#!/usr/bin/env nomsu -V4.11.12.8
#
    Tool to find and replace one tree with another.
    nomsu tools/replace.nom [-i] tree_to_replace replacement file1 file2 directory1 ...
    If "-i" is the first argument, replacements will be performed in-place. Otherwise, the
    upgraded code will be printed.
    
use "lib/os.nom"

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

barf "Deprecated."

if ((size of %args.extra_args) < 3):
    say "Usage: nomsu tools/replace.nom [-i] tree_to_replace replacement files..."
    lua> "os.exit(1)"

%pattern = ((%args.extra_args.1) parsed)
%replacement = ((%args.extra_args.2) parsed)
for %filename in %args.extra_args at %i:
    if (%i < 3): do next %i
    %file = (read file %filename)
    unless %file: barf "File does not exist: \%filename"
    %nomsu = (NomsuCode from (Source %filename 1 (size of %file)) %file)
    %tree = (%nomsu parsed)
    # TODO: fix this to use variable substitution
    %tree2 = (..)
        %tree::map (..)
            for %subtree:
                if (%subtree == %pattern):
                    return %replacement
    if (%tree2 == %tree):
        say "No changes in \%filename"
        do next %filename
    
    %text = ((%tree2 as nomsu)::text)
    when:
        %args."-i":
            say "Replaced in \%filename"
            write %text to file %filename
        
        else:
            say %text