engine.pl: delete the captured stderr file if empty

Keep the build clean of extraneous files if it is indeed clean.
Otherwise leave the msvc-build-makedryerrors.txt file both as
a flag for any CI system or for manual debugging.

Note that the file will contain the new values of the GIT_VERSION
and GITGUI_VERSION if they were generated by the make file. They
are omitted if the release is tagged and indentically defined in
their respective GIT_VERSION_GEN file DEF_VER variables.

Signed-off-by: Philip Oakley <[email protected]>

Author: Philip Oakley

contrib/buildsystems/engine.pl

@@ -75,6 +75,9 @@ sub showUsage
 # Pipe a make --dry-run into a variable, if not already loaded from file
 # Capture the make dry stderr to file for review (will be empty for a release build).
 @makedry = `cd $git_dir && make -n MSVC=1 NO_PERL=1 V=1 2>msvc-build-makedryerrors.txt` if !@makedry;
+# test for an empty msvc-build-makedryerrors.txt file and remove it
+#system("if test ! -s msvc-build-makedryerrors.txt; then rm msvc-build-makedryerrors.txt fi;");
+unlink if -f and !-s "msvc-build-makedryerrors.txt";
 
 # Parse the make output into usable info
 parseMakeOutput();