cc68f8ee12
This adds a new top-level type FSConfig, which is configured via
`ModuleConfig.WithFSConfig(fcfg)`. This implements read-only and
read-write directory mounts, something not formally supported before. It
also implements `WithFS` which adapts a normal `fs.FS`. For convenience,
we retain the old `ModuleConfig.WithFS` signature so as to not affect
existing users much. A new configuration for our emerging raw
filesystem, `FSConfig.WithSysfs()` will happen later without breaking
this API.
Here's an example:
```
moduleConfig = wazero.NewModuleConfig().
// Make the current directory read-only accessible to the guest.
WithReadOnlyDirMount(".", "/")
// Make "/tmp/wasm" accessible to the guest as "/tmp".
WithDirMount("/tmp/wasm", "/tmp")
```
Signed-off-by: Adrian Cole <adrian@tetrate.io>
28 lines
578 B
Go
28 lines
578 B
Go
package wazero_test
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import (
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"embed"
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"io/fs"
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"log"
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"github.com/tetratelabs/wazero"
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)
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//go:embed testdata/index.html
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var testdataIndex embed.FS
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var moduleConfig wazero.ModuleConfig
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// This example shows how to configure an embed.FS.
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func Example_withFSConfig_embedFS() {
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// Strip the embedded path testdata/
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rooted, err := fs.Sub(testdataIndex, "testdata")
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if err != nil {
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log.Panicln(err)
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}
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moduleConfig = wazero.NewModuleConfig().
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// Make "index.html" accessible to the guest as "/index.html".
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WithFSConfig(wazero.NewFSConfig().WithFSMount(rooted, "/"))
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}
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