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zeekayandHanzo Dev
3e5f509c69
The contract was written down twice — zip declares Module and Loader, and the loader beside base's runners declared its own copy. Structural typing was the only thing keeping them equal, which is a property nobody can see and a compiler will not check. This implements zip's. The loader, the manifest and the runners live here so cloud can stop carrying a second goja runtime of its own — a shim, a bundler and a third registry that answered the same question this one does. native, goja, wazero and pyvm. wazero is the reason this is not a list of four languages: anything compiled to WebAssembly ahead of time arrives without a new runner, and Rust walks through that door rather than getting one built for it. pyvm is real CPython through cgo with PEP 684 sub-interpreters, behind a build tag, because embedding the language beats reimplementing a subset of it. Its one dependency on base was a single call for an unguessable string, which crypto/rand says directly. Co-authored-by: Hanzo Dev <[email protected]>
36 lines
940 B
Go
36 lines
940 B
Go
package extruntime
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import (
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"encoding/json"
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"fmt"
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"os"
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"path/filepath"
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)
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// LoadManifest reads extension.json from dir and returns the parsed manifest.
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// JSON over TOML — base has zero TOML deps and the manifest is small enough
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// that the JSON ergonomics tax is irrelevant.
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func LoadManifest(dir string) (*Manifest, error) {
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p := filepath.Join(dir, "extension.json")
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data, err := os.ReadFile(p)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, fmt.Errorf("%w: %s", ErrNoManifest, p)
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}
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return nil, fmt.Errorf("read manifest %s: %w", p, err)
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}
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var m Manifest
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if err := json.Unmarshal(data, &m); err != nil {
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return nil, fmt.Errorf("%w: %s: %v", ErrBadManifest, p, err)
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}
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if m.Name == "" {
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return nil, fmt.Errorf("%w: %s: name is required", ErrBadManifest, p)
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}
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if m.Runtime == "" {
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return nil, fmt.Errorf("%w: %s: runtime is required (native|goja|wazero|v8go)", ErrBadManifest, p)
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}
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return &m, nil
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}
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