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// Copyright 2018 The CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"encoding/json"
"fmt"
"github.com/spf13/cobra"
)
// exportCmd represents the emit command
var exportCmd = &cobra.Command{
Use: "export",
Short: "output data in a standard format",
Long: `export evaluates the configuration found in the current
directory and prints the emit value to stdout.
Examples:
Evaluated and emit
# a single file
cue export config.cue
# multiple files: these are combined at the top-level. Order doesn't matter.
cue export file1.cue foo/file2.cue
# all files within the "mypkg" package: this includes all files in the
# current directory and its ancestor directories that are marked with the
# same package.
cue export -p cloud
# the -p flag can be omitted if the directory only contains files for
# the "mypkg" package.
cue export
Emit value:
For CUE files, the generated configuration is derived from the top-level
single expression, the emit value. For example, the file
// config.cue
arg1: 1
arg2: "my string"
{
a: arg1
b: arg2
}
yields the following JSON:
{
"a": 1,
"b", "my string"
}
In absence of arguments, the current directory is loaded as a package instance.
A package instance for a directory contains all files in the directory and its
ancestor directories, up to the module root, belonging to the same package.
If the package is not explicitly defined by the '-p' flag, it must be uniquely
defined by the files in the current directory.
`,
RunE: func(cmd *cobra.Command, args []string) error {
instances := buildFromArgs(cmd, args)
w := cmd.OutOrStdout()
e := json.NewEncoder(w)
e.SetIndent("", " ")
e.SetEscapeHTML(*escape)
root := instances[0].Value()
err := e.Encode(root)
if err != nil {
fmt.Fprintln(w, err)
}
return nil
},
}
var (
escape *bool
)
func init() {
rootCmd.AddCommand(exportCmd)
exportCmd.Flags().StringP("output", "o", "json", "output format (json only for now)")
escape = exportCmd.Flags().BoolP("escape", "e", false, "use HTML escaping")
}