Allow 'nix' subcommands to provide docs in Markdown format

1 files changed, 4 insertions, 0 deletions

diff --git a/src/libutil/args.hh b/src/libutil/args.hh
index c56044f1d..3c1f87f7e 100644
--- a/src/libutil/args.hh
+++ b/src/libutil/args.hh
@@ -22,6 +22,7 @@ public:
 
     virtual void printHelp(const string & programName, std::ostream & out);
 
+    /* Return a short one-line description of the command. */
     virtual std::string description() { return ""; }
 
 protected:
@@ -221,6 +222,9 @@ struct Command : virtual Args
     virtual void prepare() { };
     virtual void run() = 0;
 
+    /* Return documentation about this command, in Markdown format. */
+    virtual std::string doc() { return ""; }
+
     struct Example
     {
         std::string description;