sodepends: fix listing binaries, check libdepends, libprovides

• This fixes the problem when a library is needed by multiple binaries in a package, and only the last binary was listed, because the previous list was overridden on every scan.
• Check the sonames provided by the package and compare it with provides=() specified in PKGBUILD. Warn if provided but not specified, error if specified but not provided.
• Check the sonames required by the package and compare it with depends=() specified in PKGBUILD. Warn if a package provides a requred soname but not specified, and if a specified soname is not needed.

Namcap/rules/sodepends.py

@@ -73,7 +73,7 @@ def scanlibs(fileobj, filename, custom_libs, liblist, libdepends, libprovides):
 				# We didn't know about the library, so add it for fail later
 				liblist[libname].add(filename)
 
-def finddepends(liblist, infos):
+def finddepends(liblist):
 	"""
 	Find packages owning a list of libraries
 
@@ -81,9 +81,11 @@ def finddepends(liblist, infos):
 	  dependlist -- a dictionary { package => set(libraries) }
 	  libdependlist -- a dictionary { soname => package }
 	  orphans -- the list of libraries without owners
+	  missing_provides -- the list of sonames without providers
 	"""
 	dependlist = defaultdict(set)
 	libdependlist = {}
+	missing_provides = {}
 
 	somatches = {}
 	actualpath = {}
@@ -118,10 +120,10 @@ def finddepends(liblist, infos):
 					if soname in stripped_provides:
 						libdependlist[soname] = pkg.name
 					else:
-						infos.append(("libdepends-missing-provides %s %s", (soname, pkg.name )))
+						missing_provides[soname] = pkg.name
 
 	orphans = list(knownlibs - foundlibs)
-	return dependlist, libdependlist, orphans
+	return dependlist, libdependlist, orphans, missing_provides
 
 def filllibcache():
 	var = subprocess.Popen('ldconfig -p', 
@@ -149,6 +151,7 @@ class SharedLibsRule(TarballRule):
 		libprovides = defaultdict(set)
 		dependlist = {}
 		libdependlist = {}
+		missing_provides = {}
 		filllibcache()
 		os.environ['LC_ALL'] = 'C'
 		pkg_so_files = ['/' + n for n in tar.getnames() if '.so' in n]
@@ -169,12 +172,16 @@ class SharedLibsRule(TarballRule):
 			f.close()
 
 		# Ldd all the files and find all the link and script dependencies
-		dependlist, libdependlist, orphans = finddepends(liblist, self.infos)
+		dependlist, libdependlist, orphans, missing_provides = finddepends(liblist)
 
 		# Handle "no package associated" errors
 		self.warnings.extend([("library-no-package-associated %s", i)
 			for i in orphans])
 
+		# Hanle when a required soname does not provided by the associated package yet
+		self.infos.extend([("libdepends-missing-provides %s %s", (i, missing_provides[i]))
+			for i in missing_provides])
+
 		# Print link-level deps
 		for pkg, libraries in dependlist.items():
 			if isinstance(libraries, set):