Merge pull request #923 from kaliappan01/tar-py

tar_py added

Author: pawangeek

tar_py/README.md

@@ -0,0 +1,30 @@
+# tar_py Name
+
+**The script will be able create, list and extract tar ball files using python**  
+
+## Setup instructions
+
+Explain how to setup and run your package/script in user's system
+
+## Usage
+Create tar ball   
+`python main.py -op create -tf tar_file_name_.tar -f folder_name/`
+
+List tar ball contents   
+`python main.py -op list -tf tar_file_name_.tar`
+
+Extract tar ball   
+`python main.py -op extract -tf tar_file_name_.tar -f folder_name/`
+
+Note: add compression extension wherever necessary
+## Output
+
+Display images/gifs/videos of output/result of your script so that users can visualize it
+
+## Author(s)
+
+[Kaliappan Yadav](https://github.com/kaliappan01)
+
+## Disclaimers, if any
+
+Use this section to mention if any particular disclaimer is required

tar_py/main.py

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+VENV ?= .venv
+REQUIREMENTS_FILE ?= requirements.txt
+
+init:
+	python3 -m venv $(VENV)
+	$(VENV)/bin/python -m pip install --upgrade pip
+	if [ -f $(REQUIREMENTS_FILE) ]; \
+	    then $(VENV)/bin/python -m pip install -r $(REQUIREMENTS_FILE); \
+    fi

tar_py/makefile

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+import tarfile
+import os
+
+
+def list_tar(archive, verbosity):
+    """List a TAR archive with the tarfile Python module."""
+    try:
+        with tarfile.open(archive) as tfile:
+            tfile.list(verbose=verbosity > 1)
+    except Exception as err:
+        msg = "error listing %s: %s" % (archive, err)
+        print(msg)
+    return None
+
+
+test_tar = list_tar
+
+
+def extract_tar(archive, outdir):
+    """Extract a TAR archive with the tarfile Python module."""
+    try:
+        with tarfile.open(archive) as tfile:
+            tfile.extractall(path=outdir)
+    except Exception as err:
+        msg = "error extracting %s: %s" % (archive, err)
+        print(msg)
+    return None
+
+
+def create_tar(archive, folder_name, compression=None):
+    """Create a TAR archive with the tarfile Python module."""
+    mode = "w:"
+    if compression is not None:
+        mode = get_tar_mode(compression)
+    try:
+        with tarfile.open(archive, mode) as tfile:
+            for filename in os.listdir(folder_name):
+                tfile.add(folder_name + filename, arcname=filename)
+    except Exception as err:
+        msg = "error creating %s: %s" % (archive, err)
+        print(msg)
+    return None
+
+
+def get_tar_mode(compression):
+    """Determine tarfile open mode according to the given compression."""
+    if compression == 'gzip':
+        return 'w:gz'
+    if compression == 'bzip2':
+        return 'w:bz2'
+    if compression == 'lzma':
+        return 'w:xz'
+    if compression:
+        msg = 'pytarfile does not support %s for tar compression'
+        print(msg)
+    # no compression
+    return 'w'