65 lines
1.3 KiB
Go
65 lines
1.3 KiB
Go
package jsenv
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import (
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"fmt"
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"github.com/evanw/esbuild/pkg/api"
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)
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const (
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// limiting the support for loaders and targets
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LoaderJS TransformLoader = TransformLoader(api.LoaderJS)
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LoaderJSX TransformLoader = TransformLoader(api.LoaderJSX)
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LoaderTS TransformLoader = TransformLoader(api.LoaderTS)
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TargetNoop TransformTarget = 0
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TargetES5 TransformTarget = TransformTarget(api.ES5)
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TargetES2016 TransformTarget = TransformTarget(api.ES2016)
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)
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type (
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TransformLoader uint8
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TransformTarget uint8
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t struct {
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ldr TransformLoader
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tr TransformTarget
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}
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noop struct{}
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Transformer interface {
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Transform(string) ([]byte, error)
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}
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)
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func NewTransformer(loader TransformLoader, target TransformTarget) Transformer {
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if target == TargetNoop {
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return &noop{}
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}
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return &t{
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ldr: loader,
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tr: target,
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}
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}
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// Transform uses the loaders and targets and transpiles
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func (tt t) Transform(p string) (b []byte, err error) {
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result := api.Transform(p, api.TransformOptions{
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Loader: api.Loader(tt.ldr),
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Target: api.Target(tt.tr),
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})
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if len(result.Errors) > 0 {
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return []byte{}, fmt.Errorf("could not transform payload: %s", result.Errors[0].Text)
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}
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return result.Code, nil
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}
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// Fallback transform that keeps the original intact
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func (tt noop) Transform(p string) ([]byte, error) {
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return []byte(p), nil
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}
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