fish: New command: 'supported'

This checks all available optional groups and prints out which
ones are supported by the daemon.  Note you must launch the appliance
first.

Example:

><fs> supported
      augeas yes
     inotify yes
 linuxfsuuid yes
linuxmodules yes
 linuxxattrs yes
        lvm2 yes
       mknod yes
      ntfs3g yes
   ntfsprogs yes
    realpath yes
       scrub yes
     selinux yes
          xz yes
    zerofree yes

1 files changed, 14 insertions, 0 deletions

diff --git a/fish/fish.c b/fish/fish.c
index d38d1c13..cbbbf970 100644
--- a/fish/fish.c
+++ b/fish/fish.c
@@ -992,6 +992,8 @@ issue_command (const char *cmd, char *argv[], const char *pipecmd)
     r = do_reopen (cmd, argc, argv);
   else if (STRCASEEQ (cmd, "sparse"))
     r = do_sparse (cmd, argc, argv);
+  else if (STRCASEEQ (cmd, "supported"))
+    r = do_supported (cmd, argc, argv);
   else if (STRCASEEQ (cmd, "time"))
     r = do_time (cmd, argc, argv);
   else
@@ -1049,6 +1051,8 @@ list_builtin_commands (void)
   printf ("%-20s %s\n",
           "sparse", _("allocate a sparse image file"));
   printf ("%-20s %s\n",
+          "supported", _("list supported groups of commands"));
+  printf ("%-20s %s\n",
           "time", _("measure time taken to run command"));
 
   /* actions are printed after this (see list_commands) */
@@ -1162,6 +1166,16 @@ display_builtin_command (const char *cmd)
               "\n"
               "    Size can be specified using standard suffixes, eg. '1M'.\n"
               ));
+  else if (STRCASEEQ (cmd, "supported"))
+    printf (_("supported - list supported groups of commands\n"
+              "     supported\n"
+              "\n"
+              "    This command returns a list of the optional groups\n"
+              "    known to the daemon, and indicates which ones are\n"
+              "    supported by this build of the libguestfs appliance.\n"
+              "\n"
+              "    See also guestfs(3) section AVAILABILITY.\n"
+              ));
   else if (STRCASEEQ (cmd, "time"))
     printf (_("time - measure time taken to run command\n"
               "    time <command> [<args> ...]\n"