mirror of
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82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
package main
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import (
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"io"
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"github.com/spf13/cobra"
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"github.com/spf13/viper"
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)
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func listCommand() (*cobra.Command, error) {
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cmd := &cobra.Command{
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Use: "list",
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Short: "List all Emacs versions found in " +
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"`$EVM_ROOT/versions/*'",
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Aliases: []string{"ls", "versions"},
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Args: cobra.ExactArgs(0),
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ValidArgsFunction: listValidArgs,
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RunE: listRunE,
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}
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cmd.Flags().StringP("format", "f", "", "output format (yaml or json)")
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err := viper.BindPFlag("list.format", cmd.Flags().Lookup("format"))
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if err != nil {
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return nil, err
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}
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return cmd, nil
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}
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func listRunE(cmd *cobra.Command, _ []string) error {
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conf, err := getConfig()
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if err != nil {
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return err
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}
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format := viper.GetString("list.format")
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versions, err := newEmacsVersions(conf)
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if err != nil {
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return err
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}
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results := &listResults{
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Current: conf.Current.Version,
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Versions: versions,
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}
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return render(cmd.OutOrStdout(), format, results)
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}
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func listValidArgs(
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_ *cobra.Command,
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args []string,
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toComplete string,
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) ([]string, cobra.ShellCompDirective) {
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return nil, cobra.ShellCompDirectiveNoFileComp
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}
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type listResults struct {
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Current string `yaml:"current" json:"current"`
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Versions emacsVersions `yaml:"versions" json:"versions"`
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}
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func (lr *listResults) WriteTo(w io.Writer) (int64, error) {
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var b []byte
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for _, ver := range lr.Versions {
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if lr.Current == ver.Version {
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b = append(b, []byte("* ")...)
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} else {
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b = append(b, []byte(" ")...)
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}
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b = append(b, []byte(ver.Version)...)
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b = append(b, byte('\n'))
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}
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n, err := w.Write(b)
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return int64(n), err
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}
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