/
use.go
85 lines (74 loc) · 1.64 KB
/
use.go
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package cmd
import (
"fmt"
"os"
"github.com/spf13/cobra"
bolt "go.etcd.io/bbolt"
)
// useCmd represents the use command.
var useCmd = &cobra.Command{
Use: "use",
Short: "specify the version of golang to use",
Long: `specify the version of golang to use
# To use go1.19 as the default
$ gvm use go1.19
`,
SilenceErrors: true,
SilenceUsage: true,
RunE: func(cmd *cobra.Command, args []string) error {
if len(args) == 1 {
if err := setGoVersion(args[0]); err != nil {
return err
}
}
return nil
},
}
func init() {
rootCmd.AddCommand(useCmd)
}
func setGoVersion(version string) error {
// check if valid installed version
ok, err := checkVersionInstalled(version)
if err != nil {
return err
}
if !ok {
return fmt.Errorf("specified version: %s is not installed", version)
}
// symlink to GoPath
os.Remove(GoPath)
if err := os.Symlink(fmt.Sprintf("%v/%v/go", GoInstallationDirectory, version), GoPath); err != nil {
return err
}
// update DB
versions := [][]byte{}
if err := DB.View(func(tx *bolt.Tx) error {
bucket := tx.Bucket([]byte(DBBucketName))
if bucket == nil {
return fmt.Errorf("bucket %v not found", DBBucketName)
}
return bucket.ForEach(func(v, _ []byte) error {
versions = append(versions, v)
return nil
})
}); err != nil {
return err
}
return DB.Update(func(tx *bolt.Tx) error {
bucket, err := tx.CreateBucketIfNotExists([]byte(DBBucketName))
if err != nil {
return err
}
for _, v := range versions {
value := ""
if version == string(v) {
value = DEFAULT
}
if err := bucket.Put(v, []byte(value)); err != nil {
return err
}
}
return nil
})
}