Pins the versions of pip entries in the requirements.txt file. Unlike freeze, it only does the requirements file.

pip_version_pin.sh

#!/bin/bash

# Check if requirements.txt exists
if [ ! -f "requirements.txt" ]; then
    echo "Error: requirements.txt not found."
    exit 1
fi

# Remove existing requirements2.txt if it exists
if [ -f "requirements2.txt" ]; then
    rm -f requirements2.txt
fi

# Ensure the input file ends with a newline
sed -i -e '$a\' requirements.txt

# Iterate through each line in requirements.txt
while IFS= read -r package; do
    # Check if the package is installed
    version=$(pip show "$package" | grep -i "^version" | awk '{print $2}')
    if [ -n "$version" ]; then
        # Append the package name and version to requirements2.txt
        echo "${package}==${version}" >> requirements2.txt
    else
        echo "Warning: Package $package not found. Skipping."
    fi
done < requirements.txt

echo "Requirements updated in requirements2.txt"