component: Automatically determine names

internal/component/component.go

@@ -10,20 +10,11 @@ package component
 //
 // Components are initialized using a [Pool].
 type Component interface {
-	// Name returns the name of this component.
-	// It should correspond to the appropriate subpackage.
+	// Name returns the name of this component
+	// Name should be implemented by the [ComponentBase] struct.
 	Name() string
 
-	// getBase returns the embedded ComponentBase struct.
-	getBase() *ComponentBase
-}
-
-// ComponentBase should be embedded into every component
-type ComponentBase struct {
-	Core // the underlying stillage of the distillery
-}
-
-//lint:ignore U1000 used to implement the private methods of [Component]
-func (cb *ComponentBase) getBase() *ComponentBase {
-	return cb
+	// getComponentBase returns the underlying ComponentBase object of this Component.
+	// It is used internally during initialization
+	getComponentBase() *ComponentBase
 }

internal/component/control/control.go

@@ -16,12 +16,8 @@ type Control struct {
 	Servables []component.Servable
 }
 
-func (control Control) Name() string {
-	return "dis" // TODO: Rename this to control!
-}
-
 func (control Control) Path() string {
-	return filepath.Join(control.Core.Config.DeployRoot, "core", control.Name())
+	return filepath.Join(control.Still.Config.DeployRoot, "core", "dis")
 }
 
 //go:embed all:control control.env

internal/component/core.go

@@ -1,11 +0,0 @@
-package component
-
-import (
-	"github.com/FAU-CDI/wisski-distillery/internal/config"
-	"github.com/FAU-CDI/wisski-distillery/pkg/environment"
-)
-
-type Core struct {
-	Environment environment.Environment // environment to use for reading / writing to and from the distillery
-	Config      *config.Config          // the configuration of the distillery
-}

internal/component/exporter/exporter.go

@@ -27,8 +27,6 @@ type Exporter struct {
 	Backupable   []component.Backupable
 }
 
-func (Exporter) Name() string { return "snapshots" }
-
 // Path returns the path that contains all snapshot related data.
 func (dis *Exporter) Path() string {
 	return filepath.Join(dis.Config.DeployRoot, "snapshots")
@@ -74,7 +72,7 @@ func (*Exporter) newSnapshotName(prefix string) string {
 func (dis *Exporter) NewStagingDir(prefix string) (path string, err error) {
 	for path == "" || environment.IsExist(err) {
 		path = filepath.Join(dis.StagingPath(), dis.newSnapshotName(prefix))
-		err = dis.Core.Environment.Mkdir(path, environment.DefaultFilePerm)
+		err = dis.Still.Environment.Mkdir(path, environment.DefaultFilePerm)
 	}
 	if err != nil {
 		path = ""

internal/component/exporter/extras_bookkeeping.go

@@ -12,8 +12,6 @@ type Bookkeeping struct {
 	component.ComponentBase
 }
 
-func (Bookkeeping) Name() string { return "bookkeeping" }
-
 // SnapshotNeedsRunning returns if this Snapshotable requires a running instance.
 func (Bookkeeping) SnapshotNeedsRunning() bool { return false }
 

internal/component/exporter/extras_config.go

@@ -11,8 +11,6 @@ type Config struct {
 	component.ComponentBase
 }
 
-func (Config) Name() string { return "config" }
-
 func (*Config) BackupName() string {
 	return "config"
 }

internal/component/exporter/extras_filesystem.go

@@ -10,8 +10,6 @@ type Filesystem struct {
 	component.ComponentBase
 }
 
-func (Filesystem) Name() string { return "filesystem" }
-
 // SnapshotNeedsRunning returns if this Snapshotable requires a running instance.
 func (Filesystem) SnapshotNeedsRunning() bool { return false }
 

internal/component/exporter/extras_pathbuilders.go

@@ -13,8 +13,6 @@ type Pathbuilders struct {
 	Instances *instances.Instances
 }
 
-func (Pathbuilders) Name() string { return "pathbuilders" }
-
 func (Pathbuilders) SnapshotNeedsRunning() bool { return true }
 
 func (Pathbuilders) SnapshotName() string { return "pathbuilders" }

internal/component/exporter/logger/logger.go

@@ -15,8 +15,6 @@ type Logger struct {
 	SQL *sql.SQL
 }
 
-func (*Logger) Name() string { return "snapshots-log" }
-
 // For retrieves (and prunes) the ExportLog.
 // Slug determines if entries for Backups (empty slug)
 // or a specific Instance (non-empty slug) are returned.
@@ -48,7 +46,7 @@ func (log *Logger) Log() ([]models.Export, error) {
 
 	// partition out the exports that have been deleted!
 	parts := collection.Partition(exports, func(s models.Export) bool {
-		_, err := log.Core.Environment.Stat(s.Path)
+		_, err := log.Still.Environment.Stat(s.Path)
 		return !environment.IsNotExist(err)
 	})
 

internal/component/exporter/prune.go

@@ -18,7 +18,7 @@ func (exporter *Exporter) PruneExports(io stream.IOStream) error {
 	sPath := exporter.ArchivePath()
 
 	// list all the files
-	entries, err := exporter.Core.Environment.ReadDir(sPath)
+	entries, err := exporter.Still.Environment.ReadDir(sPath)
 	if err != nil {
 		return err
 	}
@@ -44,7 +44,7 @@ func (exporter *Exporter) PruneExports(io stream.IOStream) error {
 		path := filepath.Join(sPath, entry.Name())
 		io.Printf("Removing %s cause it is older than %d days", path, exporter.Config.MaxBackupAge)
 
-		if err := exporter.Core.Environment.Remove(path); err != nil {
+		if err := exporter.Still.Environment.Remove(path); err != nil {
 			return err
 		}
 	}

internal/component/home/home.go

@@ -24,8 +24,6 @@ type Home struct {
 	homeBytes     lazy.Lazy[[]byte]
 }
 
-func (*Home) Name() string { return "home" }
-
 func (*Home) Routes() []string { return []string{"/"} }
 
 func (home *Home) Handler(route string, context context.Context, io stream.IOStream) (http.Handler, error) {

internal/component/info/info.go

@@ -21,8 +21,6 @@ type Info struct {
 	SnapshotsLog *logger.Logger
 }
 
-func (Info) Name() string { return "control-info" }
-
 func (*Info) Routes() []string { return []string{"/dis/"} }
 
 func (info *Info) Handler(route string, context context.Context, io stream.IOStream) (http.Handler, error) {

internal/component/instances/instances.go

@@ -27,12 +27,8 @@ type Instances struct {
 	ExporterLog *logger.Logger
 }
 
-func (Instances) Name() string {
-	return "instances"
-}
-
 func (instances *Instances) Path() string {
-	return filepath.Join(instances.Core.Config.DeployRoot, instances.Name())
+	return filepath.Join(instances.Still.Config.DeployRoot, "instances")
 }
 
 // ErrWissKINotFound is returned when a WissKI is not found
@@ -45,7 +41,7 @@ var errSQL = exit.Error{
 
 // use uses the non-nil wisski instance with this instances
 func (instances *Instances) use(wisski *wisski.WissKI) {
-	wisski.Core = instances.Core
+	wisski.Core = instances.Still
 	wisski.SQL = instances.SQL
 	wisski.TS = instances.TS
 	wisski.Meta = instances.Meta

internal/component/instances/runtime.go

@@ -20,7 +20,7 @@ var runtimeResources embed.FS
 
 // Update installs or updates runtime components needed by this component.
 func (instances *Instances) Update(stream stream.IOStream) error {
-	err := unpack.InstallDir(instances.Core.Environment, instances.Config.RuntimeDir(), "runtime", runtimeResources, func(dst, src string) {
+	err := unpack.InstallDir(instances.Still.Environment, instances.Config.RuntimeDir(), "runtime", runtimeResources, func(dst, src string) {
 		stream.Printf("[copy]  %s\n", dst)
 	})
 	if err != nil {

internal/component/meta/meta.go

@@ -17,8 +17,6 @@ type Meta struct {
 	sc map[string]*Storage
 }
 
-func (*Meta) Name() string { return "metadata" }
-
 // Storage returns a Storage for the instance with the given slug.
 // When slug is nil, returns a global storage.
 func (meta *Meta) Storage(slug string) *Storage {

internal/component/pool.go

@@ -7,14 +7,16 @@ import (
 )
 
 type ComponentPool struct {
-	pool     lazy.Pool[Component, Core]
+	pool     lazy.Pool[Component, Still]
 	poolInit sync.Once
 }
 
 func (pool *ComponentPool) init() {
 	pool.poolInit.Do(func() {
-		pool.pool.Init = func(component Component, core Core) Component {
-			component.getBase().Core = core
+		pool.pool.Init = func(component Component, core Still) Component {
+			base := component.getComponentBase()
+			base.Still = core
+			base.name = nameOf(component)
 			return component
 		}
 	})
@@ -23,7 +25,7 @@ func (pool *ComponentPool) init() {
 type ComponentPoolContext = *lazy.PoolContext[Component]
 type ComponentAllFunc = func(context ComponentPoolContext) []Component
 
-func (pool *ComponentPool) All(core Core, init func(context ComponentPoolContext) []Component) []Component {
+func (pool *ComponentPool) All(core Still, init func(context ComponentPoolContext) []Component) []Component {
 	pool.init()
 	return pool.pool.All(core, init)
 }
@@ -43,7 +45,7 @@ func (pool *ComponentPool) All(core Core, init func(context ComponentPoolContext
 // Furthermore, the init function may not cause other components to be initialized.
 //
 // The init function may be nil, indicating that no additional initialization is required.
-func MakeComponent[C Component](context ComponentPoolContext, core Core, init func(component C)) C {
+func MakeComponent[C Component](context ComponentPoolContext, core Still, init func(component C)) C {
 	return lazy.Make(context, init)
 }
 
@@ -51,16 +53,16 @@ func MakeComponent[C Component](context ComponentPoolContext, core Core, init fu
 //
 // All should be the function of the core that initializes all components.
 // All should only make calls to [InitComponent].
-func ExportComponents[C Component](pool *ComponentPool, core Core, All ComponentAllFunc) []C {
+func ExportComponents[C Component](pool *ComponentPool, core Still, All ComponentAllFunc) []C {
 	pool.init()
-	return lazy.ExportComponents[Component, Core, C](&pool.pool, core, All)
+	return lazy.ExportComponents[Component, Still, C](&pool.pool, core, All)
 }
 
 // ExportComponent exports the first component that is a C from the pool.
 //
 // All should be the function of the core that initializes all components.
 // All should only make calls to [InitComponent].
-func ExportComponent[C Component](pool *ComponentPool, core Core, All ComponentAllFunc) C {
+func ExportComponent[C Component](pool *ComponentPool, core Still, All ComponentAllFunc) C {
 	pool.init()
-	return lazy.ExportComponent[Component, Core, C](&pool.pool, core, All)
+	return lazy.ExportComponent[Component, Still, C](&pool.pool, core, All)
 }

internal/component/resolver/resolver.go

@@ -26,8 +26,6 @@ type Resolver struct {
 	handler lazy.Lazy[wdresolve.ResolveHandler] // handler
 }
 
-func (*Resolver) Name() string { return "resolver" }
-
 func (resolver *Resolver) Routes() []string { return []string{"/go/", "/wisski/get/"} }
 
 func (resolver *Resolver) Handler(route string, context context.Context, io stream.IOStream) (http.Handler, error) {

internal/component/sql/connect.go

@@ -133,7 +133,7 @@ func (sql *SQL) network() string {
 		// this seems like a bit of a hack, but it works for now.
 		name = fmt.Sprintf("sql-network-%d", atomic.AddUint64(&proxyNameCounter, 1))
 		mysqldriver.RegisterDialContext(name, func(ctx context.Context, addr string) (net.Conn, error) {
-			return sql.Core.Environment.DialContext(ctx, network, addr)
+			return sql.Still.Environment.DialContext(ctx, network, addr)
 		})
 		return
 	})

internal/component/sql/sql.go

@@ -22,12 +22,8 @@ type SQL struct {
 	lazyNetwork lazy.Lazy[string]
 }
 
-func (*SQL) Name() string {
-	return "sql"
-}
-
 func (sql *SQL) Path() string {
-	return filepath.Join(sql.Core.Config.DeployRoot, "core", sql.Name())
+	return filepath.Join(sql.Still.Config.DeployRoot, "core", "sql")
 }
 
 func (*SQL) Context(parent component.InstallationContext) component.InstallationContext {

internal/component/ssh/ssh.go

@@ -12,15 +12,11 @@ type SSH struct {
 	component.ComponentBase
 }
 
-func (SSH) Name() string {
-	return "ssh"
+func (ssh *SSH) Path() string {
+	return filepath.Join(ssh.Still.Config.DeployRoot, "core", "ssh")
 }
 
-func (ssh SSH) Path() string {
-	return filepath.Join(ssh.Core.Config.DeployRoot, "core", ssh.Name())
-}
-
-func (SSH) Context(parent component.InstallationContext) component.InstallationContext {
+func (*SSH) Context(parent component.InstallationContext) component.InstallationContext {
 	return parent
 }
 

internal/component/static/static.go

@@ -15,8 +15,6 @@ type Static struct {
 	component.ComponentBase
 }
 
-func (*Static) Name() string { return "static" }
-
 func (*Static) Routes() []string { return []string{"/static/"} }
 
 //go:embed dist

internal/component/still.go

@@ -0,0 +1,36 @@
+package component
+
+import (
+	"reflect"
+	"strings"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/config"
+	"github.com/FAU-CDI/wisski-distillery/pkg/environment"
+)
+
+// ComponentBase is embedded into every Component
+type ComponentBase struct {
+	name  string // name is the name of this component
+	Still        // the underlying still of the distillery
+}
+
+//lint:ignore U1000 used to implement the private methods of [Component]
+func (cb *ComponentBase) getComponentBase() *ComponentBase {
+	return cb
+}
+
+func (cb ComponentBase) Name() string {
+	return cb.name
+}
+
+// nameOf returns the name of the given component
+func nameOf(component Component) string {
+	return strings.ToLower(reflect.TypeOf(component).Elem().Name())
+}
+
+// Still represents the central part of a distillery.
+// It is used inside the main distillery struct, as well as every component via [ComponentBase].
+type Still struct {
+	Environment environment.Environment // environment to use for reading / writing to and from the distillery
+	Config      *config.Config          // the configuration of the distillery
+}

internal/component/triplestore/triplestore.go

@@ -19,12 +19,8 @@ type Triplestore struct {
 	PollInterval time.Duration   // duration to wait for during wait
 }
 
-func (Triplestore) Name() string {
-	return "triplestore"
-}
-
-func (ts Triplestore) Path() string {
-	return filepath.Join(ts.Core.Config.DeployRoot, "core", ts.Name())
+func (ts *Triplestore) Path() string {
+	return filepath.Join(ts.Still.Config.DeployRoot, "core", "triplestore")
 }
 
 func (Triplestore) Context(parent component.InstallationContext) component.InstallationContext {

internal/component/web/web.go

@@ -15,16 +15,11 @@ type Web struct {
 	component.ComponentBase
 }
 
-func (Web) Name() string {
-	return "web"
+func (web *Web) Path() string {
+	return filepath.Join(web.Still.Config.DeployRoot, "core", "web")
 }
 
-func (web Web) Path() string {
-	res := filepath.Join(web.Core.Config.DeployRoot, "core", web.Name())
-	return res
-}
-
-func (Web) Context(parent component.InstallationContext) component.InstallationContext {
+func (*Web) Context(parent component.InstallationContext) component.InstallationContext {
 	return parent
 }
 

internal/dis/component.go

@@ -70,11 +70,11 @@ type initFunc = func(dis *Distillery, context component.ComponentPoolContext) co
 // manual initializes a component from the provided distillery.
 func manual[C component.Component](init func(component C)) initFunc {
 	return func(dis *Distillery, context component.ComponentPoolContext) component.Component {
-		return component.MakeComponent(context, dis.Core, init)
+		return component.MakeComponent(context, dis.Still, init)
 	}
 }
 
 // use is like r, but does not provided additional initialization
 func auto[C component.Component](dis *Distillery, context component.ComponentPoolContext) component.Component {
-	return component.MakeComponent[C](context, dis.Core, nil)
+	return component.MakeComponent[C](context, dis.Still, nil)
 }

internal/dis/distillery.go

@@ -19,7 +19,7 @@ import (
 // It is the main structure used to interact with different components.
 type Distillery struct {
 	// core holds the core of the distillery
-	component.Core
+	component.Still
 
 	// internal context for the distillery
 	context context.Context
@@ -54,7 +54,7 @@ func (dis *Distillery) Context() context.Context {
 func e[C component.Component](dis *Distillery) C {
 	return component.ExportComponent[C](
 		&dis.pool,
-		dis.Core,
+		dis.Still,
 		dis.register,
 	)
 }
@@ -62,7 +62,7 @@ func e[C component.Component](dis *Distillery) C {
 func ea[C component.Component](dis *Distillery) []C {
 	return component.ExportComponents[C](
 		&dis.pool,
-		dis.Core,
+		dis.Still,
 		dis.register,
 	)
 }

internal/dis/init.go

@@ -22,7 +22,7 @@ var errOpenConfig = exit.Error{
 func NewDistillery(params cli.Params, flags cli.Flags, req cli.Requirements) (dis *Distillery, err error) {
 	dis = &Distillery{
 		context: params.Context,
-		Core: component.Core{
+		Still: component.Still{
 			Environment: environment.Native{},
 		},
 		Upstream: Upstream{
@@ -38,7 +38,7 @@ func NewDistillery(params cli.Params, flags cli.Flags, req cli.Requirements) (di
 	if flags.InternalInDocker {
 		dis.Upstream.SQL = "sql:3306"
 		dis.Upstream.Triplestore = "triplestore:7200"
-		params.ConfigPath = dis.Core.Environment.GetEnv("CONFIG_PATH")
+		params.ConfigPath = dis.Still.Environment.GetEnv("CONFIG_PATH")
 	}
 
 	// if we don't need to load the config, there is nothing to do
@@ -56,7 +56,7 @@ func NewDistillery(params cli.Params, flags cli.Flags, req cli.Requirements) (di
 	}
 
 	// open the config file!
-	f, err := dis.Core.Environment.Open(params.ConfigPath)
+	f, err := dis.Still.Environment.Open(params.ConfigPath)
 	if err != nil {
 		return nil, errOpenConfig.WithMessageF(err)
 	}
@@ -66,6 +66,6 @@ func NewDistillery(params cli.Params, flags cli.Flags, req cli.Requirements) (di
 	dis.Config = &config.Config{
 		ConfigPath: cfg,
 	}
-	err = dis.Config.Unmarshal(dis.Core.Environment, f)
+	err = dis.Config.Unmarshal(dis.Still.Environment, f)
 	return
 }

internal/wisski/wisski.go

@@ -20,7 +20,7 @@ type WissKI struct {
 	DrupalPassword string
 
 	// references to components!
-	Core component.Core
+	Core component.Still
 	Meta *meta.Meta
 	TS   *triplestore.Triplestore
 	SQL  *sql.SQL