lessfilter

#!/usr/bin/env bash
has_cmd() {
	for opt in "$@"; do
		if command -v "$opt" >/dev/null; then
			continue
		else
			return $?
		fi
	done
}

mime=$(file -Lbs --mime-type "$1")
case "$mime" in
# https://github.com/wofr06/lesspipe/pull/107
inode/directory)
	if has_cmd eza; then
		eza -hl --git --color=always --icons=always "$1"
	elif has_cmd exa; then
		exa -hl --color=always --icons "$1"
	else
		exit 1
	fi
	;;
# https://github.com/wofr06/lesspipe/pull/117
text/* | application/javascript | inode/x-empty)
	if has_cmd bat; then
		bat --color=always "$1"
	elif has_cmd pygmentize; then
		pygmentize "$1" | less
	else
		exit 1
	fi
	;;
# https://github.com/wofr06/lesspipe/pull/115
application/rfc822)
	if has_cmd bat; then
		bat --color=always -lEmail "$1"
	else
		exit 1
	fi
	;;
# https://github.com/wofr06/lesspipe/pull/110
application/pdf)
	if has_cmd pdftotext sed; then
		pdftotext -q "$1" - | sed "s/\f/$(hr ─)\n/g"
	else
		exit 1
	fi
	;;
application/json)
	if has_cmd jupyter bat && [[ "$1" == *.ipynb ]]; then
		jupyter nbconvert --to python --stdout "$1" | bat --color=always -plpython
	elif has_cmd jq; then
		jq -Cr . "$1"
	else
		exit 1
	fi
	;;
# https://github.com/wofr06/lesspipe/pull/106
image/*)
	if has_cmd chafa; then
		chafa -f symbols "$1"
	fi
	if has_cmd exiftool; then
		exiftool "$1" | bat --color=always -plyaml
	else
		exit 1
	fi
	;;
application/vnd.sqlite3)
	if has_cmd yes sqlite3 bat; then
		yes .q | sqlite3 "$1" | bat --color=always -plsql
	else
		exit 1
	fi
	;;
application/zip)
	if has_cmd python && [[ "$1" == *.pth ]]; then
		python <<EOF
import torch

data = torch.load("$1")
if isinstance(data, torch.Tensor):
    print(data.shape)
print(data)
EOF
	else
		exit 1
	fi
	;;
application/octet-stream)
	if has_cmd python && [[ "$1" == *data.mdb ]]; then
		python <<EOF
from os.path import dirname as dirn
import lmdb

with lmdb.open(dirn("$1")) as env, env.begin() as txn:
    for key, val in txn.cursor():
        print(key.decode())
EOF
	elif has_cmd python && [[ "$1" == *events.out.tfevents.* ]]; then
		python <<EOF
from contextlib import suppress
import sys
from time import gmtime, strftime

import pandas as pd
import plotext as plt
from tensorboard.backend.event_processing.event_file_loader import (
    EventFileLoader,
)

file = "$1"
df = pd.DataFrame(columns=["Step", "Value"])
df.index.name = "YYYY-mm-dd HH:MM:SS"

for event in EventFileLoader(file).Load():
    with suppress(IndexError):
        df.loc[strftime("%F %H:%M:%S", gmtime(event.wall_time))] = [  # type: ignore
            event.step,  # type: ignore
            event.summary.value[0].tensor.float_val[0],  # type: ignore
        ]
df.index = pd.to_datetime(df.index)  # type: ignore
df.Step = df.Step.astype(int)
plt.plot(df.Step, df.Value, marker="braille")
plt.title(event.summary.value[0].metadata.display_name)  # type: ignore
plt.clc()
plt.show()
df.to_csv(sys.stdout, "\t")
EOF
	else
		exit 1
	fi
	;;
*)
	exit 1
	;;
esac