Re: Look-ahead regex, not matching?

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Respond to Bob <[email protected]>: [help-cfengine] Re: Look-ahead regex, not matching? :email:
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  Hey Bob,

        When I change it to this, it works:

        edit_line => my_replace("\*mode:\s+(?!blank.*).*", "*mode:
                                  blank"),

        In my short test file, it works just fine. However, when I
        add it to my site.cf file:

           error: Promised replacement '*mode: blank' for pattern
        '^(\* mode:\s+(?!blank.*).*)$' is not properly convergent
        while editing '/etc/X11/app- defaults/XScreenSaver-nogl'
        (pattern still matches the end-state replacement string
        '*mode: blank', consider use of a negative look ahead)
        error: Errors encountered when actuating replace_patterns
        promise '^(\*mode:\ s+(?!blank.*).*)$'

        What could be the difference?

  I think it should be like this:

  ,----
  | edit_line     => my_replace("\*mode:\s+(?!blank$).*$",
  `----

  But, I think that this might be of use to you as well:
  <https://gist.github.com/nickanderson/1ffd7936b66b4a7c1e703fbbdc49e0d1>

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<p>
Hey Bob,
</p>

<blockquote style="border-left: 2px solid gray; padding-left: 4px;">
<p>
When I change it to this, it works:
</p>

<p>
edit_line     =&gt; my_replace("\*mode:\s+(?!blank.*).*",
                          "*mode:                       blank"),
</p>

<p>
In my short test file, it works just fine. However, when I add it to my site.cf file:
</p>

<p>
   error: Promised replacement '<b>mode:                  blank' for pattern '^(\</b>
mode:\s+(?!blank.*).*)\(' is not properly convergent while editing '/etc/X11/app-
   defaults/XScreenSaver-nogl' (pattern still matches the end-state replacement string '*mode:                     blank', consider use of a negative look ahead)
      error: Errors encountered when actuating replace_patterns promise '^(\*mode:\
   s+(?!blank.*).*)\)'
</p>

<p>
What could be the difference?
</p>
</blockquote>

<p>
I think it should be like this:
</p>

<pre class="example" id="orgc0270d6">
edit_line     =&gt; my_replace("\*mode:\s+(?!blank$).*$",
</pre>

<p>
But, I think that this might be of use to you as well: <a href="https://gist.github.com/nickanderson/1ffd7936b66b4a7c1e703fbbdc49e0d1">https://gist.github.com/nickanderson/1ffd7936b66b4a7c1e703fbbdc49e0d1</a>
</p>

<p></p>

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--
Nick Anderson | Doer of Things | (+1) 785-550-1767 | https://northern.tech

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