Replace environment variables in files in a GitHub Action

Inputs

• input_file
  • Path to file with the placeholders to replace. If directory, will replace all files in the directory.
• output_file
  • Path to output file. If input_file is directory, will be a directory too.
  • Optional, defaults to input_file
• pattern
  • Which placeholders to replace.
  • Options:
    • single_dollar_brackets -> ${VARIABLE}
    • double_dollar_brackets -> ${{VARIABLE}}
    • double_underscore -> __VARIABLE__
  • Optional, defaults to single_dollar_brackets
• fail_on_missing_env
  • If true, will fail if a key required in the input file is missing in the environment.
  • default: false

Example usage

The input_file:

{
  "foo": "${FOO_BAR_123}"
}

⚠️ no spaces around the key.

The workflow:

name: whatever

env:
  FOO_BAR_123: 'literally whatever'

The result:

{
  "foo": "literally whatever"
}

License

Licensed under MIT license.
Please also see licenses.txt