1 files changed, 111 insertions, 0 deletions
diff --git a/lib/ansiblelint/runner.py b/lib/ansiblelint/runner.py
new file mode 100644
index 0000000..f73945f
--- /dev/null
+++ b/lib/ansiblelint/runner.py
@@ -0,0 +1,111 @@
+"""Runner implementation."""
+import logging
+import os
+from typing import TYPE_CHECKING, Any, FrozenSet, Generator, List, Optional, Set
+
+import ansiblelint.file_utils
+import ansiblelint.skip_utils
+import ansiblelint.utils
+from ansiblelint.errors import MatchError
+from ansiblelint.rules.LoadingFailureRule import LoadingFailureRule
+
+if TYPE_CHECKING:
+    from ansiblelint.rules import RulesCollection
+
+
+_logger = logging.getLogger(__name__)
+
+
+class Runner(object):
+    """Runner class performs the linting process."""
+
+    def __init__(
+            self,
+            rules: "RulesCollection",
+            playbook: str,
+            tags: FrozenSet[Any] = frozenset(),
+            skip_list: Optional[FrozenSet[Any]] = frozenset(),
+            exclude_paths: List[str] = [],
+            verbosity: int = 0,
+            checked_files: Set[str] = None) -> None:
+        """Initialize a Runner instance."""
+        self.rules = rules
+        self.playbooks = set()
+        # assume role if directory
+        if os.path.isdir(playbook):
+            self.playbooks.add((os.path.join(playbook, ''), 'role'))
+            self.playbook_dir = playbook
+        else:
+            self.playbooks.add((playbook, 'playbook'))
+            self.playbook_dir = os.path.dirname(playbook)
+        self.tags = tags
+        self.skip_list = skip_list
+        self._update_exclude_paths(exclude_paths)
+        self.verbosity = verbosity
+        if checked_files is None:
+            checked_files = set()
+        self.checked_files = checked_files
+
+    def _update_exclude_paths(self, exclude_paths: List[str]) -> None:
+        if exclude_paths:
+            # These will be (potentially) relative paths
+            paths = ansiblelint.utils.expand_paths_vars(exclude_paths)
+            # Since ansiblelint.utils.find_children returns absolute paths,
+            # and the list of files we create in `Runner.run` can contain both
+            # relative and absolute paths, we need to cover both bases.
+            self.exclude_paths = paths + [os.path.abspath(p) for p in paths]
+        else:
+            self.exclude_paths = []
+
+    def is_excluded(self, file_path: str) -> bool:
+        """Verify if a file path should be excluded."""
+        # Any will short-circuit as soon as something returns True, but will
+        # be poor performance for the case where the path under question is
+        # not excluded.
+        return any(file_path.startswith(path) for path in self.exclude_paths)
+
+    def run(self) -> List[MatchError]:
+        """Execute the linting process."""
+        files = list()
+        for playbook in self.playbooks:
+            if self.is_excluded(playbook[0]) or playbook[1] == 'role':
+                continue
+            files.append({'path': ansiblelint.file_utils.normpath(playbook[0]),
+                          'type': playbook[1],
+                          # add an absolute path here, so rules are able to validate if
+                          # referenced files exist
+                          'absolute_directory': os.path.dirname(playbook[0])})
+        matches = set(self._emit_matches(files))
+
+        # remove duplicates from files list
+        files = [value for n, value in enumerate(files) if value not in files[:n]]
+
+        # remove files that have already been checked
+        files = [x for x in files if x['path'] not in self.checked_files]
+        for file in files:
+            _logger.debug(
+                "Examining %s of type %s",
+                ansiblelint.file_utils.normpath(file['path']),
+                file['type'])
+            matches = matches.union(
+                self.rules.run(file, tags=set(self.tags),
+                               skip_list=self.skip_list))
+        # update list of checked files
+        self.checked_files.update([x['path'] for x in files])
+
+        return sorted(matches)
+
+    def _emit_matches(self, files: List) -> Generator[MatchError, None, None]:
+        visited: Set = set()
+        while visited != self.playbooks:
+            for arg in self.playbooks - visited:
+                try:
+                    for child in ansiblelint.utils.find_children(arg, self.playbook_dir):
+                        if self.is_excluded(child['path']):
+                            continue
+                        self.playbooks.add((child['path'], child['type']))
+                        files.append(child)
+                except MatchError as e:
+                    e.rule = LoadingFailureRule
+                    yield e
+                visited.add(arg)