Merge pull request goodhosts#3 from goodhosts/backup-restore

added backup, restore and edit

cmd/add.go

@@ -1,9 +1,9 @@
 package cmd
 
 import (
-	"fmt"
 	"strings"
 
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -21,7 +21,7 @@ func add(c *cli.Context) error {
 	args := c.Args()
 
 	if args.Len() < 2 {
-		fmt.Println("Adding an entry requires an ip and a hostname.")
+		logrus.Infof("adding a hostsfile entry requires an ip and a hostname.")
 		return nil
 	}
 
@@ -47,11 +47,12 @@ func add(c *cli.Context) error {
 		return cli.NewExitError(err.Error(), 2)
 	}
 
+	logrus.Debugln("flushing hosts file to disk")
 	err = hostsfile.Flush()
 	if err != nil {
 		return cli.NewExitError(err.Error(), 2)
 	}
 
-	fmt.Printf("Added: %s %s\n", ip, strings.Join(hostEntries, " "))
-	return nil
+	logrus.Infof("hosts entry added: %s %s\n", ip, strings.Join(hostEntries, " "))
+	return debugFooter(c)
 }

cmd/backup.go

@@ -1,8 +1,9 @@
 package cmd
 
 import (
-	"fmt"
+	"path/filepath"
 
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -22,6 +23,22 @@ func Backup() *cli.Command {
 }
 
 func backup(c *cli.Context) error {
-	fmt.Println("todo")
+	hostsfile, err := loadHostsfile(c)
+	if err != nil {
+		return err
+	}
+
+	output := c.String("output")
+	if output == "" {
+		output = filepath.Join(
+			filepath.Dir(hostsfile.Path),
+			"."+filepath.Base(hostsfile.Path))
+	}
+
+	_, err = copyFile(hostsfile.Path, output)
+	if err != nil {
+		return err
+	}
+	logrus.Infof("backup complete")
 	return debugFooter(c)
 }

cmd/check.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net"
 
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -18,7 +19,7 @@ func Check() *cli.Command {
 }
 func check(c *cli.Context) error {
 	if c.Args().Len() < 1 {
-		fmt.Println("No input, pass an ip address or hostname to check.")
+		logrus.Infof("No input, pass an ip address or hostname to check.")
 		return nil
 	}
 
@@ -30,13 +31,13 @@ func check(c *cli.Context) error {
 
 	if net.ParseIP(input) != nil {
 		if hostsfile.HasIp(input) {
-			fmt.Printf("%s exists in hosts life\n", input)
+			logrus.Infof("%s exists in hosts file\n", input)
 			return nil
 		}
 	}
 
 	if hostsfile.HasHostname(input) {
-		fmt.Printf("%s exists in hosts life\n", input)
+		logrus.Infof("%s exists in hosts file\n", input)
 		return nil
 	}
 

cmd/edit.go

@@ -0,0 +1,38 @@
+package cmd
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/urfave/cli/v2"
+)
+
+func Edit() *cli.Command {
+	return &cli.Command{
+		Name:    "edit",
+		Aliases: []string{"e"},
+		Usage:   "Open hosts file in an editor, default vim",
+		Action:  edit,
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:    "editor",
+				Aliases: []string{"e"},
+				Usage:   "Which file editor to use, defaults vim",
+				Value:   "vim",
+			},
+		},
+	}
+}
+
+func edit(c *cli.Context) error {
+	hostsfile, err := loadHostsfile(c)
+	if err != nil {
+		return err
+	}
+
+	cmd := exec.Command(c.String("editor"), hostsfile.Path)
+	cmd.Stdout = os.Stdout
+	cmd.Stdin = os.Stdin
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}

cmd/list.go

@@ -3,6 +3,7 @@ package cmd
 import (
 	"fmt"
 
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -14,8 +15,9 @@ func List() *cli.Command {
 		Action:  list,
 		Flags: []cli.Flag{
 			&cli.BoolFlag{
-				Name:  "all",
-				Usage: "Show all entries in the hosts file including commented lines.",
+				Name:    "all",
+				Aliases: []string{"a"},
+				Usage:   "Show all entries in the hosts file including commented lines.",
 			},
 		},
 	}
@@ -39,7 +41,7 @@ func list(c *cli.Context) error {
 			lineOutput = fmt.Sprintf("%s # <<< Malformed!", lineOutput)
 		}
 
-		fmt.Println(lineOutput)
+		logrus.Infof(lineOutput)
 	}
 
 	return debugFooter(c)

cmd/main.go

@@ -2,10 +2,12 @@ package cmd
 
 import (
 	"fmt"
+	"io"
 	"os"
 
 	"github.com/goodhosts/hostsfile"
 	"github.com/olekukonko/tablewriter"
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -22,6 +24,7 @@ func Commands() []*cli.Command {
 		Debug(),
 		Backup(),
 		Restore(),
+		Edit(),
 	}
 }
 
@@ -30,13 +33,15 @@ func DefaultAction(c *cli.Context) error {
 }
 
 func loadHostsfile(c *cli.Context) (hostsfile.Hosts, error) {
-	customHostsfile := c.String("custom")
+	customHostsfile := c.String("file")
 	var hfile hostsfile.Hosts
 	var err error
 
 	if customHostsfile != "" {
+		logrus.Debugf("loading custom hosts file: %s\n", customHostsfile)
 		hfile, err = hostsfile.NewCustomHosts(customHostsfile)
 	} else {
+		logrus.Debugf("loading default hosts file: %s\n", hostsfile.HostsFilePath)
 		hfile, err = hostsfile.NewHosts()
 	}
 
@@ -61,7 +66,7 @@ func debugFooter(c *cli.Context) error {
 		return err
 	}
 
-	fmt.Printf("%s\n", hostsfile.Path)
+	logrus.Infof("hosts file path: %s\n", hostsfile.Path)
 
 	var comments, empty, entry, malformed int
 	for _, line := range hostsfile.Lines {
@@ -101,3 +106,30 @@ func debugFooter(c *cli.Context) error {
 
 	return nil
 }
+
+func copyFile(src, dst string) (int64, error) {
+	logrus.Debugf("copying file: src %s, dst %s",
+		src, dst)
+	sourceFileStat, err := os.Stat(src)
+	if err != nil {
+		return 0, err
+	}
+
+	if !sourceFileStat.Mode().IsRegular() {
+		return 0, fmt.Errorf("%s is not a regular file", src)
+	}
+
+	source, err := os.Open(src)
+	if err != nil {
+		return 0, err
+	}
+	defer source.Close()
+
+	destination, err := os.Create(dst)
+	if err != nil {
+		return 0, err
+	}
+	defer destination.Close()
+	nBytes, err := io.Copy(destination, source)
+	return nBytes, err
+}

cmd/remove.go

@@ -1,11 +1,11 @@
 package cmd
 
 import (
-	"fmt"
 	"net"
 	"strings"
 
 	"github.com/goodhosts/hostsfile"
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -26,7 +26,7 @@ func remove(c *cli.Context) error {
 	}
 
 	if args.Len() == 0 {
-		return cli.NewExitError("No input.", 1)
+		return cli.NewExitError("no input", 1)
 	}
 
 	if args.Len() == 1 { //could be ip or hostname
@@ -63,13 +63,13 @@ func remove(c *cli.Context) error {
 		return cli.NewExitError(err.Error(), 2)
 	}
 
-	fmt.Printf("Removed: %s\n", strings.Join(hostEntries, " "))
-	return nil
+	logrus.Infof("entry removed: %s\n", strings.Join(hostEntries, " "))
+	return debugFooter(c)
 }
 
 func processSingleArg(hostsfile hostsfile.Hosts, arg string) error {
 	if net.ParseIP(arg) != nil {
-		fmt.Printf("Removing ip %s\n", arg)
+		logrus.Infof("removing ip %s\n", arg)
 		if err := hostsfile.RemoveByIp(arg); err != nil {
 			return err
 		}
@@ -80,7 +80,7 @@ func processSingleArg(hostsfile hostsfile.Hosts, arg string) error {
 		return nil
 	}
 
-	fmt.Printf("Removing hostname %s\n", arg)
+	logrus.Infof("removing hostname %s\n", arg)
 
 	if err := hostsfile.RemoveByHostname(arg); err != nil {
 		return err

cmd/restore.go

@@ -1,8 +1,9 @@
 package cmd
 
 import (
-	"fmt"
+	"path/filepath"
 
+	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli/v2"
 )
 
@@ -14,14 +15,31 @@ func Restore() *cli.Command {
 		Flags: []cli.Flag{
 			&cli.StringFlag{
 				Name:    "input",
-				Aliases: []string{"o"},
+				Aliases: []string{"i"},
 				Usage:   "File location to restore a backup from, default <hostsdir>/.hosts",
 			},
 		},
 	}
 }
 
 func restore(c *cli.Context) error {
-	fmt.Println("todo")
+	hostsfile, err := loadHostsfile(c)
+	if err != nil {
+		// debug only, no problem if file doesn't exist we just need path
+		logrus.Debugf("destination hosts file not found: %s", hostsfile.Path)
+	}
+
+	input := c.String("input")
+	if input == "" {
+		input = filepath.Join(
+			filepath.Dir(hostsfile.Path),
+			"."+filepath.Base(hostsfile.Path))
+	}
+
+	_, err = copyFile(input, hostsfile.Path)
+	if err != nil {
+		return err
+	}
+
 	return debugFooter(c)
 }