9969286224
This giant patch makes some much needed improvements to the code base. * The engine has been rewritten and lives within engine/graph/ * All of the common interfaces and code now live in engine/ * All of the resources are in one package called engine/resources/ * The Res API can use different "traits" from engine/traits/ * The Res API has been simplified to hide many of the old internals * The Watch & Process loops were previously inverted, but is now fixed * The likelihood of package cycles has been reduced drastically * And much, much more... Unfortunately, some code had to be temporarily removed. The remote code had to be taken out, as did the prometheus code. We hope to have these back in new forms as soon as possible.
127 lines
3.5 KiB
Go
127 lines
3.5 KiB
Go
// Mgmt
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// Copyright (C) 2013-2018+ James Shubin and the project contributors
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// Written by James Shubin <james@shubin.ca> and the project contributors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package engine
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import (
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"fmt"
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"github.com/purpleidea/mgmt/pgraph"
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)
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// ResCmp compares two resources by checking multiple aspects. This is the main
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// entry point for running all the compare steps on two resource.
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func ResCmp(r1, r2 Res) error {
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if r1.Kind() != r2.Kind() {
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return fmt.Errorf("kind differs")
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}
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if r1.Name() != r2.Name() {
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return fmt.Errorf("name differs")
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}
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if err := r1.Cmp(r2); err != nil {
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return err
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}
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// compare meta params for resources with auto edges
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r1e, ok1 := r1.(EdgeableRes)
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r2e, ok2 := r2.(EdgeableRes)
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if ok1 != ok2 {
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return fmt.Errorf("edgeable differs") // they must be different (optional)
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}
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if ok1 && ok2 {
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if r1e.AutoEdgeMeta().Cmp(r2e.AutoEdgeMeta()) != nil {
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return fmt.Errorf("autoedge differs")
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}
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}
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// compare meta params for resources with auto grouping
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r1g, ok1 := r1.(GroupableRes)
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r2g, ok2 := r2.(GroupableRes)
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if ok1 != ok2 {
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return fmt.Errorf("groupable differs") // they must be different (optional)
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}
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if ok1 && ok2 {
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if r1g.AutoGroupMeta().Cmp(r2g.AutoGroupMeta()) != nil {
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return fmt.Errorf("autogroup differs")
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}
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// if resources are grouped, are the groups the same?
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if i, j := r1g.GetGroup(), r2g.GetGroup(); len(i) != len(j) {
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return fmt.Errorf("autogroup groups differ")
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} else if len(i) > 0 { // trick the golinter
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// Sort works with Res, so convert the lists to that
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iRes := []Res{}
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for _, r := range i {
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res := r.(Res)
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iRes = append(iRes, res)
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}
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jRes := []Res{}
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for _, r := range j {
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res := r.(Res)
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jRes = append(jRes, res)
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}
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ix, jx := Sort(iRes), Sort(jRes) // now sort :)
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for k := range ix {
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// compare sub resources
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if err := ResCmp(ix[k], jx[k]); err != nil {
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return err
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}
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}
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}
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}
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return nil
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}
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// VertexCmpFn returns if two vertices are equivalent. It errors if they can't
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// be compared because one is not a vertex. This returns true if equal.
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// TODO: shouldn't the first argument be an `error` instead?
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func VertexCmpFn(v1, v2 pgraph.Vertex) (bool, error) {
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r1, ok := v1.(Res)
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if !ok {
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return false, fmt.Errorf("v1 is not a Res")
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}
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r2, ok := v2.(Res)
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if !ok {
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return false, fmt.Errorf("v2 is not a Res")
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}
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if ResCmp(r1, r2) != nil {
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return false, nil
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}
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return true, nil
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}
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// EdgeCmpFn returns if two edges are equivalent. It errors if they can't be
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// compared because one is not an edge. This returns true if equal.
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// TODO: shouldn't the first argument be an `error` instead?
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func EdgeCmpFn(e1, e2 pgraph.Edge) (bool, error) {
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edge1, ok := e1.(*Edge)
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if !ok {
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return false, fmt.Errorf("e1 is not an Edge")
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}
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edge2, ok := e2.(*Edge)
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if !ok {
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return false, fmt.Errorf("e2 is not an Edge")
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}
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return edge1.Cmp(edge2) == nil, nil
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}
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