add collection plugin listing to ansible-doc (#68522)

- listing from collections
 - able to filter by namespace or collection
 - masks dupes just as normal collection loading does

lib/ansible/cli/doc.py

@@ -18,6 +18,7 @@ from ansible import constants as C
 from ansible import context
 from ansible.cli import CLI
 from ansible.cli.arguments import option_helpers as opt_help
+from ansible.collections.list import list_collection_dirs, get_collection_name_from_path
 from ansible.errors import AnsibleError, AnsibleOptionsError
 from ansible.module_utils._text import to_native
 from ansible.module_utils.common._collections_compat import Container, Sequence
@@ -36,6 +37,16 @@ def jdump(text):
     display.display(json.dumps(text, sort_keys=True, indent=4))
 
 
+def add_collection_plugins(plugin_list, plugin_type, coll_filter=None):
+
+    # TODO: take into account routing.yml once implemented
+    colldirs = list_collection_dirs(coll_filter=coll_filter)
+    for path in colldirs:
+        collname = get_collection_name_from_path(path)
+        ptype = C.COLLECTION_PTYPE_COMPAT.get(plugin_type, plugin_type)
+        plugin_list.update(DocCLI.find_plugins(os.path.join(path, 'plugins', ptype), plugin_type, collname))
+
+
 class RemovedPlugin(Exception):
     pass
 
@@ -60,6 +71,8 @@ class DocCLI(CLI):
 
     def init_parser(self):
 
+        coll_filter = 'A supplied argument will be used for filtering, can be a namespace or full collection name.'
+
         super(DocCLI, self).init_parser(
             desc="plugin documentation tool",
             epilog="See man pages for Ansible CLI options or website for tutorials https://docs.ansible.com"
@@ -77,9 +90,9 @@ class DocCLI(CLI):
 
         exclusive = self.parser.add_mutually_exclusive_group()
         exclusive.add_argument("-F", "--list_files", action="store_true", default=False, dest="list_files",
-                               help='Show plugin names and their source files without summaries (implies --list)')
+                               help='Show plugin names and their source files without summaries (implies --list). %s' % coll_filter)
         exclusive.add_argument("-l", "--list", action="store_true", default=False, dest='list_dir',
-                               help='List available plugins')
+                               help='List available plugins. %s' % coll_filter)
         exclusive.add_argument("-s", "--snippet", action="store_true", default=False, dest='show_snippet',
                                help='Show playbook snippet for specified plugin(s)')
         exclusive.add_argument("--metadata-dump", action="store_true", default=False, dest='dump',
@@ -119,49 +132,52 @@ class DocCLI(CLI):
         search_paths = DocCLI.print_paths(loader)
         loader._paths = None  # reset so we can use subdirs below
 
-        # list plugins names and filepath for type
-        if context.CLIARGS['list_files']:
+        # list plugins names or filepath for type, both options share most code
+        if context.CLIARGS['list_files'] or context.CLIARGS['list_dir']:
+
+            coll_filter = None
+            if len(context.CLIARGS['args']) == 1:
+                coll_filter = context.CLIARGS['args'][0]
+
+            if coll_filter in ('', None):
                 paths = loader._get_paths()
                 for path in paths:
                     self.plugin_list.update(DocCLI.find_plugins(path, plugin_type))
 
-            plugins = self._get_plugin_list_filenames(loader)
+            add_collection_plugins(self.plugin_list, plugin_type, coll_filter=coll_filter)
+
+            # get appropriate content depending on option
+            if context.CLIARGS['list_dir']:
+                results = self._get_plugin_list_descriptions(loader)
+            elif context.CLIARGS['list_files']:
+                results = self._get_plugin_list_filenames(loader)
+
             if do_json:
-                jdump(plugins)
-            else:
+                jdump(results)
+            elif self.plugin_list:
                 # format for user
                 displace = max(len(x) for x in self.plugin_list)
                 linelimit = display.columns - displace - 5
                 text = []
 
-                for plugin in plugins.keys():
-                    filename = plugins[plugin]
-                    text.append("%-*s %-*.*s" % (displace, plugin, linelimit, len(filename), filename))
-
-                DocCLI.pager("\n".join(text))
+                # format display per option
+                if context.CLIARGS['list_files']:
+                    # list files
 
-        # list file plugins for type (does not read docs, very fast)
-        elif context.CLIARGS['list_dir']:
-            paths = loader._get_paths()
-            for path in paths:
-                self.plugin_list.update(DocCLI.find_plugins(path, plugin_type))
+                    for plugin in results.keys():
 
-            descs = self._get_plugin_list_descriptions(loader)
-            if do_json:
-                jdump(descs)
+                        filename = results[plugin]
+                        text.append("%-*s %-*.*s" % (displace, plugin, linelimit, len(filename), filename))
                 else:
-                displace = max(len(x) for x in self.plugin_list)
-                linelimit = display.columns - displace - 5
-                text = []
+                    # list plugins
                     deprecated = []
-                for plugin in descs.keys():
-
-                    desc = DocCLI.tty_ify(descs[plugin])
+                    for plugin in results.keys():
+                        desc = DocCLI.tty_ify(results[plugin])
 
                         if len(desc) > linelimit:
                             desc = desc[:linelimit] + '...'
 
-                    if plugin.startswith('_'):  # Handle deprecated
+                        if plugin.startswith('_'):  # Handle deprecated # TODO: add mark for deprecated collection plugins
                             deprecated.append("%-*s %-*.*s" % (displace, plugin[1:], linelimit, len(desc), desc))
                         else:
                             text.append("%-*s %-*.*s" % (displace, plugin, linelimit, len(desc), desc))
@@ -170,7 +186,10 @@ class DocCLI(CLI):
                             text.append("\nDEPRECATED:")
                             text.extend(deprecated)
 
+                # display results
                 DocCLI.pager("\n".join(text))
+            else:
+                display.warning("No plugins found.")
 
         # dump plugin desc/metadata as JSON
         elif context.CLIARGS['dump']:
@@ -349,7 +368,7 @@ class DocCLI(CLI):
         return text
 
     @staticmethod
-    def find_plugins(path, ptype):
+    def find_plugins(path, ptype, collection=None):
 
         display.vvvv("Searching %s for plugins" % path)
 
@@ -386,6 +405,10 @@ class DocCLI(CLI):
             plugin = plugin.lstrip('_')  # remove underscore from deprecated plugins
 
             if plugin not in BLACKLIST.get(bkey, ()):
+
+                if collection:
+                    plugin = '%s.%s' % (collection, plugin)
+
                 plugin_list.add(plugin)
                 display.vvvv("Added %s" % plugin)
 

lib/ansible/collections/__init__.py

@@ -0,0 +1,27 @@
+# (c) 2019 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+
+
+FLAG_FILES = frozenset(['MANIFEST.json', 'galaxy.yml'])
+
+
+def is_collection_path(path):
+    """
+    Verify that a path meets min requirements to be a collection
+    :param path: byte-string path to evaluate for collection containment
+    :return: boolean signifying 'collectionness'
+    """
+
+    is_coll = False
+    if os.path.isdir(path):
+        for flag in FLAG_FILES:
+            if os.path.exists(os.path.join(path, flag)):
+                is_coll = True
+                break
+
+    return is_coll

lib/ansible/collections/list.py

@@ -0,0 +1,89 @@
+# (c) 2019 Ansible Project
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import os
+
+from collections import defaultdict
+
+from ansible.collections import is_collection_path
+from ansible.utils.collection_loader import AnsibleCollectionLoader, get_collection_name_from_path
+from ansible.utils.display import Display
+
+display = Display()
+
+
+def list_valid_collection_paths(search_paths=None, warn=False):
+    """
+    Filter out non existing or invalid search_paths for collections
+    :param search_paths: list of text-string paths, if none load default config
+    :param warn: display warning if search_path does not exist
+    :return: subset of original list
+    """
+
+    if search_paths is None:
+        search_paths = AnsibleCollectionLoader().n_collection_paths
+
+    for path in search_paths:
+
+        if not os.path.exists(path):
+            # warn for missing, but not if default
+            if warn:
+                display.warning("The configured collection path {0} does not exist.".format(path))
+            continue
+
+        if not os.path.isdir(path):
+            if warn:
+                display.warning("The configured collection path {0}, exists, but it is not a directory.".format(path))
+            continue
+
+        yield path
+
+
+def list_collection_dirs(search_paths=None, coll_filter=None):
+    """
+    Return paths for the specific collections found in passed or configured search paths
+    :param search_paths: list of text-string paths, if none load default config
+    :param coll_filter: limit collections to just the specific namespace or collection, if None all are returned
+    :return: list of collection directory paths
+    """
+
+    collections = defaultdict(dict)
+    for path in list_valid_collection_paths(search_paths):
+
+        if os.path.isdir(path):
+            coll_root = os.path.join(path, 'ansible_collections')
+
+            if os.path.exists(coll_root) and os.path.isdir(coll_root):
+
+                coll = None
+                if coll_filter is None:
+                    namespaces = os.listdir(coll_root)
+                else:
+                    if '.' in coll_filter:
+                        (nsp, coll) = coll_filter.split('.')
+                    else:
+                        nsp = coll_filter
+                    namespaces = [nsp]
+
+                for ns in namespaces:
+                    namespace_dir = os.path.join(coll_root, ns)
+
+                    if os.path.isdir(namespace_dir):
+
+                        if coll is None:
+                            colls = os.listdir(namespace_dir)
+                        else:
+                            colls = [coll]
+
+                        for collection in colls:
+
+                            # skip dupe collections as they will be masked in execution
+                            if collection not in collections[ns]:
+                                coll_dir = os.path.join(namespace_dir, collection)
+                                if is_collection_path(coll_dir):
+                                    cpath = os.path.join(namespace_dir, collection)
+                                    collections[ns][collection] = cpath
+                                    yield cpath

lib/ansible/constants.py

@@ -97,6 +97,7 @@ BECOME_METHODS = _DeprecatedSequenceConstant(
 # CONSTANTS ### yes, actual ones
 BLACKLIST_EXTS = ('.pyc', '.pyo', '.swp', '.bak', '~', '.rpm', '.md', '.txt', '.rst')
 BOOL_TRUE = BOOLEANS_TRUE
+COLLECTION_PTYPE_COMPAT = {'module': 'modules'}
 DEFAULT_BECOME_PASS = None
 DEFAULT_PASSWORD_CHARS = to_text(ascii_letters + digits + ".,:-_", errors='strict')  # characters included in auto-generated passwords
 DEFAULT_REMOTE_PASS = None

lib/ansible/utils/collection_loader.py

@@ -6,7 +6,6 @@ __metaclass__ = type
 
 import os
 import os.path
-import pkgutil
 import re
 import sys
 
@@ -509,7 +508,6 @@ def get_collection_role_path(role_name, collection_list=None):
 
     if acr:
         # looks like a valid qualified collection ref; skip the collection_list
-        role = acr.resource
         collection_list = [acr.collection]
         subdirs = acr.subdirs
         resource = acr.resource