update go.mod in temp, if it has relative replace

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/tongjingran/copy v1.4.2 // indirect
 	go.uber.org/multierr v1.6.0 // indirect
 	go.uber.org/zap v1.16.0
+	golang.org/x/mod v0.4.2
 	golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57 // indirect
 	k8s.io/kubectl v0.20.5 // indirect
 )

go.sum

@@ -446,6 +446,8 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2 h1:Gz96sIWK3OalVv/I/qNygP42zyoKp3xptRVCWRFEBvo=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -581,6 +583,7 @@ golang.org/x/tools v0.0.0-20200616133436-c1934b75d054/go.mod h1:EkVYQZoAsY45+roY
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
 google.golang.org/api v0.7.0/go.mod h1:WtwebWUNSVBH/HAw79HIFXZNqEvBhG+Ra+ax0hx3E3M=

pkg/build/tmpfolder.go

@@ -3,12 +3,15 @@ package build
 import (
 	"crypto/sha256"
 	"fmt"
+	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/qiniu/goc/v2/pkg/config"
 	"github.com/qiniu/goc/v2/pkg/log"
 	"github.com/tongjingran/copy"
+	"golang.org/x/mod/modfile"
 )
 
 // copyProjectToTmp copies project files to the temporary directory
@@ -73,3 +76,55 @@ func (b *Build) clean() {
 		log.Debugf("--debug is enabled, keep the temporary project")
 	}
 }
+
+// updateGoModFile rewrites the go.mod file in the temporary directory,
+//
+// if it has a 'replace' directive, and the directive has a relative local path,
+// it will be rewritten with a absolute path.
+//
+// ex.
+//
+// suppose original project is located at /path/to/aa/bb/cc, go.mod contains a directive:
+// 'replace github.com/qiniu/bar => ../home/foo/bar'
+//
+// after the project is copied to temporary directory, it should be rewritten as
+// 'replace github.com/qiniu/bar => /path/to/aa/bb/home/foo/bar'
+func (b *Build) updateGoModFile() (updateFlag bool, newModFile []byte) {
+	tempModfile := filepath.Join(config.GocConfig.TmpModProjectDir, "go.mod")
+	buf, err := ioutil.ReadFile(tempModfile)
+	if err != nil {
+		log.Fatalf("cannot find go.mod file in temporary directory: %v", err)
+	}
+	oriGoModFile, err := modfile.Parse(tempModfile, buf, nil)
+	if err != nil {
+		log.Fatalf("cannot parse go.mod: %v", err)
+	}
+
+	updateFlag = false
+	for index := range oriGoModFile.Replace {
+		replace := oriGoModFile.Replace[index]
+		oldPath := replace.Old.Path
+		oldVersion := replace.Old.Version
+		newPath := replace.New.Path
+		newVersion := replace.New.Version
+		// replace to a local filesystem does not have a version
+		// absolute path no need to rewrite
+		if newVersion == "" && !filepath.IsAbs(newPath) {
+			var absPath string
+			fullPath := filepath.Join(config.GocConfig.CurModProjectDir, newPath)
+			absPath, _ = filepath.Abs(fullPath)
+			// DropReplace & AddReplace will not return error
+			// so no need to check the error
+			_ = oriGoModFile.DropReplace(oldPath, oldVersion)
+			_ = oriGoModFile.AddReplace(oldPath, oldVersion, absPath, newVersion)
+			updateFlag = true
+		}
+	}
+	oriGoModFile.Cleanup()
+	// Format will not return error, so ignore the returned error
+	// func (f *File) Format() ([]byte, error) {
+	//     return Format(f.Syntax), nil
+	// }
+	newModFile, _ = oriGoModFile.Format()
+	return
+}