1 unstable release
0.1.0 | Jun 27, 2024 |
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#451 in WebAssembly
98KB
2.5K
SLoC
WEPL
The WebAssembly Component repl.
Building from Source
You can build wepl
from source by running cargo build --release
(or cargo build
to build in debug mode).
Installing wepl
You can install wepl
from crates.io by running cargo install wepl --locked
.
You can also install wepl
on your local system by running cargo install --path . --locked
.
Example
$ wepl mycomponent.wasm
> .exports
uppercase: func(input: string) -> string
> uppercase
uppercase: func(input: string) -> string
> s = "hello"
s: string
> uppercase(s)
"HELLO"
Built-in Functions
Built-in functions can be called by using the .
prefix.
Supported functions include:
.imports
: print a list of all the component's imports.exports
: print a list of all the component's exports.link $function $wasm
: satisfy the imported function$func
with an export from the wasm component$wasm
.compose $adapter
: satisfy imports with the supplied adapter module (e.g., to compose withWASI-Virt
adapter).type $type
: inspect a type's$type
definition in scope.help
: print help information (?
is alias for this built-in)
Features
- Exported function evaluation
- Listing imports and exports
- Variable assignment
- Type checking
- Satisfying imports with other WebAssembly Components
- Basic component composition
Compatibility
wepl
is currently tied to the wasmtime 17 release. Components that work with that release should work in wepl
.
Dependencies
~52MB
~1M SLoC