github.com/keybase/client/go@v0.0.0-20240309051027-028f7c731f8b/release/github/file.go (about)

     1  // Modified from https://github.com/aktau/github-release/blob/master/file.go
     2  
     3  package github
     4  
     5  import (
     6  	"fmt"
     7  	"io"
     8  	"os"
     9  )
    10  
    11  func getFileSize(f *os.File) (int64, error) {
    12  	/* first try stat */
    13  	off, err := fsizeStat(f)
    14  	if err != nil {
    15  		/* if that fails, try seek */
    16  		return fsizeSeek(f)
    17  	}
    18  
    19  	return off, nil
    20  }
    21  
    22  func fsizeStat(f *os.File) (int64, error) {
    23  	fi, err := f.Stat()
    24  
    25  	if err != nil {
    26  		return 0, err
    27  	}
    28  
    29  	return fi.Size(), nil
    30  }
    31  
    32  func fsizeSeek(f io.Seeker) (int64, error) {
    33  	off, err := f.Seek(0, 2)
    34  	if err != nil {
    35  		return 0, fmt.Errorf("seeking did not work, stdin is not" +
    36  			"supported yet because github doesn't support chunking" +
    37  			"requests (and I haven't implemented detecting stdin and" +
    38  			"buffering yet")
    39  	}
    40  
    41  	_, err = f.Seek(0, 0)
    42  	if err != nil {
    43  		return 0, fmt.Errorf("could not seek back in the file")
    44  	}
    45  	return off, nil
    46  }