cheat/internal/sheet/copy.go

52 lines
1.2 KiB
Go

package sheet
import (
"fmt"
"io"
"os"
"path"
)
// Copy copies a cheatsheet to a new location
func (s *Sheet) Copy(dest string) error {
// NB: while the `infile` has already been loaded and parsed into a `sheet`
// struct, we're going to read it again here. This is a bit wasteful, but
// necessary if we want the "raw" file contents (including the front-matter).
// This is because the frontmatter is parsed and then discarded when the file
// is loaded via `sheets.Load`.
infile, err := os.Open(s.Path)
if err != nil {
return fmt.Errorf("failed to open cheatsheet: %s, %v", s.Path, err)
}
defer infile.Close()
// create any necessary subdirectories
dirs := path.Dir(dest)
if dirs != "." {
if err := os.MkdirAll(dirs, 0755); err != nil {
return fmt.Errorf("failed to create directory: %s, %v", dirs, err)
}
}
// create the outfile
outfile, err := os.Create(dest)
if err != nil {
return fmt.Errorf("failed to create outfile: %s, %v", dest, err)
}
defer outfile.Close()
// copy file contents
_, err = io.Copy(outfile, infile)
if err != nil {
return fmt.Errorf(
"failed to copy file: infile: %s, outfile: %s, err: %v",
s.Path,
dest,
err,
)
}
return nil
}