tar version comparison

[Toby Peterson]

pextlib provides 'rpm-vercomp' which probably does what you want.

- Toby

On Jul 1, 2009, at 2:16 PM, Darren Weber wrote:

>
> I need to test if the system has a tar version between 1.14 and  
> 1.14.90, what is the best way to do this in tcl?
>
> I have the following tcl script snippet, but there may be an easier  
> way.
>
> # tar-1.14 uses --strip-path, tar-1.14.90+ uses --strip-components
> set tarArg "--strip-components"
> set tarVersion [lrange [split [exec tar --version]] 3 3]
> set tarMaj [lrange [split $tarVersion .] 0 0]
> set tarMin [lrange [split $tarVersion .] 1 1]
> set tarRev [lrange [split $tarVersion .] 2 2]
> if ([expr $tarMaj == 1 && $tarMin == 14 && $tarRev < 90]) {
>       set tarArg "--strip-path"
> }
>
> For example, on OSX 10.5.x we get these results from /usr/bin/tar:
>
> % set tarVer [lrange [split [exec tar --version]] 3 3]
> 1.15.1
> % set tarMaj [lrange [split $tarVer .] 0 0]
> 1
> % set tarMin [lrange [split $tarVer .] 1 1]
> 15
> % set tarRev [lrange [split $tarVer .] 2 2]
> 1
> % set tarArg "--strip-components"
> --strip-components
> % if ([expr $tarMaj == 1 && $tarMin == 14 && $tarRev < 90]) {
> set tarArg "--strip-path"
> }
> % puts $tarArg
> --strip-components
> 0
> %
>
> TIA,
> Darren
>
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