[PATCH] Print RUNTIME_PREFIX warning only when GIT_TRACE is set

[Johannes Sixt <j.sixt@viscovery.net>]

From: Johannes Sixt <j6t@kdbg.org>

When RUNTIME_PREFIX is enabled, the installation prefix is derived by
trying a limited set of known locations where the git executable can
reside. If none of these is found, a warning is emitted.

When git is built in a directory that matches neither of these known names,
the warning would always be emitted when the uninstalled executable is run.
This is a problem on Windows, where gitk picks the uninstalled git when
invoked from the build directory and gets confused by the warning.

Print the warning only when GIT_TRACE is set.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
---
Johannes Schindelin schrieb:
> P.S.: I cannot recall defending the warning, but I might have thought it a 
> good idea at some stage. This is no longer so.

I do recall you defended it; good to know that you changed your mind.

Thanks,
-- Hannes

 exec_cmd.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/exec_cmd.c b/exec_cmd.c
index 408e4e5..b2c07c7 100644
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -28,7 +28,7 @@ const char *system_path(const char *path)
 	    !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
 	    !(prefix = strip_path_suffix(argv0_path, "git"))) {
 		prefix = PREFIX;
-		fprintf(stderr, "RUNTIME_PREFIX requested, "
+		trace_printf("RUNTIME_PREFIX requested, "
 				"but prefix computation failed.  "
 				"Using static fallback '%s'.\n", prefix);
 	}
-- 
1.7.0.83.g241b9.dirty