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39 lines
849 B
39 lines
849 B
8 years ago
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// Copyright 2013, 2014 Canonical Ltd.
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// Licensed under the LGPLv3, see LICENCE file for details.
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package errors
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import (
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"runtime"
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"strings"
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)
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// prefixSize is used internally to trim the user specific path from the
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// front of the returned filenames from the runtime call stack.
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var prefixSize int
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// goPath is the deduced path based on the location of this file as compiled.
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var goPath string
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func init() {
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_, file, _, ok := runtime.Caller(0)
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if file == "?" {
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return
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}
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if ok {
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// We know that the end of the file should be:
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// github.com/juju/errors/path.go
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size := len(file)
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suffix := len("github.com/juju/errors/path.go")
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goPath = file[:size-suffix]
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prefixSize = len(goPath)
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}
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}
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func trimGoPath(filename string) string {
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if strings.HasPrefix(filename, goPath) {
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return filename[prefixSize:]
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}
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return filename
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}
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