mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-25 19:15:34 +00:00
82394debb7
The approach is lifted from cobra: `tailscale completion bash` emits a bash
script for configuring the shell's autocomplete:
. <( tailscale completion bash )
so that typing:
tailscale st<TAB>
invokes:
tailscale completion __complete -- st
RELNOTE=tailscale CLI now supports shell tab-completion
Fixes #3793
Signed-off-by: Paul Scott <paul@tailscale.com>
249 lines
9.9 KiB
Fish
249 lines
9.9 KiB
Fish
# Copyright 2013-2023 The Cobra Authors
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# fish completion for %-36[1]s -*- shell-script -*-
|
|
|
|
function __%[1]s_debug
|
|
set -l file "$BASH_COMP_DEBUG_FILE"
|
|
if test -n "$file"
|
|
echo "$argv" >> $file
|
|
end
|
|
end
|
|
|
|
function __%[1]s_perform_completion
|
|
__%[1]s_debug "Starting __%[1]s_perform_completion"
|
|
|
|
# Extract all args except the last one
|
|
set -l args (commandline -opc)
|
|
# Extract the last arg and escape it in case it is a space
|
|
set -l lastArg (string escape -- (commandline -ct))
|
|
|
|
__%[1]s_debug "args: $args"
|
|
__%[1]s_debug "last arg: $lastArg"
|
|
|
|
set -l requestComp "$args[1] %[3]s $args[2..-1] $lastArg"
|
|
|
|
__%[1]s_debug "Calling $requestComp"
|
|
set -l results (eval $requestComp 2> /dev/null)
|
|
|
|
# Some programs may output extra empty lines after the directive.
|
|
# Let's ignore them or else it will break completion.
|
|
# Ref: https://github.com/spf13/cobra/issues/1279
|
|
for line in $results[-1..1]
|
|
if test (string trim -- $line) = ""
|
|
# Found an empty line, remove it
|
|
set results $results[1..-2]
|
|
else
|
|
# Found non-empty line, we have our proper output
|
|
break
|
|
end
|
|
end
|
|
|
|
set -l comps $results[1..-2]
|
|
set -l directiveLine $results[-1]
|
|
|
|
# For Fish, when completing a flag with an = (e.g., <program> -n=<TAB>)
|
|
# completions must be prefixed with the flag
|
|
set -l flagPrefix (string match -r -- '-.*=' "$lastArg")
|
|
|
|
__%[1]s_debug "Comps: $comps"
|
|
__%[1]s_debug "DirectiveLine: $directiveLine"
|
|
__%[1]s_debug "flagPrefix: $flagPrefix"
|
|
|
|
for comp in $comps
|
|
printf "%%s%%s\n" "$flagPrefix" "$comp"
|
|
end
|
|
|
|
printf "%%s\n" "$directiveLine"
|
|
end
|
|
|
|
# this function limits calls to __%[1]s_perform_completion, by caching the result behind $__%[1]s_perform_completion_once_result
|
|
function __%[1]s_perform_completion_once
|
|
__%[1]s_debug "Starting __%[1]s_perform_completion_once"
|
|
|
|
if test -n "$__%[1]s_perform_completion_once_result"
|
|
__%[1]s_debug "Seems like a valid result already exists, skipping __%[1]s_perform_completion"
|
|
return 0
|
|
end
|
|
|
|
set --global __%[1]s_perform_completion_once_result (__%[1]s_perform_completion)
|
|
if test -z "$__%[1]s_perform_completion_once_result"
|
|
__%[1]s_debug "No completions, probably due to a failure"
|
|
return 1
|
|
end
|
|
|
|
__%[1]s_debug "Performed completions and set __%[1]s_perform_completion_once_result"
|
|
return 0
|
|
end
|
|
|
|
# this function is used to clear the $__%[1]s_perform_completion_once_result variable after completions are run
|
|
function __%[1]s_clear_perform_completion_once_result
|
|
__%[1]s_debug ""
|
|
__%[1]s_debug "========= clearing previously set __%[1]s_perform_completion_once_result variable =========="
|
|
set --erase __%[1]s_perform_completion_once_result
|
|
__%[1]s_debug "Successfully erased the variable __%[1]s_perform_completion_once_result"
|
|
end
|
|
|
|
function __%[1]s_requires_order_preservation
|
|
__%[1]s_debug ""
|
|
__%[1]s_debug "========= checking if order preservation is required =========="
|
|
|
|
__%[1]s_perform_completion_once
|
|
if test -z "$__%[1]s_perform_completion_once_result"
|
|
__%[1]s_debug "Error determining if order preservation is required"
|
|
return 1
|
|
end
|
|
|
|
set -l directive (string sub --start 2 $__%[1]s_perform_completion_once_result[-1])
|
|
__%[1]s_debug "Directive is: $directive"
|
|
|
|
set -l shellCompDirectiveKeepOrder %[9]d
|
|
set -l keeporder (math (math --scale 0 $directive / $shellCompDirectiveKeepOrder) %% 2)
|
|
__%[1]s_debug "Keeporder is: $keeporder"
|
|
|
|
if test $keeporder -ne 0
|
|
__%[1]s_debug "This does require order preservation"
|
|
return 0
|
|
end
|
|
|
|
__%[1]s_debug "This doesn't require order preservation"
|
|
return 1
|
|
end
|
|
|
|
|
|
# This function does two things:
|
|
# - Obtain the completions and store them in the global __%[1]s_comp_results
|
|
# - Return false if file completion should be performed
|
|
function __%[1]s_prepare_completions
|
|
__%[1]s_debug ""
|
|
__%[1]s_debug "========= starting completion logic =========="
|
|
|
|
# Start fresh
|
|
set --erase __%[1]s_comp_results
|
|
|
|
__%[1]s_perform_completion_once
|
|
__%[1]s_debug "Completion results: $__%[1]s_perform_completion_once_result"
|
|
|
|
if test -z "$__%[1]s_perform_completion_once_result"
|
|
__%[1]s_debug "No completion, probably due to a failure"
|
|
# Might as well do file completion, in case it helps
|
|
return 1
|
|
end
|
|
|
|
set -l directive (string sub --start 2 $__%[1]s_perform_completion_once_result[-1])
|
|
set --global __%[1]s_comp_results $__%[1]s_perform_completion_once_result[1..-2]
|
|
|
|
__%[1]s_debug "Completions are: $__%[1]s_comp_results"
|
|
__%[1]s_debug "Directive is: $directive"
|
|
|
|
set -l shellCompDirectiveError %[4]d
|
|
set -l shellCompDirectiveNoSpace %[5]d
|
|
set -l shellCompDirectiveNoFileComp %[6]d
|
|
set -l shellCompDirectiveFilterFileExt %[7]d
|
|
set -l shellCompDirectiveFilterDirs %[8]d
|
|
|
|
if test -z "$directive"
|
|
set directive 0
|
|
end
|
|
|
|
set -l compErr (math (math --scale 0 $directive / $shellCompDirectiveError) %% 2)
|
|
if test $compErr -eq 1
|
|
__%[1]s_debug "Received error directive: aborting."
|
|
# Might as well do file completion, in case it helps
|
|
return 1
|
|
end
|
|
|
|
set -l filefilter (math (math --scale 0 $directive / $shellCompDirectiveFilterFileExt) %% 2)
|
|
set -l dirfilter (math (math --scale 0 $directive / $shellCompDirectiveFilterDirs) %% 2)
|
|
if test $filefilter -eq 1; or test $dirfilter -eq 1
|
|
__%[1]s_debug "File extension filtering or directory filtering not supported"
|
|
# Do full file completion instead
|
|
return 1
|
|
end
|
|
|
|
set -l nospace (math (math --scale 0 $directive / $shellCompDirectiveNoSpace) %% 2)
|
|
set -l nofiles (math (math --scale 0 $directive / $shellCompDirectiveNoFileComp) %% 2)
|
|
|
|
__%[1]s_debug "nospace: $nospace, nofiles: $nofiles"
|
|
|
|
# If we want to prevent a space, or if file completion is NOT disabled,
|
|
# we need to count the number of valid completions.
|
|
# To do so, we will filter on prefix as the completions we have received
|
|
# may not already be filtered so as to allow fish to match on different
|
|
# criteria than the prefix.
|
|
if test $nospace -ne 0; or test $nofiles -eq 0
|
|
set -l prefix (commandline -t | string escape --style=regex)
|
|
__%[1]s_debug "prefix: $prefix"
|
|
|
|
set -l completions (string match -r -- "^$prefix.*" $__%[1]s_comp_results)
|
|
set --global __%[1]s_comp_results $completions
|
|
__%[1]s_debug "Filtered completions are: $__%[1]s_comp_results"
|
|
|
|
# Important not to quote the variable for count to work
|
|
set -l numComps (count $__%[1]s_comp_results)
|
|
__%[1]s_debug "numComps: $numComps"
|
|
|
|
if test $numComps -eq 1; and test $nospace -ne 0
|
|
# We must first split on \t to get rid of the descriptions to be
|
|
# able to check what the actual completion will be.
|
|
# We don't need descriptions anyway since there is only a single
|
|
# real completion which the shell will expand immediately.
|
|
set -l split (string split --max 1 \t $__%[1]s_comp_results[1])
|
|
|
|
# Fish won't add a space if the completion ends with any
|
|
# of the following characters: @=/:.,
|
|
set -l lastChar (string sub -s -1 -- $split)
|
|
if not string match -r -q "[@=/:.,]" -- "$lastChar"
|
|
# In other cases, to support the "nospace" directive we trick the shell
|
|
# by outputting an extra, longer completion.
|
|
__%[1]s_debug "Adding second completion to perform nospace directive"
|
|
set --global __%[1]s_comp_results $split[1] $split[1].
|
|
__%[1]s_debug "Completions are now: $__%[1]s_comp_results"
|
|
end
|
|
end
|
|
|
|
if test $numComps -eq 0; and test $nofiles -eq 0
|
|
# To be consistent with bash and zsh, we only trigger file
|
|
# completion when there are no other completions
|
|
__%[1]s_debug "Requesting file completion"
|
|
return 1
|
|
end
|
|
end
|
|
|
|
return 0
|
|
end
|
|
|
|
# Since Fish completions are only loaded once the user triggers them, we trigger them ourselves
|
|
# so we can properly delete any completions provided by another script.
|
|
# Only do this if the program can be found, or else fish may print some errors; besides,
|
|
# the existing completions will only be loaded if the program can be found.
|
|
if type -q "%[2]s"
|
|
# The space after the program name is essential to trigger completion for the program
|
|
# and not completion of the program name itself.
|
|
# Also, we use '> /dev/null 2>&1' since '&>' is not supported in older versions of fish.
|
|
complete --do-complete "%[2]s " > /dev/null 2>&1
|
|
end
|
|
|
|
# Remove any pre-existing completions for the program since we will be handling all of them.
|
|
complete -c %[2]s -e
|
|
|
|
# this will get called after the two calls below and clear the $__%[1]s_perform_completion_once_result global
|
|
complete -c %[2]s -n '__%[1]s_clear_perform_completion_once_result'
|
|
# The call to __%[1]s_prepare_completions will setup __%[1]s_comp_results
|
|
# which provides the program's completion choices.
|
|
# If this doesn't require order preservation, we don't use the -k flag
|
|
complete -c %[2]s -n 'not __%[1]s_requires_order_preservation && __%[1]s_prepare_completions' -f -a '$__%[1]s_comp_results'
|
|
# otherwise we use the -k flag
|
|
complete -k -c %[2]s -n '__%[1]s_requires_order_preservation && __%[1]s_prepare_completions' -f -a '$__%[1]s_comp_results'
|