1 files changed, 40 insertions, 0 deletions
diff --git a/lib/std/Build/InstallFileStep.zig b/lib/std/Build/InstallFileStep.zig
new file mode 100644
index 0000000000..8c8d8ad2d4
--- /dev/null
+++ b/lib/std/Build/InstallFileStep.zig
@@ -0,0 +1,40 @@
+const std = @import("../std.zig");
+const Step = std.Build.Step;
+const FileSource = std.Build.FileSource;
+const InstallDir = std.Build.InstallDir;
+const InstallFileStep = @This();
+
+pub const base_id = .install_file;
+
+step: Step,
+builder: *std.Build,
+source: FileSource,
+dir: InstallDir,
+dest_rel_path: []const u8,
+/// This is used by the build system when a file being installed comes from one
+/// package but is being installed by another.
+override_source_builder: ?*std.Build = null,
+
+pub fn init(
+    builder: *std.Build,
+    source: FileSource,
+    dir: InstallDir,
+    dest_rel_path: []const u8,
+) InstallFileStep {
+    builder.pushInstalledFile(dir, dest_rel_path);
+    return InstallFileStep{
+        .builder = builder,
+        .step = Step.init(.install_file, builder.fmt("install {s} to {s}", .{ source.getDisplayName(), dest_rel_path }), builder.allocator, make),
+        .source = source.dupe(builder),
+        .dir = dir.dupe(builder),
+        .dest_rel_path = builder.dupePath(dest_rel_path),
+    };
+}
+
+fn make(step: *Step) !void {
+    const self = @fieldParentPtr(InstallFileStep, "step", step);
+    const src_builder = self.override_source_builder orelse self.builder;
+    const full_src_path = self.source.getPath(src_builder);
+    const full_dest_path = self.builder.getInstallPath(self.dir, self.dest_rel_path);
+    try self.builder.updateFile(full_src_path, full_dest_path);
+}