rpp_update_doc: Implement printing of diffs

For buildbot users to see the reason of failure.

diff --git a/rpp/blocks/rpp_update_doc.m b/rpp/blocks/rpp_update_doc.m
index 34a99c48f7d1f7eaef925093ac0579c3c3a1ebbc..7ac33d8f07d8488a320722fad85d9c75d4725960 100644 (file)
--- a/rpp/blocks/rpp_update_doc.m
+++ b/rpp/blocks/rpp_update_doc.m
@@ -1,7 +1,13 @@
-function updated = rpp_update_doc
+function updated = rpp_update_doc(varargin)
 % RPP_UPDATE_DOC Update built-in S-functions documentation.
 %    The documentation is updated based on the YAML comment in .c files.
 %    The number of updated blocks is returned.
+if nargin > 0,
+    arg = varargin{1};
+else
+    arg = '';
+end
+open('rpp_lib');
 set_param('rpp_lib', 'Lock', 'off');
 blocks = find_system('rpp_lib', 'Type', 'block');
 updated = 0;
@@ -19,10 +25,28 @@ for i=1:length(blocks),
     old_help = get_param(blocks{i}, 'MaskHelp');
     if ~strcmp(old_help, new_help),
         disp([blocks{i} ': Help not up-to-date - upating'])
-        set_param(blocks{i}, 'MaskHelp', new_help)
+        if strcmp(arg, 'diff'),
+            print_diff(fn, old_help, new_help)
+        else
+            set_param(blocks{i}, 'MaskHelp', new_help)
+        end
         updated = updated + 1;
     else
         disp([blocks{i} ': Help up-to-date'])
     end
 end
-set_param('rpp_lib', 'Lock', 'on');
\ No newline at end of file
+set_param('rpp_lib', 'Lock', 'on');
+
+function print_diff(fn, old, new)
+    f = fopen([fn '.help.old'], 'w');
+    fprintf(f, '%s', old);
+    fclose(f);
+    
+    f = fopen([fn '.help.new'], 'w');
+    fprintf(f, '%s', new);
+    fclose(f);
+
+    [rc, diff] = system(['diff -u ' fn '.help.old ' fn '.help.new']);
+    disp(diff);
+    delete([fn '.help.old']);
+    delete([fn '.help.new']);