d30ff6cfae
Instead of constantly making these updates, let's just remove the year since things are stored in git anyways, and this is not an actual modern legal risk anymore.
86 lines
3.1 KiB
Go
86 lines
3.1 KiB
Go
// Mgmt
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// Copyright (C) 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 <https://www.gnu.org/licenses/>.
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//
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// Additional permission under GNU GPL version 3 section 7
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//
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// If you modify this program, or any covered work, by linking or combining it
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// with embedded mcl code and modules (and that the embedded mcl code and
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// modules which link with this program, contain a copy of their source code in
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// the authoritative form) containing parts covered by the terms of any other
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// license, the licensors of this program grant you additional permission to
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// convey the resulting work. Furthermore, the licensors of this program grant
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// the original author, James Shubin, additional permission to update this
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// additional permission if he deems it necessary to achieve the goals of this
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// additional permission.
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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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"github.com/purpleidea/mgmt/util/errwrap"
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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("%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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// It would be great to ensure we didn't add any graph cycles here, but
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// instead of checking now, we'll move the check into the main loop.
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return nil
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}
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