Ant Build Read version number from svn log output

Question

Requirement:

Run svn log -l 1 command and this will have an output like this.

    ------------------------------------------------------------------------
    r2633 | name | 2012-11-07 17:28:20 +0530 (Wed, 07 Nov 2012) | 1 line
    My comment.
    ------------------------------------------------------------------------

I need to extract the revision number 2633 and assign this as a property. I would prefer to avoid ant-contrib.

What I tried:

<echo>Run svn log -l 1</echo>
<exec executable="svn" outputproperty="svn.output" failonerror="false">
    <arg line="log -l 1"/>
</exec>   
<echo message="Output was: ${svn.output}" />

This gets the above output inside the property ${svn.ouput} but am not sure how do I extract version from this.

Other option is to write the variable in file, but again how do I extract the version into a property?

Thanks in advance.

svn log -q -l 1 will be better. Can you use pipes inside exec some way? — Lazy Badger, Dec 01 '12 at 05:51
svn log | grep r | gawk {'print $1'} or write **pure revision** into file with subwcrev — Lazy Badger, Dec 01 '12 at 05:54
I am doing it on windows so cant use grep. But thanks for suggestion. — PravinCG, Dec 01 '12 at 07:28
When you actually only want the revision number, see the answer to this question: http://stackoverflow.com/questions/1065130/how-can-i-get-the-revision-number-into-an-ant-property-in-luntbuild — mthomas, Dec 01 '12 at 23:40
@mthomas Thanks for suggestion. However I would not like to add any dependencies. — PravinCG, Dec 02 '12 at 05:39

score 2 · Accepted Answer · edited May 23 '17 at 10:28

2

There isn't a clean way to pull out a substring from a property in standard Ant. See this Stack Overflow answer for some alternative solutions.

edited May 23 '17 at 10:28

Community

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answered Nov 30 '12 at 17:35

gareth_bowles

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That is true. Thanks for the link, I had referred that earlier. I was wondering if using file to write output and then read the data required using regex would be better. I would like to avoid any more dependencies. – PravinCG Nov 30 '12 at 17:38
The fourth answer in the link does exactly that - writes a temp. file and searches it with a regex. – gareth_bowles Nov 30 '12 at 17:58

Ant Build Read version number from svn log output

1 Answers1