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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,44 @@ | ||
package exec | ||
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import ( | ||
"bytes" | ||
"io" | ||
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"github.com/docker/docker/pkg/stdcopy" | ||
) | ||
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// ProcessOptions defines options applicable to the reader processor | ||
type ProcessOptions struct { | ||
Reader io.Reader | ||
} | ||
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// ProcessOption defines a common interface to modify the reader processor | ||
// These options can be passed to the Exec function in a variadic way to customize the returned Reader instance | ||
type ProcessOption interface { | ||
Apply(opts *ProcessOptions) | ||
} | ||
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type ProcessOptionFunc func(opts *ProcessOptions) | ||
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func (fn ProcessOptionFunc) Apply(opts *ProcessOptions) { | ||
fn(opts) | ||
} | ||
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func Multiplexed() ProcessOption { | ||
return ProcessOptionFunc(func(opts *ProcessOptions) { | ||
done := make(chan struct{}) | ||
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var outBuff bytes.Buffer | ||
var errBuff bytes.Buffer | ||
go func() { | ||
if _, err := stdcopy.StdCopy(&outBuff, &errBuff, opts.Reader); err != nil { | ||
return | ||
} | ||
close(done) | ||
}() | ||
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<-done | ||
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opts.Reader = &outBuff | ||
}) | ||
} |
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