# HG changeset patch
# User Matt Mackall <mpm@selenic.com>
# Date 1202088545 21600
# Node ID 090b1a6659014ee5c88f8d877230b9ad7a9a48d1
# Parent  3c9dbb743d2091943950a1f564e899038ad41dac
filemerge: add config item for GUI tools

<tool>.gui indicates whether a tool requires a GUI to run

diff -r 3c9dbb743d20 -r 090b1a665901 mercurial/filemerge.py
--- a/mercurial/filemerge.py	Sun Feb 03 19:29:05 2008 -0600
+++ b/mercurial/filemerge.py	Sun Feb 03 19:29:05 2008 -0600
@@ -36,6 +36,8 @@
             ui.warn(_("tool %s can't handle symlinks\n") % tmsg)
         elif binary and not _toolbool(ui, tool, "binary"):
             ui.warn(_("tool %s can't handle binary\n") % tmsg)
+        elif not util.gui() and _toolbool(ui, tool, "gui"):
+            ui.warn(_("tool %s requires a GUI\n") % tmsg)
         else:
             return True
         return False
diff -r 3c9dbb743d20 -r 090b1a665901 mercurial/util.py
--- a/mercurial/util.py	Sun Feb 03 19:29:05 2008 -0600
+++ b/mercurial/util.py	Sun Feb 03 19:29:05 2008 -0600
@@ -895,6 +895,10 @@
     function if need.'''
     return path.split(os.sep)
 
+def gui():
+    '''Are we running in a GUI?'''
+    return os.name == "nt" or os.name == "mac" or os.environ.get("DISPLAY")
+
 # Platform specific variants
 if os.name == 'nt':
     import msvcrt