github.com/ethereum/go-ethereum@v1.14.3/internal/version/vcs.go (about)

     1  // Copyright 2022 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package version
    18  
    19  import (
    20  	"runtime/debug"
    21  	"time"
    22  )
    23  
    24  // In go 1.18 and beyond, the go tool embeds VCS information into the build.
    25  
    26  const (
    27  	govcsTimeLayout = "2006-01-02T15:04:05Z"
    28  	ourTimeLayout   = "20060102"
    29  )
    30  
    31  // buildInfoVCS returns VCS information of the build.
    32  func buildInfoVCS(info *debug.BuildInfo) (s VCSInfo, ok bool) {
    33  	for _, v := range info.Settings {
    34  		switch v.Key {
    35  		case "vcs.revision":
    36  			s.Commit = v.Value
    37  		case "vcs.modified":
    38  			if v.Value == "true" {
    39  				s.Dirty = true
    40  			}
    41  		case "vcs.time":
    42  			t, err := time.Parse(govcsTimeLayout, v.Value)
    43  			if err == nil {
    44  				s.Date = t.Format(ourTimeLayout)
    45  			}
    46  		}
    47  	}
    48  	if s.Commit != "" && s.Date != "" {
    49  		ok = true
    50  	}
    51  	return
    52  }