Forum: Cfengine Help Subject: Looking for suggestions on ordering Author: Authority Link to topic: https://cfengine.com/forum/read.php?3,17628,17628#msg-17628
Normal ordering for edit_line bundles puts insert_lines before replace_patterns. For my current problem, I'm trying to reverse them. Given a simple syntax like this: option = value I would like to check that the option exists and simply replace the current value with the new value and if the option doesn't exist, add the line. This is problematic though because the syntax of my files are flexible regarding white space but insert_lines is not. If my insert_lines promiser does not have any whitespace around the equals sign but the file does, or if the option is indented, even though the option and value are as they should be, Cfengine will insert a new line. Replace_patterns is powerful enough to handle and preserve whitespace but I'm having trouble stopping the insert_line from happening after replace_patterns has already done its work. I only want the insert_line to happen if the replace_pattern couldn't find and replace the value. I've found that a replace_patterns promise that doesn't match anything (and thus doesn't replace anything) is still marked as kept, which I can kind of understand (nothing to do is just as good as already being done), but it makes it very hard to determine if replace_patterns took any action. I've tried setting a class at the start of the bundle that blocked the insert_lines promises and was cancelled by replace_patterns, but that class was reactivated when the bundle was re-evaluated so my inserts never happened. I'm not going to argue that the normal ordering be changed as I think for most cases, it is optimal already, but I'm wondering if a new promise result class attribute (for use in class bodies) might be worthwhile, something along the lines of match_found, that would activate classes if the regex in the current promise succeeded. Has anyone else dealt with such ordering issues? Any suggestions/tricks on how to do this? _______________________________________________ Help-cfengine mailing list Help-cfengine@cfengine.org https://cfengine.org/mailman/listinfo/help-cfengine
