spf13--cobra/zsh_completions.go

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2023-03-06 02:28:31 +00:00
// Copyright 2013-2023 The Cobra Authors
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//
// 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.
package cobra
import (
"bytes"
"fmt"
"io"
"os"
)
// GenZshCompletionFile generates zsh completion file including descriptions.
func (c *Command) GenZshCompletionFile(filename string) error {
return c.genZshCompletionFile(filename, true)
}
// GenZshCompletion generates zsh completion file including descriptions
// and writes it to the passed writer.
func (c *Command) GenZshCompletion(w io.Writer) error {
return c.genZshCompletion(w, true)
}
// GenZshCompletionFileNoDesc generates zsh completion file without descriptions.
func (c *Command) GenZshCompletionFileNoDesc(filename string) error {
return c.genZshCompletionFile(filename, false)
}
// GenZshCompletionNoDesc generates zsh completion file without descriptions
// and writes it to the passed writer.
func (c *Command) GenZshCompletionNoDesc(w io.Writer) error {
return c.genZshCompletion(w, false)
}
// MarkZshCompPositionalArgumentFile only worked for zsh and its behavior was
// not consistent with Bash completion. It has therefore been disabled.
// Instead, when no other completion is specified, file completion is done by
// default for every argument. One can disable file completion on a per-argument
// basis by using ValidArgsFunction and ShellCompDirectiveNoFileComp.
// To achieve file extension filtering, one can use ValidArgsFunction and
// ShellCompDirectiveFilterFileExt.
//
// Deprecated
func (c *Command) MarkZshCompPositionalArgumentFile(argPosition int, patterns ...string) error {
return nil
}
// MarkZshCompPositionalArgumentWords only worked for zsh. It has therefore
// been disabled.
// To achieve the same behavior across all shells, one can use
// ValidArgs (for the first argument only) or ValidArgsFunction for
// any argument (can include the first one also).
//
// Deprecated
func (c *Command) MarkZshCompPositionalArgumentWords(argPosition int, words ...string) error {
return nil
}
func (c *Command) genZshCompletionFile(filename string, includeDesc bool) error {
outFile, err := os.Create(filename)
if err != nil {
return err
}
defer outFile.Close()
return c.genZshCompletion(outFile, includeDesc)
}
func (c *Command) genZshCompletion(w io.Writer, includeDesc bool) error {
buf := new(bytes.Buffer)
genZshComp(buf, c.Name(), includeDesc)
_, err := buf.WriteTo(w)
return err
}
func genZshComp(buf io.StringWriter, name string, includeDesc bool) {
compCmd := ShellCompRequestCmd
if !includeDesc {
compCmd = ShellCompNoDescRequestCmd
}
WriteStringAndCheck(buf, fmt.Sprintf(`#compdef %[1]s
# zsh completion for %-36[1]s -*- shell-script -*-
__%[1]s_debug()
{
local file="$BASH_COMP_DEBUG_FILE"
if [[ -n ${file} ]]; then
echo "$*" >> "${file}"
fi
}
_%[1]s()
{
local shellCompDirectiveError=%[3]d
local shellCompDirectiveNoSpace=%[4]d
local shellCompDirectiveNoFileComp=%[5]d
local shellCompDirectiveFilterFileExt=%[6]d
local shellCompDirectiveFilterDirs=%[7]d
local shellCompDirectiveKeepOrder=%[8]d
local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace keepOrder
local -a completions
__%[1]s_debug "\n========= starting completion logic =========="
__%[1]s_debug "CURRENT: ${CURRENT}, words[*]: ${words[*]}"
# The user could have moved the cursor backwards on the command-line.
# We need to trigger completion from the $CURRENT location, so we need
# to truncate the command-line ($words) up to the $CURRENT location.
# (We cannot use $CURSOR as its value does not work when a command is an alias.)
words=("${=words[1,CURRENT]}")
__%[1]s_debug "Truncated words[*]: ${words[*]},"
lastParam=${words[-1]}
lastChar=${lastParam[-1]}
__%[1]s_debug "lastParam: ${lastParam}, lastChar: ${lastChar}"
# For zsh, when completing a flag with an = (e.g., %[1]s -n=<TAB>)
# completions must be prefixed with the flag
setopt local_options BASH_REMATCH
if [[ "${lastParam}" =~ '-.*=' ]]; then
# We are dealing with a flag with an =
flagPrefix="-P ${BASH_REMATCH}"
fi
# Prepare the command to obtain completions
requestComp="${words[1]} %[2]s ${words[2,-1]}"
if [ "${lastChar}" = "" ]; then
# If the last parameter is complete (there is a space following it)
# We add an extra empty parameter so we can indicate this to the go completion code.
__%[1]s_debug "Adding extra empty parameter"
requestComp="${requestComp} \"\""
fi
__%[1]s_debug "About to call: eval ${requestComp}"
# Use eval to handle any environment variables and such
out=$(eval ${requestComp} 2>/dev/null)
__%[1]s_debug "completion output: ${out}"
# Extract the directive integer following a : from the last line
local lastLine
while IFS='\n' read -r line; do
lastLine=${line}
done < <(printf "%%s\n" "${out[@]}")
__%[1]s_debug "last line: ${lastLine}"
if [ "${lastLine[1]}" = : ]; then
directive=${lastLine[2,-1]}
# Remove the directive including the : and the newline
local suffix
(( suffix=${#lastLine}+2))
out=${out[1,-$suffix]}
else
# There is no directive specified. Leave $out as is.
__%[1]s_debug "No directive found. Setting do default"
directive=0
fi
__%[1]s_debug "directive: ${directive}"
__%[1]s_debug "completions: ${out}"
__%[1]s_debug "flagPrefix: ${flagPrefix}"
if [ $((directive & shellCompDirectiveError)) -ne 0 ]; then
__%[1]s_debug "Completion received error. Ignoring completions."
return
fi
local activeHelpMarker="%[9]s"
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local endIndex=${#activeHelpMarker}
local startIndex=$((${#activeHelpMarker}+1))
local hasActiveHelp=0
while IFS='\n' read -r comp; do
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# Check if this is an activeHelp statement (i.e., prefixed with $activeHelpMarker)
if [ "${comp[1,$endIndex]}" = "$activeHelpMarker" ];then
__%[1]s_debug "ActiveHelp found: $comp"
comp="${comp[$startIndex,-1]}"
if [ -n "$comp" ]; then
compadd -x "${comp}"
__%[1]s_debug "ActiveHelp will need delimiter"
hasActiveHelp=1
fi
continue
fi
if [ -n "$comp" ]; then
# If requested, completions are returned with a description.
# The description is preceded by a TAB character.
# For zsh's _describe, we need to use a : instead of a TAB.
# We first need to escape any : as part of the completion itself.
comp=${comp//:/\\:}
local tab="$(printf '\t')"
comp=${comp//$tab/:}
__%[1]s_debug "Adding completion: ${comp}"
completions+=${comp}
lastComp=$comp
fi
done < <(printf "%%s\n" "${out[@]}")
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# Add a delimiter after the activeHelp statements, but only if:
# - there are completions following the activeHelp statements, or
# - file completion will be performed (so there will be choices after the activeHelp)
if [ $hasActiveHelp -eq 1 ]; then
if [ ${#completions} -ne 0 ] || [ $((directive & shellCompDirectiveNoFileComp)) -eq 0 ]; then
__%[1]s_debug "Adding activeHelp delimiter"
compadd -x "--"
hasActiveHelp=0
fi
fi
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
if [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ]; then
__%[1]s_debug "Activating nospace."
noSpace="-S ''"
fi
if [ $((directive & shellCompDirectiveKeepOrder)) -ne 0 ]; then
__%[1]s_debug "Activating keep order."
keepOrder="-V"
fi
if [ $((directive & shellCompDirectiveFilterFileExt)) -ne 0 ]; then
# File extension filtering
local filteringCmd
filteringCmd='_files'
for filter in ${completions[@]}; do
if [ ${filter[1]} != '*' ]; then
# zsh requires a glob pattern to do file filtering
filter="\*.$filter"
fi
filteringCmd+=" -g $filter"
done
filteringCmd+=" ${flagPrefix}"
__%[1]s_debug "File filtering command: $filteringCmd"
_arguments '*:filename:'"$filteringCmd"
elif [ $((directive & shellCompDirectiveFilterDirs)) -ne 0 ]; then
# File completion for directories only
local subdir
subdir="${completions[1]}"
if [ -n "$subdir" ]; then
__%[1]s_debug "Listing directories in $subdir"
pushd "${subdir}" >/dev/null 2>&1
else
__%[1]s_debug "Listing directories in ."
fi
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
local result
_arguments '*:dirname:_files -/'" ${flagPrefix}"
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
result=$?
if [ -n "$subdir" ]; then
popd >/dev/null 2>&1
fi
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
return $result
else
__%[1]s_debug "Calling _describe"
if eval _describe $keepOrder "completions" completions $flagPrefix $noSpace; then
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
__%[1]s_debug "_describe found some completions"
# Return the success of having called _describe
return 0
else
Fix zsh for DirectiveNoSpace and DirectiveNoFileComp (#1213) Fixes #1211 When handling ShellCompDirectiveNoSpace we must still properly handle descriptions. To do so we cannot simply use 'compadd', but must use zsh's '_describe' function. Also, when handling ShellCompDirectiveNoSpace we cannot assume that only a single completion will be given to the script. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix. Therefore, we cannot use the number of completions received in the completion script to determine if we should activate the "no space" directive. Instead, we can leave it all to the '_describe' function. Fixes #1212 When handling ShellCompDirectiveNoFileComp we cannot base ourself on the script receiving no valid completion. In fact, ValidArgsFunction can return multiple completions, even if they don't match the 'toComplete' argument prefix at all. Therefore, we cannot use the number of completions received by the completion script to determine if we should activate the "no file comp" directive. Instead, we can check if the '_describe' function has found any completions. Finally, it is important for the script to return the return code of the called zsh functions (_describe, _arguments). This tells zsh if completions were found or not, which if not, will trigger different matching attempts, such as matching what the user typed with the the content of possible completions (instead of just as the prefix). Signed-off-by: Marc Khouzam <marc.khouzam@montreal.ca>
2021-05-03 16:54:00 +00:00
__%[1]s_debug "_describe did not find completions."
__%[1]s_debug "Checking if we should do file completion."
if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then
__%[1]s_debug "deactivating file completion"
# We must return an error code here to let zsh know that there were no
# completions found by _describe; this is what will trigger other
# matching algorithms to attempt to find completions.
# For example zsh can match letters in the middle of words.
return 1
else
# Perform file completion
__%[1]s_debug "Activating file completion"
# We must return the result of this command, so it must be the
# last command, or else we must store its result to return it.
_arguments '*:filename:_files'" ${flagPrefix}"
fi
fi
fi
}
# don't run the completion function when being source-ed or eval-ed
if [ "$funcstack[1]" = "_%[1]s" ]; then
_%[1]s
fi
`, name, compCmd,
ShellCompDirectiveError, ShellCompDirectiveNoSpace, ShellCompDirectiveNoFileComp,
ShellCompDirectiveFilterFileExt, ShellCompDirectiveFilterDirs, ShellCompDirectiveKeepOrder,
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activeHelpMarker))
}