1 files changed, 59 insertions, 0 deletions
diff --git a/XCFrameworkStep.zig b/XCFrameworkStep.zig
new file mode 100644
index 0000000..36fdbeb
--- /dev/null
+++ b/XCFrameworkStep.zig
@@ -0,0 +1,59 @@
+//! A zig builder step that runs "swift build" in the context of
+//! a Swift project managed with SwiftPM. This is primarily meant to build
+//! executables currently since that is what we build.
+const XCFrameworkStep = @This();
+
+const std = @import("std");
+const Step = std.build.Step;
+const RunStep = std.build.RunStep;
+const FileSource = std.build.FileSource;
+
+pub const Options = struct {
+    /// The name of the xcframework to create.
+    name: []const u8,
+
+    /// The path to write the framework
+    out_path: []const u8,
+
+    /// Library file (dylib, a) to package.
+    library: std.build.FileSource,
+
+    /// Path to a directory with the headers.
+    headers: std.build.FileSource,
+};
+
+step: *Step,
+
+pub fn create(b: *std.Build, opts: Options) *XCFrameworkStep {
+    const self = b.allocator.create(XCFrameworkStep) catch @panic("OOM");
+
+    // We have to delete the old xcframework first since we're writing
+    // to a static path.
+    const run_delete = run: {
+        const run = RunStep.create(b, b.fmt("xcframework delete {s}", .{opts.name}));
+        run.has_side_effects = true;
+        run.addArgs(&.{ "rm", "-rf", opts.out_path });
+        break :run run;
+    };
+
+    // Then we run xcodebuild to create the framework.
+    const run_create = run: {
+        const run = RunStep.create(b, b.fmt("xcframework {s}", .{opts.name}));
+        run.has_side_effects = true;
+        run.addArgs(&.{ "xcodebuild", "-create-xcframework" });
+        run.addArg("-library");
+        run.addFileSourceArg(opts.library);
+        run.addArg("-headers");
+        run.addFileSourceArg(opts.headers);
+        run.addArg("-output");
+        run.addArg(opts.out_path);
+        break :run run;
+    };
+    run_create.step.dependOn(&run_delete.step);
+
+    self.* = .{
+        .step = &run_create.step,
+    };
+
+    return self;
+}