LoadAll significantly increases code size

[justfalter]

Compare the two:

The following compiles to 6.6MB w/ go1.22.5 on osx (arm64)

package main

import (
	"github.com/magiconair/properties"
)

func main() {
	_, err := properties.LoadFile("./config.properties", properties.UTF8)
	if err != nil {
		panic(err)
	}
}

The following compiles to 3.7MB:

package main

import (
	"github.com/magiconair/properties"
)

func main() {
	loader := &properties.Loader{Encoding: properties.UTF8}
	_, err := loader.LoadFile("./config.properties")
	if err != nil {
		panic(err)
	}
}

The reason for this is because properties.LoadFile funnels through Loader.LoadAll, which can load properties files from URLs, so net/http and everything gets pulled in.

[magiconair]

Hmm, changing this

// LoadFile reads a file into a Properties struct.
func LoadFile(filename string, enc Encoding) (*Properties, error) {
	l := &Loader{Encoding: enc}
	return l.LoadAll([]string{filename})
}

to this

// LoadFile reads a file into a Properties struct.
func LoadFile(filename string, enc Encoding) (*Properties, error) {
	l := &Loader{Encoding: enc}
	return l.LoadFile(filename)
}

would introduce a slight behavior change since LoadAll expands env vars but loader.LoadFile does not.