bindata/debug.go

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// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
// license. Its contents can be found at:
// http://creativecommons.org/publicdomain/zero/1.0/
package bindata
import (
"fmt"
"io"
)
// writeDebug writes the debug code file.
func writeDebug(w io.Writer, c *Config, toc []Asset) error {
err := writeDebugHeader(w)
if err != nil {
return err
}
for i := range toc {
err = writeDebugAsset(w, c, &toc[i])
if err != nil {
return err
}
}
return nil
}
// writeDebugHeader writes output file headers.
// This targets debug builds.
func writeDebugHeader(w io.Writer) error {
_, err := fmt.Fprintf(w, `import (
"fmt"
"io/ioutil"
"os"
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"path/filepath"
"strings"
)
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// bindataRead reads the given file from disk. It returns an error on failure.
func bindataRead(path, name string) ([]byte, error) {
buf, err := ioutil.ReadFile(path)
if err != nil {
err = fmt.Errorf("Error reading asset %%s at %%s: %%v", name, path, err)
}
return buf, err
}
type asset struct {
bytes []byte
info os.FileInfo
}
`)
return err
}
// writeDebugAsset write a debug entry for the given asset.
// A debug entry is simply a function which reads the asset from
// the original file (e.g.: from disk).
func writeDebugAsset(w io.Writer, c *Config, asset *Asset) error {
pathExpr := fmt.Sprintf("%q", asset.Path)
if c.Dev {
pathExpr = fmt.Sprintf("filepath.Join(rootDir, %q)", asset.Name)
}
_, err := fmt.Fprintf(w, `// %s reads file data from disk. It returns an error on failure.
func %s() (*asset, error) {
path := %s
name := %q
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bytes, err := bindataRead(path, name)
if err != nil {
return nil, err
}
fi, err := os.Stat(path)
if err != nil {
err = fmt.Errorf("Error reading asset info %%s at %%s: %%v", name, path, err)
}
a := &asset{bytes: bytes, info: fi}
return a, err
}
`, asset.Func, asset.Func, pathExpr, asset.Name)
return err
}