polymerase
Polymerase is a CLI tool for easy templating using environment variables and Vault values.
Polymerase takes a file containing Go-style template directives {{ }} as an argument, populates the template directives with values based on environment variables and Vault, and outputs the result to stdout. Input can also be provided via stdin.
Supported Vault auth backends include token and App ID. Additionally, default Go template functions are supported out of the box.
Installation
go install github.com/dollarshaveclub/polymerase
Usage
Usage:
polymerase [flags]
Examples:
polymerase <filename>
Flags:
-a, --app-id string Vault App-ID. Can use APP_ID environment variable instead.
-u, --user-id-path string Path to user id. Can use USER_ID_PATH environment variable instead.
-v, --vault-addr string Vault server address (including protocol and port). Can use VAULT_ADDR environment variable instead.
-t, --vault-token string Vault token. Can use VAULT_TOKEN environment variable instead.
Examples
File example
Given there is a file with the name file.tmpl and contents:
Hello, {{ .LOCATION }}! My name is {{ vault "secret_agents/007/first_name" }}.
Running the command:
VAULT_ADDR=https://vault.internal VAULT_TOKEN=1234kasd LOCATION=World polymerase file.tmpl
Polymerase will produce:
Hello, World! My name is James.
Stdin example
Running the command:
echo "Hello, {{ .LOCATION }}!" | VAULT_ADDR=https://vault.internal VAULT_TOKEN=1234kasd LOCATION=World polymerase
Polymerase will produce:
Hello, World!