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#!/bin/bash
###################################################################################################
# .drive-prepend-object-type-size
###################################################################################################
# Copyright 2017-2023 Jean-Christophe Manciot <jcmanciot@sdxlive.com>
#
# Licensed under a GPLv3 License; you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.gnu.org/licenses/gpl-3.0.md
#
# The licensor cannot revoke these freedoms as long as you follow the license terms.
#
# Attribution — You must give appropriate credit, provide a link to the license, and indicate if
# changes were made. You may do so in any reasonable manner, but not in any way that
# suggests the licensor endorses you or your use.
###################################################################################################
###################################################################################################
#
# Prepend a leading character symbolizing the object type followed by its size in B/KB/MB/TB before
# the local object name.
# The leading character may be:
# - d: directory
# - -: file
# - ?: unknown type
#
###################################################################################################
#
# Parameter:
# ---------
#
# - <object_name>: local file/folder name
#
###################################################################################################
#
# Returned value:
# --------------
#
# - <stated_object_name>: string formatted with "<object_type> <object_size> <object_name>" where
# <object_type> is one of the following:
# - d: directory
# - -: file
# - ?: unknown type
#
###################################################################################################
#
# Usage example:
# -------------
#
# stated_object_name=$(.drive-prepend-object-type-size "$object_name")
#
###################################################################################################
if [[ $LOG_DRIVE_PREPEND_OBJECT_TYPE_SIZE == ON ]]; then
# Getting the last existing file descriptor of ~/.drive-google/logs/drive-google.log
fd=$(ls -al /proc/$$/fd | grep ~/.drive-google/logs/drive-google.log | sed -E 's|^.* ([0-9]+) -> .*$|\1|g' | sort -V | tail -n 1)
# Case where fd is unset, i.e the file ~/.drive-google/logs/drive-google.log has not yet been opened
if [[ -z $fd ]]; then
lowest_unused_fd ()
{
local fd=0
while [ -e /proc/$$/fd/${fd} ]; do
fd=$((fd+1))
done
echo $fd
}
fd=$(lowest_unused_fd)
# Opening ~/.drive-google/logs/drive-google.log as file descriptor $fd for appending
eval "exec $fd>> ~/.drive-google/logs/drive-google.log"
fi
# Writing the trace output generated when set -x is enabled to file descriptor $fd
eval "BASH_XTRACEFD=$fd"
# Logging line numbers - We could also use ${0} for ${BASH_SOURCE}
BASH_SOURCE_BASENAME=$(basename ${BASH_SOURCE})
export PS4='${BASH_SOURCE_BASENAME}.${LINENO}+ '
# Expanding all variables and prints the full commands before output of the command
set -x
fi
# Preventing globbing (pathname expansion)
set -o noglob
# Allowing extended globbing
shopt -s extglob
object_name=$1
# Getting the local object type and putting it in front
object_type=$(stat -L -c %F "$object_name")
if [[ ("$object_type" =~ 'regular file') || ("$object_type" =~ 'regular empty file') ]]; then
type='-'
elif [[ "$object_type" =~ 'directory' ]]; then
type='d'
else
type='?'
fi
if [[ ("$type" == '-') || ("$type" == '?') ]]; then
# Getting the object size
object_size=$(stat -L -c %s "$object_name")
size=$(numfmt --to=iec --format="%.2f" --round=nearest --suffix=B $object_size)
# Returning "<object_type> <object_size> <object_name>"
echo "${type} ${size} ${object_name}"
else
# Returning "<object_type> <object_size> <object_name>"
echo "${type} 0.00B ${object_name}"
fi
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