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Date: Sun, 20 Apr 2014 09:29:22 +0000
From: Alexey Dokuchaev <danfe@FreeBSD.org>
To: Adam Weinberger <adamw@adamw.org>
Subject: Re: Commit logs for 2014/04/11
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On Sat, Apr 12, 2014 at 10:11:44AM -0400, Adam Weinberger wrote:
> * Please, please don't mandate .sample. Plenty of of ports install

Actually, it's not really ".sample".  It's any six-letter word if I read the
code correctly.

>   sample conf files with different extension. "-dist" is very common
>   for php ports, for example. Let @sample take two arguments. Like
> 	@sample etc/pants.conf-dist pants.conf

Why do we need the second argument?  Can't we just use the rightmost
extension?  Proof of concept attached.

./danfe

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Index: /usr/ports/Keywords/pkg_install.awk
===================================================================
--- /usr/ports/Keywords/pkg_install.awk	(revision 351320)
+++ /usr/ports/Keywords/pkg_install.awk	(working copy)
@@ -15,9 +15,10 @@
 #  @comment end @sample somefile.conf.sample
 # 
 $1 == "@sample" {
-  sample_file=$2
-  # Take out .sample
-  target_file=substr(sample_file, 0, length(sample_file) - 7)
+  sample_file = $2
+  # Take out the rightmost (last) extension
+  lastsep = match(sample_file, "[-.][^-.]+$")
+  target_file = substr(sample_file, 0, lastsep - 1)
   print "@comment begin " $0
   print "@unexec if cmp -s '%D/" target_file "' '%D/" sample_file "'; then rm -f '%D/" target_file "'; fi"
   print sample_file

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