[libvirt] [PATCH RFC 0/2] virsh: Introduce basic autocompletion

This is supposed to go on the top of: https://www.redhat.com/archives/libvir-list/2017-October/msg01367.html Before digging any deeper to this hole I want to make sure that this approach is acceptable. So how does this work. The idea is to have handful of generic functions that fetch names (so called completers). Basically, one completer per each libvirt object. The returned names are then matched against (partial) user input and only matching strings are then offered to the user. Moreover, among having .completer each option has .completer_flags which can refine the completer's behaviour. For instance, in 2/2 I'm introducing virshDomainNameCompleter() which does nothing more than virConnectListAllDomains(). However, since it doesn't make much sense to start already running domain, for the 'start' command .completer_flags is set to VIR_CONNECT_LIST_DOMAINS_INACTIVE so that only inactive domains are returned in the list. What is missing? What is implemented here are vshCmdOptDef completers. The general vshCmdDef completers are still missing. Therefore: virsh # start --domain<TAB><TAB> works and lists inactive domains, but: virsh # start<TAB><TAB> doesn't (well, apart from offering options for the 'start' command). While that would be certainly nice feature to have, it'd require more work, because some arguments are "implicit" based on position. For instance: virsh # attach-interface fedora network default which is equivalent to: virsh # attach-interface --domain fedora --type network --source default Also, bash autocompletion is missing. The idea there is to have an unlisted virsh command that the bash script can call in order to fetch list of options. But again, no movement in that area yet. Michal Privoznik (2): vsh: Call vshCmdOptDef.completer properly virsh: Introduce virshDomainNameCompleter tools/virsh-domain-monitor.c | 30 +++---- tools/virsh-domain.c | 182 ++++++++++++++++++++++--------------------- tools/virsh-snapshot.c | 24 +++--- tools/virsh.c | 43 ++++++++++ tools/virsh.h | 8 +- tools/vsh.c | 45 ++++++----- 6 files changed, 194 insertions(+), 138 deletions(-) -- 2.13.6