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-##
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-# Use fzf as fish completion widget.
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-#
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-#
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-# When FZF_COMPLETE variable is set, fzf is used as completion
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-# widget for the fish shell by binding the TAB key.
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-#
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-# FZF_COMPLETE can have some special numeric values:
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-#
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-# `set FZF_COMPLETE 0` basic widget accepts with TAB key
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-# `set FZF_COMPLETE 1` extends 0 with candidate preview window
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-# `set FZF_COMPLETE 2` same as 1 but TAB walks on candidates
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-# `set FZF_COMPLETE 3` multi TAB selection, RETURN accepts selected ones.
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-#
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-# Any other value of FZF_COMPLETE is given directly as options to fzf.
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-#
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-# If you prefer to set more advanced options, take a look at the
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-# `__fzf_complete_opts` function and override that in your environment.
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-
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-
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-# modified from https://github.com/junegunn/fzf/wiki/Examples-(fish)#completion
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-function __fzf_complete -d 'fzf completion and print selection back to commandline'
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- # As of 2.6, fish's "complete" function does not understand
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- # subcommands. Instead, we use the same hack as __fish_complete_subcommand and
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- # extract the subcommand manually.
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- set -l cmd (commandline -co) (commandline -ct)
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-
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- switch $cmd[1]
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- case env sudo
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- for i in (seq 2 (count $cmd))
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- switch $cmd[$i]
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- case '-*'
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- case '*=*'
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- case '*'
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- set cmd $cmd[$i..-1]
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- break
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- end
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- end
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- end
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-
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- set -l cmd_lastw $cmd[-1]
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- set cmd (string join -- ' ' $cmd)
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-
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- set -l initial_query ''
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- test -n "$cmd_lastw"; and set initial_query --query="$cmd_lastw"
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-
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- set -l complist (complete -C$cmd)
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- set -l result
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-
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- # do nothing if there is nothing to select from
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- test -z "$complist"; and return
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-
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- set -l compwc (echo $complist | wc -w)
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- if test $compwc -eq 1
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- # if there is only one option dont open fzf
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- set result "$complist"
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- else
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-
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- set -l query
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- string join -- \n $complist \
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- | sort \
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- | eval (__fzfcmd) $initial_query --print-query (__fzf_complete_opts) \
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- | cut -f1 \
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- | while read -l r
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- # first line is the user entered query
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- if test -z "$query"
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- set query $r
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- # rest of lines are selected candidates
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- else
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- set result $result $r
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- end
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- end
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-
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- # exit if user canceled
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- if test -z "$query" ;and test -z "$result"
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- return
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- end
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-
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- # if user accepted but no candidate matches, use the input as result
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- if test -z "$result"
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- set result $query
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- end
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- end
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-
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- set prefix (string sub -s 1 -l 1 -- (commandline -t))
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- for i in (seq (count $result))
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- set -l r $result[$i]
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- switch $prefix
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- case "'"
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- commandline -t -- (string escape -- $r)
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- case '"'
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- if string match '*"*' -- $r >/dev/null
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- commandline -t -- (string escape -- $r)
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- else
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- commandline -t -- '"'$r'"'
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- end
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- case '~'
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- commandline -t -- (string sub -s 2 (string escape -n -- $r))
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- case '*'
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- commandline -t -- (string escape -n -- $r)
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- end
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- [ $i -lt (count $result) ]; and commandline -i ' '
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- end
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-
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- commandline -f repaint
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-end
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-
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-function __fzf_complete_opts_common
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- echo --cycle --reverse --inline-info
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-end
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-
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-function __fzf_complete_opts_tab_accepts
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- echo --bind tab:accept,btab:cancel
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-end
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-
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-function __fzf_complete_opts_tab_walks
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- echo --bind tab:down,btab:up
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-end
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-
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-function __fzf_complete_opts_preview
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- set -l file (status -f)
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- echo --with-nth=1 --preview-window=right:wrap --preview="fish\ '$file'\ __fzf_complete_preview\ '{1}'\ '{2..}'"
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-end
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-
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-test "$argv[1]" = "__fzf_complete_preview"; and __fzf_complete_preview $argv[2..3]
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-
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-function __fzf_complete_opts_0 -d 'basic single selection with tab accept'
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- __fzf_complete_opts_common
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- echo --no-multi
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- __fzf_complete_opts_tab_accepts
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-end
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-
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-function __fzf_complete_opts_1 -d 'single selection with preview and tab accept'
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- __fzf_complete_opts_0
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- __fzf_complete_opts_preview
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-end
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-
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-function __fzf_complete_opts_2 -d 'single selection with preview and tab walks'
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- __fzf_complete_opts_1
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- __fzf_complete_opts_tab_walks
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-end
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-
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-function __fzf_complete_opts_3 -d 'multi selection with preview'
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- __fzf_complete_opts_common
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- echo --multi
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- __fzf_complete_opts_preview
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-end
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-
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-function __fzf_complete_opts -d 'fzf options for fish tab completion'
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- switch $FZF_COMPLETE
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- case 0
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- __fzf_complete_opts_0
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- case 1
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- __fzf_complete_opts_1
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- case 2
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- __fzf_complete_opts_2
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- case 3
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- __fzf_complete_opts_3
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- case '*'
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- echo $FZF_COMPLETE
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- end
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-end
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