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ContextResolver

warble_cli

Trait ContextResolver 

Source 
pub trait ContextResolver {
    // Required method
    fn resolve(
        &self,
        binding: &BindingFile,
        project_dir: &Path,
    ) -> Result<Box<dyn ContextLoader>, String>;
}
Expand description

Turns a parsed context/binding.yml into the ContextLoader the compiler probes.

The counterpart of ComponentSource for context: components could already be supplied by a host, context could not. A host implements this to bind a semantic layer this checkout cannot read itself — one held by a service, for instance — without warble learning anything about it.

A resolver is free to do no I/O at all, and warble compile must stay runnable offline and without credentials. A host binding a remote layer is expected to resolve from a snapshot it pulled earlier, or to return a loader that declines the schema probes (ContextLoader::can_answer) rather than reaching for the network mid-compile.

Required Methods§

Source

fn resolve( &self, binding: &BindingFile, project_dir: &Path, ) -> Result<Box<dyn ContextLoader>, String>

Build the loader for binding. project_dir is the Warble project directory, so a resolver reading from disk can resolve a relative binding.project against it.

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§