svn commit: r51255 - head/en_US.ISO8859-1/books/porters-handbook/makefiles

Author: mat
Date: Mon Dec  4 16:30:25 2017
New Revision: 51255
URL: https://svnweb.freebsd.org/changeset/doc/51255

Log:
  Add two examples of `pkg version -t` usage inside examples.
  
  Sponsored by:	Absolight

Modified:
  head/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml

Modified: head/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml
==============================================================================
--- head/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml	Mon Dec  4 04:16:21 2017	(r51254)
+++ head/en_US.ISO8859-1/books/porters-handbook/makefiles/chapter.xml	Mon Dec  4 16:30:25 2017	(r51255)
@@ -290,7 +290,11 @@ DISTVERSION=	1.2-pre4</programlisting>
 DISTVERSION=	1.2p4</programlisting>
 
 	<para>Both will generate a <varname>PORTVERSION</varname> of
-	  <literal>1.2.p4</literal>.</para>
+	  <literal>1.2.p4</literal> which is before than 1.2.
+	  &man.pkg-version.8; can be used to check that fact:</para>
+
+	<screen>&prompt.user; <userinput>pkg version -t 1.2.p4 1.2</userinput>
+&lt;</screen>
       </example>
 
       <example xml:id="makefile-versions-ex4">
@@ -309,7 +313,27 @@ PORTVERSION=	1.2p4</programlisting>
 	<para>In this case, using <varname>DISTVERSION</varname> is
 	  not possible because it would generate a version of
 	  <literal>1.2.p4</literal> which would be before
-	  <literal>1.2</literal> and not after.</para>
+	  <literal>1.2</literal> and not after.  &man.pkg-version.8;
+	  will verify this:</para>
+
+	<screen>&prompt.user; <userinput>pkg version -t 1.2 1.2.p4</userinput>
+&gt; <co xml:id="makefile-versions-ex4-co1"/>
+&prompt.user; <userinput>pkg version -t 1.2 1.2p4</userinput>
+&lt; <co xml:id="makefile-versions-ex4-co2"/></screen>
+
+	<calloutlist>
+	  <callout arearefs="makefile-versions-ex4-co1">
+	    <para><literal>1.2</literal> is after
+	      <literal>1.2.p4</literal>, which is
+	      <emphasis>wrong</emphasis> in this case.</para>
+	  </callout>
+
+	  <callout arearefs="makefile-versions-ex4-co2">
+	    <para><literal>1.2</literal> is before
+	      <literal>1.2p4</literal>, which is what was
+	      needed.</para>
+	  </callout>
+	</calloutlist>
       </example>
 
       <para>For some more advanced examples of setting
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