = self.options.primary_file_data orelse
+        try std.fs.cwd().readFileAlloc(b.allocator, self.primary_javascript_path.path, std.math.maxInt(usize));
+    defer if (self.options.primary_file_data == null) b.allocator.free(script);
+
+    var final_script = script;
+    if (self.options.wasm_name) |n| {
+        final_script = try std.mem.replaceOwned(u8, b.allocator, script, n.search, n.replace);
+        if (self.options.primary_file_data == null) b.allocator.free(script);
+    }
+    defer if (self.options.wasm_name) |_| b.allocator.free(final_script);
 
     var al = std.ArrayList(u8).init(b.allocator);
     defer al.deinit();
@@ -48,6 +74,7 @@ fn make(step: *std.Build.Step, prog_node: *std.Progress.Node) !void {
         b.allocator,
         &client,
         self.worker_name,
+        self.options.wasm_dir orelse ".",
         script,
         al.writer(),
         std.io.getStdErr().writer(),

src/main.zig

@@ -75,11 +75,12 @@ pub fn pushWorker(
     allocator: std.mem.Allocator,
     client: *std.http.Client,
     worker_name: []const u8,
+    wasm_dir: []const u8,
     script: []const u8,
     writer: anytype,
     err_writer: anytype,
 ) !void {
-    var wasm = try loadWasm(allocator, script);
+    var wasm = try loadWasm(allocator, script, wasm_dir);
     defer wasm.deinit();
 
     var accountid = std.posix.getenv("CLOUDFLARE_ACCOUNT_ID");
@@ -118,7 +119,7 @@ pub fn pushWorker(
         try enableWorker(allocator, client, accountid.?, worker_name);
 }
 
-fn loadWasm(allocator: std.mem.Allocator, script: []const u8) !Wasm {
+fn loadWasm(allocator: std.mem.Allocator, script: []const u8, wasm_dir: []const u8) !Wasm {
     // Looking for a string like this: import demoWasm from "demo.wasm"
     // JavaScript may or may not have ; characters. We're not doing
     // a full JS parsing here, so this may not be the most robust
@@ -159,7 +160,9 @@ fn loadWasm(allocator: std.mem.Allocator, script: []const u8) !Wasm {
 
     const nm = try allocator.dupe(u8, name.?);
     errdefer allocator.free(nm);
-    const data = try std.fs.cwd().readFileAlloc(allocator, nm, std.math.maxInt(usize));
+    const path = try std.fs.path.join(allocator, &[_][]const u8{ wasm_dir, nm });
+    defer allocator.free(path);
+    const data = try std.fs.cwd().readFileAlloc(allocator, path, std.math.maxInt(usize));
     return Wasm{
         .allocator = allocator,
         .name = nm,