From cc144a302f36d39b88b6d1bd5f1de13987e46cb0 Mon Sep 17 00:00:00 2001
From: Jacob Lifshay <programmerjake@gmail.com>
Date: Thu, 2 Sep 2021 16:00:58 -0700
Subject: [PATCH] change proc-macro debugging code to be feature gated

---
 .gitignore                                    |  1 +
 .../Cargo.toml                                |  3 +++
 .../src/lib.rs                                | 19 ++++++++++++-------
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/.gitignore b/.gitignore
index c7acde7..54c4c80 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 __pycache__
 *.pyc
 /output-for-*
+/proc-macro-out.rs
diff --git a/power-instruction-analyzer-proc-macro/Cargo.toml b/power-instruction-analyzer-proc-macro/Cargo.toml
index 6b1b193..c2cc3a0 100644
--- a/power-instruction-analyzer-proc-macro/Cargo.toml
+++ b/power-instruction-analyzer-proc-macro/Cargo.toml
@@ -15,3 +15,6 @@ proc-macro = true
 quote = "1.0"
 proc-macro2 = "1.0"
 syn = { version = "1.0", features = ["full", "parsing", "extra-traits"] }
+
+[features]
+debug-proc-macro = []
diff --git a/power-instruction-analyzer-proc-macro/src/lib.rs b/power-instruction-analyzer-proc-macro/src/lib.rs
index 923363b..cd6d342 100644
--- a/power-instruction-analyzer-proc-macro/src/lib.rs
+++ b/power-instruction-analyzer-proc-macro/src/lib.rs
@@ -16,13 +16,18 @@ pub fn instructions(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as Instructions);
     match input.to_tokens() {
         Ok(retval) => {
-            fs::write(
-                Path::new(&env::var_os("CARGO_MANIFEST_DIR").unwrap()).join("out.rs"),
-                retval.to_string(),
-            )
-            .unwrap();
-            quote! {
-                include!(concat!(env!("CARGO_MANIFEST_DIR"), "/out.rs"));
+            if cfg!(feature = "debug-proc-macro") {
+                fs::write(
+                    Path::new(&env::var_os("CARGO_MANIFEST_DIR").unwrap())
+                        .join("proc-macro-out.rs"),
+                    retval.to_string(),
+                )
+                .unwrap();
+                quote! {
+                    include!(concat!(env!("CARGO_MANIFEST_DIR"), "/proc-macro-out.rs"));
+                }
+            } else {
+                retval
             }
         }
         Err(err) => err.to_compile_error(),
-- 
2.30.2