Class: Kdep::TemplateContext

Inherits:
Object
  • Object
show all
Defined in:
lib/kdep/template_context.rb

Instance Method Summary collapse

Constructor Details

#initialize(config, secrets = {}) ⇒ TemplateContext

Returns a new instance of TemplateContext.



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# File 'lib/kdep/template_context.rb', line 5

def initialize(config, secrets = {})
  @config = config
  @secrets = secrets

  # Expose top-level config keys as methods for cleaner templates
  config.each do |key, value|
    define_singleton_method(key.to_sym) { value } if key.is_a?(String)
  end
end

Instance Method Details

#configmap_value(value, indent = 4) ⇒ Object

Helper: render one ConfigMap data: value.

Multiline values become YAML block scalars, so config files mounted into containers (prometheus.yml, fluent.conf, curator action files...) survive intact instead of collapsing into one quoted line (repleadfy/kdep#1). Single-line values stay quoted strings: ConfigMap data values must be strings, so an unquoted 8080 or true would be rejected by the API.

indent is the column the block body sits at -- two levels under data:.



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# File 'lib/kdep/template_context.rb', line 50

def configmap_value(value, indent = 4)
  str = value.to_s
  return str.to_json unless str.include?("\n")

  pad = " " * indent
  # `|` keeps a single trailing newline, `|-` strips it -- preserve whichever
  # the value actually had, since some consumers care.
  chomp = str.end_with?("\n")
  body = chomp ? str.sub(/\n\z/, "") : str
  lines = body.split("\n", -1).map { |line| line.empty? ? "" : "#{pad}#{line}" }

  "#{chomp ? "|" : "|-"}\n#{lines.join("\n")}"
end

#get_binding ⇒ Object 



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# File 'lib/kdep/template_context.rb', line 15

def get_binding
  binding
end

#image_ref ⇒ Object

Helper: fully-qualified container image reference, "[registry/]image:tag".

An empty or whitespace-only registry: counts as absent. Ruby treats "" as truthy, so the old inline @config["registry"] ? ... : ... ternary in every template emitted a leading slash ("/image:tag") for registry: "" -- a real gotcha for upstream-image deploys (repleadfy/kdep#1). Same for a blank tag:, which would otherwise render an invalid trailing colon.



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# File 'lib/kdep/template_context.rb', line 31

def image_ref
  registry = @config["registry"].to_s.strip
  image = @config["image"].to_s
  tag = @config["tag"].to_s.strip
  tag = "latest" if tag.empty?

  repository = registry.empty? ? image : "#{registry}/#{image}"
  "#{repository}:#{tag}"
end

#yaml_value(val) ⇒ Object

Helper: render a value as YAML-safe string



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# File 'lib/kdep/template_context.rb', line 20

def yaml_value(val)
  val.is_a?(String) ? val : val.to_s
end