From: Michael Tremer <michael.tremer@ipfire.org>
Date: Wed, 30 Jun 2021 14:59:40 +0000 (+0000)
Subject: Add command for reverse dependency resolution
X-Git-Tag: 0.9.28~1157
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8201cef22c79ea875bfa4e94edeb02008320c53d;p=pakfire.git

Add command for reverse dependency resolution

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/_pakfire/pakfire.c b/src/_pakfire/pakfire.c
index 40c389870..363aff7f4 100644
--- a/src/_pakfire/pakfire.c
+++ b/src/_pakfire/pakfire.c
@@ -472,6 +472,20 @@ static PyObject* Pakfire_whatprovides(PakfireObject* self, PyObject* args, PyObj
 	return obj;
 }
 
+static PyObject* Pakfire_whatrequires(PakfireObject* self, PyObject* args) {
+	const char* requires = NULL;
+
+	if (!PyArg_ParseTuple(args, "s", &requires))
+		return NULL;
+
+	struct pakfire_packagelist* list = pakfire_whatrequires(self->pakfire, requires, 0);
+
+	PyObject* obj = PyList_FromPackageList(list);
+	pakfire_packagelist_unref(list);
+
+	return obj;
+}
+
 static PyObject* Pakfire_search(PakfireObject* self, PyObject* args) {
 	const char* what;
 
@@ -1018,6 +1032,12 @@ static struct PyMethodDef Pakfire_methods[] = {
 		METH_VARARGS|METH_KEYWORDS,
 		NULL
 	},
+	{
+		"whatrequires",
+		(PyCFunction)Pakfire_whatrequires,
+		METH_VARARGS,
+		NULL
+	},
 	{ NULL },
 };
 
diff --git a/src/libpakfire/include/pakfire/pakfire.h b/src/libpakfire/include/pakfire/pakfire.h
index 8bff00247..e066e052f 100644
--- a/src/libpakfire/include/pakfire/pakfire.h
+++ b/src/libpakfire/include/pakfire/pakfire.h
@@ -63,6 +63,7 @@ struct pakfire_repolist* pakfire_get_repos(Pakfire pakfire);
 PakfireRepo pakfire_get_repo(Pakfire pakfire, const char* name);
 
 struct pakfire_packagelist* pakfire_whatprovides(Pakfire pakfire, const char* provides, int flags);
+struct pakfire_packagelist* pakfire_whatrequires(Pakfire pakfire, const char* what, int flags);
 struct pakfire_packagelist* pakfire_search(Pakfire pakfire, const char* what, int flags);
 
 // Logging
diff --git a/src/libpakfire/libpakfire.sym b/src/libpakfire/libpakfire.sym
index 5ed69f299..4387cb3ba 100644
--- a/src/libpakfire/libpakfire.sym
+++ b/src/libpakfire/libpakfire.sym
@@ -44,6 +44,7 @@ global:
 	pakfire_update;
 	pakfire_version_compare;
 	pakfire_whatprovides;
+	pakfire_whatrequires;
 
 	# arch
 	pakfire_arch_native;
diff --git a/src/libpakfire/pakfire.c b/src/libpakfire/pakfire.c
index d89981cb2..ea6c4d9d8 100644
--- a/src/libpakfire/pakfire.c
+++ b/src/libpakfire/pakfire.c
@@ -1374,6 +1374,42 @@ PAKFIRE_EXPORT struct pakfire_packagelist* pakfire_whatprovides(Pakfire pakfire,
 	}
 }
 
+PAKFIRE_EXPORT struct pakfire_packagelist* pakfire_whatrequires(Pakfire pakfire, const char* what, int flags) {
+	// Refresh repositories
+	int r = pakfire_refresh(pakfire, 0);
+	if (r)
+		return NULL;
+
+	// Get the pool ready
+	pakfire_pool_apply_changes(pakfire);
+
+	// Translate dependency to ID
+	Id dep = pakfire_parse_dep(pakfire, what);
+	if (!dep) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	Queue matches;
+	queue_init(&matches);
+
+	// Search for anything that matches
+	pool_whatmatchesdep(pakfire->pool, SOLVABLE_REQUIRES, dep, &matches, 0);
+
+	// Create a packagelist
+	struct pakfire_packagelist* list = pakfire_packagelist_from_queue(pakfire, &matches);
+
+	// Cleanup
+	queue_free(&matches);
+
+	// Sort the list
+	if (list) {
+		pakfire_packagelist_sort(list);
+	}
+
+	return list;
+}
+
 PAKFIRE_EXPORT struct pakfire_packagelist* pakfire_search(Pakfire pakfire, const char* what, int flags) {
 	// Refresh repositories
 	int r = pakfire_refresh(pakfire, 0);
diff --git a/src/pakfire/cli.py b/src/pakfire/cli.py
index 8d196bab5..a7ca30452 100644
--- a/src/pakfire/cli.py
+++ b/src/pakfire/cli.py
@@ -93,6 +93,13 @@ class Cli(object):
 		provides.add_argument("pattern", nargs="+", help=_("File or feature to search for"))
 		provides.set_defaults(func=self.handle_provides)
 
+		# requires
+		requires = subparsers.add_parser("requires",
+			help=_("Get a list of packages that require this dependency"))
+		requires.add_argument("pattern", required=True,
+			help=_("File or feature to search for"))
+		requires.set_defaults(func=self.handle_requires)
+
 		# reinstall
 		reinstall = subparsers.add_parser("reinstall",
 			help=_("Reinstall one or more packages"))
@@ -283,6 +290,11 @@ class Cli(object):
 			s = pkg.dump(long=long)
 			print(s)
 
+	def handle_requires(self, ns):
+		for pkg in self.pakfire(ns).whatrequires(ns.pattern):
+			s = pkg.dump(long=True)
+			print(s)
+
 	def handle_repolist(self, ns):
 		p = self.pakfire(ns)
 
diff --git a/src/scripts/pakfire-builder.in b/src/scripts/pakfire-builder.in
index b3a27a871..e2324f5fd 100644
--- a/src/scripts/pakfire-builder.in
+++ b/src/scripts/pakfire-builder.in
@@ -103,6 +103,13 @@ class Cli(object):
 			help=_("File or feature to search for"))
 		#provides.set_defaults(func=self._provides)
 
+		# requires
+		requires = subparsers.add_parser("requires",
+			help=_("Get a list of packages that require a given file or feature"))
+		requires.add_argument("pattern", required=True,
+			help=_("File or feature to search for"))
+		requires.set_defaults(func=self._requires)
+
 		# repolist
 		repolist = subparsers.add_parser("repolist",
 			help=_("List all currently enabled repositories"))
@@ -215,6 +222,11 @@ class Cli(object):
 			s = pkg.dump(long=True, filelist=ns.filelist)
 			print(s)
 
+	def _requires(self, ns):
+		for pkg in self.pakfire(ns).whatrequires(ns.pattern):
+			s = pkg.dump(long=True)
+			print(s)
+
 	def _repolist(self, ns):
 		"""
 			List all repositories