Bash script get version from setup.py or from PKG-INFO file and export as environment variable

Question

I need to get version value from setup.py or from PKG-INFO using bash and extract environment variable with the version value for later use. (Actually I need version value for GitHub Action)

from setuptools import setup, find_packages

with open("README.md", "r") as fh:
    long_description = fh.read()

setup(
    name="helloworld",
    version="0.0.3",
    author="John",
    author_email="[email protected]",
    url="https://github.com/google/helloworld",
    description="Hello World!",
    long_description=long_description,
    long_description_content_type="text/markdown",
    packages=find_packages(),
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
    ],
    install_requires=["click"],
    python_requires='>=3.6',
    py_modules=["helloworld"],
    entry_points={"console_scripts": ["helloworld = src.main:main"]},
)

PKG-INFO:

Metadata-Version: 2.1
Name: helloworld
Version: 0.0.3
Summary: Hello World!
Home-page: https://github.com/google/helloworld
Author: John
Author-email: [email protected]
License: UNKNOWN
Platform: UNKNOWN
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Requires-Python: >=3.6
Description-Content-Type: text/markdown

# helloworld

Hello World Python
...

Asked By: ybonda

||

Source

Answer 1

I need to get version value from setup.py or from PKG-INFO using bash and extract environment variable with the version value for later use.

It’s probably easier to get the wanted data from PKG-INFO than from setup.py. Provided that there is only one Version: entry, you can do it with sed:

the_version=$(sed -n 's/^Version: *//p' PKG-INFO) ||
  echo 'no version found' 1>&2
export the_version

Explanation:

The -n option to sed suppresses its default behavior of printing the current line at the end of each cycle.
The s command removes the Version: label from any line that starts with that. The p suffix causes the result of the substitution to be printed (only) for those lines where a substitution was actually performed.
the $() construct around the sed command captures and expands to that command’s standard output, which will be the tail of the Version: line. That is then assigned to shell variable the_version.
in the event that sed terminates with non-zero exit status, the echo command is executed to print a diagnostic, which is redirected to standard error instead of standard out
the shell variable is exported so that subsequent commands run by the script will receive it in their environments.
in the event that the command exits with non-zero exit status, a diagnostic is printed to the standard error stream

Answered By: John Bollinger

Answer 2

It was easier than I though:

VERSION=$(python setup.py --version)
echo $VERSION

In the same manner you can also get the module name:

MODULE_NAME=$(python setup.py --name)
echo $MODULE_NAME

Answered By: ybonda

Answer 3

In order to use setup.cfg you can use grep.

grep version setup.cfg | cut -d '=' -f2 | xargs

Explanation:

grep version setup.cfg        # return a line containing version
cut -d '=' -f2                # extract second element delimited by =
xargs                         # trim

Example:

[metadata]
name = my_app
version = 2.0.4
author = John Doe
author_email = [email protected]

Output: 2.0.4

Combining it all together you could set environment variable by:

export VERSION=$(grep version setup.cfg| cut -d '=' -f2 | xargs)
echo $VERSION
# 2.0.4

Answered By: J.Wincewicz

Bash script get version from setup.py or from PKG-INFO file and export as environment variable

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