Helper module to create or unpack tar archives, compress or uncompress files.
Project description
jk_packunpack
Introduction
Helper module to create or unpack tar archives, compress or uncompress files.
Information about this module can be found here:
Why this module?
For a wide variety of applications it would be very convenient to have a simple API for packing/unpacking tar files and for compressing/uncompressing files with standard algorithms. This is the reason why this module has been created: To simplify such tasks.
Important note
ATTENTION: The API of this module has been changed with the release 0.2022.2.6
.
The reasons for this quite uncommon modification:
- The author was able to improve the API and it does not make much sense to continue with an API of lower quality.
- To the knowledge of the author this module does not have many users anyway.
- An upgrade to the new API is simple.
Upgrading is very simple. For this you have two possibilities:
- If you want to continue using the old API please refer to classes
Packer1
andUnpacker1
instead ofPacker
andUnpacker
. - If you want to use the more advanced API modify your calls to methods in
Packer
andUnpacker
. This is a simple step as the new implementations are very similar, you just need to invoke them with named arguments.
Limitations of this module
This module supports the following compression algorithms only:
gzip
bzip2
xz
This compression/uncompression is performed using the standard implementations provided by Python.
Packing and unpacking of tar
files is supported as well, but only on POSIX operating systems. The reason for this is that
internally the tar
program is invoked directly, which is not available on non-POSIX operating systems.
How to use this module
Import this module
Please include this module into your application using the following code:
import jk_packunpack
For logging import the jk_logging
module:
import jk_logging
Compress a file
The following example demonstrates how to compress a file with gzip
:
inputFilePath = "myinputfile.txt"
compression = "gzip"
chmodValue = 0o700
with jk_logging.ConsoleLogger.create() as log:
resultInfo = jk_packunpack.Packer.compressFile(
filePath=inputFilePath,
compression=compression,
chModValue=chmodValue,
log=log)
print(resultInfo.toFilePath)
For chmodValue
you can specify a string such as "rw-rw----
" or an instance of jk_utils.ChModValue
as well.
For compression you can specify any of these values: gz
, gzip
, bz2
, bzip2
, xz
.
Uncompress a file
The following example demonstrates how to uncompress a file:
inputFilePath = "myinputfile.txt.gz"
chmodValue = 0o700
with jk_logging.ConsoleLogger.create() as log:
resultFilePath = jk_packunpack.Unpacker.uncompressFile(
filePath=inputFilePath,
bDeleteOriginal=True,
chModValue=chmodValue,
log=log)
print(resultFilePath)
For chmodValue
you can specify a string such as "rw-rw----
" or an instance of jk_utils.ChModValue
as well.
Uncompressing will automatically detect the compression format used by inspecting the file extension.
Pack a directory
The following example demonstrates how to pack the contents of a directory using tar
:
inputDirPath = "./my/example/dir"
outputTarFilePath = "./my/example-dir.tar"
chmodValue = 0o700
with jk_logging.ConsoleLogger.create() as log:
jk_packunpack.Packer.tarDirContents(
srcDirPath=inputDirPath,
destTarFilePath=outputTarFilePath,
chModValue=chmodValue,
log=log)
For chmodValue
you can specify a string such as "rw-rw----
" or an instance of jk_utils.ChModValue
as well.
Unpack a directory
The following example demonstrates how to unpack a tar
file to a directory:
inputTarFilePath = "./my/example-dir.tar"
outputDirPath = "./my/new/dir"
with jk_logging.ConsoleLogger.create() as log:
jk_packunpack.Unpacker.untarToDir(
srcTarFilePath=inputTarFilePath,
destDirPath=outputDirPath,
log=log)
Contact Information
This work is Open Source. This enables you to use this work for free.
Please have in mind this also enables you to contribute. We, the subspecies of software developers, can create great things. But the more collaborate, the more fantastic these things can become. Therefore Feel free to contact the author(s) listed below, either for giving feedback, providing comments, hints, indicate possible collaborations, ideas, improvements. Or maybe for "only" reporting some bugs:
- Jürgen Knauth: pubsrc@binary-overflow.de
License
This software is provided under the following license:
- Apache Software License 2.0
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