From e2b4c3882762406fd3da16f5865cfc3e36e048b5 Mon Sep 17 00:00:00 2001
From: Niall Sheridan <nsheridan@gmail.com>
Date: Wed, 1 Aug 2018 00:37:11 +0100
Subject: Migrate from esc to packr for static files

---
 .../github.com/gobuffalo/packr/builder/builder.go  | 168 +++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 vendor/github.com/gobuffalo/packr/builder/builder.go

(limited to 'vendor/github.com/gobuffalo/packr/builder/builder.go')

diff --git a/vendor/github.com/gobuffalo/packr/builder/builder.go b/vendor/github.com/gobuffalo/packr/builder/builder.go
new file mode 100644
index 0000000..c689500
--- /dev/null
+++ b/vendor/github.com/gobuffalo/packr/builder/builder.go
@@ -0,0 +1,168 @@
+package builder
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"sync"
+	"text/template"
+
+	"github.com/pkg/errors"
+	"golang.org/x/sync/errgroup"
+)
+
+var DebugLog func(string, ...interface{})
+
+func init() {
+	DebugLog = func(string, ...interface{}) {}
+}
+
+var invalidFilePattern = regexp.MustCompile(`(_test|-packr).go$`)
+
+// Builder scans folders/files looking for `packr.NewBox` and then compiling
+// the required static files into `<package-name>-packr.go` files so they can
+// be built into Go binaries.
+type Builder struct {
+	context.Context
+	RootPath       string
+	IgnoredBoxes   []string
+	IgnoredFolders []string
+	pkgs           map[string]pkg
+	moot           *sync.Mutex
+	Compress       bool
+}
+
+// Run the builder.
+func (b *Builder) Run() error {
+	wg := &errgroup.Group{}
+	root, err := filepath.EvalSymlinks(b.RootPath)
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	err = filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
+		if info == nil {
+			return filepath.SkipDir
+		}
+
+		base := strings.ToLower(filepath.Base(path))
+		if strings.HasPrefix(base, "_") {
+			return filepath.SkipDir
+		}
+		for _, f := range b.IgnoredFolders {
+			if strings.ToLower(f) == base {
+				return filepath.SkipDir
+			}
+		}
+		if !info.IsDir() {
+			wg.Go(func() error {
+				return b.process(path)
+			})
+		}
+		return nil
+	})
+	if err != nil {
+		return errors.WithStack(err)
+	}
+	if err := wg.Wait(); err != nil {
+		return errors.WithStack(err)
+	}
+	return b.dump()
+}
+
+func (b *Builder) dump() error {
+	for _, p := range b.pkgs {
+		name := filepath.Join(p.Dir, "a_"+p.Name+"-packr.go")
+		f, err := os.Create(name)
+		defer f.Close()
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		t, err := template.New("").Parse(tmpl)
+
+		if err != nil {
+			return errors.WithStack(err)
+		}
+		err = t.Execute(f, p)
+		if err != nil {
+			return errors.WithStack(err)
+		}
+	}
+	return nil
+}
+
+func (b *Builder) process(path string) error {
+	ext := filepath.Ext(path)
+	if ext != ".go" || invalidFilePattern.MatchString(path) {
+		return nil
+	}
+
+	v := newVisitor(path)
+	if err := v.Run(); err != nil {
+		return errors.WithStack(err)
+	}
+
+	pk := pkg{
+		Dir:   filepath.Dir(path),
+		Boxes: []box{},
+		Name:  v.Package,
+	}
+
+	for _, n := range v.Boxes {
+		var ignored bool
+		for _, i := range b.IgnoredBoxes {
+			if n == i {
+				// this is an ignored box
+				ignored = true
+				break
+			}
+		}
+		if ignored {
+			continue
+		}
+		bx := &box{
+			Name:     n,
+			Files:    []file{},
+			compress: b.Compress,
+		}
+		DebugLog("building box %s\n", bx.Name)
+		p := filepath.Join(pk.Dir, bx.Name)
+		if err := bx.Walk(p); err != nil {
+			return errors.WithStack(err)
+		}
+		if len(bx.Files) > 0 {
+			pk.Boxes = append(pk.Boxes, *bx)
+		}
+		DebugLog("built box %s with %q\n", bx.Name, bx.Files)
+	}
+
+	if len(pk.Boxes) > 0 {
+		b.addPkg(pk)
+	}
+	return nil
+}
+
+func (b *Builder) addPkg(p pkg) {
+	b.moot.Lock()
+	defer b.moot.Unlock()
+	if _, ok := b.pkgs[p.Name]; !ok {
+		b.pkgs[p.Name] = p
+		return
+	}
+	pp := b.pkgs[p.Name]
+	pp.Boxes = append(pp.Boxes, p.Boxes...)
+	b.pkgs[p.Name] = pp
+}
+
+// New Builder with a given context and path
+func New(ctx context.Context, path string) *Builder {
+	return &Builder{
+		Context:        ctx,
+		RootPath:       path,
+		IgnoredBoxes:   []string{},
+		IgnoredFolders: []string{"vendor", ".git", "node_modules", ".idea"},
+		pkgs:           map[string]pkg{},
+		moot:           &sync.Mutex{},
+	}
+}
-- 
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