Avoid having a big big file

config.go

@@ -39,7 +39,8 @@ type Config struct {
 
 	// Output defines the output file for the generated code.
 	// If left empty, this defaults to 'bindata.go' in the current
-	// working directory.
+	// working directory and the current directory in case of having true
+	// to `Split` config.
 	Output string
 
 	// Prefix defines a regular expression which should used to strip
@@ -142,6 +143,12 @@ type Config struct {
 	Ignore  []*regexp.Regexp
 	Include []*regexp.Regexp
 
+	// Split the output into several files. Every embedded file is bound into
+	// a specific file, and a common file is also generated containing API and
+	// other common parts.
+	// If true, the output config is a directory and not a file.
+	Split bool
+
 	// MD5Checksum is a flag that, when set to true, indicates to calculate
 	// MD5 checksums for files.
 	MD5Checksum bool
@@ -154,7 +161,6 @@ func NewConfig() *Config {
 	c.NoMemCopy = false
 	c.NoCompress = false
 	c.Debug = false
-	c.Output = "./bindata.go"
 	c.Ignore = make([]*regexp.Regexp, 0)
 	c.Include = make([]*regexp.Regexp, 0)
 	return c
@@ -180,7 +186,11 @@ func (c *Config) validate() error {
 			return fmt.Errorf("Unable to determine current working directory")
 		}
 
-		c.Output = filepath.Join(cwd, "bindata.go")
+		if c.Split {
+			c.Output = cwd
+		} else {
+			c.Output = filepath.Join(cwd, "bindata.go")
+		}
 	}
 
 	stat, err := os.Lstat(c.Output)
@@ -201,8 +211,18 @@ func (c *Config) validate() error {
 		}
 	}
 
-	if stat != nil && stat.IsDir() {
-		return fmt.Errorf("Output path is a directory")
+	if stat != nil {
+		if c.Split {
+			if !stat.IsDir() {
+				return fmt.Errorf("Output path is not a directory")
+
+			}
+		} else {
+			if stat.IsDir() {
+				return fmt.Errorf("Output path is a directory")
+
+			}
+		}
 	}
 
 	return nil

convert.go

@@ -5,7 +5,6 @@
 package bindata
 
 import (
-	"bufio"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -37,76 +36,16 @@ func Translate(c *Config) error {
 		}
 	}
 
-	// Create output file.
-	fd, err := os.Create(c.Output)
-	if err != nil {
-		return err
-	}
-
-	defer fd.Close()
-
-	// Create a buffered writer for better performance.
-	bfd := bufio.NewWriter(fd)
-	defer bfd.Flush()
-
-	// Write the header. This makes e.g. Github ignore diffs in generated files.
-	if _, err = fmt.Fprint(bfd, "// Code generated by go-bindata.\n"); err != nil {
-		return err
-	}
-	if _, err = fmt.Fprint(bfd, "// sources:\n"); err != nil {
-		return err
-	}
-
 	wd, err := os.Getwd()
 	if err != nil {
 		return err
 	}
 
-	for _, asset := range toc {
-		relative, _ := filepath.Rel(wd, asset.Path)
-		if _, err = fmt.Fprintf(bfd, "// %s\n", filepath.ToSlash(relative)); err != nil {
-			return err
-		}
-	}
-	if _, err = fmt.Fprint(bfd, "// DO NOT EDIT!\n\n"); err != nil {
-		return err
-	}
-
-	// Write build tags, if applicable.
-	if len(c.Tags) > 0 {
-		if _, err = fmt.Fprintf(bfd, "// +build %s\n\n", c.Tags); err != nil {
-			return err
-		}
-	}
-
-	// Write package declaration.
-	_, err = fmt.Fprintf(bfd, "package %s\n\n", c.Package)
-	if err != nil {
-		return err
-	}
-
-	// Write assets.
-	if c.Debug || c.Dev {
-		err = writeDebug(bfd, c, toc)
-	} else {
-		err = writeRelease(bfd, c, toc)
-	}
-
-	if err != nil {
-		return err
-	}
-
-	// Write table of contents
-	if err := writeTOC(bfd, toc); err != nil {
-		return err
-	}
-	// Write hierarchical tree of assets
-	if err := writeTOCTree(bfd, toc); err != nil {
-		return err
+	if c.Split {
+		return translateToDir(c, toc, wd)
 	}
 
-	// Write restore procedure
-	return writeRestore(bfd)
+	return translateToFile(c, toc, wd)
 }
 
 // ByName implement sort.Interface for []os.FileInfo based on Name()

convert_to_dir.go

@@ -0,0 +1,141 @@
+package bindata
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// translateToDir generates splited file
+func translateToDir(c *Config, toc []Asset, wd string) error {
+	if err := generateCommonFile(c, toc); err != nil {
+		return err
+	}
+
+	for i := range toc {
+		if err := generateOneAsset(c, &toc[i], wd); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func generateCommonFile(c *Config, toc []Asset) error {
+	// Create output file.
+	fd, err := os.Create(filepath.Join(c.Output, "bindata.go"))
+	if err != nil {
+		return err
+	}
+
+	defer fd.Close()
+
+	// Create a buffered writer for better performance.
+	bfd := bufio.NewWriter(fd)
+	defer bfd.Flush()
+
+	// Write the header. This makes e.g. Github ignore diffs in generated files.
+	if _, err = fmt.Fprint(bfd, "// Code generated by go-bindata.\n"); err != nil {
+		return err
+	}
+
+	if _, err = fmt.Fprint(bfd, "// -- Common file --\n"); err != nil {
+		return err
+	}
+
+	if _, err = fmt.Fprint(bfd, "// DO NOT EDIT!\n\n"); err != nil {
+		return err
+	}
+
+	// Write build tags, if applicable.
+	if len(c.Tags) > 0 {
+		if _, err = fmt.Fprintf(bfd, "// +build %s\n\n", c.Tags); err != nil {
+			return err
+		}
+	}
+
+	// Write package declaration.
+	_, err = fmt.Fprintf(bfd, "package %s\n\n", c.Package)
+	if err != nil {
+		return err
+	}
+
+	// Write assets.
+	if c.Debug || c.Dev {
+		err = writeDebugHeader(bfd)
+	} else {
+		err = writeReleaseHeader(bfd, c)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	// Write table of contents
+	if err := writeTOC(bfd, toc); err != nil {
+		return err
+	}
+	// Write hierarchical tree of assets
+	if err := writeTOCTree(bfd, toc); err != nil {
+		return err
+	}
+
+	// Write restore procedure
+	return writeRestore(bfd)
+
+}
+
+func generateOneAsset(c *Config, a *Asset, wd string) error {
+	// Create output file.
+	fd, err := os.Create(filepath.Join(c.Output, a.Func + ".go"))
+	if err != nil {
+		return err
+	}
+
+	defer fd.Close()
+
+	// Create a buffered writer for better performance.
+	bfd := bufio.NewWriter(fd)
+	defer bfd.Flush()
+
+	// Write the header. This makes e.g. Github ignore diffs in generated files.
+	if _, err = fmt.Fprint(bfd, "// Code generated by go-bindata.\n"); err != nil {
+		return err
+	}
+
+	if _, err = fmt.Fprint(bfd, "// source: "); err != nil {
+		return err
+	}
+
+	relative, _ := filepath.Rel(wd, a.Path)
+	if _, err = fmt.Fprintln(bfd, filepath.ToSlash(relative)); err != nil {
+		return err
+	}
+
+	if _, err = fmt.Fprint(bfd, "// DO NOT EDIT!\n\n"); err != nil {
+		return err
+	}
+
+	// Write build tags, if applicable.
+	if len(c.Tags) > 0 {
+		if _, err = fmt.Fprintf(bfd, "// +build %s\n\n", c.Tags); err != nil {
+			return err
+		}
+	}
+
+	// Write package declaration.
+	_, err = fmt.Fprintf(bfd, "package %s\n\n", c.Package)
+	if err != nil {
+		return err
+	}
+
+	// Write assets.
+	if c.Debug || c.Dev {
+		err = writeOneFileDebug(bfd, c, a)
+	} else {
+		err = writeOneFileRelease(bfd, c, a)
+	}
+
+	return err
+}

convert_to_file.go

@@ -0,0 +1,77 @@
+package bindata
+
+import (
+	"os"
+	"bufio"
+	"fmt"
+	"path/filepath"
+)
+
+// translateToFile generates one single file
+func translateToFile(c *Config, toc []Asset, wd string) error {
+	// Create output file.
+	fd, err := os.Create(c.Output)
+	if err != nil {
+		return err
+	}
+
+	defer fd.Close()
+
+	// Create a buffered writer for better performance.
+	bfd := bufio.NewWriter(fd)
+	defer bfd.Flush()
+
+	// Write the header. This makes e.g. Github ignore diffs in generated files.
+	if _, err = fmt.Fprint(bfd, "// Code generated by go-bindata.\n"); err != nil {
+		return err
+	}
+	if _, err = fmt.Fprint(bfd, "// sources:\n"); err != nil {
+		return err
+	}
+
+	for _, asset := range toc {
+		relative, _ := filepath.Rel(wd, asset.Path)
+		if _, err = fmt.Fprintf(bfd, "// %s\n", filepath.ToSlash(relative)); err != nil {
+			return err
+		}
+	}
+	if _, err = fmt.Fprint(bfd, "// DO NOT EDIT!\n\n"); err != nil {
+		return err
+	}
+
+	// Write build tags, if applicable.
+	if len(c.Tags) > 0 {
+		if _, err = fmt.Fprintf(bfd, "// +build %s\n\n", c.Tags); err != nil {
+			return err
+		}
+	}
+
+	// Write package declaration.
+	_, err = fmt.Fprintf(bfd, "package %s\n\n", c.Package)
+	if err != nil {
+		return err
+	}
+
+	// Write assets.
+	if c.Debug || c.Dev {
+		err = writeDebug(bfd, c, toc)
+	} else {
+		err = writeRelease(bfd, c, toc)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	// Write table of contents
+	if err := writeTOC(bfd, toc); err != nil {
+		return err
+	}
+	// Write hierarchical tree of assets
+	if err := writeTOCTree(bfd, toc); err != nil {
+		return err
+	}
+
+	// Write restore procedure
+	return writeRestore(bfd)
+}