25 lines
836 B
Go
25 lines
836 B
Go
package scriptx
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import (
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"fmt"
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"os"
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)
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// Runnable is a pipeline that can be executed by Run. The *script.Pipe type implements this interface
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type Runnable interface {
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// Stdout invokes the runnable task with the result written to stdout, if successful. It returns the number
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// of bytes written out, or an error if the task was unsuccessful.
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Stdout() (int, error)
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}
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// Run takes a number of pipes and executes them in order, until they all succeed or the first error is encountered.
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// If a runnable task fails with an error, it will write the error to stderr and terminate the program with exit code 1.
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// It's designed to be used within the "main()" function.
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func Run(pipes ...Runnable) {
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for _, pipe := range pipes {
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if _, err := pipe.Stdout(); err != nil {
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fmt.Fprintf(os.Stderr, "%v\n", err)
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os.Exit(1)
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}
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}
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}
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