zsh/.config/zsh/completion/_tdfgo
#compdef tdfgo
# zsh completion for tdfgo -*- shell-script -*-
__tdfgo_debug()
{
local file="$BASH_COMP_DEBUG_FILE"
if [[ -n ${file} ]]; then
echo "$*" >> "${file}"
fi
}
_tdfgo()
{
local shellCompDirectiveError=1
local shellCompDirectiveNoSpace=2
local shellCompDirectiveNoFileComp=4
local shellCompDirectiveFilterFileExt=8
local shellCompDirectiveFilterDirs=16
local lastParam lastChar flagPrefix requestComp out directive comp lastComp noSpace
local -a completions
__tdfgo_debug "\n========= starting completion logic =========="
__tdfgo_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]}")
__tdfgo_debug "Truncated words[*]: ${words[*]},"
lastParam=${words[-1]}
lastChar=${lastParam[-1]}
__tdfgo_debug "lastParam: ${lastParam}, lastChar: ${lastChar}"
# For zsh, when completing a flag with an = (e.g., tdfgo -n=<TAB>)
# completions must be prefixed with the flag
setopt local_options BASH_REMATCH
if [[ "${lastParam}" =~ '-.*=' ]]; then
# We are dealing with a flag with an =
flagPrefix="-P ${BASH_REMATCH}"
fi
# Prepare the command to obtain completions
requestComp="${words[1]} __complete ${words[2,-1]}"
if [ "${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.
__tdfgo_debug "Adding extra empty parameter"
requestComp="${requestComp} \"\""
fi
__tdfgo_debug "About to call: eval ${requestComp}"
# Use eval to handle any environment variables and such
out=$(eval ${requestComp} 2>/dev/null)
__tdfgo_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[@]}")
__tdfgo_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.
__tdfgo_debug "No directive found. Setting do default"
directive=0
fi
__tdfgo_debug "directive: ${directive}"
__tdfgo_debug "completions: ${out}"
__tdfgo_debug "flagPrefix: ${flagPrefix}"
if [ $((directive & shellCompDirectiveError)) -ne 0 ]; then
__tdfgo_debug "Completion received error. Ignoring completions."
return
fi
local activeHelpMarker="_activeHelp_ "
local endIndex=${#activeHelpMarker}
local startIndex=$((${#activeHelpMarker}+1))
local hasActiveHelp=0
while IFS='\n' read -r comp; do
# Check if this is an activeHelp statement (i.e., prefixed with $activeHelpMarker)
if [ "${comp[1,$endIndex]}" = "$activeHelpMarker" ];then
__tdfgo_debug "ActiveHelp found: $comp"
comp="${comp[$startIndex,-1]}"
if [ -n "$comp" ]; then
compadd -x "${comp}"
__tdfgo_debug "ActiveHelp will need delimiter"
hasActiveHelp=1
fi
continue
fi
if [ -n "$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/:}
__tdfgo_debug "Adding completion: ${comp}"
completions+=${comp}
lastComp=$comp
fi
done < <(printf "%s\n" "${out[@]}")
# 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
__tdfgo_debug "Adding activeHelp delimiter"
compadd -x "--"
hasActiveHelp=0
fi
fi
if [ $((directive & shellCompDirectiveNoSpace)) -ne 0 ]; then
__tdfgo_debug "Activating nospace."
noSpace="-S ''"
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}"
__tdfgo_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
__tdfgo_debug "Listing directories in $subdir"
pushd "${subdir}" >/dev/null 2>&1
else
__tdfgo_debug "Listing directories in ."
fi
local result
_arguments '*:dirname:_files -/'" ${flagPrefix}"
result=$?
if [ -n "$subdir" ]; then
popd >/dev/null 2>&1
fi
return $result
else
__tdfgo_debug "Calling _describe"
if eval _describe "completions" completions $flagPrefix $noSpace; then
__tdfgo_debug "_describe found some completions"
# Return the success of having called _describe
return 0
else
__tdfgo_debug "_describe did not find completions."
__tdfgo_debug "Checking if we should do file completion."
if [ $((directive & shellCompDirectiveNoFileComp)) -ne 0 ]; then
__tdfgo_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
__tdfgo_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]" = "_tdfgo" ]; then
_tdfgo
fi
