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31 lines
682 B
Go
31 lines
682 B
Go
package main
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import "fmt"
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import "os"
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import "runtime"
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import "path/filepath"
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// Go is a basic promise implementation: it wraps calls a function in a goroutine
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// and returns a channel which will later return the function's return value.
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func Go(f func() error) chan error {
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ch := make(chan error)
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go func() {
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ch <- f()
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}()
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return ch
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}
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// if os.env DEBUG set, debug is on
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func Debugf(format string, a ...interface{}) {
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if os.Getenv("DEBUG") != "" {
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_, file, line, ok := runtime.Caller(1)
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if !ok {
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file = "<unknown>"
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line = -1
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} else {
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file = filepath.Base(file)
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}
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fmt.Fprintf(os.Stderr, fmt.Sprintf("[debug] %s:%d %s\n", file, line, format), a...)
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}
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}
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