SVN: Head revision number auto update in code files

[Eilers Stefan]

Dear Sir or Madam,

 

I want to implement the head revision number in my C project at the file version.h.

Unfortunately there is only the codeword $Revision$ to set the last revision where the file version.h was changed:

#define VERSION      " FW.Vers. 0.0 $Revision: 146 $\n"

 

Is it possible to implement the Keyword $Head$ to always (every commit) update the string to the head revision number?

e.G.:

#define VERSION      " FW.Vers. 0.0 $Head: 153 $\n"

The problem was detected e.G. here:

http://hobiger.org/blog/2013/04/18/svn-revision-number-in-c-code-an-impossible-task/

 

See SVN Manual (V1.8): 4.17.1.1. svn:keywords

 

Best regards

 

Stefan Eilers

M.Sc., Dipl.-Ing (FH)
Entwickler
IK Elektronik GmbH

Tel. +49 (0)351 426403-82
Fax +49 (0)351 426403-72
eilers...@ik-elektronik.com

 

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[Elias Gerber]

On 14.08.2013 08:33, Eilers Stefan wrote:

Dear Sir or Madam,

 

I want to implement the head revision number in my C project at the file version.h.

Unfortunately there is only the codeword $Revision$ to set the last revision where the file version.h was changed:

#define VERSION      " FW.Vers. 0.0 $Revision: 146 $\n"

 

Is it possible to implement the Keyword $Head$ to always (every commit) update the string to the head revision number?

e.G.:

#define VERSION      " FW.Vers. 0.0 $Head: 153 $\n"

The problem was detected e.G. here:

http://hobiger.org/blog/2013/04/18/svn-revision-number-in-c-code-an-impossible-task/

Why do you need the revision in the file commited? I guess you want to display the version somewhere in the binary program?
We do this by creating a file version.h.template that contains the $Revision keyword. In a pre-build step we copy the version.h.template to version.h, then run subwcrev to replace $Revision with the svn-revision value. Then we start the build-process that uses version.h.
version.h.template is added to svn (but it never changes) while version.h is ignored in svn, so that we dont run into the same chicken-egg-problem.
I dont know if this approach solves your task, just an idea.
Cheers Elias

[Lorenz]

Eilers Stefan wrote:

>I want to implement the head revision number in my C project at the file version.h.

http://subversion.apache.org/faq.html#version-value-in-source
--

Lorenz

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[Bob Archer]

> I want to implement the head revision number in my C project at the file
> version.h.
> Unfortunately there is only the codeword $Revision$ to set the last revision
> where the file version.h was changed:
> #define VERSION      " FW.Vers. 0.0 $Revision: 146 $\n"
>
> Is it possible to implement the Keyword $Head$ to always (every commit)
> update the string to the head revision number?
> e.G.:
> #define VERSION      " FW.Vers. 0.0 $Head: 153 $\n"
>
> The problem was detected e.G. here:
> http://hobiger.org/blog/2013/04/18/svn-revision-number-in-c-code-an-
> impossible-task/
>
> See SVN Manual (V1.8): 4.17.1.1. svn:keywords
>
> Best regards

I'm pretty sure keyword expansion is done on checkout/update not on commit. So, no, I doubt this would be possible. Generally you should have your build scripts set the version in your header file to match the HEAD revision.

BOb

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[Stefan Küng]

On 14.08.2013 12:19, Lorenz wrote:
> Eilers Stefan wrote:
>
>> I want to implement the head revision number in my C project at the file version.h.
>
> http://subversion.apache.org/faq.html#version-value-in-source
>

Better:
http://tortoisesvn.net/faq.html#subwcrev

Stefan

--
___
oo // \\ "De Chelonian Mobile"
(_,\/ \_/ \ TortoiseSVN
\ \_/_\_/> The coolest interface to (Sub)version control
/_/ \_\ http://tortoisesvn.net

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[Lorenz]

Stefan Küng wrote:

>On 14.08.2013 12:19, Lorenz wrote:
>> Eilers Stefan wrote:
>>
>>> I want to implement the head revision number in my C project at the file version.h.
>>
>> http://subversion.apache.org/faq.html#version-value-in-source
>>
>
>Better:
>http://tortoisesvn.net/faq.html#subwcrev

if you're on windows 8-)
--

Lorenz

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[Ulrich Eckhardt]

Am 14.08.2013 08:33, schrieb Eilers Stefan:
> I want to implement the head revision number in my C project at the
> file version.h.
>
> Unfortunately there is only the codeword $Revision$ to set the last
> revision where the file version.h was changed:
>
> #define VERSION " FW.Vers. 0.0 $Revision: 146 $\n"

In most cases when someone asks for something like this, their desire
for this is to use it to achieve something else. Using the repository's
revision number is a bad idea though, because all it represents is the
sequence number of its internal state. For determining versions of
projects, it is useless and even confusing, because it is incremented on
any change in any branch of any project contained in that repository.
Even worse, checking out an old revision will not give you the same HEAD
revision as before the last commit. Lastly, you have to remember, SVN
doesn't define the term "project" at all, let alone support it in any
way, but just versions a tree of files in a repository.

Therefore: Use proper branches/tags where you assign meaningful names
and then use e.g. the $Id$ keyword to retrieve that part of the name or
maybe even set it in the according commit. Alternatively, stop
complaining that some solution doesn't work for your problem and
describe the actual problem instead.

Uli
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[Bob Archer]

> On 14.08.2013 12:19, Lorenz wrote:
> > Eilers Stefan wrote:
> >
> >> I want to implement the head revision number in my C project at the file
> version.h.
> >
> > http://subversion.apache.org/faq.html#version-value-in-source
> >
>
> Better:
> http://tortoisesvn.net/faq.html#subwcrev
>
> Stefan

When I try to hit the link in this topic to see the version.in file, I get a basic auth prompt. Is the tsvn repo not readable by anon callers?

BOb

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[Sergey Azarkevich]

When I try to hit the link in this topic to see the version.in file, I get a basic auth prompt. Is the tsvn repo not readable by anon callers?

BOb

Correct link:

https://code.google.com/p/tortoisesvn/source/browse/trunk/version.build.in