Poor man's go field refactoring tool

refactor.py

#!/usr/bin/env python3
import sys

if len(sys.argv) < 4:
    print(
        f"Usage: {sys.argv[0]} <Struct type name (no star)> <field name> <field type>"
    )
    sys.exit(1)

try:
    from pyperclip import copy
except ImportError:
    print("[WARN] pyperclip not installed, will not copy", file=sys.stderr)

    def copy(text):
        pass


struct_type = sys.argv[1]
name = sys.argv[2]
atype = sys.argv[3]
public = name[0].upper() + name[1:]
private = name[0].lower() + name[1:]

val = (
    """// <public> gets <private>
func (<sh> *<st>) <public>() <type> {
	<sh>.mu.Lock()
	defer <sh>.mu.Unlock()
	return <sh>.<private>
}

// Set<public> sets <private>
func (<sh> *<st>) Set<public>(val <type>) {
	<sh>.mu.Lock()
	defer <sh>.mu.Unlock()
	<sh>.<private> = val
}""".replace(
        "<sh>", struct_type.strip("*")[0].lower()
    )
    .replace("<st>", struct_type)
    .replace("<public>", public)
    .replace("<private>", private)
    .replace("<type>", atype)
)


print(val)
copy(val)