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file.go
45 lines (36 loc) · 854 Bytes
/
file.go
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// Modified from https://github.com/aktau/github-release/blob/master/file.go
package github
import (
"fmt"
"os"
)
func GetFileSize(f *os.File) (int64, error) {
/* first try stat */
off, err := fsizeStat(f)
if err != nil {
/* if that fails, try seek */
return fsizeSeek(f)
}
return off, nil
}
func fsizeStat(f *os.File) (int64, error) {
fi, err := f.Stat()
if err != nil {
return 0, err
}
return fi.Size(), nil
}
func fsizeSeek(f *os.File) (int64, error) {
off, err := f.Seek(0, 2)
if err != nil {
return 0, fmt.Errorf("seeking did not work, stdin is not" +
"supported yet because github doesn't support chunking" +
"requests (and I haven't implemented detecting stdin and" +
"buffering yet")
}
_, err = f.Seek(0, 0)
if err != nil {
return 0, fmt.Errorf("could not seek back in the file")
}
return off, nil
}