Modify go dependencies and code to be compatible with go1.15

- downgrade viper dependency to be compatible
- remove any native golang calls introduced in 16+
- update version check for cli compilation script
- add license check skip flag in tarball build
			pr-link: Alluxio#18218
			change-id: cid-bc73e4d4a8c6c78a189f213dbb11ddd4b77e5454

build/cli/build-cli.sh

@@ -47,8 +47,8 @@ main() {
     exit 1
   fi
   go_version=$(go version)
-  if [[ ! ${go_version} =~ ^go\ version\ go1\.(18|19|[2-9][0-9]) ]]; then
-    echo "Go version must be 1.18 or later, but got ${go_version}"
+  if [[ ! ${go_version} =~ ^go\ version\ go1\.(1[5-9]|[2-9][0-9]) ]]; then
+    echo "Go version must be 1.15 or later, but got ${go_version}"
     exit 1
   fi
 

cli/src/alluxio.org/cli/processes/common.go

@@ -239,9 +239,15 @@ func getSigner() (ssh.Signer, error) {
 		return nil, stacktrace.Propagate(err, "user home directory not found at %v", homePath)
 	}
 	privateKeyFile := filepath.Join(homePath, ".ssh", "id_rsa")
-	privateKey, err := os.ReadFile(privateKeyFile)
+
+	f, err := os.Open(privateKeyFile)
+	if err != nil {
+		return nil, stacktrace.Propagate(err, "error reading file %v", privateKeyFile)
+	}
+	defer f.Close()
+	privateKey, err := ioutil.ReadAll(f)
 	if err != nil {
-		return nil, stacktrace.Propagate(err, "private key file not found at %v", privateKeyFile)
+		return nil, stacktrace.Propagate(err, "error reading contents of %v", privateKeyFile)
 	}
 	parsedPrivateKey, err := ssh.ParsePrivateKey(privateKey)
 	if err != nil {

cli/src/alluxio.org/go.mod

@@ -1,6 +1,6 @@
 module alluxio.org
 
-go 1.18
+go 1.15
 
 require (
 	github.com/iancoleman/orderedmap v0.3.0
@@ -9,28 +9,9 @@ require (
 	github.com/sirupsen/logrus v1.9.0
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.15.0
-	golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e
-	gopkg.in/yaml.v3 v3.0.1
-)
-
-require (
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
-	github.com/go-ole/go-ole v1.2.6 // indirect
-	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/magiconair/properties v1.8.7 // indirect
-	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
-	github.com/spf13/afero v1.9.3 // indirect
-	github.com/spf13/cast v1.5.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/stretchr/testify v1.8.2 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
-	github.com/tklauser/go-sysconf v0.3.11 // indirect
-	github.com/tklauser/numcpus v0.6.0 // indirect
+	github.com/spf13/viper v1.6.0
+	github.com/tklauser/go-sysconf v0.3.0 // indirect
 	github.com/yusufpapurcu/wmi v1.2.3 // indirect
-	golang.org/x/sys v0.3.0 // indirect
-	golang.org/x/text v0.5.0 // indirect
-	gopkg.in/ini.v1 v1.67.0 // indirect
+	golang.org/x/crypto v0.0.0-20210817164053-32db794688a5
+	gopkg.in/yaml.v3 v3.0.1
 )

dev/scripts/src/alluxio.org/build/artifact/artifact-methods.go

@@ -52,8 +52,13 @@ func (a *ArtifactGroup) WriteToFile(outputFile string) error {
 	if err != nil {
 		return stacktrace.Propagate(err, "error marshalling artifact to yaml")
 	}
-	if err := os.WriteFile(outputFile, yOut, os.ModePerm); err != nil {
-		return stacktrace.Propagate(err, "error writing to file")
+	f, err := os.OpenFile(outputFile, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.ModePerm)
+	if err != nil {
+		return stacktrace.Propagate(err, "error opening file %v", outputFile)
+	}
+	defer f.Close()
+	if _, err = f.Write(yOut); err != nil {
+		return stacktrace.Propagate(err, "error writing to file %v", outputFile)
 	}
 	return nil
 }

dev/scripts/src/alluxio.org/build/cmd/build.go

@@ -221,6 +221,7 @@ func ConstructMavenCmd(mvnArgs []string) string {
 		"-Dfindbugs.skip",        // skip findbugs static analysis check
 		"-Dmaven.javadoc.skip",   // skip javadoc generation
 		"-Dcheckstyle.skip",      // skip checkstyle static check
+		"-Dlicense.skip",         // skip license header static check
 		"-Prelease",              // release profile specified in root pom.xml, to build dependency-reduced-pom.xml generated by shading plugin
 		"-Dhttp.keepAlive=false", // disable keep-alive for HTTP requests to deal with connection resets when fetching maven dependencies
 	}

dev/scripts/src/alluxio.org/go.mod

@@ -1,6 +1,6 @@
 module alluxio.org
 
-go 1.18
+go 1.15
 
 require (
 	github.com/palantir/stacktrace v0.0.0-20161112013806-78658fd2d177