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#compdef uniq guniq
local args
args=(
'(-c --count)'{-c,--count}'[prefix lines by the number of occurrences]'
'(-d --repeated)'{-d,--repeated}'[only print duplicate lines]'
'(--all-repeated)-D-[print all duplicate lines]'
'(-D)--all-repeated=-[print all duplicate lines]::delimit method [none]:(none prepend separate)'
'(-f --skip-fields)'{-f,--skip-fields=}'[avoid comparing initial fields]:number of fields'
'--group=-[show all items]::group separation [separate]:(separate prepend append both)'
'(-i --ignore-case)'{-i,--ignore-case}'[ignore differences in case when comparing]'
'(-s --skip-chars)'{-s,--skip-chars=}'[avoid comparing initial characters]:number of characters'
'(-t --separator)'{-t,--separator=}'[specify field delimiter]:separator'
'(-u --unique)'{-u,--unique}'[only print unique lines]'
'(-w --check-chars)'{-w,--check-chars=}'[specify maximum number of characters to compare]:characters'
'(-W --check-fields)'{-W,--check-fields=}'[specify maximum number of fields to compare]:fields'
'(-z --zero-terminated)'{-z,--zero-terminated}'[delimit lines with null character, not newline]'
'(- *)--help[display help information]'
'(- *)--version[display version information]'
)
if ! _pick_variant gnu=Free\ Soft unix --version; then
local optchars="cdufs"
if [[ "$OSTYPE" == (darwin|dragonfly|freebsd|openbsd)* ]]; then
optchars+=i
fi
[[ $OSTYPE = freebsd* ]] && optchars+=D
args=( ${(M)args:#(|\*)(|\(*\))-[$optchars]*} )
fi
_arguments "$args[@]" \
'1::input file:_files' \
'2::output file:_files'
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