p2v: Add proper test for command line parsing.

This also adds a couple of deliberately undocumented (and unsupported)
command line parameters to make testing simpler:

p2v.skip_test_connection  - don't try to test the connection
p2v.dump_config_and_exit  - after parsing command line, print it and exit

This updates commit 716244c337.

p2v/Makefile.am

@@ -155,8 +155,11 @@ stamp-virt-p2v-make-kickstart.pod: virt-p2v-make-kickstart.pod
 
 TESTS_ENVIRONMENT = $(top_builddir)/run --test
 
-if ENABLE_APPLIANCE
 TESTS = \
+	test-virt-p2v-cmdline.sh
+
+if ENABLE_APPLIANCE
+TESTS += \
 	test-virt-p2v.sh
 endif ENABLE_APPLIANCE
 

p2v/kernel.c

@@ -79,12 +79,15 @@ kernel_configuration (struct config *config, char **cmdline, int cmdline_source)
   /* We should now be able to connect and interrogate virt-v2v
    * on the conversion server.
    */
-  if (test_connection (config) == -1) {
-    const char *err = get_ssh_error ();
+  p = get_cmdline_key (cmdline, "p2v.skip_test_connection");
+  if (!p) {
+    if (test_connection (config) == -1) {
+      const char *err = get_ssh_error ();
 
-    fprintf (stderr, "%s: error opening control connection to %s:%d: %s\n",
-             guestfs_int_program_name, config->server, config->port, err);
-    exit (EXIT_FAILURE);
+      fprintf (stderr, "%s: error opening control connection to %s:%d: %s\n",
+               guestfs_int_program_name, config->server, config->port, err);
+      exit (EXIT_FAILURE);
+    }
   }
 
   p = get_cmdline_key (cmdline, "p2v.name");
@@ -196,6 +199,13 @@ kernel_configuration (struct config *config, char **cmdline, int cmdline_source)
     config->output_storage = strdup (p);
   }
 
+  /* Undocumented command line tool used for testing command line parsing. */
+  p = get_cmdline_key (cmdline, "p2v.dump_config_and_exit");
+  if (p) {
+    print_config (config, stdout);
+    exit (EXIT_SUCCESS);
+  }
+
   /* Perform the conversion in text mode. */
   if (start_conversion (config, notify_ui_callback) == -1) {
     const char *err = get_conversion_error ();

p2v/test-virt-p2v-cmdline.sh

@@ -0,0 +1,59 @@
+#!/bin/bash -
+# libguestfs virt-p2v test script
+# Copyright (C) 2015 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Test virt-p2v command line parsing in non-GUI mode.
+
+unset CDPATH
+export LANG=C
+set -e
+
+if [ -n "$SKIP_TEST_VIRT_P2V_CMDLINE_SH" ]; then
+    echo "$0: test skipped because environment variable is set"
+    exit 77
+fi
+
+out=test-virt-p2v-cmdline.out
+rm -f $out
+
+# The Linux kernel command line.
+virt-p2v --cmdline='p2v.pre="echo 1 2 3" p2v.server=localhost p2v.port=123 p2v.username=user p2v.password=secret p2v.skip_test_connection p2v.name=test p2v.vcpus=4 p2v.memory=1G p2v.disks=sda,sdb,sdc p2v.removable=sdd p2v.interfaces=eth0,eth1 p2v.o=local p2v.oa=sparse p2v.oc=qemu:///session p2v.of=raw p2v.os=/var/tmp p2v.network=em1:wired,other p2v.dump_config_and_exit' > $out
+
+# For debugging purposes.
+cat $out
+
+# Check the output contains what we expect.
+grep "^echo 1 2 3" $out
+grep "^1 2 3" $out
+grep "^conversion server.*localhost" $out
+grep "^port.*123" $out
+grep "^username.*user" $out
+grep "^sudo.*false" $out
+grep "^guest name.*test" $out
+grep "^vcpus.*4" $out
+grep "^memory.*"$((1024*1024*1024)) $out
+grep "^disks.*sda sdb sdc" $out
+grep "^removable.*sdd" $out
+grep "^interfaces.*eth0 eth1" $out
+grep "^network map.*em1:wired other" $out
+grep "^output.*local" $out
+grep "^output alloc.*sparse" $out
+grep "^output conn.*qemu:///session" $out
+grep "^output format.*raw" $out
+grep "^output storage.*/var/tmp" $out
+
+rm $out