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gopathname

Checking if a file is in a given directory

I've got a situation where I'd like to check whether a particular path lands inside of a particular directory. My first instinct was to do something like

filepath.HasPrefix(filepath.Clean(path), dir)

but the procedure filepath.HasPrefix is documented as existing for historic reasons only. Am I going to get the same effect by using strings.HasPrefix, or is there something I'm missing?

Solution

  • You're not missing anything, look at the source:

    // HasPrefix exists for historical compatibility and should not be used.
func HasPrefix(p, prefix string) bool {
    return strings.HasPrefix(p, prefix)
}

    Just use strings.HasPrefix(p, prefix) directly.