databricks-cli/cmd/init/init.go

71 lines
1.7 KiB
Go

package init
import (
"encoding/json"
"os"
"path/filepath"
"github.com/databricks/bricks/cmd/root"
"github.com/databricks/bricks/libs/template"
"github.com/spf13/cobra"
)
const ConfigFileName = "config.json"
const SchemaFileName = "schema.json"
const TemplateDirname = "template"
var initCmd = &cobra.Command{
Use: "init",
Short: "Initialize Template",
Long: `Initialize template`,
Args: cobra.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
templateLocation := args[0]
// read the file containing schema for template input parameters
schemaBytes, err := os.ReadFile(filepath.Join(templateLocation, SchemaFileName))
if err != nil {
return err
}
schema := template.Schema{}
err = json.Unmarshal(schemaBytes, &schema)
if err != nil {
return err
}
// read user config to initalize the template with
var config map[string]interface{}
b, err := os.ReadFile(filepath.Join(targetDir, ConfigFileName))
if err != nil {
return err
}
err = json.Unmarshal(b, &config)
if err != nil {
return err
}
// cast any fields that are supported to be integers. The json unmarshalling
// for a generic map converts all numbers to floating point
err = schema.CastFloatToInt(config)
if err != nil {
return err
}
// validate config according to schema
err = schema.ValidateConfig(config)
if err != nil {
return err
}
// materialize the template
return template.WalkFileTree(config, filepath.Join(args[0], TemplateDirname), targetDir)
},
}
var targetDir string
func init() {
initCmd.Flags().StringVar(&targetDir, "target-dir", ".", "path to directory template will be initialized in")
root.RootCmd.AddCommand(initCmd)
}