Don't touch rust files generated by build scripts

This confuses rustc-fake, which expects to only be run when profiled (on
the code being timed, not on dependencies).

Author: jyn514

collector/src/execute.rs

@@ -53,8 +53,10 @@ fn touch(root: &Path, path: &Path) -> anyhow::Result<()> {
 
 fn touch_all(path: &Path) -> anyhow::Result<()> {
     let mut cmd = Command::new("bash");
+    // Don't touch files in `target/`, since they're likely generated by build scripts and might be from a dependency.
+    // Don't touch build scripts, which confuses the wrapped rustc.
     cmd.current_dir(path)
-        .args(&["-c", "find . -name '*.rs' | xargs touch"]);
+        .args(&["-c", "find . -path ./target -prune -false -o -name '*.rs' | grep -v '^./build.rs$' | xargs touch"]);
     command_output(&mut cmd).with_context(|| format!("touching all .rs in {:?}", path))?;
     // We also delete the cmake caches to avoid errors when moving directories around.
     // This might be a bit slower but at least things build