Introduce virsh self-test

A new hidden command for virsh that will iterate over
all command groups and commands and print help for every single one.

This involves running vshCmddefOptParse so we can get an error if
one of the command's option structure is invalid.

.gitignore

@@ -162,6 +162,7 @@
 /tests/*test
 /tests/commandhelper
 /tests/qemucapsprobe
+!/tests/virsh-self-test
 !/tests/virt-aa-helper-test
 /tests/objectlocking
 /tests/objectlocking-files.txt

tests/Makefile.am

@@ -368,6 +368,7 @@ libvirtd_test_scripts =		\
 	virsh-read-bufsiz		\
 	virsh-read-non-seekable		\
 	virsh-schedinfo			\
+	virsh-self-test			\
 	virsh-start			\
 	virsh-synopsis			\
 	virsh-undefine			\

tests/virsh-self-test

@@ -0,0 +1,37 @@
+#!/bin/sh
+# run virsh self-test to make sure command option structures are valid
+
+# Copyright (C) 2016 Red Hat, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see
+# <http://www.gnu.org/licenses/>.
+
+. "$(dirname $0)/test-lib.sh"
+
+fail=0
+
+test_url=test:///default
+
+test_intro "virsh-self-test"
+$abs_top_builddir/tools/virsh -c $test_url self-test > /dev/null
+status=$?
+test_result 1 "virsh-self-test" $status
+
+if test "$status" = "1" ; then
+   fail=1
+fi
+
+test_final $counter $fail
+
+(exit $fail); exit $fail

tools/virsh.c

@@ -341,6 +341,45 @@ virshConnectionHandler(vshControl *ctl)
     return NULL;
 }
 
+/* -----------------
+ * Command self-test
+ * ----------------- */
+
+static const vshCmdInfo info_selftest[] = {
+    {.name = "help",
+     .data = N_("internal command for testing virsh")
+    },
+    {.name = "desc",
+     .data = N_("internal use only")
+    },
+    {.name = NULL}
+};
+
+/* Prints help for every command.
+ * That runs vshCmddefOptParse which validates
+ * the per-command options structure. */
+static bool
+cmdSelfTest(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
+{
+    const vshCmdGrp *grp;
+    const vshCmdDef *def;
+
+    vshPrint(ctl, "Do not use the following output:\n\n");
+
+    for (grp = cmdGroups; grp->name; grp++) {
+        for (def = grp->commands; def->name; def++) {
+            if (def->flags & VSH_CMD_FLAG_ALIAS)
+                continue;
+
+            if (!vshCmddefHelp(ctl, def->name))
+                return false;
+        }
+    }
+
+    return true;
+}
+
+
 /* ---------------
  * Misc utils
  * ---------------
@@ -857,6 +896,12 @@ static const vshCmdDef virshCmds[] = {
      .info = info_connect,
      .flags = VSH_CMD_FLAG_NOCONNECT
     },
+    {.name = "self-test",
+     .handler = cmdSelfTest,
+     .opts = NULL,
+     .info = info_selftest,
+     .flags = VSH_CMD_FLAG_NOCONNECT | VSH_CMD_FLAG_ALIAS
+    },
     {.name = NULL}
 };