hendratommy/subenv

Substitute with Environment Variables

subenv

A command line tools to help you substitute variable placeholder in a file with environment variables or files (env files)

subenv hello.txt

Usage

$ subenv --help
Usage of subenv:
  -c string
        Encoder name to use, available encoder: [ base64 ]
  -d string
        Decoder name to use, available decoder: [ base64 ]
  -e value
        File to use as env source
  -noos
        This flag can only be use when using -e. If set to true, will
        not use OS environment variables
  -v    Print version
  -version
        Print version

Build from source

• Pull this repository

  git pull https://github.com/hendratommy/subenv.git

• To build without version:

  # MacOS
  make build-darwin
  
  # Linux
  make build-linux
  
  # windows 
  make build-windows

• To build with version

  # MacOS
  make VERSION=CURRENT_VERSION build-darwin
  
  # Linux
  make VERSION=CURRENT_VERSION build-linux
  
  # windows 
  make VERSION=CURRENT_VERSION build-windows

• To build distribution:

  make VERSION=CURRENT_VERSION all

Using .env files

subenv -e test.env test.txt

We can supply more than 1 env files by repeating -e arguments:

subenv -e test1.env -e test2.env test.txt

Using encoder & decoder

We can use encoder (-c) to encode substituted values, or decoder (-d) to decode the variable value (if the environment variable is already decoded)

$ NAME=World subenv -c base64 hello2.txt
Hello V29ybGQ=

$ NAME=V29ybGQ= subenv -d base64 hello2.txt
Hello World

Supported encoder:

Name	Description	Encoder	Decoder
base64	Encode or decode using base64	Y	Y