Add proof of concept server ls comand

cli/server.go

@@ -2,6 +2,10 @@ package cli
 
 import (
 	"fmt"
+    "io/ioutil"
+    "os"
+    "os/exec"
+    "log"
 
 	"github.com/urfave/cli/v2"
 )
@@ -12,6 +16,27 @@ var serverListCommand = &cli.Command{
 	Usage:     "List locally-defined servers.",
 	ArgsUsage: emptyArgsUsage,
 	HideHelp:  true,
+    Action: func(c *cli.Context) error {
+        abradir := os.Getenv("HOME") + "/.abra"
+
+        servers, err := ioutil.ReadDir(abradir + "/servers")
+        if err != nil {
+            log.Fatal(err)
+        }
+        fmt.Println("\033[33mLoading status from", len(servers), "server(s), patience advised...\033[0m")
+        fmt.Println(len(servers), "servers:\n")
+        fmt.Println("  NAME\tCONNECTION")
+        fmt.Println("  --\t--")
+        for _, s := range servers {
+            conn, err := exec.Command("docker", "context", "inspect", s.Name(), "-f", "{{.Endpoints.docker.Host}}").Output()
+            if err != nil {
+                log.Fatal(err)
+            }
+            fmt.Printf("  %s\t%s\n", s.Name(), string(conn))
+        }
+
+        return nil
+    },
 }
 
 var serverAddCommand = &cli.Command{