only build cmake if needed

svn path=/trunk/KDE/kdesdk/scripts/kdesvn-build-coverity; revision=574251

kdesvn-build-coverity

@@ -111,6 +111,20 @@ sub download_install_dbus()
     return 1;
 }
 
+# This subroutine checks if an appropriate dbus software is already installed.
+# Currently this means DBUS 0.62. 
+#
+# Return value is true if DBUS is installed, 0 otherwise.
+
+sub check_cmake_installed()
+{
+    my $minVersion = '2.4-patch 3';
+
+    my $result = system('cmake', '--version');
+
+    return ($result >> 8) == 0 && ($result =~ $minVersion);
+}
+
 # This subroutine downloads CMake if necessary, builds and installs it (all
 # in one step: there is no separate update then install).
 #
@@ -190,6 +204,8 @@ sub download_install_cmake()
     return 1;
 }
 
+
+
 # This subroutine is run after the lock has been obtained, but before performing
 # any updates or builds.  Do any steps that need to be done only in the case of
 # being run by Coverity.  This subroutine is only called if the COVERITY_RUN
@@ -217,7 +233,17 @@ sub perform_coverity_checks()
         system("pkg-config", "--variable=prefix", "dbus-1");
     }
 
-    download_install_cmake();
+    unless (check_cmake_installed())
+    {
+        info "CMake 2.4.3 does not appear to be installed.  At least its not in \$PATH";
+        info "So just for you guys, I'll go ahead and install it for you.";
+
+        if (not download_install_cmake())
+        {
+            error "\nWell, we were b[r[unable to install] CMake for some reason.";
+            error "Check your logs afterwards.";
+        }
+    }
 
     # Print blank line.
     info "";