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Merge pull request #247 from kevinrizza/semver-mode
Semver index insert
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package registry | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/blang/semver" | ||
| ) | ||
|
|
||
| // BundleGraphLoader generates updated graphs by adding bundles to them, updating | ||
| // the graph implicitly via semantic version of each bundle | ||
| type BundleGraphLoader struct { | ||
| } | ||
|
|
||
| // AddBundleToGraph takes a bundle and an existing graph and updates the graph to insert the new bundle | ||
| // into each channel it is included in | ||
| func (g *BundleGraphLoader) AddBundleToGraph(bundle *Bundle, graph *Package, newDefaultChannel string, skippatch bool) (*Package, error) { | ||
| bundleVersion, err := bundle.Version() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Unable to extract bundle version from bundle %s, can't insert in semver mode", bundle.BundleImage) | ||
| } | ||
|
|
||
| versionToAdd, err := semver.Make(bundleVersion) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Bundle version %s is not valid", bundleVersion) | ||
| } | ||
|
|
||
| newBundleKey := BundleKey{ | ||
| CsvName: bundle.Name, | ||
| Version: versionToAdd.String(), | ||
| BundlePath: bundle.BundleImage, | ||
| } | ||
|
|
||
| // initialize the graph if it started empty | ||
| if graph.Name == "" { | ||
| graph.Name = bundle.Package | ||
| } | ||
| if newDefaultChannel != "" { | ||
| graph.DefaultChannel = newDefaultChannel | ||
| } | ||
|
|
||
| // generate the DAG for each channel the new bundle is being insert into | ||
| for _, channel := range bundle.Channels { | ||
| replaces := make(map[BundleKey]struct{}, 0) | ||
|
|
||
| // If the channel doesn't exist yet, initialize it | ||
| if !graph.HasChannel(channel) { | ||
| // create the channel and add a single node | ||
| newChannelGraph := Channel{ | ||
| Head: newBundleKey, | ||
| Nodes: map[BundleKey]map[BundleKey]struct{}{ | ||
| newBundleKey: nil, | ||
| }, | ||
| } | ||
| if graph.Channels == nil { | ||
| graph.Channels = make(map[string]Channel, 1) | ||
| } | ||
| graph.Channels[channel] = newChannelGraph | ||
| continue | ||
| } | ||
|
|
||
| // find the version(s) it should sit between | ||
| channelGraph := graph.Channels[channel] | ||
| if channelGraph.Nodes == nil { | ||
| channelGraph.Nodes = make(map[BundleKey]map[BundleKey]struct{}, 1) | ||
| } | ||
|
|
||
| lowestAhead := BundleKey{} | ||
| greatestBehind := BundleKey{} | ||
| skipPatchCandidates := []BundleKey{} | ||
|
|
||
| // Iterate over existing nodes and compare the new node's version to find the | ||
| // lowest version above it and highest version below it (to insert between these nodes) | ||
| for node := range channelGraph.Nodes { | ||
| nodeVersion, err := semver.Make(node.Version) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Unable to parse existing bundle version stored in index %s %s %s", | ||
| node.CsvName, node.Version, node.BundlePath) | ||
| } | ||
|
|
||
| switch comparison := nodeVersion.Compare(versionToAdd); comparison { | ||
| case 0: | ||
| return nil, fmt.Errorf("Bundle version %s already added to index", bundleVersion) | ||
| case 1: | ||
| if lowestAhead.IsEmpty() { | ||
| lowestAhead = node | ||
| } else { | ||
| lowestAheadSemver, _ := semver.Make(lowestAhead.Version) | ||
| if nodeVersion.LT(lowestAheadSemver) { | ||
| lowestAhead = node | ||
| } | ||
| } | ||
| case -1: | ||
| if greatestBehind.IsEmpty() { | ||
| greatestBehind = node | ||
| } else { | ||
| greatestBehindSemver, _ := semver.Make(greatestBehind.Version) | ||
| if nodeVersion.GT(greatestBehindSemver) { | ||
| greatestBehind = node | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // if skippatch mode is enabled, check each node to determine if z-updates should | ||
| // be replaced as well. Keep track of them to delete those nodes from the graph itself, | ||
| // just be aware of them for replacements | ||
| if skippatch { | ||
| if isSkipPatchCandidate(versionToAdd, nodeVersion) { | ||
| skipPatchCandidates = append(skipPatchCandidates, node) | ||
| replaces[node] = struct{}{} | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // If we found a node behind the one we're adding, make the new node replace it | ||
| if !greatestBehind.IsEmpty() { | ||
| replaces[greatestBehind] = struct{}{} | ||
| } | ||
|
|
||
| // If we found a node ahead of the one we're adding, make the lowest to replace | ||
| // the new node. If we didn't find a node semantically ahead, the new node is | ||
| // the new channel head | ||
| if !lowestAhead.IsEmpty() { | ||
| channelGraph.Nodes[lowestAhead] = map[BundleKey]struct{}{ | ||
| newBundleKey: struct{}{}, | ||
| } | ||
| } else { | ||
| channelGraph.Head = newBundleKey | ||
| } | ||
|
|
||
| if skippatch { | ||
| // Remove the nodes that are now being skipped by a new patch version update | ||
| for _, candidate := range skipPatchCandidates { | ||
| delete(channelGraph.Nodes, candidate) | ||
| } | ||
| } | ||
|
|
||
| // add the node and update the graph | ||
| channelGraph.Nodes[newBundleKey] = replaces | ||
| graph.Channels[channel] = channelGraph | ||
| } | ||
|
|
||
| return graph, nil | ||
| } | ||
|
|
||
| func isSkipPatchCandidate(version, toCompare semver.Version) bool { | ||
| return (version.Major == toCompare.Major) && (version.Minor == toCompare.Minor) && (version.Patch > toCompare.Patch) | ||
| } |
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