add dep-drill script

bin/dep-drill.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -I nixpkgs=flake:nixpkgs -p bkt -p fzf -p moreutils -p ncdu -i bash
+set -euo pipefail
+
+# todo's:
+# - preserve(track) selection when hitting ctrl-s
+#     https://github.com/junegunn/fzf/issues/3460
+# - truncate nix store paths to fit terminal width
+#     awk?
+# - prevent hitting left-arrow on an empty stack
+
+STATE=$(mktemp -d --suffix .nixfzf)
+function cleanup {
+    rm -rf "$STATE"
+}
+trap cleanup EXIT
+
+if [ $# -ne 1 ]; then
+  echo "Usage: dep-drill.sh /nix/store/..."
+  exit 1
+fi
+
+
+# 3: sort -hk3 - sort by closure size, 2: sort -hk2 - own size
+echo 3 > "$STATE"/sort
+echo "$1" > "$STATE"/path
+export SHELL=bash
+export BKT_CACHE_DIR="$STATE/cache"
+export BKT_TTL=10m
+export FZF_DEFAULT_COMMAND='bkt -- nix path-info -rSsh $(tail -1 '"$STATE/path"') | sort -hk$(cat '"$STATE/sort"') | cut -c12-'
+
+/nix/store/w1g37hv5k1h77wlxraq6ci0dbbcxhiir-fzf-0.42.0/bin/fzf --no-sort \
+    --layout=reverse-list \
+    --bind=load:last \
+    --track \
+    --preview 'bkt -- nix why-depends $(tail -1 '"$STATE/path"') /nix/store/{1} --precise --all' \
+    --preview-window=down,30%,border-top \
+    --preview-label=why-depends \
+    --info=inline \
+    --nth=1 \
+    --bind 'ctrl-s:execute-silent(sed -i "s/2/4/g; s/3/2/g; s/4/3/g" '"$STATE/sort"')+track+reload-sync<'"$FZF_DEFAULT_COMMAND"'>+transform-border-label(sed -n "s/2/sorted by own size/p; s/3/sorted by closure size/p" '"$STATE/sort"')' \
+    --bind 'ctrl-n:execute:ncdu /nix/store/{1}' \
+    --bind 'right:execute-silent(echo /nix/store/{1} >> '"$STATE/path"')+reload-sync<'"$FZF_DEFAULT_COMMAND"'>+clear-query' \
+    --bind 'left:execute-silent(uniq '"$STATE/path"' | head -n-1 | sponge '"$STATE/path"')+reload-sync<'"$FZF_DEFAULT_COMMAND"'>+clear-query' \
+    --border-label="sorted by closure size" \
+    --border=top \
+    --header="ctrl-s: toggle sort, ctrl-n: ncdu"