There are two completion scripts available, ovs-appctl-bashcomp.bash and ovs-vsctl-bashcomp.bash respectively.
ovs-appctl-bashcomp.bash adds bash command-line completion support for ovs-appctl, ovs-dpctl, ovs-ofctl and ovsdb-tool commands.
display available completion or complete on unfinished user input (long option, subcommand, and argument). once the subcommand (e.g. ofproto/trace) has been given, the script will print the subcommand format. the script can convert between keywords like 'bridge/port/interface/dp' and the available record in ovsdb.
only support small set of important keywords (dp, datapath, bridge, switch, port, interface, iface). does not support parsing of nested options (e.g. ovsdb-tool create [db [schema]]). does not support expansion on repeatitive argument (e.g. ovs-dpctl show [dp...]). only support matching on long options, and only in the format (--option [arg], i.e. should not use --option=[arg]).
ovs-vsctl-bashcomp.bash adds bash command-line completion support for ovs-vsctl command.
display available completion and complete on user input for global/local options, command, and argument. query database and expand keywords like 'table/record/column/key' to available completions. deal with argument relations like 'one and more', 'zero or one'. complete multiple ovs-vsctl commands cascaded via '--'.
completion of very long ovs-vsctl command can take up to several seconds.
The bashcomp scripts should be placed at /etc/bashcompletion.d/ to be available for all bash sessions. Running 'make install' will place the scripts to $(sysconfdir)/bashcompletion.d/. So user should specify --sysconfdir=/etc at configuration. Meanwhile, if OVS is installed from packages, the scripts will automatically be placed inside /etc/bash_completion.d/.
If you just want to run the scripts in one bash, you can remove them from /etc/bash_completion.d/ and run the scripts via '. ovs-appctl-bashcomp.bash' or '. ovs-vsctl-bashcomp.bash'.
Unit tests are added in tests/completion.at and integrated into autotest framework. To run the tests, just do make check.
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