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#!/usr/bin/env bash
case "$(basename "$SHELL")" in
bash | zsh | sh)
# Keep the current shell
;;
*)
# In case the system uses a non-POSIX shell, like fish or nushell,
# we want to ensure run also our forked processes in a bash environment.
SHELL="bash"
;;
esac
# === Change keybinds or add more here ===
declare -a INDEXES=(
"nixpkgs ctrl-n"
"home-manager ctrl-h"
# you can add any indexes combination here,
# like `nixpkgs,nixos`
"all ctrl-a"
)
SEARCH_SNIPPET_KEY="ctrl-w"
OPEN_SOURCE_KEY="ctrl-s"
OPEN_HOMEPAGE_KEY="ctrl-o"
NIX_SHELL_KEY="ctrl-i"
PRINT_PREVIEW_KEY="ctrl-p"
OPENER="xdg-open"
if [[ "$(uname)" == 'Darwin' ]]; then
SEARCH_SNIPPET_KEY="alt-w"
OPEN_SOURCE_KEY="alt-s"
OPEN_HOMEPAGE_KEY="alt-o"
NIX_SHELL_KEY="alt-i"
PRINT_PREVIEW_KEY="alt-p"
OPENER="open"
fi
# ========================================
# for debug / development
CMD="${NIX_SEARCH_TV:-nix-search-tv}"
# bind_index binds the given $key to the given $index
bind_index() {
local key="$1"
local index="$2"
local prompt=""
local indexes_flag=""
if [[ -n "$index" && "$index" != "all" ]]; then
indexes_flag="--indexes $index"
prompt=$index
fi
local preview="$CMD preview $indexes_flag"
local print="$CMD print $indexes_flag"
echo "$key:change-prompt($prompt> )+change-preview($preview {})+reload($print)"
}
STATE_FILE="/tmp/nix-search-tv-fzf"
# save_state saves the currently displayed index
# to the $STATE_FILE. This file serves as an external script state
# for communication between "print" and "preview" commands
save_state() {
local index="$1"
local indexes_flag=""
if [[ -n "$index" && "$index" != "all" ]]; then
indexes_flag="--indexes $index"
fi
echo "execute(echo $indexes_flag > $STATE_FILE)"
}
HEADER="$OPEN_HOMEPAGE_KEY - open homepage
$OPEN_SOURCE_KEY - open source
$SEARCH_SNIPPET_KEY - search github for snippets
$NIX_SHELL_KEY - nix-shell
$PRINT_PREVIEW_KEY - print preview
"
FZF_BINDS=""
for e in "${INDEXES[@]}"; do
index=$(echo "$e" | awk '{ print $1 }')
keybind=$(echo "$e" | awk '{ print $2 }')
fzf_bind=$(bind_index "$keybind" "$index")
fzf_save_state=$(save_state "$index")
FZF_BINDS="$FZF_BINDS --bind '$fzf_bind+$fzf_save_state'"
newline=$'\n'
HEADER="$HEADER$keybind - $index$newline"
done
# reset the state
echo "" >/tmp/nix-search-tv-fzf
SEARCH_SNIPPET_CMD=$'echo "{}"'
# fzf surrounds the matched package with ', trim them
SEARCH_SNIPPET_CMD="$SEARCH_SNIPPET_CMD | tr -d \"\'\" "
# if it's multi-index search, then we need to remote the prefix
SEARCH_SNIPPET_CMD="$SEARCH_SNIPPET_CMD | awk \'{ if (\$2) { print \$2 } else print \$1 }\' "
SEARCH_SNIPPET_CMD="$SEARCH_SNIPPET_CMD | xargs printf \"https://github.com/search?type=code&q=lang:nix+%s\" \$1 "
# shellcheck disable=SC2016
NIX_SHELL_CMD='nix-shell --run $SHELL -p $(echo "{}" | sed "s:nixpkgs/::g"'
NIX_SHELL_CMD="$NIX_SHELL_CMD | tr -d \"\'\")"
# shellcheck disable=SC2016
PREVIEW_WINDOW='
if [[ ${FZF_COLS:-$COLUMNS} -lt 130 ]]; then
echo "+change-preview-window(wrap,up)"
else
echo "+change-preview-window(wrap)"
fi
'
eval "$CMD print | fzf \
--preview '$CMD preview \$(cat $STATE_FILE) {}' \
--bind '$OPEN_SOURCE_KEY:execute($CMD source \$(cat $STATE_FILE) {} | xargs $OPENER)' \
--bind '$OPEN_HOMEPAGE_KEY:execute($CMD homepage \$(cat $STATE_FILE) {} | xargs $OPENER)' \
--bind $'$SEARCH_SNIPPET_KEY:execute($SEARCH_SNIPPET_CMD | xargs $OPENER)' \
--bind $'$NIX_SHELL_KEY:become($NIX_SHELL_CMD)' \
--bind $'$PRINT_PREVIEW_KEY:execute($CMD preview \$(cat $STATE_FILE) {} | less)' \
--layout reverse \
--scheme history \
--bind 'resize,start:transform:$PREVIEW_WINDOW' \
--header '$HEADER' \
--header-first \
--header-border \
--header-label \"Help\" \
$FZF_BINDS
"
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