Remove duplicate rendertemplate code in vm test

go/dev/interactive.go

@@ -0,0 +1,49 @@
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"flag"
+	"fmt"
+	"strings"
+	"os"
+
+	"git.defalsify.org/festive/engine"
+)
+
+func main() {
+	var dir string
+	var root string
+	flag.StringVar(&dir, "d", ".", "resource dir to read from")
+	flag.StringVar(&root, "root", "root", "entry point symbol")
+	flag.Parse()
+	fmt.Fprintf(os.Stderr, "starting session at symbol '%s' using resource dir: %s\n", root, dir)
+
+	ctx := context.Background()
+	en := engine.NewDefaultEngine(dir)
+	err := en.Init("root", ctx)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "cannot init: %v\n", err)
+		os.Exit(1)
+	}
+
+	running := true
+	for running {
+		reader := bufio.NewReader(os.Stdin)
+		in, err := reader.ReadString('\n')
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "cannot read input: %v", err)
+			os.Exit(1)
+		}
+		in = strings.TrimSpace(in)
+		err = en.Exec([]byte(in), ctx)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "execution terminated: %v", err)
+			os.Exit(1)
+		}
+		b := bytes.NewBuffer(nil)
+		en.WriteResult(b)
+		fmt.Println(b.String())
+	}
+}

go/engine/default.go

@@ -0,0 +1,12 @@
+package engine
+
+import (
+	"git.defalsify.org/festive/state"
+	"git.defalsify.org/festive/resource"
+)
+
+func NewDefaultEngine(dir string) Engine {
+	st := state.NewState(0)
+	rs := resource.NewFsResource(dir)
+	return NewEngine(&st, &rs)
+}

go/engine/engine.go

@@ -43,6 +43,9 @@ func(en *Engine) Init(sym string, ctx context.Context) error {
 	if err != nil {
 		return err
 	}
+	if len(code) == 0 {
+		return fmt.Errorf("no code found at resource %s", en.rs)
+	}
 	return en.st.AppendCode(code)
 }
 

go/engine/engine_test.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"io/ioutil"
 	"path"
-	"text/template"
 	"testing"
 
 	"git.defalsify.org/festive/resource"
@@ -24,8 +23,8 @@ type FsWrapper struct {
 	st *state.State
 }
 
-func NewFsWrapper(path string, st *state.State, ctx context.Context) FsWrapper {
-	rs := resource.NewFsResource(path, ctx)
+func NewFsWrapper(path string, st *state.State) FsWrapper {
+	rs := resource.NewFsResource(path)
 	return FsWrapper {
 		&rs, 
 		st,
@@ -33,21 +32,7 @@ func NewFsWrapper(path string, st *state.State, ctx context.Context) FsWrapper {
 }
 
 func (r FsWrapper) RenderTemplate(sym string, values map[string]string) (string, error) {
-	v, err := r.GetTemplate(sym)
-	if err != nil {
-		return "", err
-	}
-	tp, err := template.New("tester").Option("missingkey=error").Parse(v)
-	if err != nil {
-		return "", err
-	}
-
-	b := bytes.NewBuffer([]byte{})
-	err = tp.Execute(b, values)
-	if err != nil {
-		return "", err
-	}
-	return b.String(), err
+	return resource.DefaultRenderTemplate(r, sym, values)	
 }
 
 func(fs FsWrapper) one(ctx context.Context) (string, error) {
@@ -84,7 +69,7 @@ func TestEngineInit(t *testing.T) {
 	st := state.NewState(17).WithCacheSize(1024)
 	generateTestData(t)
 	ctx := context.TODO()
-	rs := NewFsWrapper(dataDir, &st, ctx)
+	rs := NewFsWrapper(dataDir, &st)
 	en := NewEngine(&st, &rs)
 	err := en.Init("root", ctx)
 	if err != nil {

go/resource/fs.go

@@ -1,22 +1,24 @@
 package resource
 
 import (
-	"context"
 	"fmt"
 	"io/ioutil"
 	"path"
+	"path/filepath"
 	"strings"
 )
 
 type FsResource struct {
 	Path string
-	ctx context.Context
 }
 
-func NewFsResource(path string, ctx context.Context) (FsResource) {
+func NewFsResource(path string) (FsResource) {
+	absPath, err := filepath.Abs(path)
+	if err != nil {
+		panic(err)
+	}
 	return FsResource{
-		Path: path,
-		ctx: ctx,
+		Path: absPath,
 	}
 }
 
@@ -28,13 +30,19 @@ func(fs FsResource) GetTemplate(sym string) (string, error) {
 }
 
 func(fs FsResource) RenderTemplate(sym string, values map[string]string) (string, error) {
-	return "", nil
+	return DefaultRenderTemplate(&fs, sym, values)
 }
 
 func(fs FsResource) GetCode(sym string) ([]byte, error) {
-	return []byte{}, nil
+	fb := sym + ".bin"
+	fp := path.Join(fs.Path, fb)
+	return ioutil.ReadFile(fp)
 }
 
 func(fs FsResource) FuncFor(sym string) (EntryFunc, error) {
 	return nil, fmt.Errorf("not implemented")
 }
+
+func(rs FsResource) String() string {
+	return fmt.Sprintf("fs resource at path: %s", rs.Path)
+}

go/resource/fs_test.go

@@ -1,11 +1,10 @@
 package resource
 
 import (
-	"context"
 	"testing"
 )
 
 func TestNewFs(t *testing.T) {
-	n := NewFsResource("./testdata", context.TODO())
+	n := NewFsResource("./testdata")
 	_ = n
 }

go/resource/render.go

@@ -0,0 +1,24 @@
+package resource
+
+import (
+	"bytes"
+	"text/template"
+)
+
+func DefaultRenderTemplate(r Resource, sym string, values map[string]string) (string, error) {
+	v, err := r.GetTemplate(sym)
+	if err != nil {
+		return "", err
+	}
+	tp, err := template.New("tester").Option("missingkey=error").Parse(v)
+	if err != nil {
+		return "", err
+	}
+
+	b := bytes.NewBuffer([]byte{})
+	err = tp.Execute(b, values)
+	if err != nil {
+		return "", err
+	}
+	return b.String(), err
+}

go/vm/vm_test.go

@@ -6,10 +6,8 @@ import (
 	"fmt"
 	"log"
 	"testing"
-	"text/template"
 	
 	"git.defalsify.org/festive/resource"
-//	"git.defalsify.org/festive/router"
 	"git.defalsify.org/festive/state"
 )
 
@@ -53,21 +51,7 @@ func (r *TestResource) GetTemplate(sym string) (string, error) {
 }
 
 func (r *TestResource) RenderTemplate(sym string, values map[string]string) (string, error) {
-	v, err := r.GetTemplate(sym)
-	if err != nil {
-		return "", err
-	}
-	tp, err := template.New("tester").Option("missingkey=error").Parse(v)
-	if err != nil {
-		return "", err
-	}
-
-	b := bytes.NewBuffer([]byte{})
-	err = tp.Execute(b, values)
-	if err != nil {
-		return "", err
-	}
-	return b.String(), err
+	return resource.DefaultRenderTemplate(r, sym, values)
 }
 
 func (r *TestResource) FuncFor(sym string) (resource.EntryFunc, error) {