gitlab.com/aquachain/aquachain@v1.17.16-rc3.0.20221018032414-e3ddf1e1c055/common/path.go (about)

     1  // Copyright 2018 The aquachain Authors
     2  // This file is part of the aquachain library.
     3  //
     4  // The aquachain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The aquachain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the aquachain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package common
    18  
    19  import (
    20  	"fmt"
    21  	"os"
    22  	"path/filepath"
    23  	"runtime"
    24  	"strings"
    25  )
    26  
    27  func shorten(s string, n int) string {
    28  	l := len(s)
    29  	if l < n {
    30  		return s
    31  	}
    32  	return s[:n]
    33  }
    34  
    35  func ShortGoVersion() string {
    36  	runtimeVersion := runtime.Version()
    37  	// example output: devel go1.20-cc1b20e8ad Sat Sep 17 02:56:51 2022 +0000
    38  	if strings.Contains(runtimeVersion, "devel ") {
    39  		runtimeVersion = strings.TrimPrefix(runtimeVersion, "devel ")
    40  
    41  		runtimeVersion = strings.Replace(runtimeVersion, "go", "godev", -1)
    42  	}
    43  	return shorten(strings.Split(runtimeVersion, "-")[0], 10) // go version
    44  }
    45  
    46  // MakeName creates a node name that follows the aquachain convention
    47  // for such names. It adds the operation system name and Go runtime version
    48  // the name.
    49  func MakeName(name, version string) string {
    50  	return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, ShortGoVersion())
    51  }
    52  
    53  func FileExist(filePath string) bool {
    54  	_, err := os.Stat(filePath)
    55  	if err != nil && os.IsNotExist(err) {
    56  		return false
    57  	}
    58  
    59  	return true
    60  }
    61  
    62  func AbsolutePath(Datadir string, filename string) string {
    63  	if filepath.IsAbs(filename) {
    64  		return filename
    65  	}
    66  	return filepath.Join(Datadir, filename)
    67  }