SubdirectoryFiles.md

Writing Files to Subdirectories

There's a small bug in our implementation where, when trying to write to a file in a subdirectory such as foo/bar.go, the file gets written to foo instead of creating the directory.

This should be fairly easy to fix by updating our Output files block to use a little help from the Go standard library path/filepath functions.

We'll get the directory of the string, and if it's not "." (filepath.Dir returns ".", not "" for empty paths) call os.MkdirAll on it in order to create the directory before creating the file.

for filename, codeblock := range files {
	if dir := filepath.Dir(string(filename)); dir != "." {
		if err := os.MkdirAll(dir, 0775); err != nil {
			fmt.Fprintf(os.Stderr, "%v\n", err)
		}
	}

	f, err := os.Create(string(filename))
	if err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
		continue
	}
	fmt.Fprintf(f, "%s", codeblock.Replace(""))
	// We don't defer this so that it'll get closed before the loop finishes.
	f.Close() 

}

"path/filepath"