84f8c0cc1f
This commit adds many comments and removes unused code. It also removes the EmptyHash function, which had some uses but was silly.
50 lines
1.5 KiB
Go
50 lines
1.5 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package common
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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)
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// MakeName creates a node name that follows the ethereum convention
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// for such names. It adds the operation system name and Go runtime version
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// the name.
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func MakeName(name, version string) string {
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return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version())
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}
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// FileExist checks if a file exists at filePath.
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func FileExist(filePath string) bool {
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_, err := os.Stat(filePath)
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if err != nil && os.IsNotExist(err) {
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return false
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}
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return true
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}
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// AbsolutePath returns datadir + filename, or filename if it is absolute.
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func AbsolutePath(datadir string, filename string) string {
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if filepath.IsAbs(filename) {
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return filename
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}
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return filepath.Join(datadir, filename)
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}
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