Add list command

list_cmd.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"github.com/google/subcommands"
+	"io"
+	"os"
+)
+
+type listCmd struct {
+}
+
+func (cmd *listCmd) SetFlags(f *flag.FlagSet) {
+}
+
+func (*listCmd) Name() string     { return "list" }
+func (*listCmd) Synopsis() string { return "List pages with name and title." }
+func (*listCmd) Usage() string {
+	return `list:
+  List all pages with name and title, separated by a tabulator.
+`
+}
+
+func (cmd *listCmd) Execute(_ context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
+	return listCli(os.Stdout, f.Args())
+}
+
+// listCli runs the list command on the command line. It is used
+// here with an io.Writer for easy testing.
+func listCli(w io.Writer, args []string) subcommands.ExitStatus {
+	index.load()
+	index.RLock()
+	defer index.RUnlock()
+	for name, title := range index.titles {
+		fmt.Fprintf(w, "%s\t%s\n", name, title)
+	}
+	return subcommands.ExitSuccess
+}

wiki.go

@@ -126,6 +126,7 @@ func commands() {
 	subcommands.Register(subcommands.FlagsCommand(), "")
 	subcommands.Register(subcommands.CommandsCommand(), "")
 	subcommands.Register(&htmlCmd{}, "")
+	subcommands.Register(&listCmd{}, "")
 	subcommands.Register(&staticCmd{}, "")
 	subcommands.Register(&searchCmd{}, "")
 	subcommands.Register(&replaceCmd{}, "")