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529 lines
15 KiB
Perl
529 lines
15 KiB
Perl
#!/usr/bin/env perl
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package InteractiveEdit;
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use 5.020;
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use warnings;
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use strict;
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use feature qw(switch signatures);
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no warnings qw(experimental::smartmatch experimental::signatures);
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use LWP::UserAgent;
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use FindBin qw($RealBin);
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use Text::Balanced qw(extract_delimited);
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use parent qw(Exporter);
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our @EXPORT = qw(interactive_edit);
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sub interactive_edit($self) {
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my $code = $self->{code};
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print " code: [$code]\n" if $self->{debug};
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my $subcode = $code;
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while ($subcode =~ s/^\s*(-[^ ]+)\s*//) {}
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my $copy_code;
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if ($subcode =~ s/^\s*copy\s+(\S+)\s*//) {
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my $copy = $1;
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my @code = load_history("$RealBin/../history/$copy-$self->{lang}.hist");
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$copy_code = $code[0];
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if (not defined $copy_code) {
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print "No history for $copy.\n";
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exit 0;
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}
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$code = $copy_code;
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$self->{only_show} = 1;
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$self->{copy_code} = 1;
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}
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if ($subcode =~ m/^\s*(?:and\s+)?(?:diff|show)\s+(\S+)\s*$/) {
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$self->{channel} = $1;
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}
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my @last_code = load_history("$RealBin/../history/$self->{channel}-$self->{lang}.hist");
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unshift @last_code, $copy_code if defined $copy_code;
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if ($subcode =~ m/^\s*(?:and\s+)?show(?:\s+\S+)?\s*$/i) {
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if (defined $last_code[0]) {
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print "$last_code[0]\n";
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} else {
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print "No recent code to show.\n"
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}
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exit 0;
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}
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my $prevchange = $last_code[0];
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my @replacements;
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my $got_changes = 0;
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my $got_sub = 0;
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my $got_diff = 0;
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my $got_undo = 0;
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my $last_keyword;
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while ($subcode =~ s/^\s*(and)?\s*undo//) {
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splice @last_code, 0, 1;
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if (not defined $last_code[0]) {
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print "No more undos remaining.\n";
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exit 0;
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} else {
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$code = $last_code[0];
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$prevchange = $last_code[0];
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$got_undo = 1;
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}
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}
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while (1) {
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$got_sub = 0;
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$subcode =~ s/^\s*and\s+'/and $last_keyword '/ if defined $last_keyword;
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if ($subcode =~ m/^\s*(?:and\s+)?diff\b/i) {
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$got_diff = 1;
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last;
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}
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if ($subcode =~ m/^\s*(?:and\s+)?(again|run|paste)\b/i) {
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$self->{got_run} = lc $1;
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$self->{only_show} = 0;
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if ($prevchange) {
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$code = $prevchange;
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} else {
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print "No recent code to $self->{got_run}.\n";
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exit 0;
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}
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}
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if ($subcode =~ m/^\s*(and)?\s*remove \s*([^']+)?\s*'/) {
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$last_keyword = 'remove';
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my $modifier = 'first';
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$subcode =~ s/^\s*(and)?\s*//;
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$subcode =~ s/remove\s*([^']+)?\s*//i;
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$modifier = $1 if defined $1;
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$modifier =~ s/\s+$//;
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my ($e, $r) = extract_delimited($subcode, "'");
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my $text;
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if (defined $e) {
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$text = $e;
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$text =~ s/^'//;
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$text =~ s/'$//;
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$subcode = "replace $modifier '$text' with ''$r";
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} else {
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print "Unbalanced single quotes. Usage: cc remove [all, first, .., tenth, last] 'text' [and ...]\n";
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exit 0;
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}
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next;
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}
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if ($subcode =~ s/^\s*(and)?\s*prepend '//) {
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$last_keyword = 'prepend';
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$subcode = "'$subcode";
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my ($e, $r) = extract_delimited($subcode, "'");
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my $text;
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if (defined $e) {
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$text = $e;
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$text =~ s/^'//;
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$text =~ s/'$//;
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$subcode = $r;
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$got_sub = 1;
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$got_changes = 1;
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if (not defined $prevchange) {
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print "No recent code to prepend to.\n";
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exit 0;
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}
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$code = $prevchange;
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$code =~ s/^/$text /;
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$prevchange = $code;
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} else {
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print "Unbalanced single quotes. Usage: cc prepend 'text' [and ...]\n";
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exit 0;
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}
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next;
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}
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if ($subcode =~ s/^\s*(and)?\s*append '//) {
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$last_keyword = 'append';
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$subcode = "'$subcode";
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my ($e, $r) = extract_delimited($subcode, "'");
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my $text;
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if (defined $e) {
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$text = $e;
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$text =~ s/^'//;
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$text =~ s/'$//;
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$subcode = $r;
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$got_sub = 1;
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$got_changes = 1;
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if (not defined $prevchange) {
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print "No recent code to append to.\n";
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exit 0;
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}
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$code = $prevchange;
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$code =~ s/$/ $text/;
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$prevchange = $code;
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} else {
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print "Unbalanced single quotes. Usage: cc append 'text' [and ...]\n";
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exit 0;
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}
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next;
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}
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if ($subcode =~ m/^\s*(and)?\s*replace\s*([^']+)?\s*'.*'\s*with\s*'.*?'/i) {
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$last_keyword = 'replace';
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$got_sub = 1;
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my $modifier = 'first';
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$subcode =~ s/^\s*(and)?\s*//;
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$subcode =~ s/replace\s*([^']+)?\s*//i;
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$modifier = $1 if defined $1;
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$modifier =~ s/\s+$//;
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my ($from, $to);
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my ($e, $r) = extract_delimited($subcode, "'");
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if (defined $e) {
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$from = $e;
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$from =~ s/^'//;
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$from =~ s/'$//;
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$from = quotemeta $from;
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$from =~ s/\\ / /g;
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$subcode = $r;
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$subcode =~ s/\s*with\s*//i;
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} else {
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print "Unbalanced single quotes. Usage: cc replace 'from' with 'to' [and ...]\n";
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exit 0;
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}
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($e, $r) = extract_delimited($subcode, "'");
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if (defined $e) {
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$to = $e;
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$to =~ s/^'//;
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$to =~ s/'$//;
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$subcode = $r;
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} else {
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print "Unbalanced single quotes. Usage: cc replace 'from' with 'to' [and replace ... with ... [and ...]]\n";
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exit 0;
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}
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given($modifier) {
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when($_ eq 'all' ) {}
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when($_ eq 'last' ) {}
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when($_ eq 'first' ) { $modifier = 1; }
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when($_ eq 'second' ) { $modifier = 2; }
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when($_ eq 'third' ) { $modifier = 3; }
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when($_ eq 'fourth' ) { $modifier = 4; }
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when($_ eq 'fifth' ) { $modifier = 5; }
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when($_ eq 'sixth' ) { $modifier = 6; }
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when($_ eq 'seventh') { $modifier = 7; }
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when($_ eq 'eighth' ) { $modifier = 8; }
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when($_ eq 'nineth' ) { $modifier = 9; }
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when($_ eq 'tenth' ) { $modifier = 10; }
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default { print "Bad replacement modifier '$modifier'; valid modifiers are 'all', 'first', 'second', ..., 'tenth', 'last'\n"; exit 0; }
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}
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my $replacement = {};
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$replacement->{'from'} = $from;
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$replacement->{'to'} = $to;
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$replacement->{'modifier'} = $modifier;
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push @replacements, $replacement;
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next;
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}
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if ($subcode =~ m/^\s*(and)?\s*s\/.*\//) {
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$last_keyword = undef;
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$got_sub = 1;
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$subcode =~ s/^\s*(and)?\s*s//;
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my ($regex, $to);
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my ($e, $r) = extract_delimited($subcode, '/');
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if (defined $e) {
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$regex = $e;
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$regex =~ s/^\///;
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$regex =~ s/\/$//;
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$subcode = "/$r";
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} else {
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print "Unbalanced slashes. Usage: cc s/regex/substitution/[gi] [and s/.../.../ [and ...]]\n";
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exit 0;
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}
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($e, $r) = extract_delimited($subcode, '/');
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if (defined $e) {
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$to = $e;
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$to =~ s/^\///;
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$to =~ s/\/$//;
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$subcode = $r;
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} else {
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print "Unbalanced slashes. Usage: cc s/regex/substitution/[gi] [and s/.../.../ [and ...]]\n";
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exit 0;
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}
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my $suffix;
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$suffix = $1 if $subcode =~ s/^([^ ]+)//;
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if (length $suffix and $suffix =~ m/[^gi]/) {
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print "Bad regex modifier '$suffix'. Only 'i' and 'g' are allowed.\n";
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exit 0;
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}
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if (defined $prevchange) {
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$code = $prevchange;
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} else {
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print "No recent code to change.\n";
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exit 0;
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}
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my $ret = eval {
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my ($ret, $a, $b, $c, $d, $e, $f, $g, $h, $i, $before, $after);
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if (not length $suffix) {
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$ret = $code =~ s|$regex|$to|;
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($a, $b, $c, $d, $e, $f, $g, $h, $i) = ($1, $2, $3, $4, $5, $6, $7, $8, $9);
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$before = $`;
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$after = $';
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} elsif ($suffix =~ /^i$/) {
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$ret = $code =~ s|$regex|$to|i;
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($a, $b, $c, $d, $e, $f, $g, $h, $i) = ($1, $2, $3, $4, $5, $6, $7, $8, $9);
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$before = $`;
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$after = $';
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} elsif ($suffix =~ /^g$/) {
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$ret = $code =~ s|$regex|$to|g;
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($a, $b, $c, $d, $e, $f, $g, $h, $i) = ($1, $2, $3, $4, $5, $6, $7, $8, $9);
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$before = $`;
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$after = $';
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} elsif ($suffix =~ /^ig$/ or $suffix =~ /^gi$/) {
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$ret = $code =~ s|$regex|$to|gi;
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($a, $b, $c, $d, $e, $f, $g, $h, $i) = ($1, $2, $3, $4, $5, $6, $7, $8, $9);
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$before = $`;
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$after = $';
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}
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if ($ret) {
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$code =~ s/\$1/$a/g;
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$code =~ s/\$2/$b/g;
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$code =~ s/\$3/$c/g;
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$code =~ s/\$4/$d/g;
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$code =~ s/\$5/$e/g;
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$code =~ s/\$6/$f/g;
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$code =~ s/\$7/$g/g;
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$code =~ s/\$8/$h/g;
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$code =~ s/\$9/$i/g;
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$code =~ s/\$`/$before/g;
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$code =~ s/\$'/$after/g;
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}
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return $ret;
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};
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if ($@) {
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my $error = $@;
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$error =~ s/ at .* line \d+\.\s*$//;
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print "$error\n";
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exit 0;
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}
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if ($ret) {
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$got_changes = 1;
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}
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$prevchange = $code;
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}
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if ($got_sub and not $got_changes) {
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print "No substitutions made.\n";
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exit 0;
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} elsif ($got_sub and $got_changes) {
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next;
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}
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last;
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}
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if (@replacements) {
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use re::engine::RE2 -strict => 1;
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@replacements = sort { $a->{'from'} cmp $b->{'from'} or $a->{'modifier'} <=> $b->{'modifier'} } @replacements;
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my ($previous_from, $previous_modifier);
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foreach my $replacement (@replacements) {
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my $from = $replacement->{'from'};
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my $to = $replacement->{'to'};
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my $modifier = $replacement->{'modifier'};
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if (defined $previous_from) {
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if ($previous_from eq $from and $previous_modifier =~ /^\d+$/) {
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$modifier -= $modifier - $previous_modifier;
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}
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}
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if (defined $prevchange) {
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$code = $prevchange;
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} else {
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print "No recent code to change.\n";
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exit 0;
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}
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my $ret = eval {
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my $got_change;
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my ($first_char, $last_char, $first_bound, $last_bound);
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$first_char = $1 if $from =~ m/^(.)/;
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$last_char = $1 if $from =~ m/(.)$/;
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if ($first_char =~ /\W/) {
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$first_bound = '.?';
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} else {
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$first_bound = '\b';
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}
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if ($last_char =~ /\W/) {
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$last_bound = '.?';
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} else {
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$last_bound = '\b';
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}
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if ($modifier eq 'all') {
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if ($code =~ s/($first_bound)$from($last_bound)/$1$to$2/g) {
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$got_change = 1;
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}
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} elsif ($modifier eq 'last') {
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if ($code =~ s/(.*)($first_bound)$from($last_bound)/$1$2$to$3/) {
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$got_change = 1;
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}
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} else {
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my $count = 0;
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my $unescaped = $from;
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$unescaped =~ s/\\//g;
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if ($code =~ s/($first_bound)$from($last_bound)/if (++$count == $modifier) { "$1$to$2"; } else { "$1$unescaped$2"; }/ge) {
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$got_change = 1;
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}
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}
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return $got_change;
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};
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if ($@) {
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my $error = $@;
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$error =~ s/ at .* line \d+\.\s*$//;
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print "$error\n";
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exit 0;
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}
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if ($ret) {
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$got_sub = 1;
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$got_changes = 1;
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}
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$prevchange = $code;
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$previous_from = $from;
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$previous_modifier = $modifier;
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}
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if (not $got_changes) {
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print "No replacements made.\n";
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exit 0;
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}
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}
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my $unshift_last_code = 0;
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unless($got_undo and not $got_changes) {
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$unshift_last_code = 1 unless $copy_code and not $got_changes;
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}
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if ($copy_code and $got_changes) {
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$self->{only_show} = 0;
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}
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if ($got_undo and not $got_changes) {
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$self->{only_show} = 1;
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}
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unless (($self->{got_run} or $got_diff) and not $got_changes) {
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if ($unshift_last_code) {
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unshift @last_code, $code;
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}
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save_history("$RealBin/../history/$self->{channel}-$self->{lang}.hist", \@last_code, $self->{max_history});
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}
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if ($got_diff) {
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if ($#last_code < 1) {
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print "Not enough recent code to diff.\n"
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} else {
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use Text::WordDiff;
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my $diff = word_diff(\$last_code[1], \$last_code[0], { STYLE => 'Diff' });
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if ($diff !~ /(?:<del>|<ins>)/) {
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$diff = "No difference.";
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} else {
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$diff =~ s/<del>(.*?)(\s+)<\/del>/<del>$1<\/del>$2/g;
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$diff =~ s/<ins>(.*?)(\s+)<\/ins>/<ins>$1<\/ins>$2/g;
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$diff =~ s/<del>((?:(?!<del>).)*)<\/del>\s*<ins>((?:(?!<ins>).)*)<\/ins>/`replaced $1 with $2`/g;
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$diff =~ s/<del>(.*?)<\/del>/`removed $1`/g;
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$diff =~ s/<ins>(.*?)<\/ins>/`inserted $1`/g;
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}
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print "$diff\n";
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}
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exit 0;
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}
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$self->{code} = $code;
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}
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sub save_history($path, $lines, $max_lines) {
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open my $fh, '>:encoding(UTF-8)', $path;
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return if not $fh;
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my $i = 0;
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foreach my $line (@$lines) {
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last if (++$i > $max_lines);
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print $fh "$line\n";
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}
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close $fh;
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}
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sub load_history($path) {
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my @lines;
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my $fh;
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|
if (not open $fh, '<:encoding(UTF-8)', $path) {
|
|
return undef;
|
|
}
|
|
|
|
while (my $line = <$fh>) {
|
|
chomp $line;
|
|
push @lines, $line;
|
|
}
|
|
|
|
close $fh;
|
|
return @lines;
|
|
}
|
|
|
|
1;
|