[BK-2020-03.git] / user / bkxz

#!/bin/bash

# Date: 2020-04-09T00:09Z

# Author: Steven Baltakatei Sandoval

# Description: Compresses a file or directory using xz at max
# settings. Saves compressed .tar.xz file in the same directory as the
# original file.

# Usage: bkxz [ file or dir ]

echoerr() { echo "$@" 1>&2; } # Define error display function.

TARGET="$1" # Identify first argument as target file or directory.

if ! command -v tar >/dev/null 2>&1; then # Check that 'tar' command exists.
    echoerr "ERROR: Command doesn't exist: tar";
fi

if ! command -v xz >/dev/null 2>&1; then # check that 'xz' command exist.
    echoerr "ERROR: Command doesn't exist: xz. Suggestion: Install 'xz-utils' package.";
    exit 1;
fi

if ! ( [ -f "$TARGET" ] || [ -d "$TARGET" ] ); then # check that TARGET is a file or dir.
    echoerr "ERROR: Target is not a file or dir."; exit 1;
fi


TARGET_BASENAME="$(basename "$TARGET")" # Save name of target's basename (ex: 'input.txt' from '/tmp/input.txt').
TARGET_DIRNAME="$(dirname "$TARGET")" # Save name of target's directory (ex: '/tmp' from '/tmp/input.txt').

OUTPUT="$TARGET_DIRNAME"/"$TARGET_BASENAME".tar.xz # Define output file to be in same location as target but with .tar.xz extension.

pushd "$TARGET_DIRNAME" 1>/dev/null 2>&1 # Temporarily navigate to directory holding TARGET.
tar cf - "$TARGET_BASENAME" | xz -9e --lzma2=dict=1536MiB,mf=bt4,nice=273,depth=1000 > "$OUTPUT"
echoerr "Archive saved at: $OUTPUT"
popd 1>/dev/null 2>&1 # Return to original working directory.
Commit	Line	Data
2feb5df8 SBS	1	#!/bin/bash
	2
	3	# Date: 2020-04-09T00:09Z
	4
	5	# Author: Steven Baltakatei Sandoval
	6
	7	# Description: Compresses a file or directory using xz at max
	8	# settings. Saves compressed .tar.xz file in the same directory as the
	9	# original file.
	10
	11	# Usage: bkxz [ file or dir ]
	12
	13	echoerr() { echo "$@" 1>&2; } # Define error display function.
	14
	15	TARGET="$1" # Identify first argument as target file or directory.
	16
	17	if ! command -v tar >/dev/null 2>&1; then # Check that 'tar' command exists.
	18	echoerr "ERROR: Command doesn't exist: tar";
	19	fi
	20
	21	if ! command -v xz >/dev/null 2>&1; then # check that 'xz' command exist.
	22	echoerr "ERROR: Command doesn't exist: xz. Suggestion: Install 'xz-utils' package.";
	23	exit 1;
	24	fi
	25
	26	if ! ( [ -f "$TARGET" ] \|\| [ -d "$TARGET" ] ); then # check that TARGET is a file or dir.
	27	echoerr "ERROR: Target is not a file or dir."; exit 1;
	28	fi
	29
	30
	31	TARGET_BASENAME="$(basename "$TARGET")" # Save name of target's basename (ex: 'input.txt' from '/tmp/input.txt').
	32	TARGET_DIRNAME="$(dirname "$TARGET")" # Save name of target's directory (ex: '/tmp' from '/tmp/input.txt').
	33
	34	OUTPUT="$TARGET_DIRNAME"/"$TARGET_BASENAME".tar.xz # Define output file to be in same location as target but with .tar.xz extension.
	35
	36	pushd "$TARGET_DIRNAME" 1>/dev/null 2>&1 # Temporarily navigate to directory holding TARGET.
	37	tar cf - "$TARGET_BASENAME" \| xz -9e --lzma2=dict=1536MiB,mf=bt4,nice=273,depth=1000 > "$OUTPUT"
	38	echoerr "Archive saved at: $OUTPUT"
	39	popd 1>/dev/null 2>&1 # Return to original working directory.