Get stripped down libnixstore and libnixfetchers building on Windows

And their unit tests!

Co-Authored-By volth <volth@volth.com>

Makefile

@@ -7,14 +7,14 @@ ifeq ($(ENABLE_BUILD), yes)
 makefiles = \
   mk/precompiled-headers.mk \
   local.mk \
-  src/libutil/local.mk
+  src/libutil/local.mk \
+  src/libstore/local.mk \
+  src/libfetchers/local.mk \
+  src/libexpr/local.mk
 
 ifdef HOST_UNIX
 makefiles += \
-  src/libstore/local.mk \
-  src/libfetchers/local.mk \
   src/libmain/local.mk \
-  src/libexpr/local.mk \
   src/libcmd/local.mk \
   src/nix/local.mk \
   src/resolve-system-dependencies/local.mk \
@@ -33,13 +33,10 @@ endif
 ifeq ($(ENABLE_BUILD)_$(ENABLE_TESTS), yes_yes)
 UNIT_TEST_ENV = _NIX_TEST_UNIT_DATA=unit-test-data
 makefiles += \
-  src/libutil/tests/local.mk
-ifdef HOST_UNIX
-makefiles += \
+  src/libutil/tests/local.mk \
   src/libstore/tests/local.mk \
   src/libexpr/tests/local.mk
 endif
-endif
 
 ifeq ($(ENABLE_TESTS), yes)
 ifdef HOST_UNIX

src/libexpr/eval-settings.cc

@@ -1,6 +1,8 @@
 #include "users.hh"
 #include "globals.hh"
-#include "profiles.hh"
+#ifndef _WIN32
+# include "profiles.hh"
+#endif
 #include "eval.hh"
 #include "eval-settings.hh"
 
@@ -65,8 +67,10 @@ Strings EvalSettings::getDefaultNixPath()
 
     if (!evalSettings.restrictEval && !evalSettings.pureEval) {
         add(getNixDefExpr() + "/channels");
+        #ifndef _WIN32
         add(rootChannelsDir() + "/nixpkgs", "nixpkgs");
         add(rootChannelsDir());
+        #endif
     }
 
     return res;

src/libexpr/eval.cc

@@ -10,27 +10,32 @@
 #include "eval-inline.hh"
 #include "filetransfer.hh"
 #include "function-trace.hh"
-#include "profiles.hh"
 #include "print.hh"
 #include "fs-input-accessor.hh"
 #include "memory-input-accessor.hh"
 #include "signals.hh"
 
+#ifndef _WIN32
+# include "profiles.hh"
+#endif
+
 #include <algorithm>
 #include <chrono>
 #include <iostream>
 #include <cstring>
 #include <optional>
 #include <unistd.h>
 #include <sys/time.h>
-#include <sys/resource.h>
 #include <iostream>
 #include <fstream>
 #include <functional>
 
-#include <sys/resource.h>
 #include <nlohmann/json.hpp>
 
+#ifndef _WIN32
+# include <sys/resource.h>
+#endif
+
 #if HAVE_BOEHMGC
 
 #define GC_INCLUDE_NEW
@@ -462,6 +467,8 @@ ErrorBuilder & ErrorBuilder::withFrame(const Env & env, const Expr & expr)
     return *this;
 }
 
+// Don't want Windows function
+#undef SearchPath
 
 EvalState::EvalState(
     const SearchPath & _searchPath,
@@ -2543,9 +2550,11 @@ void EvalState::maybePrintStats()
 
 void EvalState::printStatistics()
 {
+#ifndef _WIN32
     struct rusage buf;
     getrusage(RUSAGE_SELF, &buf);
     float cpuTime = buf.ru_utime.tv_sec + ((float) buf.ru_utime.tv_usec / 1000000);
+#endif
 
     uint64_t bEnvs = nrEnvs * sizeof(Env) + nrValuesInEnvs * sizeof(Value *);
     uint64_t bLists = nrListElems * sizeof(Value *);
@@ -2562,7 +2571,9 @@ void EvalState::printStatistics()
     if (outPath != "-")
         fs.open(outPath, std::fstream::out);
     json topObj = json::object();
+#ifndef _WIN32
     topObj["cpuTime"] = cpuTime;
+#endif
     topObj["envs"] = {
         {"number", nrEnvs},
         {"elements", nrValuesInEnvs},

src/libexpr/lexer.l

@@ -132,7 +132,7 @@ else        { return ELSE; }
 assert      { return ASSERT; }
 with        { return WITH; }
 let         { return LET; }
-in          { return IN; }
+in          { return INX; }
 rec         { return REC; }
 inherit     { return INHERIT; }
 or          { return OR_KW; }
@@ -158,7 +158,7 @@ or          { return OR_KW; }
                       .errPos = data->state.positions[CUR_POS],
                   });
               }
-              return INT;
+              return INTX;
             }
 {FLOAT}     { errno = 0;
               yylval->nf = strtod(yytext, 0);
@@ -167,7 +167,7 @@ or          { return OR_KW; }
                       .msg = hintfmt("invalid float '%1%'", yytext),
                       .errPos = data->state.positions[CUR_POS],
                   });
-              return FLOAT;
+              return FLOATX;
             }
 
 \$\{        { PUSH_STATE(DEFAULT); return DOLLAR_CURLY; }

src/libexpr/local.mk

@@ -11,12 +11,18 @@ libexpr_SOURCES := \
   $(wildcard $(d)/flake/*.cc) \
   $(d)/lexer-tab.cc \
   $(d)/parser-tab.cc
+ifdef HOST_UNIX
+    libexpr_SOURCES += $(wildcard $(d)/unix/*.cc)
+endif
 
 libexpr_CXXFLAGS += $(INCLUDE_libutil) $(INCLUDE_libstore) -I src/libfetchers -I src/libmain -I src/libexpr
 
 libexpr_LIBS = libutil libstore libfetchers
 
-libexpr_LDFLAGS += -lboost_context -pthread
+libexpr_LDFLAGS += -lboost_context
+ifdef HOST_UNIX
+ libexpr_LDFLAGS += -pthread
+endif
 ifdef HOST_LINUX
  libexpr_LDFLAGS += -ldl
 endif

src/libexpr/parser.y

@@ -340,11 +340,11 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
 %type <id> attr
 %token <id> ID
 %token <str> STR IND_STR
-%token <n> INT
-%token <nf> FLOAT
+%token <n> INTX
+%token <nf> FLOATX
 %token <path> PATH HPATH SPATH PATH_END
 %token <uri> URI
-%token IF THEN ELSE ASSERT WITH LET IN REC INHERIT EQ NEQ AND OR IMPL OR_KW
+%token IF THEN ELSE ASSERT WITH LET INX REC INHERIT EQ NEQ AND OR IMPL OR_KW
 %token DOLLAR_CURLY /* == ${ */
 %token IND_STRING_OPEN IND_STRING_CLOSE
 %token ELLIPSIS
@@ -387,7 +387,7 @@ expr_function
     { $$ = new ExprAssert(CUR_POS, $2, $4); }
   | WITH expr ';' expr_function
     { $$ = new ExprWith(CUR_POS, $2, $4); }
-  | LET binds IN expr_function
+  | LET binds INX expr_function
     { if (!$2->dynamicAttrs.empty())
         throw ParseError({
             .msg = hintfmt("dynamic attributes not allowed in let"),
@@ -457,8 +457,8 @@ expr_simple
       else
           $$ = new ExprVar(CUR_POS, data->symbols.create($1));
   }
-  | INT { $$ = new ExprInt($1); }
-  | FLOAT { $$ = new ExprFloat($1); }
+  | INTX { $$ = new ExprInt($1); }
+  | FLOATX { $$ = new ExprFloat($1); }
   | '"' string_parts '"' { $$ = $2; }
   | IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE {
       $$ = stripIndentation(CUR_POS, data->symbols, std::move(*$2));

src/libexpr/primops.cc

@@ -25,7 +25,10 @@
 #include <algorithm>
 #include <cstring>
 #include <regex>
-#include <dlfcn.h>
+
+#ifndef _WIN32
+# include <dlfcn.h>
+#endif
 
 #include <cmath>
 
@@ -327,6 +330,8 @@ static RegisterPrimOp primop_import({
     }
 });
 
+#ifndef _WIN32
+
 /* Want reasonable symbol names, so extern C */
 /* !!! Should we pass the Pos or the file name too? */
 extern "C" typedef void (*ValueInitializer)(EvalState & state, Value & v);
@@ -399,6 +404,8 @@ void prim_exec(EvalState & state, const PosIdx pos, Value * * args, Value & v)
     }
 }
 
+#endif
+
 /* Return a string representing the type of the expression. */
 static void prim_typeOf(EvalState & state, const PosIdx pos, Value * * args, Value & v)
 {
@@ -2223,7 +2230,9 @@ static void addPath(
             arg2.mkString(
                 S_ISREG(st.st_mode) ? "regular" :
                 S_ISDIR(st.st_mode) ? "directory" :
+            #ifndef _WIN32
                 S_ISLNK(st.st_mode) ? "symlink" :
+            #endif
                 "unknown" /* not supported, will fail! */);
 
             Value * args []{&arg1, &arg2};
@@ -4458,6 +4467,7 @@ void EvalState::createBaseEnv()
         )",
     });
 
+#ifndef _WIN32
     // Miscellaneous
     if (evalSettings.enableNativeCode) {
         addPrimOp({
@@ -4471,6 +4481,7 @@ void EvalState::createBaseEnv()
             .fun = prim_exec,
         });
     }
+#endif
 
     addPrimOp({
         .name = "__traceVerbose",

src/libexpr/search-path.hh

@@ -8,6 +8,9 @@
 
 namespace nix {
 
+// Do not want the windows macro (alias to `SearchPathA`)
+#undef SearchPath
+
 /**
  * A "search path" is a list of ways look for something, used with
  * `builtins.findFile` and `< >` lookup expressions.

src/libexpr/tests/primops.cc

@@ -87,11 +87,13 @@ namespace nix {
         ASSERT_THAT(*p->value, IsIntEq(123));
     }
 
+    #ifndef _WIN32
     TEST_F(PrimOpTest, getEnv) {
         setenv("_NIX_UNIT_TEST_ENV_VALUE", "test value", 1);
         auto v = eval("builtins.getEnv \"_NIX_UNIT_TEST_ENV_VALUE\"");
         ASSERT_THAT(v, IsStringEq("test value"));
     }
+    #endif
 
     TEST_F(PrimOpTest, seq) {
         ASSERT_THROW(eval("let x = throw \"test\"; in builtins.seq x { }"), ThrownError);

src/libfetchers/local.mk

@@ -8,6 +8,8 @@ libfetchers_SOURCES := $(wildcard $(d)/*.cc)
 
 libfetchers_CXXFLAGS += $(INCLUDE_libutil) $(INCLUDE_libstore)
 
-libfetchers_LDFLAGS += -pthread
+ifdef HOST_UNIX
+    libfetchers_LDFLAGS += -pthread
+endif
 
 libfetchers_LIBS = libutil libstore