Do a large chunk of the move to go

This commit moves a huge chunk of the code to go. The TODO.md document
indicates what is left to be done.

cmd/info.go

@@ -0,0 +1,45 @@
+package cmd
+
+import (
+	wisski_distillery "github.com/FAU-CDI/wisski-distillery"
+	"github.com/FAU-CDI/wisski-distillery/env"
+)
+
+// Info is then 'info' command
+var Info wisski_distillery.Command = info{}
+
+type info struct {
+	Positionals struct {
+		Slug string `positional-arg-name:"SLUG" required:"1-1" description:"slug of instance to show info about"`
+	} `positional-args:"true"`
+}
+
+func (info) Description() wisski_distillery.Description {
+	return wisski_distillery.Description{
+		Requirements: env.Requirements{
+			NeedsConfig: true,
+		},
+		Command:     "info",
+		Description: "Provide information about a single repository",
+	}
+}
+
+func (i info) Run(context wisski_distillery.Context) error {
+	instance, err := context.Environment.Instance(i.Positionals.Slug)
+	if err != nil {
+		return err
+	}
+
+	context.Printf("URL:                  %s\n", instance.URL())
+	context.Printf("Base directory:       %s\n", instance.FilesystemBase)
+
+	context.Printf("SQL Database:         %s\n", instance.SqlDatabase)
+	context.Printf("SQL Username:         %s\n", instance.SqlUser)
+	context.Printf("SQL Password:         %s\n", instance.SqlPassword)
+
+	context.Printf("GraphDB Repository:   %s\n", instance.GraphDBRepository)
+	context.Printf("GraphDB Username:     %s\n", instance.GraphDBUser)
+	context.Printf("GraphDB Password:     %s\n", instance.GraphDBPassword)
+
+	return nil
+}