#embed

Embed a file or all files under a directory into one MoonBit source file.

moon runwasm moonbit-community/embed ./fixtures -o fixtures_bundle.mbt

The -o <output.mbt> option is required. Missing parent directories for the output path are created recursively. Use --prune <path> or -p <path> to skip files or directories relative to the input directory. The option can be repeated:

moon runwasm moonbit-community/embed ./fixtures -o fixtures_bundle.mbt --prune _build --prune cache/tmp.bin

For a directory input like ./fixtures, files become fields on a generated fixture record, and subdirectories become nested fixture records. UTF-8 text files become String fields, and binary files become Bytes fields. File contents are emitted as private top-level constants so the final fixture value stays short:

let _embed_readme_md : String =
  #|...

let _embed_image_png : Bytes =
  ([
    0xFF, 0xAA,
  ] : Bytes)

pub struct FixturesFixture {
  readme_md : String
  nested : NestedFixture
}

pub struct NestedFixture {
  image_png : Bytes
}

pub let fixtures : FixturesFixture = {
  readme_md: _embed_readme_md,
  nested: {
    image_png: _embed_image_png,
  },
}

For a single file input like ./fixtures/readme.md, the generated output has one top-level constant:

let _embed_readme_md : String =
  #|...

pub let readme_md : String = _embed_readme_md

For a single binary file input, the generated constant has type Bytes:

let _embed_image_png : Bytes =
  ([
    0xFF, 0xAA,
  ] : Bytes)

pub let image_png : Bytes = _embed_image_png

Source Files

main.mbt

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