ipa-test-config: Add --json and --yaml output options

Also update the man page.

Part of the work for: https://fedorahosted.org/freeipa/ticket/3938

Reviewed-By: Tomas Babej <tbabej@redhat.com>

ipatests/ipa-test-config

@@ -22,6 +22,7 @@
 import sys
 import os
 import argparse
+import json
 
 from ipalib.constants import FQDN
 from ipatests.test_integration import config
@@ -59,6 +60,14 @@ def main(argv):
                         help='Do not print Simple Vars '
                              '(normally included backwards-compatibility)')
 
+    parser.add_argument('--yaml', action='store_const', dest='output_format',
+                        const='yaml',
+                        help='Output configuration in YAML format')
+
+    parser.add_argument('--json', action='store_const', dest='output_format',
+                        const='json',
+                        help='Output configuration in JSON format')
+
     args = parser.parse_args(argv)
 
     hostsargs = [bool(args.host), bool(args.master), bool(args.replica),
@@ -77,7 +86,13 @@ def main(argv):
 
     conf = config.Config.from_env(os.environ)
 
-    return config.env_to_script(get_object(conf, args).to_env(**kwargs))
+    if args.output_format == 'json':
+        return json.dumps(conf.to_dict(), indent=2)
+    elif args.output_format == 'yaml':
+        import yaml
+        return yaml.safe_dump(conf.to_dict(), default_flow_style=False)
+    else:
+        return config.env_to_script(get_object(conf, args).to_env(**kwargs))
 
 
 def get_object(conf, args):

ipatests/man/ipa-test-config.1

@@ -30,7 +30,7 @@ The FreeIPA integration test suite is configured by setting environment
 variables.
 The ipa\-run\-tests command reads these variables and prints detailed
 configuration for shell-based scripts to standard output.
-The output of ipa\-run\-tests consists of export statements that can be
+The default output of ipa\-run\-tests consists of export statements that can be
 sourced by Bash.
 
 If run without arguments, it prints out configuration specific to the local
@@ -68,9 +68,32 @@ Output configuration for the host with the given role.
 \fB\-\-no\-simple\fR
 Do not output Simple Vars.
 These are normally included for backwards compatibility.
+.TP
+\fB\-\-yaml\fR
+Output configuration in YAML format instead of Bash script.
+This requires the PyYAML library to be installed.
+.TP
+\fB\-\-json\fR
+Output configuration in JSON format instead of Bash script.
 
 .SH "ENVIRONMENT VARIABLES"
 
+.TP
+File\-based configuration:
+
+.TP
+\fB$IPATEST_YAML_CONFIG\fR
+    Specifies a file that contains configuration in YAML format,
+    as given by \fBipa\-test\-config \-\-global \-\-yaml\fR.
+    If given, the other environment variables are ignored.
+    This requires the PyYAML library to be installed.
+
+.TP
+\fB$IPATEST_JSON_CONFIG\fR
+    Specifies a file that contains configuration in JSON format,
+    as given by \fBipa\-test\-config \-\-global \-\-json\fR.
+    If given, the other environment variables are ignored.
+
 .TP
 Domain configuration:
     Domain is implicitly defined by _envX suffix of the environment variables,