core: move build version reading to its own package (#25806)

This fixes the build with Go 1.17, which does not have BuildInfo.Settings yet.

core/blockchain.go

@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"io"
 	"math/big"
+	"runtime"
 	"sort"
 	"strings"
 	"sync"
@@ -40,6 +41,7 @@ import (
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/internal/syncx"
+	"github.com/ethereum/go-ethereum/internal/version"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/params"
@@ -2378,6 +2380,31 @@ func (bc *BlockChain) reportBlock(block *types.Block, receipts types.Receipts, e
 	log.Error(summarizeBadBlock(block, receipts, bc.Config(), err))
 }
 
+// summarizeBadBlock returns a string summarizing the bad block and other
+// relevant information.
+func summarizeBadBlock(block *types.Block, receipts []*types.Receipt, config *params.ChainConfig, err error) string {
+	var receiptString string
+	for i, receipt := range receipts {
+		receiptString += fmt.Sprintf("\n  %d: cumulative: %v gas: %v contract: %v status: %v tx: %v logs: %v bloom: %x state: %x",
+			i, receipt.CumulativeGasUsed, receipt.GasUsed, receipt.ContractAddress.Hex(),
+			receipt.Status, receipt.TxHash.Hex(), receipt.Logs, receipt.Bloom, receipt.PostState)
+	}
+	version, vcs := version.Info()
+	platform := fmt.Sprintf("%s %s %s %s", version, runtime.Version(), runtime.GOARCH, runtime.GOOS)
+	if vcs != "" {
+		vcs = fmt.Sprintf("\nVCS: %s", vcs)
+	}
+	return fmt.Sprintf(`
+########## BAD BLOCK #########
+Block: %v (%#x)
+Error: %v
+Platform: %v%v
+Chain config: %#v
+Receipts: %v
+##############################
+`, block.Number(), block.Hash(), err, platform, vcs, config, receiptString)
+}
+
 // InsertHeaderChain attempts to insert the given header chain in to the local
 // chain, possibly creating a reorg. If an error is returned, it will return the
 // index number of the failing header as well an error describing what went wrong.

internal/version/vcs_fallback.go

@@ -0,0 +1,28 @@
+// Copyright 2022 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+//go:build !go1.18
+// +build !go1.18
+
+package version
+
+import "runtime/debug"
+
+// In Go versions before 1.18, VCS information is not available.
+
+func vcsInfo(info *debug.BuildInfo) (gitStatus, bool) {
+	return gitStatus{}, false
+}

internal/version/vcs_go1.18.go

@@ -0,0 +1,48 @@
+// Copyright 2022 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+//go:build go1.18
+// +build go1.18
+
+package version
+
+import "runtime/debug"
+
+// In go 1.18 and beyond, the go tool embeds VCS information into the build.
+
+// vcsInfo returns VCS information of the build.
+func vcsInfo(info *debug.BuildInfo) (s gitStatus, ok bool) {
+	for _, v := range info.Settings {
+		switch v.Key {
+		case "vcs.revision":
+			if len(v.Value) < 8 {
+				s.revision = v.Value
+			} else {
+				s.revision = v.Value[:8]
+			}
+		case "vcs.modified":
+			if v.Value == "true" {
+				s.modified = true
+			}
+		case "vcs.time":
+			s.time = v.Value
+		}
+	}
+	if s.revision != "" && s.time != "" {
+		ok = true
+	}
+	return
+}

internal/version/version.go

@@ -14,70 +14,48 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-package core
+// Package version implements reading of build version information.
+package version
 
 import (
 	"fmt"
-	"runtime"
 	"runtime/debug"
 	"strings"
 
-	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/params"
 )
 
 const ourPath = "github.com/ethereum/go-ethereum" // Path to our module
 
-// summarizeBadBlock returns a string summarizing the bad block and other
-// relevant information.
-func summarizeBadBlock(block *types.Block, receipts []*types.Receipt, config *params.ChainConfig, err error) string {
-	var receiptString string
-	for i, receipt := range receipts {
-		receiptString += fmt.Sprintf("\n  %d: cumulative: %v gas: %v contract: %v status: %v tx: %v logs: %v bloom: %x state: %x",
-			i, receipt.CumulativeGasUsed, receipt.GasUsed, receipt.ContractAddress.Hex(),
-			receipt.Status, receipt.TxHash.Hex(), receipt.Logs, receipt.Bloom, receipt.PostState)
-	}
-	version, vcs := runtimeInfo()
-	platform := fmt.Sprintf("%s %s %s %s", version, runtime.Version(), runtime.GOARCH, runtime.GOOS)
-	if vcs != "" {
-		vcs = fmt.Sprintf("\nVCS: %s", vcs)
-	}
-	return fmt.Sprintf(`
-########## BAD BLOCK #########
-Block: %v (%#x)
-Error: %v
-Platform: %v%v
-Chain config: %#v
-Receipts: %v
-##############################
-`, block.Number(), block.Hash(), err, platform, vcs, config, receiptString)
-}
-
 // runtimeInfo returns build and platform information about the current binary.
 //
 // If the package that is currently executing is a prefixed by our go-ethereum
 // module path, it will print out commit and date VCS information. Otherwise,
 // it will assume it's imported by a third-party and will return the imported
 // version and whether it was replaced by another module.
-func runtimeInfo() (string, string) {
-	var (
-		version       = params.VersionWithMeta
-		vcs           = ""
-		buildInfo, ok = debug.ReadBuildInfo()
-	)
-	if ok {
-		version = versionInfo(buildInfo)
-		if status, ok := vcsInfo(buildInfo); ok {
-			modified := ""
-			if status.modified {
-				modified = " (dirty)"
-			}
-			vcs = status.revision + "-" + status.time + modified
+func Info() (version, vcs string) {
+	version = params.VersionWithMeta
+	buildInfo, ok := debug.ReadBuildInfo()
+	if !ok {
+		return version, ""
+	}
+	version = versionInfo(buildInfo)
+	if status, ok := vcsInfo(buildInfo); ok {
+		modified := ""
+		if status.modified {
+			modified = " (dirty)"
 		}
+		vcs = status.revision + "-" + status.time + modified
 	}
 	return version, vcs
 }
 
+type gitStatus struct {
+	revision string
+	time     string
+	modified bool
+}
+
 // versionInfo returns version information for the currently executing
 // implementation.
 //
@@ -113,36 +91,6 @@ func versionInfo(info *debug.BuildInfo) string {
 	return version
 }
 
-type status struct {
-	revision string
-	time     string
-	modified bool
-}
-
-// vcsInfo returns VCS information of the build.
-func vcsInfo(info *debug.BuildInfo) (s status, ok bool) {
-	for _, v := range info.Settings {
-		switch v.Key {
-		case "vcs.revision":
-			if len(v.Value) < 8 {
-				s.revision = v.Value
-			} else {
-				s.revision = v.Value[:8]
-			}
-		case "vcs.modified":
-			if v.Value == "true" {
-				s.modified = true
-			}
-		case "vcs.time":
-			s.time = v.Value
-		}
-	}
-	if s.revision != "" && s.time != "" {
-		ok = true
-	}
-	return
-}
-
 // findModule returns the module at path.
 func findModule(info *debug.BuildInfo, path string) *debug.Module {
 	if info.Path == ourPath {