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150 lines
6.8 KiB
Fish
150 lines
6.8 KiB
Fish
# Fish completions for systemd's "busctl" dbus tool
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# TODO:
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# One issue is that sometimes these will come to a dead-end e.g. when a particular interface has no properties
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# Another is that some busnames aren't accesible by the current user
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# but this can't be predicted via the user that owns that name, e.g. `org.freedesktop.login1`
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# is usually owned by a root-owned process, yet accessible (at least in part) by normal users
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# A simple wrapper to call busctl with the correct mode and output
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function __fish_busctl
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# TODO: If there's a "--address" argument we need to pass that
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# We also need to pass the _last_ of these (`busctl --user --system` operates on the system bus)
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set -l mode
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if __fish_contains_opt user
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set mode "--user"
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else
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set mode "--system"
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end
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command busctl $mode $argv --no-legend --no-pager ^/dev/null
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end
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# Only get the arguments to the actual command, skipping all options and arguments to options
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function __fish_busctl_get_command_args
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set -l skip
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set -l skip_next 0
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set -l cmd (commandline -opc)
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for token in $cmd
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switch $token
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# Options that take arguments - when given without "=", the next token is the arg - skip it
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case '--address' '--match' '--expect-reply' '--auto-start' '--allow-interactive-authorization' \
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'--timeout' '--augment-creds' '-H' '--host' '-M' '--machine'
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set skip_next 1
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continue
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# Skip all options themselves
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case '-*'
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continue
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# Command args only start after a command
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case 'status' 'monitor' 'capture' 'tree' 'introspect' 'call' 'get-property' 'set-property'
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set -e skip
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continue
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# These take no arguments, so abort completion
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case 'list' 'help'
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break
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case '*'
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if test "$skip_next" -eq 1; or set -q skip
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set skip_next 0
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continue
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end
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echo $token
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end
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end
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end
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function __fish_busctl_busnames
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__fish_busctl list --acquired | string replace -r '\s+.*$' ''
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# Describe unique names (":1.32") with their process (e.g. `:1.32\tsteam`)
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__fish_busctl list --unique | string replace -r '\s+\S+\s+(\S+)\s+.*$' '\t$1'
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end
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function __fish_busctl_objects -a busname
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__fish_busctl tree --list $busname | string replace -r '\s+.*$' ''
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end
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function __fish_busctl_interfaces -a busname -a object
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__fish_busctl introspect --list $busname $object | string replace -r '\s+.*$' ''
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end
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function __fish_busctl_members -a type -a busname -a object -a interface
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__fish_busctl introspect --list $busname $object $interface \
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| string match -- "* $type *" | string replace -r '.(\S+) .*' '$1'
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end
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function __fish_busctl_signature -a busname -a object -a interface -a member
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__fish_busctl introspect --list $busname $object $interface \
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| string match ".$member *" | while read a b c d; echo $c; end
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end
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# This function completes service/busname, object, interface and then whatever the arguments are
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# i.e. if argv[1] is "method", complete methods in the fourth place
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function __fish_busctl_soi
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set -l args (__fish_busctl_get_command_args)
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set -l num (count $args)
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switch $num
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case 0 # We have nothing, need busname
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__fish_busctl_busnames
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case 1 # We have busname, need object
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__fish_busctl_objects $args
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case 2 # We have busname and object, need interface
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__fish_busctl_interfaces $args
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case '*' # We have busname and object and interface, what we need now depends on the command, so we get it as argument
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if test $num -ge 4; and set -q argv[2] # Check >= 4 to repeat the last type for get-property
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# Signatures have to be handled specially, because they're dependent on the member (method/property)
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# that's at the beginning of the line and prefixed with a "."
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# I.e. `busctl introspect` will print ".Capacity", but the argument to give to `get-property` is "Capacity"
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if test "$argv[2]" = "signature"
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__fish_busctl_signature $args
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else
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__fish_busctl_members $argv[2] $args
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end
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else if test $num -ge 3; and set -q argv[1]
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__fish_busctl_members $argv[1] $args
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else
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return 1
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end
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end
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end
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### Commands
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set -l commands list status monitor capture tree introspect call get-property set-property help
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complete -f -e -c busctl
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complete -A -f -c busctl -n "not __fish_seen_subcommand_from $commands" -a "$commands"
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### Arguments to commands
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# "status" only takes a single service as argument
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complete -f -c busctl -n "__fish_seen_subcommand_from status; and not count (__fish_busctl_get_command_args)" -a "(__fish_busctl_busnames)"
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# These take multiple services
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complete -x -c busctl -n "__fish_seen_subcommand_from monitor capture tree" -a "(__fish_busctl_busnames)"
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# Read the busctl_soi calls as "Complete service, then object, then interface and then the arguments
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# e.g. `call` takes service object interface method signature arguments
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# We can't complete the arguments (without parsing the signature, which can look like "a{sv}" for an array of string-to-variant dictionaries)
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complete -x -c busctl -n "__fish_seen_subcommand_from call" -a "(__fish_busctl_soi method signature)"
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complete -x -c busctl -n "__fish_seen_subcommand_from get-property" -a "(__fish_busctl_soi property)"
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complete -x -c busctl -n "__fish_seen_subcommand_from set-property" -a "(__fish_busctl_soi property signature)"
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complete -x -c busctl -n "__fish_seen_subcommand_from introspect" -a "(__fish_busctl_soi)"
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# Flags
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# These are incomplete as I have no idea how to complete --address= or --match=
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complete -f -c busctl -n "__fish_seen_subcommand_from call" -l quiet -d 'Suppress message payload display'
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complete -f -c busctl -n "__fish_seen_subcommand_from call get-property" -l verbose
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complete -f -c busctl -n "__fish_seen_subcommand_from tree" -l list -d 'Show a flat list instead of a tree'
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complete -x -c busctl -n "__fish_seen_subcommand_from call" -l expect-reply -a "yes no"
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complete -x -c busctl -n "__fish_seen_subcommand_from call" -l auto-start -a "yes no" -d 'Activate the peer if necessary'
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complete -x -c busctl -n "__fish_seen_subcommand_from call" -l allow-interactive-authorization -a "yes no"
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complete -x -c busctl -n "__fish_seen_subcommand_from call" -l timeout -a "(seq 0 100)"
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complete -f -c busctl -n "__fish_seen_subcommand_from list" -l unique -d 'Only show unique (:X.Y) names'
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complete -f -c busctl -n "__fish_seen_subcommand_from list" -l acquired -d 'Only show well-known names'
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complete -f -c busctl -n "__fish_seen_subcommand_from list" -l activatable -d 'Only show peers that have not been activated yet but can be'
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complete -f -c busctl -n "__fish_seen_subcommand_from list" -l show-machine -d 'Show the machine the peers belong to'
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complete -x -c busctl -n "__fish_seen_subcommand_from list status" -l augment-creds -a "yes no"
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complete -f -c busctl -l user
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complete -f -c busctl -l system
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complete -f -c busctl -s H -l host -a "(__fish_print_hostnames)"
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complete -f -c busctl -s M -l machine -a "(__fish_systemd_machines)"
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complete -f -c busctl -l no-pager
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complete -f -c busctl -l no-legend
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complete -f -c busctl -s h -l help
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complete -f -c busctl -l version
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