prune-packed: only show progress when stderr is a tty

diff --git a/pager.c b/pager.c
index 4921843577e42b774457a61277b9bc3441d3ab6b..86facec7b417b26a7dbd9b3c1338149fcecd5588 100644 (file)
--- a/pager.c
+++ b/pager.c
@@ -9,7 +9,7 @@
 
 static int spawned_pager;
 
-#ifndef __MINGW32__
+#ifndef WIN32
 static void pager_preexec(void)
 {
        /*
@@ -21,8 +21,6 @@ static void pager_preexec(void)
        FD_ZERO(&in);
        FD_SET(0, &in);
        select(1, &in, NULL, &in, NULL);
-
-       setenv("LESS", "FRSX", 0);
 }
 #endif
 
@@ -70,7 +68,11 @@ void setup_pager(void)
        pager_argv[2] = pager;
        pager_process.argv = pager_argv;
        pager_process.in = -1;
-#ifndef __MINGW32__
+       if (!getenv("LESS")) {
+               static const char *env[] = { "LESS=FRSX", NULL };
+               pager_process.env = env;
+       }
+#ifndef WIN32
        pager_process.preexec_cb = pager_preexec;
 #endif
        if (start_command(&pager_process))