handle dependencies recursively

src/ahriman/application/ahriman.py

@@ -346,6 +346,8 @@ def _set_repo_rebuild_parser(root: SubParserAction) -> argparse.ArgumentParser:
     parser = root.add_parser("repo-rebuild", aliases=["rebuild"], help="rebuild repository",
                              description="force rebuild whole repository", formatter_class=_formatter)
     parser.add_argument("--depends-on", help="only rebuild packages that depend on specified package", action="append")
+    parser.add_argument("--dry-run", help="just perform check for packages without rebuild process itself",
+                        action="store_true")
     parser.set_defaults(handler=handlers.Rebuild)
     return parser
 

src/ahriman/application/handlers/rebuild.py

@@ -22,6 +22,7 @@ import argparse
 from typing import Type
 
 from ahriman.application.application import Application
+from ahriman.application.formatters.update_printer import UpdatePrinter
 from ahriman.application.handlers.handler import Handler
 from ahriman.core.configuration import Configuration
 
@@ -44,9 +45,10 @@ class Rebuild(Handler):
         depends_on = set(args.depends_on) if args.depends_on else None
 
         application = Application(architecture, configuration, no_report)
-        packages = [
-            package
-            for package in application.repository.packages()
-            if depends_on is None or depends_on.intersection(package.depends)
-        ]  # we have to use explicit list here for testing purpose
-        application.update(packages)
+        updates = application.repository.packages_depends_on(depends_on)
+        if args.dry_run:
+            for package in updates:
+                UpdatePrinter(package, package.version).print(verbose=True)
+            return
+
+        application.update(updates)

src/ahriman/core/repository/repository.py

@@ -18,7 +18,7 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 from pathlib import Path
-from typing import Dict, Iterable, List
+from typing import Dict, Iterable, List, Optional
 
 from ahriman.core.repository.executor import Executor
 from ahriman.core.repository.update_handler import UpdateHandler
@@ -68,3 +68,20 @@ class Repository(Executor, UpdateHandler):
         :return: list of filenames from the directory
         """
         return list(filter(package_like, self.paths.packages.iterdir()))
+
+    def packages_depends_on(self, depends_on: Optional[Iterable[str]]) -> List[Package]:
+        """
+        extract list of packages which depends on specified package
+        :param: depends_on: dependencies of the packages
+        :return: list of repository packages which depend on specified packages
+        """
+        packages = self.packages()
+        if depends_on is None:
+            return packages  # no list provided extract everything by default
+        depends_on = set(depends_on)
+
+        return [
+            package
+            for package in packages
+            if depends_on is None or depends_on.intersection(package.full_depends(self.pacman, packages))
+        ]

src/ahriman/models/package.py

@@ -20,13 +20,14 @@
 from __future__ import annotations
 
 import aur  # type: ignore
+import copy
 import logging
 
 from dataclasses import asdict, dataclass
 from pathlib import Path
 from pyalpm import vercmp  # type: ignore
 from srcinfo.parse import parse_srcinfo  # type: ignore
-from typing import Any, Dict, List, Optional, Set, Type
+from typing import Any, Dict, Iterable, List, Optional, Set, Type
 
 from ahriman.core.alpm.pacman import Pacman
 from ahriman.core.exceptions import InvalidPackageInfo
@@ -257,6 +258,36 @@ class Package:
 
         return self.version
 
+    def full_depends(self, pacman: Pacman, packages: Iterable[Package]) -> List[str]:
+        """
+        generate full dependencies list including transitive dependencies
+        :param pacman: alpm wrapper instance
+        :param packages: repository package list
+        :return: all dependencies of the package
+        """
+        dependencies = {}
+        # load own package dependencies
+        for package_base in packages:
+            for name, repo_package in package_base.packages.items():
+                dependencies[name] = repo_package.depends
+                for provides in repo_package.provides:
+                    dependencies[provides] = repo_package.depends
+        # load repository dependencies
+        for database in pacman.handle.get_syncdbs():
+            for pacman_package in database.pkgcache:
+                dependencies[pacman_package.name] = pacman_package.depends
+                for provides in pacman_package.provides:
+                    dependencies[provides] = pacman_package.depends
+
+        result = set(self.depends)
+        current_depends: Set[str] = set()
+        while result != current_depends:
+            current_depends = copy.deepcopy(result)
+            for package in current_depends:
+                result.update(dependencies.get(package, []))
+
+        return sorted(result)
+
     def is_outdated(self, remote: Package, paths: RepositoryPaths, calculate_version: bool = True) -> bool:
         """
         check if package is out-of-dated