Struct TemplateContextBuilder 

pub struct TemplateContextBuilder { /* private fields */ }

Fluent API for building template contexts

Provides method chaining for easy context construction:

use clnrm_template::TemplateContext;

let context = TemplateContext::builder()
    .var("service_name", "my-service")
    .var("environment", "production")
    .matrix("browser", vec!["chrome", "firefox"])
    .otel("endpoint", "http://localhost:4318")
    .build();

Implementations

impl TemplateContextBuilder

pub fn new() -> Self

Start building a new template context

pub fn with_defaults() -> Self

Start with default PRD v1.0 variables

pub fn var<K: Into<String>, V: Into<Value>>(self, key: K, value: V) -> Self

Add a variable to the vars namespace

Arguments

• key - Variable name
• value - Variable value (string, number, bool, array, or object)

pub fn vars<K, V, I>(self, vars: I) -> Self

where K: Into<String>, V: Into<Value>, I: IntoIterator<Item = (K, V)>,

Add multiple variables at once

pub fn matrix<K: Into<String>, V: Into<Value>>(self, key: K, value: V) -> Self

Add a matrix parameter

Arguments

• key - Matrix parameter name
• value - Parameter value

pub fn matrix_params<K, V, I>(self, params: I) -> Self

where K: Into<String>, V: Into<Value>, I: IntoIterator<Item = (K, V)>,

Add multiple matrix parameters

pub fn otel<K: Into<String>, V: Into<Value>>(self, key: K, value: V) -> Self

Add an OpenTelemetry configuration value

Arguments

• key - OTEL configuration key
• value - Configuration value

pub fn otel_config<K, V, I>(self, config: I) -> Self

where K: Into<String>, V: Into<Value>, I: IntoIterator<Item = (K, V)>,

Add multiple OTEL configuration values

pub fn var_with_env(self, key: &str, env_key: &str, default: &str) -> Self

Add variable with environment variable precedence

Sets variable with priority: existing vars → ENV → default

pub fn merge_vars(self, user_vars: HashMap<String, Value>) -> Self

Merge user-provided variables (highest precedence)

pub fn load_vars_from_file<P: AsRef<Path>>(self, path: P) -> Result<Self>

Load variables from a JSON file

Arguments

• path - Path to JSON file containing variables

pub fn load_matrix_from_file<P: AsRef<Path>>(self, path: P) -> Result<Self>

Load matrix parameters from a TOML file

Arguments

• path - Path to TOML file containing matrix parameters

pub fn build(self) -> TemplateContext

Build the final template context

Trait Implementations

impl Default for TemplateContextBuilder

fn default() -> Self

Returns the “default value” for a type.