Patrick O'Callaghan wrote: > On Mon, 2018-06-04 at 19:55 +0800, Ed Greshko wrote: >> On 06/04/18 18:58, Patrick O'Callaghan wrote: >>> On Sun, 2018-06-03 at 20:07 -0400, Robert Moskowitz wrote: >>>> I see the following rpms in the repo: >>>> >>>> # grep xml2rfc dnf.lst >>>> python2-xml2rfc.noarch 2.5.2-4.fc28 fedora >>>> python3-xml2rfc.noarch 2.5.2-4.fc28 fedora >>>> >>>> yet: >>>> >>>> # dnf install xml2rfc >>>> Last metadata expiration check: 2:22:41 ago on Sun 03 Jun 2018 05:33:23 >>>> PM EDT. >>>> No match for argument: xml2rfc >>>> Error: Unable to find a match >>> >>> Shouldn't that be 'dnf install python3-xml2rfc'? >> >> Yes. But you have to admit that there are inconsistencies in the way things >> are done.... >> >> [root@f27k ~]# which tracer >> /usr/bin/which: no tracer in >> (/usr/lib64/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin) >> >> The available packages are... >> >> python2-dnf-plugin-tracer.noarch 2.0.5-1.fc27 >> updates >> python2-tracer.noarch 0.7.0-1.fc27 >> updates >> python3-dnf-plugin-tracer.noarch 2.0.5-1.fc27 >> updates >> python3-tracer.noarch 0.7.0-1.fc27 >> updates >> tracer-common.noarch >> >> No package named "tracer", yet.... >> >> [root@f27k ~]# dnf install tracer >> Last metadata expiration check: 0:51:26 ago on Mon 04 Jun 2018 07:03:05 PM >> CST. >> Dependencies resolved. >> =================================================================================== >> Package Arch Version Repository >> Size >> =================================================================================== >> Installing: >> python3-tracer noarch 0.7.0-1.fc27 updates >> 129 k >> > [...] > > Yes. 'dnf list tracer' and 'dnf info tracer' both show nothing, though > 'dnf search tracer' does find it. There appears to be more than one > 'name' associated with some packages and how this works is not clearly > documented.
The manpage for dnf documents what the search command uses to find results. The important part is that "by default the command will only look at package names and summaries, failing that (or whenever ``all`` was given as an argument) it will match against package descriptions and URLs." That's why 'dnf search' finds results for tracer. The reason that 'dnf install tracer' installs python3-tracer is because python3-tracer has a 'Provides' tag for tracer. There isn't a similar provides for 'xml2rfc' by name, but you can install using the /usr/bin/xml2rfc 'Provides' with 'dnf install /usr/bin/xml2rfc'. Using 'dnf provides xml2rfc' shows that path-based 'Provides'. -- Todd ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Many questions are unanswerable. Many answers are questionable.
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