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db.go
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db.go
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package main
import (
"fmt"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/lxc/lxd/lxd/db/generate/db"
"github.com/lxc/lxd/lxd/db/generate/file"
"github.com/lxc/lxd/lxd/db/generate/lex"
)
// Return a new db command.
func newDb() *cobra.Command {
cmd := &cobra.Command{
Use: "db [sub-command]",
Short: "Database-related code generation.",
RunE: func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("Not implemented")
},
}
cmd.AddCommand(newDbSchema())
cmd.AddCommand(newDbMapper())
// Workaround for subcommand usage errors. See: https://github.com/spf13/cobra/issues/706
cmd.Args = cobra.NoArgs
cmd.Run = func(cmd *cobra.Command, args []string) { cmd.Usage() }
return cmd
}
func newDbSchema() *cobra.Command {
cmd := &cobra.Command{
Use: "schema",
Short: "Generate database schema by applying updates.",
RunE: func(cmd *cobra.Command, args []string) error {
return db.UpdateSchema()
},
}
return cmd
}
func newDbMapper() *cobra.Command {
cmd := &cobra.Command{
Use: "mapper [sub-command]",
Short: "Generate code mapping database rows to Go structs.",
RunE: func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("Not implemented")
},
}
cmd.AddCommand(newDbMapperReset())
cmd.AddCommand(newDbMapperStmt())
cmd.AddCommand(newDbMapperMethod())
return cmd
}
func newDbMapperReset() *cobra.Command {
var target string
cmd := &cobra.Command{
Use: "reset",
Short: "Reset target source file.",
RunE: func(cmd *cobra.Command, args []string) error {
return file.Reset(target, db.Imports)
},
}
flags := cmd.Flags()
flags.StringVarP(&target, "target", "t", "-", "target source file to generate")
return cmd
}
func newDbMapperStmt() *cobra.Command {
var target string
var database string
var pkg string
var entity string
cmd := &cobra.Command{
Use: "stmt [kind]",
Args: cobra.MinimumNArgs(1),
Short: "Generate a particular database statement.",
RunE: func(cmd *cobra.Command, args []string) error {
kind := args[0]
if entity == "" {
return fmt.Errorf("No database entity given")
}
config, err := parseParams(args[1:])
if err != nil {
return err
}
stmt, err := db.NewStmt(database, pkg, entity, kind, config)
if err != nil {
return err
}
return file.Append(target, stmt)
},
}
flags := cmd.Flags()
flags.StringVarP(&target, "target", "t", "-", "target source file to generate")
flags.StringVarP(&database, "database", "d", "cluster", "target database")
flags.StringVarP(&pkg, "package", "p", "api", "Go package where the entity struct is declared")
flags.StringVarP(&entity, "entity", "e", "", "database entity to generate the statement for")
return cmd
}
func newDbMapperMethod() *cobra.Command {
var target string
var database string
var pkg string
var entity string
cmd := &cobra.Command{
Use: "method [kind] [param1=value1 ... paramN=valueN]",
Args: cobra.MinimumNArgs(1),
Short: "Generate a particular transaction method.",
RunE: func(cmd *cobra.Command, args []string) error {
kind := args[0]
if entity == "" {
return fmt.Errorf("No database entity given")
}
config, err := parseParams(args[1:])
if err != nil {
return err
}
method, err := db.NewMethod(database, pkg, entity, kind, config)
if err != nil {
return err
}
return file.Append(target, method)
},
}
flags := cmd.Flags()
flags.StringVarP(&target, "target", "t", "-", "target source file to generate")
flags.StringVarP(&database, "database", "d", "cluster", "target database")
flags.StringVarP(&pkg, "package", "p", "api", "Go package where the entity struct is declared")
flags.StringVarP(&entity, "entity", "e", "", "database entity to generate the method for")
return cmd
}
func parseParams(args []string) (map[string]string, error) {
config := map[string]string{}
for _, arg := range args {
key, value, err := lex.KeyValue(arg)
if err != nil {
return nil, errors.Wrap(err, "Invalid config parameter")
}
config[key] = value
}
return config, nil
}