Add js.Bundle

Fixes #12626

common/maps/scratch.go

@@ -107,6 +107,20 @@ func (c *Scratch) Get(key string) any {
 	return val
 }
 
+// GetOrCreate returns the value for the given key if it exists, or creates it
+// using the given func and stores that value in the map.
+// For internal use.
+func (c *Scratch) GetOrCreate(key string, create func() any) any {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if val, found := c.values[key]; found {
+		return val
+	}
+	val := create()
+	c.values[key] = val
+	return val
+}
+
 // Values returns the raw backing map. Note that you should just use
 // this method on the locally scoped Scratch instances you obtain via newScratch, not
 // .Page.Scratch etc., as that will lead to concurrency issues.

resources/resource_transformers/js/build.go

@@ -1,4 +1,4 @@
-// Copyright 2020 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. 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.
@@ -16,25 +16,20 @@ package js
 import (
 	"errors"
 	"fmt"
-	"io"
 	"os"
 	"path"
 	"path/filepath"
 	"regexp"
 	"strings"
 
-	"github.com/spf13/afero"
-
-	"github.com/gohugoio/hugo/hugofs"
-	"github.com/gohugoio/hugo/media"
-
+	"github.com/evanw/esbuild/pkg/api"
 	"github.com/gohugoio/hugo/common/herrors"
 	"github.com/gohugoio/hugo/common/text"
-
+	"github.com/gohugoio/hugo/hugofs"
 	"github.com/gohugoio/hugo/hugolib/filesystems"
-	"github.com/gohugoio/hugo/resources/internal"
+	"github.com/gohugoio/hugo/identity"
+	"github.com/spf13/afero"
 
-	"github.com/evanw/esbuild/pkg/api"
 	"github.com/gohugoio/hugo/resources"
 	"github.com/gohugoio/hugo/resources/resource"
 )
@@ -53,46 +48,47 @@ func New(fs *filesystems.SourceFilesystem, rs *resources.Spec) *Client {
 	}
 }
 
-type buildTransformation struct {
-	optsm map[string]any
-	c     *Client
+// ProcessExernal processes a resource with the user provided options.
+func (c *Client) ProcessExernal(res resources.ResourceTransformer, opts map[string]any) (resource.Resource, error) {
+	return res.Transform(
+		&buildTransformation{c: c, optsm: opts},
+	)
 }
 
-func (t *buildTransformation) Key() internal.ResourceTransformationKey {
-	return internal.NewResourceTransformationKey("jsbuild", t.optsm)
+// ProcessExernal processes a resource with the given options.
+func (c *Client) ProcessInternal(res resources.ResourceTransformer, opts Options) (resource.Resource, error) {
+	return res.Transform(
+		&buildTransformation{c: c, opts: opts},
+	)
 }
 
-func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx) error {
-	ctx.OutMediaType = media.Builtin.JavascriptType
+func (c *Client) BuildBundle(opts Options) error {
+	return c.build(opts, nil)
+}
 
-	opts, err := decodeOptions(t.optsm)
-	if err != nil {
-		return err
+// Note that transformCtx may be nil.
+func (c *Client) build(opts Options, transformCtx *resources.ResourceTransformationCtx) error {
+	dependencyManager := opts.DependencyManager
+	if transformCtx != nil {
+		dependencyManager = transformCtx.DependencyManager // TODO1
 	}
-
-	if opts.TargetPath != "" {
-		ctx.OutPath = opts.TargetPath
-	} else {
-		ctx.ReplaceOutPathExtension(".js")
+	if dependencyManager == nil {
+		dependencyManager = identity.NopManager
 	}
 
-	src, err := io.ReadAll(ctx.From)
-	if err != nil {
+	opts.ResolveDir = c.rs.Cfg.BaseConfig().WorkingDir // where node_modules gets resolved
+	opts.TsConfig = c.rs.ResolveJSConfigFile("tsconfig.json")
+
+	if err := opts.validate(); err != nil {
 		return err
 	}
 
-	opts.sourceDir = filepath.FromSlash(path.Dir(ctx.SourcePath))
-	opts.resolveDir = t.c.rs.Cfg.BaseConfig().WorkingDir // where node_modules gets resolved
-	opts.contents = string(src)
-	opts.mediaType = ctx.InMediaType
-	opts.tsConfig = t.c.rs.ResolveJSConfigFile("tsconfig.json")
-
 	buildOptions, err := toBuildOptions(opts)
 	if err != nil {
 		return err
 	}
 
-	buildOptions.Plugins, err = createBuildPlugins(ctx.DependencyManager, t.c, opts)
+	buildOptions.Plugins, err = createBuildPlugins(c, dependencyManager, opts)
 	if err != nil {
 		return err
 	}
@@ -113,7 +109,7 @@ func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx
 				return fmt.Errorf("inject: absolute paths not supported, must be relative to /assets")
 			}
 
-			m := resolveComponentInAssets(t.c.rs.Assets.Fs, impPath)
+			m := resolveComponentInAssets(c.rs.Assets.Fs, impPath)
 
 			if m == nil {
 				return fmt.Errorf("inject: file %q not found", ext)
@@ -138,7 +134,7 @@ func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx
 			}
 			path := loc.File
 			if path == stdinImporter {
-				path = ctx.SourcePath
+				path = transformCtx.SourcePath
 			}
 
 			errorMessage := msg.Text
@@ -154,7 +150,7 @@ func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx
 				f, err = hugofs.Os.Open(path)
 			} else {
 				var fi os.FileInfo
-				fi, err = t.c.sfs.Fs.Stat(path)
+				fi, err = c.sfs.Fs.Stat(path)
 				if err == nil {
 					m := fi.(hugofs.FileMetaInfo).Meta()
 					path = m.Filename
@@ -185,38 +181,37 @@ func (t *buildTransformation) Transform(ctx *resources.ResourceTransformationCtx
 		// Return 1, log the rest.
 		for i, err := range errors {
 			if i > 0 {
-				t.c.rs.Logger.Errorf("js.Build failed: %s", err)
+				c.rs.Logger.Errorf("js.Build failed: %s", err)
 			}
 		}
 
 		return errors[0]
 	}
 
-	if buildOptions.Sourcemap == api.SourceMapExternal {
-		content := string(result.OutputFiles[1].Contents)
-		symPath := path.Base(ctx.OutPath) + ".map"
-		re := regexp.MustCompile(`//# sourceMappingURL=.*\n?`)
-		content = re.ReplaceAllString(content, "//# sourceMappingURL="+symPath+"\n")
+	if transformCtx != nil {
+		if buildOptions.Sourcemap == api.SourceMapExternal {
+			content := string(result.OutputFiles[1].Contents)
+			symPath := path.Base(transformCtx.OutPath) + ".map"
+			re := regexp.MustCompile(`//# sourceMappingURL=.*\n?`)
+			content = re.ReplaceAllString(content, "//# sourceMappingURL="+symPath+"\n")
 
-		if err = ctx.PublishSourceMap(string(result.OutputFiles[0].Contents)); err != nil {
-			return err
-		}
-		_, err := ctx.To.Write([]byte(content))
-		if err != nil {
-			return err
-		}
-	} else {
-		_, err := ctx.To.Write(result.OutputFiles[0].Contents)
-		if err != nil {
-			return err
+			if err = transformCtx.PublishSourceMap(string(result.OutputFiles[0].Contents)); err != nil {
+				return err
+			}
+			_, err := transformCtx.To.Write([]byte(content))
+			if err != nil {
+				return err
+			}
+		} else {
+			_, err := transformCtx.To.Write(result.OutputFiles[0].Contents)
+			if err != nil {
+				return err
+			}
 		}
+
+		return nil
 	}
-	return nil
-}
 
-// Process process esbuild transform
-func (c *Client) Process(res resources.ResourceTransformer, opts map[string]any) (resource.Resource, error) {
-	return res.Transform(
-		&buildTransformation{c: c, optsm: opts},
-	)
+	// TODO1
+	return nil
 }