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#compdef join gjoin
local args variant
args=(
'*-a+[print unpairable lines from specified file]:file number:(1 2)'
'-e+[replace missing input fields with specified string]:replacement string'
"(-1 -2)-j+[join on specified field for both files]:field number"
'-o+[use specified output format]:format string'
'-t+[use specified character as field separator]:separator'
'*-v+[like -a, but suppress joined output lines]:file number:(1 2)'
'(-j -1 -j1)'{-j1,-1+}'[join on specified field of first file]:field number'
'(-j -2 -j2)'{-j2,-2+}'[join on specified field of second file]:field number'
'1:file:_files' '2:file:_files'
)
_pick_variant -r variant gnu=GNU $OSTYPE --version
case $variant in
gnu)
args+=(
'(-i --ignore-case)'{-i,--ignore-case}'[ignore differences in case when comparing fields]'
'(-)--help[display help information]'
'(-)--version[output version information]'
'(--check-order --nocheck-order)'{--check-order,--nocheck-order}
'--header[treat first line in each file as field headers]'
'(-z --zero-terminated)'{-z,--zero-terminated}'[end lines with 0 byte, not newline]'
)
;;
esac
_arguments -s $args
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