Implement prune

cmd/prune.go

@@ -1,6 +1,10 @@
 package cmd
 
 import (
+	"os"
+
+	"github.com/apex/log"
+	"github.com/marcosnils/bin/pkg/config"
 	"github.com/spf13/cobra"
 )
 
@@ -21,8 +25,17 @@ func newPruneCmd() *pruneCmd {
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		RunE: func(cmd *cobra.Command, args []string) error {
-			//TODO implement prune
-			return nil
+			cfg := config.Get()
+
+			pathsToDel := []string{}
+			for _, b := range cfg.Bins {
+				if _, err := os.Stat(b.Path); os.IsNotExist(err) {
+					log.Infof("%s not found removing", b.Path)
+					pathsToDel = append(pathsToDel, b.Path)
+				}
+			}
+
+			return config.RemoveBinaries(pathsToDel)
 		},
 	}
 

pkg/config/config.go

@@ -59,6 +59,28 @@ func AddBinary(c *Binary) error {
 	return nil
 }
 
+// RemoveBinaries removes the specified paths
+// from bin configuration. It doesn't care about the order
+func RemoveBinaries(paths []string) error {
+	if len(paths) > 0 {
+		k := 0
+		for _, cb := range cfg.Bins {
+			for _, p := range paths {
+				if cb.Path != p {
+					cfg.Bins[k] = cb
+					k++
+				}
+			}
+		}
+
+		cfg.Bins = cfg.Bins[:k]
+
+		return write()
+	}
+
+	return nil
+}
+
 func write() error {
 	u, _ := user.Current()
 	f, err := os.OpenFile(filepath.Join(u.HomeDir, ".bin/config.json"), os.O_RDWR|os.O_CREATE, 0666)