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.
72 lines
2.3 KiB
Go
72 lines
2.3 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 autogroup
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import (
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"fmt"
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"github.com/purpleidea/mgmt/engine"
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"github.com/purpleidea/mgmt/pgraph"
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errwrap "github.com/pkg/errors"
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)
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// AutoGroup is the mechanical auto group "runner" that runs the interface spec.
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// TODO: this algorithm may not be correct in all cases. replace if needed!
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func AutoGroup(ag engine.AutoGrouper, g *pgraph.Graph, debug bool, logf func(format string, v ...interface{})) error {
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logf("algorithm: %s...", ag.Name())
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if err := ag.Init(g); err != nil {
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return errwrap.Wrapf(err, "error running autoGroup(init)")
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}
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for {
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var v, w pgraph.Vertex
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v, w, err := ag.VertexNext() // get pair to compare
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if err != nil {
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return errwrap.Wrapf(err, "error running autoGroup(vertexNext)")
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}
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merged := false
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// save names since they change during the runs
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vStr := fmt.Sprintf("%v", v) // valid even if it is nil
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wStr := fmt.Sprintf("%v", w)
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if err := ag.VertexCmp(v, w); err != nil { // cmp ?
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if debug {
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logf("!GroupCmp for: %s into: %s", wStr, vStr)
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}
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// remove grouped vertex and merge edges (res is safe)
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} else if err := VertexMerge(g, v, w, ag.VertexMerge, ag.EdgeMerge); err != nil { // merge...
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logf("!VertexMerge for: %s into: %s", wStr, vStr)
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} else { // success!
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logf("success for: %s into: %s", wStr, vStr)
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merged = true // woo
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}
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// did these get used?
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if ok, err := ag.VertexTest(merged); err != nil {
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return errwrap.Wrapf(err, "error running autoGroup(vertexTest)")
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} else if !ok {
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break // done!
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}
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}
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return nil
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}
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