Don't check versioning for devel packages

Devel packages can't be trusted to sho their real provides. Pretend that
that the provide applies to all versions. In the rare case where the
dependency is unsatisfied pacman will refuse to install so no harm can
be caused.

dependencies.go

@@ -70,6 +70,16 @@ func splitDbFromName(pkg string) (string, string) {
 	return "", split[0]
 }
 
+func isDevelName(name string) bool {
+	for _, suffix := range []string{"git", "svn", "hg", "bzr", "nightly"} {
+		if strings.HasSuffix(name, suffix) {
+			return true
+		}
+	}
+
+	return strings.Contains(name, "-always-")
+}
+
 func getBases(pkgs map[string]*rpc.Pkg) map[string][]*rpc.Pkg {
 	bases := make(map[string][]*rpc.Pkg)
 
@@ -489,12 +499,14 @@ func checkVersions(dt *depTree) error {
 
 		addMapStringSlice(has, pkg.Name, pkg.Version)
 
-		for _, name := range pkg.Provides {
-			_name, _ver := splitNameFromDep(name)
-			if _ver != "" {
-				addMapStringSlice(has, _name, _ver)
-			} else {
-				delete(has, _name)
+		if !isDevelName(pkg.Name) {
+			for _, name := range pkg.Provides {
+				_name, _ver := splitNameFromDep(name)
+				if _ver != "" {
+					addMapStringSlice(has, _name, _ver)
+				} else {
+					delete(has, _name)
+				}
 			}
 		}
 	}