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server.go
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server.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package planning
import (
"context"
"namespacelabs.dev/foundation/internal/fnerrors"
"namespacelabs.dev/foundation/internal/parsing"
"namespacelabs.dev/foundation/internal/planning/compatibility"
"namespacelabs.dev/foundation/internal/protos"
"namespacelabs.dev/foundation/schema"
"namespacelabs.dev/foundation/std/cfg"
"namespacelabs.dev/foundation/std/pkggraph"
)
// Represents a server bound to an environment.
type Server struct {
Location pkggraph.Location
Package *pkggraph.Package
ComputePlanWith []*schema.Invocation
EvalStartup func(context.Context, pkggraph.Context, pkggraph.StartupInputs, []pkggraph.ValueWithPath) (*schema.StartupPlan, error)
env pkggraph.SealedContext // The environment this server instance is bound to.
entry *schema.Stack_Entry // The stack entry, i.e. all of the server's dependencies.
deps []*pkggraph.Package // List of parsed deps.
fragments []*schema.ServerFragment
}
func (t Server) Module() *pkggraph.Module { return t.Location.Module }
func (t Server) SealedContext() pkggraph.SealedContext { return t.env }
func (t Server) PackageName() schema.PackageName { return t.Location.PackageName }
func (t Server) RelPath() string { return t.Location.Rel() }
func (t Server) StackEntry() *schema.Stack_Entry { return t.entry }
func (t Server) Proto() *schema.Server { return t.entry.Server }
func (t Server) Name() string { return t.entry.Server.Name }
func (t Server) Framework() schema.Framework { return t.entry.Server.Framework }
func (t Server) Deps() []*pkggraph.Package { return t.deps }
func (t Server) PackageRef() *schema.PackageRef {
return schema.MakePackageRef(t.PackageName(), t.Name())
}
func (t Server) GetDep(pkg schema.PackageName) *pkggraph.Package {
for _, d := range t.deps {
if d.PackageName() == pkg {
return d
}
}
return nil
}
func RequireServer(ctx context.Context, env cfg.Context, pkgname schema.PackageName) (Server, error) {
return RequireServerWith(ctx, env, parsing.NewPackageLoader(env), pkgname)
}
func RequireServerWith(ctx context.Context, env cfg.Context, pl *parsing.PackageLoader, pkgname schema.PackageName) (Server, error) {
return makeServer(ctx, pl, env.Environment(), pkgname, func() pkggraph.SealedContext {
return pkggraph.MakeSealedContext(env, pl.Seal())
})
}
func RequireLoadedServer(ctx context.Context, e pkggraph.SealedContext, pkgname schema.PackageName) (Server, error) {
return makeServer(ctx, e, e.Environment(), pkgname, func() pkggraph.SealedContext {
return e
})
}
func makeServer(ctx context.Context, loader pkggraph.PackageLoader, env *schema.Environment, pkgname schema.PackageName, bind func() pkggraph.SealedContext) (Server, error) {
sealed, err := parsing.Seal(ctx, loader, pkgname, &parsing.SealHelper{
AdditionalServerDeps: func(fmwk schema.Framework) ([]schema.PackageName, error) {
var pkgs schema.PackageList
if handler, ok := parsing.FrameworkHandlers[fmwk]; ok {
pkgs.AddMultiple(handler.DevelopmentPackages()...)
}
return pkgs.PackageNames(), nil
},
})
if err != nil {
return Server{}, err
}
if sealed.ParsedPackage == nil || sealed.ParsedPackage.Server == nil {
return Server{}, fnerrors.NewWithLocation(pkgname, "not a server")
}
t := Server{
Location: sealed.ParsedPackage.Location,
env: bind(),
}
t.Package = sealed.ParsedPackage
t.entry = &schema.Stack_Entry{
Server: sealed.Result.Server,
Node: sealed.Result.Nodes,
ServerFragment: sealed.Result.ServerFragments,
}
t.deps = sealed.Deps
t.fragments = sealed.Result.ServerFragments
if err := compatibility.CheckCompatible(env, t.entry.Server); err != nil {
return Server{}, err
}
if t.Package.LegacyComputeStartup != nil {
t.EvalStartup = t.Package.LegacyComputeStartup.EvalStartup
}
t.ComputePlanWith = t.Package.ComputePlanWith
t.entry.ServerNaming = sealed.Result.Server.ServerNaming
if t.entry.ServerNaming == nil {
t.entry.ServerNaming = &schema.Naming{}
} else {
t.entry.ServerNaming = protos.Clone(t.entry.ServerNaming)
}
t.entry.ServerNaming.EnableNamespaceManaged = true
return t, nil
}
type Servers []Server
func (stack Servers) Packages() schema.PackageList {
var pl schema.PackageList
for _, s := range stack {
pl.Add(s.PackageName())
}
return pl
}