Clean up SearchPath

- Better types

- Own header / C++ file pair

- Test factored out methods

- Pass parsed thing around more than strings

Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>

src/libcmd/common-eval-args.cc

@@ -105,7 +105,9 @@ MixEvalArgs::MixEvalArgs()
   )",
         .category = category,
         .labels = {"path"},
-        .handler = {[&](std::string s) { searchPath.push_back(s); }}
+        .handler = {[&](std::string s) {
+            searchPath.elements.emplace_back(SearchPath::Elem::parse(s));
+        }}
     });
 
     addFlag({

src/libcmd/common-eval-args.hh

@@ -3,6 +3,7 @@
 
 #include "args.hh"
 #include "common-args.hh"
+#include "search-path.hh"
 
 namespace nix {
 
@@ -19,7 +20,7 @@ struct MixEvalArgs : virtual Args, virtual MixRepair
 
     Bindings * getAutoArgs(EvalState & state);
 
-    Strings searchPath;
+    SearchPath searchPath;
 
     std::optional<std::string> evalStoreUrl;
 

src/libcmd/repl.cc

@@ -68,7 +68,7 @@ struct NixRepl
 
     const Path historyFile;
 
-    NixRepl(const Strings & searchPath, nix::ref<Store> store,ref<EvalState> state,
+    NixRepl(const SearchPath & searchPath, nix::ref<Store> store,ref<EvalState> state,
             std::function<AnnotatedValues()> getValues);
     virtual ~NixRepl();
 
@@ -104,7 +104,7 @@ std::string removeWhitespace(std::string s)
 }
 
 
-NixRepl::NixRepl(const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
+NixRepl::NixRepl(const SearchPath & searchPath, nix::ref<Store> store, ref<EvalState> state,
             std::function<NixRepl::AnnotatedValues()> getValues)
     : AbstractNixRepl(state)
     , debugTraceIndex(0)
@@ -1024,7 +1024,7 @@ std::ostream & NixRepl::printValue(std::ostream & str, Value & v, unsigned int m
 
 
 std::unique_ptr<AbstractNixRepl> AbstractNixRepl::create(
-   const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
+   const SearchPath & searchPath, nix::ref<Store> store, ref<EvalState> state,
    std::function<AnnotatedValues()> getValues)
 {
     return std::make_unique<NixRepl>(
@@ -1044,7 +1044,7 @@ void AbstractNixRepl::runSimple(
         NixRepl::AnnotatedValues values;
         return values;
     };
-    const Strings & searchPath = {};
+    SearchPath searchPath = {};
     auto repl = std::make_unique<NixRepl>(
             searchPath,
             openStore(),

src/libcmd/repl.hh

@@ -25,7 +25,7 @@ struct AbstractNixRepl
     typedef std::vector<std::pair<Value*,std::string>> AnnotatedValues;
 
     static std::unique_ptr<AbstractNixRepl> create(
-        const Strings & searchPath, nix::ref<Store> store, ref<EvalState> state,
+        const SearchPath & searchPath, nix::ref<Store> store, ref<EvalState> state,
         std::function<AnnotatedValues()> getValues);
 
     static void runSimple(