Bug#4644: dpkg --compare-versions reality and documentation differ
Package: dpkg
Version: 1.4.0
dpkg -h says:
Comparison operators for --compare-versions are:
lt le eq ne ge gt (treat no version as earlier than any version);
lt-nl le-nl ge-nl gt-nl (tread no version as later than any version);
< << <= = >= >> > (only for compatibility with control file syntax).
BTW, that's a typo 'tread' should be 'treat', I think
Yet:
$ dpkg --compare-versions 1.2.3 '<<' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
Surprisingly, '>>' works.
$ dpkg --compare-versions 5.2.3 '<=' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
Surprisingly '>=' works.
$ dpkg --compare-versions 5.2.3 '=' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
$ dpkg --compare-versions 5.2.3 'lt-nl' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
$ dpkg --compare-versions 5.2.3 'ge-nl' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
$ dpkg --compare-versions 5.2.3 'gt-nl' 4.5.6
dpkg: --cmpversions bad relation
Type dpkg --help for help about installing and deinstalling packages [*];
Use dselect for user-friendly package management;
Type dpkg -Dhelp for a list of dpkg debug flag values;
Type dpkg --force-help for a list of forcing options;
Type dpkg-deb --help for help about manipulating *.deb files;
Type dpkg --licence for copyright licence and lack of warranty (GNU GPL) [*].
Options marked [*] produce a lot of output - pipe it through `less' or `more' !
--
Christopher J. Fearnley | Linux/Internet Consulting
cjf@netaxs.com | UNIX SIG Leader at PACS
http://www.netaxs.com/~cjf | (Philadelphia Area Computer Society)
ftp://ftp.netaxs.com/people/cjf | Design Science Revolutionary
"Dare to be Naive" -- Bucky Fuller | Explorer in Universe
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