Parameter	Env Var	Description
`use_env`	`PLUGIN_USE_ENV`	When `true`, all current environment variables are used as token variables.
`variables`	`PLUGIN_VARIABLES`	Variable source(s): inline JSON / `@<glob>` file / `$ENV_VAR`.

Optional

Parameter	Env Var	Default	Description
`root`	`PLUGIN_ROOT`	`CNB_WORKSPACE` or cwd	Root directory for resolving relative glob paths.
`encoding`	`PLUGIN_ENCODING`	`auto`	File encoding: `auto` / `utf-8` / `utf-16le` / `utf-16be`.
`token_pattern`	`PLUGIN_TOKEN_PATTERN`	`default`	Token pattern, see below.
`token_prefix`	`PLUGIN_TOKEN_PREFIX`	—	Custom token prefix (required when `token_pattern=custom`).
`token_suffix`	`PLUGIN_TOKEN_SUFFIX`	—	Custom token suffix (required when `token_pattern=custom`).
`missing_var_action`	`PLUGIN_MISSING_VAR_ACTION`	`none`	Action when variable is not found: `none` / `keep` / `replace`.
`missing_var_default`	`PLUGIN_MISSING_VAR_DEFAULT`	`""`	Default value used when `missing_var_action=replace`.
`missing_var_log`	`PLUGIN_MISSING_VAR_LOG`	`warn`	Log level for missing variables: `off` / `info` / `warn` / `error`.
`escape`	`PLUGIN_ESCAPE`	`auto`	Value escape type: `auto` / `off` / `json` / `xml` / `custom`.
`escape_char`	`PLUGIN_ESCAPE_CHAR`	—	Escape character for `custom` escape.
`chars_to_escape`	`PLUGIN_CHARS_TO_ESCAPE`	—	Characters to escape when using `custom` escape.
`recursive`	`PLUGIN_RECURSIVE`	`false`	Enable recursive token replacement (values can contain other tokens).
`add_bom`	`PLUGIN_ADD_BOM`	`false`	Add BOM when writing files.
`transforms`	`PLUGIN_TRANSFORMS`	`false`	Enable transform functions in tokens.
`transforms_prefix`	`PLUGIN_TRANSFORMS_PREFIX`	`(`	Transform prefix.
`transforms_suffix`	`PLUGIN_TRANSFORMS_SUFFIX`	`)`	Transform suffix.
`case_insensitive_paths`	`PLUGIN_CASE_INSENSITIVE_PATHS`	`false`	Case-insensitive glob matching.
`include_dot_paths`	`PLUGIN_INCLUDE_DOT_PATHS`	`false`	Include dot-prefixed files and directories.
`separator`	`PLUGIN_SEPARATOR`	`.`	Separator used when flattening nested variable names.
`log_level`	`PLUGIN_LOG_LEVEL`	`info`	Log level: `debug` / `info` / `warn` / `error` / `off`.

Token Patterns

Pattern	Prefix	Suffix	Example
`default`	`#{`	`}#`	`#{MY_VAR}#`
`azurepipelines`	`$(`	`)`	`$(MY_VAR)`
`doublebraces`	`{{`	`}}`	`{{MY_VAR}}`
`doubleunderscores`	`__`	`__`	`__MY_VAR__`
`githubactions`	`${{`	`}}`	`${{MY_VAR}}`
`octopus`	`#{`	`}`	`#{MY_VAR}`
`custom`	user-defined	user-defined	—

Variables Format

PLUGIN_VARIABLES accepts multiple sources separated by newlines or ;:

# Inline JSON
{"key": "value", "nested": {"a": "1"}}

# Load from file(s) — supports JSON / YAML, supports glob
@configs/*.json

# Load from an environment variable (its value must be a JSON string)
$MY_JSON_ENV

Nested objects are flattened and keys are uppercased automatically:

{"db": {"host": "localhost", "port": 5432}}

Results in variables: DB.HOST=localhost, DB.PORT=5432 (using default separator .).

Transforms

When transforms=true, you can include a transform function inside a token:

#{myvar(lower)}#     → lowercase
#{myvar(upper)}#     → uppercase
#{myvar(base64)}#    → Base64 encode
#{myvar(indent,4)}#  → indent with 4 spaces
#{myvar(raw)}#       → raw value (no escaping applied)

Output Variables

After execution, the plugin sets the following pipeline output variables:

Variable	Description
`files`	Number of files processed
`tokens`	Total tokens found
`replaced`	Tokens successfully replaced
`defaults`	Times the default value was used
`transforms`	Transform functions executed

Pipeline Examples

steps:
  - name: Replace tokens in config files
    image: cnb.cool/r_r/replacetokens
    settings:
      sources: "config/*.json;app.yaml"
      variables: |
        {"app_name": "myapp", "version": "1.0.0"}
        @vars/production.json
      token_pattern: default
      missing_var_action: warn
      escape: auto
      log_level: info

steps:
  - name: Replace using environment variables
    image: cnb.cool/r_r/replacetokens
    settings:
      sources: "deployment.yaml => deployment.out.yaml"
      use_env: true
      token_pattern: doublebraces
      missing_var_action: keep

Sources Advanced Syntax

# Multiple globs (semicolon-separated)
**/*.json;**/*.yaml

# Output to a different file
template.json => output.json

# Wildcard output (* maps to the matched part of the input filename)
templates/*.json => out/*.json

# Relative output path (relative to the input file's directory)
config.tmpl => config.json

Build

go build -o replacetokens .

Cross-compile for Linux container:

GOOS=linux GOARCH=amd64 go build -o replacetokens .

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