From f05e1f6fbb8a760f23a7af16b065078df6588acf Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Thu, 21 Apr 2022 11:58:40 +0200
Subject: [PATCH] Move hiliteMatches into a separate header

This is mostly so that we don't #include <regex> everywhere (which
adds quite a bit of compilation time).
---
 src/libutil/fmt.hh                | 12 ------------
 src/libutil/{fmt.cc => hilite.cc} |  4 +---
 src/libutil/hilite.hh             | 20 ++++++++++++++++++++
 src/nix/search.cc                 |  2 +-
 4 files changed, 22 insertions(+), 16 deletions(-)
 rename src/libutil/{fmt.cc => hilite.cc} (96%)
 create mode 100644 src/libutil/hilite.hh

diff --git a/src/libutil/fmt.hh b/src/libutil/fmt.hh
index 0821b3b74..7664e5c04 100644
--- a/src/libutil/fmt.hh
+++ b/src/libutil/fmt.hh
@@ -2,7 +2,6 @@
 
 #include <boost/format.hpp>
 #include <string>
-#include <regex>
 #include "ansicolor.hh"
 
 
@@ -155,15 +154,4 @@ inline hintformat hintfmt(std::string plain_string)
     return hintfmt("%s", normaltxt(plain_string));
 }
 
-/* Highlight all the given matches in the given string `s` by wrapping
-   them between `prefix` and `postfix`.
-
-   If some matches overlap, then their union will be wrapped rather
-   than the individual matches. */
-std::string hiliteMatches(
-    std::string_view s,
-    std::vector<std::smatch> matches,
-    std::string_view prefix,
-    std::string_view postfix);
-
 }
diff --git a/src/libutil/fmt.cc b/src/libutil/hilite.cc
similarity index 96%
rename from src/libutil/fmt.cc
rename to src/libutil/hilite.cc
index 3dd93d73e..a5991ca39 100644
--- a/src/libutil/fmt.cc
+++ b/src/libutil/hilite.cc
@@ -1,6 +1,4 @@
-#include "fmt.hh"
-
-#include <regex>
+#include "hilite.hh"
 
 namespace nix {
 
diff --git a/src/libutil/hilite.hh b/src/libutil/hilite.hh
new file mode 100644
index 000000000..f8bdbfc55
--- /dev/null
+++ b/src/libutil/hilite.hh
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <regex>
+#include <vector>
+#include <string>
+
+namespace nix {
+
+/* Highlight all the given matches in the given string `s` by wrapping
+   them between `prefix` and `postfix`.
+
+   If some matches overlap, then their union will be wrapped rather
+   than the individual matches. */
+std::string hiliteMatches(
+    std::string_view s,
+    std::vector<std::smatch> matches,
+    std::string_view prefix,
+    std::string_view postfix);
+
+}
diff --git a/src/nix/search.cc b/src/nix/search.cc
index e96a85ea2..e284de95c 100644
--- a/src/nix/search.cc
+++ b/src/nix/search.cc
@@ -9,7 +9,7 @@
 #include "shared.hh"
 #include "eval-cache.hh"
 #include "attr-path.hh"
-#include "fmt.hh"
+#include "hilite.hh"
 
 #include <regex>
 #include <fstream>