#mproc examples

This directory contains runnable downstream generator examples for mproc_gen.

#Minimal generator

This example contains the source of a downstream generator binary:

examples/minimal_generator/cmd/main

When a generator is published as a MoonBit binary dependency, package authors should invoke that installed binary from a rule and dev_build, not shell out to moon run.

rule(
  name: "minimal_generator",
  command: "$mod_dir/.mooncakes/Milky2018/minimal_generator/minimal_generator $input -o $output",
)
dev_build(
  rule: "minimal_generator",
  input: "fixtures/input.mbt",
  output: "generated.g.mbt",
)

dev_build runs for package authors during moon check, moon build, and moon test. It is not triggered when the package is used as a dependency, so generated outputs should be committed.

For local source validation before publishing the binary, run:

mkdir -p .test-tmp/examples/minimal_generator
moon run examples/minimal_generator/cmd/main \
  examples/minimal_generator/fixtures/input.mbt \
  examples/minimal_generator/fixtures/extra.mbt \
  -o .test-tmp/examples/minimal_generator/generated.g.mbt
diff -u examples/minimal_generator/expected/generated.g.mbt \
  .test-tmp/examples/minimal_generator/generated.g.mbt

The example parses the positional input sources, invokes a downstream callback with the runner-owned builder, and writes the explicit output target. It does not interpret attributes or infer package context.

Site source Report issue Packages Build queue Skills Statistics