github.com/jimmyx0x/go-ethereum@v1.10.28/internal/version/vcs_go1.18.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  //go:build go1.18
    18  // +build go1.18
    19  
    20  package version
    21  
    22  import (
    23  	"runtime/debug"
    24  	"time"
    25  )
    26  
    27  // In go 1.18 and beyond, the go tool embeds VCS information into the build.
    28  
    29  const (
    30  	govcsTimeLayout = "2006-01-02T15:04:05Z"
    31  	ourTimeLayout   = "20060102"
    32  )
    33  
    34  // buildInfoVCS returns VCS information of the build.
    35  func buildInfoVCS(info *debug.BuildInfo) (s VCSInfo, ok bool) {
    36  	for _, v := range info.Settings {
    37  		switch v.Key {
    38  		case "vcs.revision":
    39  			s.Commit = v.Value
    40  		case "vcs.modified":
    41  			if v.Value == "true" {
    42  				s.Dirty = true
    43  			}
    44  		case "vcs.time":
    45  			t, err := time.Parse(govcsTimeLayout, v.Value)
    46  			if err == nil {
    47  				s.Date = t.Format(ourTimeLayout)
    48  			}
    49  		}
    50  	}
    51  	if s.Commit != "" && s.Date != "" {
    52  		ok = true
    53  	}
    54  	return
    55  }