3 files changed, 29 insertions, 0 deletions
diff --git a/src/libutil/meson.build b/src/libutil/meson.build
index 11bf97ee7..069798a6f 100644
--- a/src/libutil/meson.build
+++ b/src/libutil/meson.build
@@ -22,6 +22,7 @@ libutil_sources = files(
   'position.cc',
   'print-elided.cc',
   'references.cc',
+  'regex.cc',
   'serialise.cc',
   'shlex.cc',
   'signals.cc',
@@ -77,6 +78,7 @@ libutil_headers = files(
   'ref.hh',
   'references.hh',
   'regex-combinators.hh',
+  'regex.hh',
   'repair-flag.hh',
   'serialise.hh',
   'shlex.hh',
diff --git a/src/libutil/regex.cc b/src/libutil/regex.cc
new file mode 100644
index 000000000..a9e6c6bee
--- /dev/null
+++ b/src/libutil/regex.cc
@@ -0,0 +1,16 @@
+#include <string>
+#include <regex>
+
+namespace nix::regex {
+std::string quoteRegexChars(const std::string & raw)
+{
+    static auto specialRegex = std::regex(R"([.^$\\*+?()\[\]{}|])");
+    return std::regex_replace(raw, specialRegex, R"(\$&)");
+}
+
+std::regex storePathRegex(const std::string & storeDir)
+{
+    return std::regex(quoteRegexChars(storeDir) + R"(/[0-9a-z]+[0-9a-zA-Z\+\-\._\?=]*)");
+}
+
+}
diff --git a/src/libutil/regex.hh b/src/libutil/regex.hh
new file mode 100644
index 000000000..744a7d54a
--- /dev/null
+++ b/src/libutil/regex.hh
@@ -0,0 +1,11 @@
+#pragma once
+///@file
+
+#include <string>
+#include <regex>
+
+namespace nix::regex {
+std::string quoteRegexChars(const std::string & raw);
+
+std::regex storePathRegex(const std::string & storeDir);
+}