Clarify stdin input

Resolve #836.

cdist/argparse.py

@@ -273,8 +273,7 @@ def get_parsers():
             '-f', '--file',
             help=('Read specified file for a list of additional hosts to '
                   'operate on or if \'-\' is given, read stdin (one host per '
-                  'line). If no host or host file is specified then, by '
+                  'line).'),
-                  'default, read hosts from stdin.'),
             dest='hostfile', required=False)
     parser['config_args'].add_argument(
            '-p', '--parallel', nargs='?', metavar='HOST_MAX',
@@ -326,9 +325,7 @@ def get_parsers():
     parser['add-host'].add_argument(
            '-f', '--file',
            help=('Read additional hosts to add from specified file '
-                 'or from stdin if \'-\' (each host on separate line). '
+                 'or from stdin if \'-\' (each host on separate line). '),
-                 'If no host or host file is specified then, by default, '
-                 'read from stdin.'),
            dest='hostfile', required=False)
 
     parser['add-tag'] = parser['invsub'].add_parser(
@@ -342,20 +339,12 @@ def get_parsers():
     parser['add-tag'].add_argument(
            '-f', '--file',
            help=('Read additional hosts to add tags from specified file '
-                 'or from stdin if \'-\' (each host on separate line). '
+                 'or from stdin if \'-\' (each host on separate line). '),
-                 'If no host or host file is specified then, by default, '
-                 'read from stdin. If no tags/tagfile nor hosts/hostfile'
-                 ' are specified then tags are read from stdin and are'
-                 ' added to all hosts.'),
            dest='hostfile', required=False)
     parser['add-tag'].add_argument(
            '-T', '--tag-file',
            help=('Read additional tags to add from specified file '
-                 'or from stdin if \'-\' (each tag on separate line). '
+                 'or from stdin if \'-\' (each tag on separate line). '),
-                 'If no tag or tag file is specified then, by default, '
-                 'read from stdin. If no tags/tagfile nor hosts/hostfile'
-                 ' are specified then tags are read from stdin and are'
-                 ' added to all hosts.'),
            dest='tagfile', required=False)
     parser['add-tag'].add_argument(
            '-t', '--taglist',
@@ -376,9 +365,7 @@ def get_parsers():
     parser['del-host'].add_argument(
             '-f', '--file',
             help=('Read additional hosts to delete from specified file '
-                  'or from stdin if \'-\' (each host on separate line). '
+                  'or from stdin if \'-\' (each host on separate line). '),
-                  'If no host or host file is specified then, by default, '
-                  'read from stdin.'),
             dest='hostfile', required=False)
 
     parser['del-tag'] = parser['invsub'].add_parser(
@@ -396,20 +383,13 @@ def get_parsers():
     parser['del-tag'].add_argument(
             '-f', '--file',
             help=('Read additional hosts to delete tags for from specified '
-                  'file or from stdin if \'-\' (each host on separate line). '
+                  'file or from stdin if \'-\' (each host on separate '
-                  'If no host or host file is specified then, by default, '
+                  'line). '),
-                  'read from stdin. If no tags/tagfile nor hosts/hostfile'
-                  ' are specified then tags are read from stdin and are'
-                  ' deleted from all hosts.'),
             dest='hostfile', required=False)
     parser['del-tag'].add_argument(
             '-T', '--tag-file',
             help=('Read additional tags from specified file '
-                  'or from stdin if \'-\' (each tag on separate line). '
+                  'or from stdin if \'-\' (each tag on separate line). '),
-                  'If no tag or tag file is specified then, by default, '
-                  'read from stdin. If no tags/tagfile nor'
-                  ' hosts/hostfile are specified then tags are read from'
-                  ' stdin and are added to all hosts.'),
             dest='tagfile', required=False)
     parser['del-tag'].add_argument(
             '-t', '--taglist',

cdist/config.py

@@ -175,9 +175,11 @@ class Config:
             raise cdist.Error(("Cannot read both, manifest and host file, "
                                "from stdin"))
 
-        # if no host source is specified then read hosts from stdin
         if not (args.hostfile or args.host):
-            args.hostfile = '-'
+            if args.tag or args.all_tagged_hosts:
+                raise cdist.Error(("Target host tag(s) missing"))
+            else:
+                raise cdist.Error(("Target host(s) missing"))
 
         if args.manifest == '-':
             # read initial manifest from stdin

cdist/inventory.py

@@ -299,7 +299,7 @@ class InventoryHost(Inventory):
         self.all = all
 
         if not self.hosts and not self.hostfile:
-            self.hostfile = "-"
+            raise cdist.Error("Host(s) missing")
 
     def _new_hostpath(self, hostpath):
         # create empty file
@@ -355,7 +355,7 @@ class InventoryTag(Inventory):
         else:
             self.allhosts = False
         if not self.tags and not self.tagfile:
-            self.tagfile = "-"
+            raise cdist.Error("Tag(s) missing")
 
         if self.hostfile == "-" and self.tagfile == "-":
             raise cdist.Error("Cannot read both, hosts and tags, from stdin")

cdist/test/inventory/__init__.py

@@ -307,11 +307,10 @@ class InventoryTestCase(test.CdistTestCase):
             raise e
 
     # InventoryTag
+    @unittest.expectedFailure
     def test_inventory_tag_init(self):
         invTag = inventory.InventoryTag(db_basedir=inventory_dir,
                                         action="add")
-        self.assertTrue(invTag.allhosts)
-        self.assertEqual(invTag.tagfile, "-")
 
     def test_inventory_tag_stdin_multiple_hosts(self):
         try:

docs/src/man1/cdist.rst

@@ -177,10 +177,8 @@ Install command is currently in beta.
 
 **-f HOSTFILE, --file HOSTFILE**
     Read specified file for a list of additional hosts to operate on
-    or if '-' is given, read stdin (one host per line).
+    or if '-' is given, read stdin (one host per line). For the file
-    If no host or host file is specified then, by default,
+    format see :strong:`HOSTFILE FORMAT` below.
-    read hosts from stdin. For the file format see
-    :strong:`HOSTFILE FORMAT` below.
 
 **-g CONFIG_FILE, --config-file CONFIG_FILE**
     Use specified custom configuration file.
@@ -299,9 +297,8 @@ Add host(s) to inventory database.
 
 **-f HOSTFILE, --file HOSTFILE**
     Read additional hosts to add from specified file or
-    from stdin if '-' (each host on separate line). If no
+    from stdin if '-' (each host on separate line).
-    host or host file is specified then, by default, read
+    Hostfile format is the same as config hostfile format.
-    from stdin. Hostfile format is the same as config hostfile format.
 
 **-g CONFIG_FILE, --config-file CONFIG_FILE**
     Use specified custom configuration file.
@@ -327,11 +324,8 @@ Add tag(s) to inventory database.
 
 **-f HOSTFILE, --file HOSTFILE**
     Read additional hosts to add tags from specified file
-    or from stdin if '-' (each host on separate line). If
+    or from stdin if '-' (each host on separate line).
-    no host or host file is specified then, by default,
+    Hostfile format is the same as config hostfile format.
-    read from stdin. If no tags/tagfile nor hosts/hostfile
-    are specified then tags are read from stdin and are
-    added to all hosts. Hostfile format is the same as config hostfile format.
 
 **-g CONFIG_FILE, --config-file CONFIG_FILE**
     Use specified custom configuration file.
@@ -346,11 +340,8 @@ Add tag(s) to inventory database.
 
 **-T TAGFILE, --tag-file TAGFILE**
     Read additional tags to add from specified file or
-    from stdin if '-' (each tag on separate line). If no
+    from stdin if '-' (each tag on separate line).
-    tag or tag file is specified then, by default, read
+    Tagfile format is the same as config hostfile format.
-    from stdin. If no tags/tagfile nor hosts/hostfile are
-    specified then tags are read from stdin and are added
-    to all hosts. Tagfile format is the same as config hostfile format.
 
 **-t TAGLIST, --taglist TAGLIST**
     Tag list to be added for specified host(s), comma
@@ -372,9 +363,8 @@ Delete host(s) from inventory database.
 
 **-f HOSTFILE, --file HOSTFILE**
     Read additional hosts to delete from specified file or
-    from stdin if '-' (each host on separate line). If no
+    from stdin if '-' (each host on separate line).
-    host or host file is specified then, by default, read
+    Hostfile format is the same as config hostfile format.
-    from stdin. Hostfile format is the same as config hostfile format.
 
 **-g CONFIG_FILE, --config-file CONFIG_FILE**
     Use specified custom configuration file.
@@ -404,11 +394,8 @@ Delete tag(s) from inventory database.
 **-f HOSTFILE, --file HOSTFILE**
     Read additional hosts to delete tags for from
     specified file or from stdin if '-' (each host on
-    separate line). If no host or host file is specified
+    separate line). Hostfile format is the same as
-    then, by default, read from stdin. If no tags/tagfile
+    config hostfile format.
-    nor hosts/hostfile are specified then tags are read
-    from stdin and are deleted from all hosts. Hostfile
-    format is the same as config hostfile format.
 
 **-g CONFIG_FILE, --config-file CONFIG_FILE**
     Use specified custom configuration file.
@@ -423,11 +410,8 @@ Delete tag(s) from inventory database.
 
 **-T TAGFILE, --tag-file TAGFILE**
     Read additional tags from specified file or from stdin
-    if '-' (each tag on separate line). If no tag or tag
+    if '-' (each tag on separate line).
-    file is specified then, by default, read from stdin.
+    Tagfile format is the same as config hostfile format.
-    If no tags/tagfile nor hosts/hostfile are specified
-    then tags are read from stdin and are added to all
-    hosts. Tagfile format is the same as config hostfile format.
 
 **-t TAGLIST, --taglist TAGLIST**
     Tag list to be deleted for specified host(s), comma