1 files changed, 29 insertions, 0 deletions
diff --git a/tools/configure_file.bzl b/tools/configure_file.bzl
new file mode 100644
index 0000000..8fdd75c
--- /dev/null
+++ b/tools/configure_file.bzl
@@ -0,0 +1,29 @@
+load("//:project_config.bzl", "version")
+load("@rules_cc//cc:find_cc_toolchain.bzl", "find_cc_toolchain", "use_cc_toolchain")
+
+def configure_file(**kwargs):
+    _configure_file(
+        source_file = "{name}.h".format(**kwargs),
+        **kwargs
+    )
+
+def _configure_file_impl(ctx):
+    cc_toolchain = find_cc_toolchain(ctx)
+
+    ctx.actions.expand_template(
+        template = ctx.file.template,
+        output = ctx.outputs.source_file,
+        substitutions = {
+            "{VERSION}": '"{}"'.format(version()),
+            "{CC}": '"{} " __VERSION__'.format(cc_toolchain.compiler),
+        },
+    )
+
+_configure_file = rule(
+    attrs = {
+        "template": attr.label(allow_single_file = True),
+        "source_file": attr.output(mandatory = True),
+    },
+    toolchains = use_cc_toolchain(),
+    implementation = _configure_file_impl,
+)