libutil: return a program handle from runProgram2

this will let us also return a source for the program output later,
which will in turn make sinkToSource unnecessary for program output
processing. this may also reopen a path for provigin program input,
but that still needs a proper async io framework to avoid problems.

Change-Id: Iaf93f47db99c38cfaf134bd60ed6a804d7ddf688

1 files changed, 2 insertions, 2 deletions

diff --git a/src/libcmd/repl.cc b/src/libcmd/repl.cc
index 39e89d999..bb9225ce5 100644
--- a/src/libcmd/repl.cc
+++ b/src/libcmd/repl.cc
@@ -251,7 +251,7 @@ void runNix(Path program, const Strings & args)
         .program = settings.nixBinDir+ "/" + program,
         .args = args,
         .environment = subprocessEnv,
-    });
+    }).wait();
 
     return;
 }
@@ -650,7 +650,7 @@ ProcessLineResult NixRepl::processLine(std::string line)
 
         // runProgram redirects stdout to a StringSink,
         // using runProgram2 to allow editors to display their UI
-        runProgram2(RunOptions { .program = editor, .searchPath = true, .args = args });
+        runProgram2(RunOptions { .program = editor, .searchPath = true, .args = args }).wait();
 
         // Reload right after exiting the editor
         state->resetFileCache();