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package main
import (
"encoding/json"
"errors"
"fmt"
"log"
"os"
"gopkg.in/yaml.v2"
"github.com/ashcrow/osrelease"
"github.com/spf13/cobra"
)
// version of the build
var version string
// latest git commit in this build
var gitCommit string
// when the build occured
var buildInfo string
// main is the main entry point for executing the CLI
func main() {
// The OSRelease instance to use in commands
or, err := osrelease.New()
if err != nil {
log.Fatalln(err)
}
// root command which doesn't do anything but show help
var rootCommand = &cobra.Command{
Use: "osrelease",
Short: "osrelease parses and provides osrelease data",
RunE: func(cmd *cobra.Command, args []string) error {
return errors.New("Please specify an output format.")
},
}
// The version number of this build
var versionCommand = &cobra.Command{
Use: "version",
Short: "Print the version number of osrelease",
Run: func(cmd *cobra.Command, args []string) {
fmt.Println(version)
},
}
// The version number of this build
var buildInfoCommand = &cobra.Command{
Use: "buildinfo",
Short: "Print the build information",
Run: func(cmd *cobra.Command, args []string) {
fmt.Printf("Version: %s\n", version)
fmt.Printf("GitCommit: %s\n", gitCommit)
fmt.Printf("BuildInfo: %s\n", buildInfo)
},
}
// command for outputting in json
var jsonCommand = &cobra.Command{
Use: "json",
Short: "Parse and print the file in json format",
Run: func(cmd *cobra.Command, args []string) {
data, err := json.MarshalIndent(or, "", " ")
if err != nil {
log.Fatal(err)
}
fmt.Printf(string(data))
},
}
// command for outputting in YAML
var yamlCommand = &cobra.Command{
Use: "yaml",
Short: "Parse and print the file in yaml format",
Run: func(cmd *cobra.Command, args []string) {
data, err := yaml.Marshal(or)
if err != nil {
log.Fatal(err)
}
fmt.Printf(string(data))
},
}
// command for outputting a single field
var fieldCommand = &cobra.Command{
Use: "field FIELDNAME",
Short: "Parse and print a single field",
Args: func(cmd *cobra.Command, args []string) error {
if len(args) == 1 {
return nil
}
return errors.New("Requires a single field to be provided")
},
Run: func(cmd *cobra.Command, args []string) {
data, err := or.GetField(args[0])
if err != nil {
os.Exit(1)
}
fmt.Printf(string(data))
},
}
// Add our commands
rootCommand.AddCommand(versionCommand, buildInfoCommand, jsonCommand, yamlCommand, fieldCommand)
// Execute
rootCommand.Execute()
}
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