Re: [Monotone-devel] get rev_id of merge

[Thomas Keller]

Am 05.05.10 09:02, schrieb Stephen Leake:
> Thomas Keller <address@hidden> writes:
> 
>> Am 04.05.10 16:18, schrieb Stephen Leake:
>>> I'm trying to get the rev_id of a merge, in a Lua test. Can anyone tell
>>> me why this doesn't work? I based it on base_revision().
>>>
>>> function merged_revision()
>>>   local workrev = readfile("stderr")
>>>   local extract = string.gsub(workrev, "^mtn: %[merged%] (%x*)$", "%1")
>>
>> This will not work with multi-line string input, because ^ marks the
>> very beginning and $ the very end of the string, not the line. But even
>> if you remove these, you'll only process the replacement of the matched
>> line, while you actually want to extract something. This should work better:
>>
>> local extract = string.match(workrev, "mtn: %[merged%] (%x*)")
> 
> That does work, and is clearer, but I don't understand the explanation.
> Why does base_revision work?
> 
> Not a very important question, but it bothers me.

I think this works because of the .* before and after the search
pattern. I tried this locally before as well, but couldn't get it to work.

Thomas.

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