Files
mesh-host/internal/compositions/packages.go
T
jschoubben 5906e18028 Node-engine: a composition, its codec, digest and keys come from the node-engine client; the candidate answer and its limits from the seat's contract; the declared packages are the engine's own (H-2, H-3, ADR 0634 §1; issue 1966)
The engine's Composed keeps the catalogue's Plan and the declaration types and goes through nodeengineclient's codec; the fingerprint key part is meshcatalogclient's. The candidate answer is nodeengine.CandidateAnswer; the have still holds it through an interim JSON bridge (link.interimAnswers) until the Have group moves.

Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i
2026-11-05 15:10:45 +01:00

85 lines
2.7 KiB
Go

package compositions
import (
"encoding/json"
"fmt"
"sort"
seat "git.novox.be/novox/mesh-contracts/go/seats/nodeengine"
"git.novox.be/novox/mesh-sdk/go/declaration"
)
// PackagesBucket is the node-engine's state packages (the seat's state of the same name), one key per node.
const PackagesBucket = "mesh-host_" + seat.StatePackages
// DeclaredPackages is a node's key of `packages` from the compositions its engine composed for the node's wants:
// each resource of type package, by its name and whether it is declared absent, with the modules that declare it so,
// in the mirror's layout and order (names sorted, absent after present, modules sorted). A resource's module is the
// one it names, else its composition's, else the guess from its id (declaration.ModuleGuess); a package of no module
// lists none.
func DeclaredPackages(node string, comps []Composed) (seat.PackagesByNodeValue, error) {
by := map[packageKey]map[string]bool{}
for _, c := range comps {
for _, raw := range c.Resources {
var r struct {
ID string `json:"id"`
Type string `json:"type"`
Package string `json:"package"`
Absent bool `json:"absent"`
Module string `json:"module"`
}
if err := json.Unmarshal(raw, &r); err != nil {
return seat.PackagesByNodeValue{}, fmt.Errorf("compositions: a resource of %s's composition %q is not readable: %w", node, c.Module, err)
}
if r.Type != "package" || r.Package == "" {
continue
}
k := packageKey{r.Package, r.Absent}
if by[k] == nil {
by[k] = map[string]bool{}
}
module := r.Module
if module == "" {
module = c.Module
}
if module == "" {
module, _ = declaration.ModuleGuess(r.ID)
}
if module != "" {
by[k][module] = true
}
}
}
v := seat.PackagesByNodeValue{Node: node, Packages: []seat.PackagesByNodeValuePackagesItem{}}
for _, k := range sortedPackageKeys(by) {
modules := make([]string, 0, len(by[k]))
for m := range by[k] {
modules = append(modules, m)
}
sort.Strings(modules)
v.Packages = append(v.Packages, seat.PackagesByNodeValuePackagesItem{Package: k.name, Modules: modules, Absent: k.absent})
}
return v, nil
}
// packageKey is a package as the layout tells it apart: its name, and whether it is declared absent.
type packageKey struct {
name string
absent bool
}
// sortedPackageKeys is the keys of m by name, absent after present.
func sortedPackageKeys[V any](m map[packageKey]V) []packageKey {
keys := make([]packageKey, 0, len(m))
for k := range m {
keys = append(keys, k)
}
sort.Slice(keys, func(i, j int) bool {
if keys[i].name != keys[j].name {
return keys[i].name < keys[j].name
}
return !keys[i].absent && keys[j].absent
})
return keys
}