/
main.go
124 lines (96 loc) · 2.43 KB
/
main.go
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// Package main constructs the conflate library main functionality.
package main
import (
"flag"
"fmt"
"io"
"os"
"strings"
"github.com/miracl/conflate"
)
var version = "devel"
func failIfError(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
//nolint:funlen // that's ok
func main() {
var data dataFlag
flag.Var(&data, "data", "The path/url of JSON/YAML/TOML data, or 'stdin' to read from standard input")
schemaFile := flag.String("schema", "", "The path/url of a JSON v4 schema file")
defaults := flag.Bool("defaults", false, "Apply defaults from schema to data")
validate := flag.Bool("validate", false, "Validate the data against the schema")
format := flag.String("format", "", "Output format of the data JSON/YAML/TOML")
includes := flag.String("includes", "includes", "Name of includes array. Blank string suppresses expansion of includes arrays")
noincludes := flag.Bool("noincludes", false, "Switches off conflation of includes. Overrides any --includes setting.")
expand := flag.Bool("expand", false, "Expand environment variables in files")
showVersion := flag.Bool("version", false, "Display the version number")
flag.Parse()
if *showVersion {
fmt.Println(version)
return
}
conflate.Includes = *includes
if *noincludes {
conflate.Includes = ""
}
c := conflate.New()
c.Expand(*expand)
if len(data) == 0 {
data = append(data, "stdin")
}
for _, d := range data {
if d == "stdin" {
b, err := io.ReadAll(os.Stdin)
failIfError(err)
err = c.AddData(b)
failIfError(err)
} else {
err := c.AddFiles(d)
failIfError(err)
}
}
var schema *conflate.Schema
if *schemaFile != "" {
s, err := conflate.NewSchemaFile(*schemaFile)
failIfError(err)
schema = s
}
if *defaults {
err := c.ApplyDefaults(schema)
failIfError(err)
}
if *validate {
err := c.Validate(schema)
failIfError(err)
}
if *format != "" {
var data interface{}
err := c.Unmarshal(&data)
failIfError(err)
var out []byte
switch strings.ToUpper(*format) {
case "JSON":
out, err = c.MarshalJSON()
case "YAML":
out, err = c.MarshalYAML()
case "TOML":
out, err = c.MarshalTOML()
}
failIfError(err)
_, err = os.Stdout.Write(out)
if err != nil {
fmt.Printf("err when formatting: %v", err.Error())
}
}
}
type dataFlag []string
func (f *dataFlag) String() string {
return strings.Join(*f, ",")
}
func (f *dataFlag) Set(value string) error {
*f = append(*f, value)
return nil
}