implements a dependency graph algorithm */.

Expand replaces ${var} or $var in the string based on the mapping function.

Label returns the label from the context, or zero value if not defined.

Logger returns the logger from the context, or nil if not defined.

NewPluginMeta returns metadata for a plugin.

Create a new provider with tasks in the order they have been created.

WithLabel returns a context with the given label.

WithLogger returns a context with the given logger.