75 lines
1.4 KiB
Go
75 lines
1.4 KiB
Go
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// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
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// license. Its contents can be found at:
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// http://creativecommons.org/publicdomain/zero/1.0/
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package main
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import (
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"path"
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"fmt"
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"exec"
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"io"
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"os"
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"compress/gzip"
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)
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// If gofmt exists on the system, run it over the target file to
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// fix up the generated code. This is not necessary, just a convenience.
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func gofmt(file string) (err os.Error) {
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var prog string
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if prog = os.Getenv("GOBIN"); len(prog) == 0 {
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return
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}
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prog = path.Join(prog, "gofmt")
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cmd := exec.Command(prog, "-w", file)
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return cmd.Run()
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}
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// Translate the input file.
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// input -> gzip -> gowriter -> output.
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func translate(input, output, pkgname, funcname string) (err os.Error) {
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var fs, fd *os.File
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var gz *gzip.Compressor
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if fs, err = os.Open(input); err != nil {
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return
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}
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defer fs.Close()
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if fd, err = os.Create(output); err != nil {
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return
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}
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defer fd.Close()
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fmt.Fprintf(fd, `// auto generated from '%s'.
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package %s
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import ( "io"; "os"; "bytes"; "compress/gzip" )
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func %s() ([]byte, os.Error) {
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var gz *gzip.Decompressor
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var err os.Error
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if gz, err = gzip.NewReader(bytes.NewBuffer([]byte{`, input, pkgname, funcname)
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if gz, err = gzip.NewWriter(&GoWriter{Writer: fd}); err != nil {
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return
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}
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io.Copy(gz, fs)
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gz.Close()
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fmt.Fprint(fd, `
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})); err != nil {
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return nil, err
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}
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var b bytes.Buffer
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io.Copy(&b, gz)
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gz.Close()
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return b.Bytes(), nil}`)
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return
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}
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