github.com/ava-labs/subnet-evm@v0.6.4/internal/version/vcs.go (about)

     1  // (c) 2023, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2022 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  package version
    28  
    29  import (
    30  	"runtime/debug"
    31  	"time"
    32  )
    33  
    34  // In go 1.18 and beyond, the go tool embeds VCS information into the build.
    35  
    36  const (
    37  	govcsTimeLayout = "2006-01-02T15:04:05Z"
    38  	ourTimeLayout   = "20060102"
    39  )
    40  
    41  // buildInfoVCS returns VCS information of the build.
    42  func buildInfoVCS(info *debug.BuildInfo) (s VCSInfo, ok bool) {
    43  	for _, v := range info.Settings {
    44  		switch v.Key {
    45  		case "vcs.revision":
    46  			s.Commit = v.Value
    47  		case "vcs.modified":
    48  			if v.Value == "true" {
    49  				s.Dirty = true
    50  			}
    51  		case "vcs.time":
    52  			t, err := time.Parse(govcsTimeLayout, v.Value)
    53  			if err == nil {
    54  				s.Date = t.Format(ourTimeLayout)
    55  			}
    56  		}
    57  	}
    58  	if s.Commit != "" && s.Date != "" {
    59  		ok = true
    60  	}
    61  	return
    62  }