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git-add--interactive.perl
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#!/usr/bin/perl
use 5.008;
use strict;
use warnings;
use Git qw(unquote_path);
use Git::I18N;
binmode(STDOUT, ":raw");
my $repo = Git->repository();
my $menu_use_color = $repo->get_colorbool('color.interactive');
my ($prompt_color, $header_color, $help_color) =
$menu_use_color ? (
$repo->get_color('color.interactive.prompt', 'bold blue'),
$repo->get_color('color.interactive.header', 'bold'),
$repo->get_color('color.interactive.help', 'red bold'),
) : ();
my $error_color = ();
if ($menu_use_color) {
my $help_color_spec = ($repo->config('color.interactive.help') or
'red bold');
$error_color = $repo->get_color('color.interactive.error',
$help_color_spec);
}
my $diff_use_color = $repo->get_colorbool('color.diff');
my ($fraginfo_color) =
$diff_use_color ? (
$repo->get_color('color.diff.frag', 'cyan'),
) : ();
my ($diff_plain_color) =
$diff_use_color ? (
$repo->get_color('color.diff.plain', ''),
) : ();
my ($diff_old_color) =
$diff_use_color ? (
$repo->get_color('color.diff.old', 'red'),
) : ();
my ($diff_new_color) =
$diff_use_color ? (
$repo->get_color('color.diff.new', 'green'),
) : ();
my $normal_color = $repo->get_color("", "reset");
my $diff_algorithm = $repo->config('diff.algorithm');
my $diff_filter = $repo->config('interactive.difffilter');
my $use_readkey = 0;
my $use_termcap = 0;
my %term_escapes;
sub ReadMode;
sub ReadKey;
if ($repo->config_bool("interactive.singlekey")) {
eval {
require Term::ReadKey;
Term::ReadKey->import;
$use_readkey = 1;
};
if (!$use_readkey) {
print STDERR "missing Term::ReadKey, disabling interactive.singlekey\n";
}
eval {
require Term::Cap;
my $termcap = Term::Cap->Tgetent;
foreach (values %$termcap) {
$term_escapes{$_} = 1 if /^\e/;
}
$use_termcap = 1;
};
}
sub colored {
my $color = shift;
my $string = join("", @_);
if (defined $color) {
# Put a color code at the beginning of each line, a reset at the end
# color after newlines that are not at the end of the string
$string =~ s/(\n+)(.)/$1$color$2/g;
# reset before newlines
$string =~ s/(\n+)/$normal_color$1/g;
# codes at beginning and end (if necessary):
$string =~ s/^/$color/;
$string =~ s/$/$normal_color/ unless $string =~ /\n$/;
}
return $string;
}
# command line options
my $patch_mode_only;
my $patch_mode;
my $patch_mode_revision;
sub apply_patch;
sub apply_patch_for_checkout_commit;
sub apply_patch_for_stash;
my %patch_modes = (
'stage' => {
DIFF => 'diff-files -p',
APPLY => sub { apply_patch 'apply --cached', @_; },
APPLY_CHECK => 'apply --cached',
FILTER => 'file-only',
IS_REVERSE => 0,
},
'stash' => {
DIFF => 'diff-index -p HEAD',
APPLY => sub { apply_patch 'apply --cached', @_; },
APPLY_CHECK => 'apply --cached',
FILTER => undef,
IS_REVERSE => 0,
},
'reset_head' => {
DIFF => 'diff-index -p --cached',
APPLY => sub { apply_patch 'apply -R --cached', @_; },
APPLY_CHECK => 'apply -R --cached',
FILTER => 'index-only',
IS_REVERSE => 1,
},
'reset_nothead' => {
DIFF => 'diff-index -R -p --cached',
APPLY => sub { apply_patch 'apply --cached', @_; },
APPLY_CHECK => 'apply --cached',
FILTER => 'index-only',
IS_REVERSE => 0,
},
'checkout_index' => {
DIFF => 'diff-files -p',
APPLY => sub { apply_patch 'apply -R', @_; },
APPLY_CHECK => 'apply -R',
FILTER => 'file-only',
IS_REVERSE => 1,
},
'checkout_head' => {
DIFF => 'diff-index -p',
APPLY => sub { apply_patch_for_checkout_commit '-R', @_ },
APPLY_CHECK => 'apply -R',
FILTER => undef,
IS_REVERSE => 1,
},
'checkout_nothead' => {
DIFF => 'diff-index -R -p',
APPLY => sub { apply_patch_for_checkout_commit '', @_ },
APPLY_CHECK => 'apply',
FILTER => undef,
IS_REVERSE => 0,
},
'worktree_head' => {
DIFF => 'diff-index -p',
APPLY => sub { apply_patch 'apply -R', @_ },
APPLY_CHECK => 'apply -R',
FILTER => undef,
IS_REVERSE => 1,
},
'worktree_nothead' => {
DIFF => 'diff-index -R -p',
APPLY => sub { apply_patch 'apply', @_ },
APPLY_CHECK => 'apply',
FILTER => undef,
IS_REVERSE => 0,
},
);
$patch_mode = 'stage';
my %patch_mode_flavour = %{$patch_modes{$patch_mode}};
sub run_cmd_pipe {
if ($^O eq 'MSWin32') {
my @invalid = grep {m/[":*]/} @_;
die "$^O does not support: @invalid\n" if @invalid;
my @args = map { m/ /o ? "\"$_\"": $_ } @_;
return qx{@args};
} else {
my $fh = undef;
open($fh, '-|', @_) or die;
my @out = <$fh>;
close $fh || die "Cannot close @_ ($!)";
return @out;
}
}
my ($GIT_DIR) = run_cmd_pipe(qw(git rev-parse --git-dir));
if (!defined $GIT_DIR) {
exit(1); # rev-parse would have already said "not a git repo"
}
chomp($GIT_DIR);
sub refresh {
my $fh;
open $fh, 'git update-index --refresh |'
or die;
while (<$fh>) {
;# ignore 'needs update'
}
close $fh;
}
sub list_untracked {
map {
chomp $_;
unquote_path($_);
}
run_cmd_pipe(qw(git ls-files --others --exclude-standard --), @ARGV);
}
# TRANSLATORS: you can adjust this to align "git add -i" status menu
my $status_fmt = __('%12s %12s %s');
my $status_head = sprintf($status_fmt, __('staged'), __('unstaged'), __('path'));
{
my $initial;
sub is_initial_commit {
$initial = system('git rev-parse HEAD -- >/dev/null 2>&1') != 0
unless defined $initial;
return $initial;
}
}
{
my $empty_tree;
sub get_empty_tree {
return $empty_tree if defined $empty_tree;
($empty_tree) = run_cmd_pipe(qw(git hash-object -t tree /dev/null));
chomp $empty_tree;
return $empty_tree;
}
}
sub get_diff_reference {
my $ref = shift;
if (defined $ref and $ref ne 'HEAD') {
return $ref;
} elsif (is_initial_commit()) {
return get_empty_tree();
} else {
return 'HEAD';
}
}
# Returns list of hashes, contents of each of which are:
# VALUE: pathname
# BINARY: is a binary path
# INDEX: is index different from HEAD?
# FILE: is file different from index?
# INDEX_ADDDEL: is it add/delete between HEAD and index?
# FILE_ADDDEL: is it add/delete between index and file?
# UNMERGED: is the path unmerged
sub list_modified {
my ($only) = @_;
my (%data, @return);
my ($add, $del, $adddel, $file);
my $reference = get_diff_reference($patch_mode_revision);
for (run_cmd_pipe(qw(git diff-index --cached
--numstat --summary), $reference,
'--', @ARGV)) {
if (($add, $del, $file) =
/^([-\d]+) ([-\d]+) (.*)/) {
my ($change, $bin);
$file = unquote_path($file);
if ($add eq '-' && $del eq '-') {
$change = __('binary');
$bin = 1;
}
else {
$change = "+$add/-$del";
}
$data{$file} = {
INDEX => $change,
BINARY => $bin,
FILE => __('nothing'),
}
}
elsif (($adddel, $file) =
/^ (create|delete) mode [0-7]+ (.*)$/) {
$file = unquote_path($file);
$data{$file}{INDEX_ADDDEL} = $adddel;
}
}
for (run_cmd_pipe(qw(git diff-files --ignore-submodules=dirty --numstat --summary --raw --), @ARGV)) {
if (($add, $del, $file) =
/^([-\d]+) ([-\d]+) (.*)/) {
$file = unquote_path($file);
my ($change, $bin);
if ($add eq '-' && $del eq '-') {
$change = __('binary');
$bin = 1;
}
else {
$change = "+$add/-$del";
}
$data{$file}{FILE} = $change;
if ($bin) {
$data{$file}{BINARY} = 1;
}
}
elsif (($adddel, $file) =
/^ (create|delete) mode [0-7]+ (.*)$/) {
$file = unquote_path($file);
$data{$file}{FILE_ADDDEL} = $adddel;
}
elsif (/^:[0-7]+ [0-7]+ [0-9a-f]+ [0-9a-f]+ (.) (.*)$/) {
$file = unquote_path($2);
if (!exists $data{$file}) {
$data{$file} = +{
INDEX => __('unchanged'),
BINARY => 0,
};
}
if ($1 eq 'U') {
$data{$file}{UNMERGED} = 1;
}
}
}
for (sort keys %data) {
my $it = $data{$_};
if ($only) {
if ($only eq 'index-only') {
next if ($it->{INDEX} eq __('unchanged'));
}
if ($only eq 'file-only') {
next if ($it->{FILE} eq __('nothing'));
}
}
push @return, +{
VALUE => $_,
%$it,
};
}
return @return;
}
sub find_unique {
my ($string, @stuff) = @_;
my $found = undef;
for (my $i = 0; $i < @stuff; $i++) {
my $it = $stuff[$i];
my $hit = undef;
if (ref $it) {
if ((ref $it) eq 'ARRAY') {
$it = $it->[0];
}
else {
$it = $it->{VALUE};
}
}
eval {
if ($it =~ /^$string/) {
$hit = 1;
};
};
if (defined $hit && defined $found) {
return undef;
}
if ($hit) {
$found = $i + 1;
}
}
return $found;
}
# inserts string into trie and updates count for each character
sub update_trie {
my ($trie, $string) = @_;
foreach (split //, $string) {
$trie = $trie->{$_} ||= {COUNT => 0};
$trie->{COUNT}++;
}
}
# returns an array of tuples (prefix, remainder)
sub find_unique_prefixes {
my @stuff = @_;
my @return = ();
# any single prefix exceeding the soft limit is omitted
# if any prefix exceeds the hard limit all are omitted
# 0 indicates no limit
my $soft_limit = 0;
my $hard_limit = 3;
# build a trie modelling all possible options
my %trie;
foreach my $print (@stuff) {
if ((ref $print) eq 'ARRAY') {
$print = $print->[0];
}
elsif ((ref $print) eq 'HASH') {
$print = $print->{VALUE};
}
update_trie(\%trie, $print);
push @return, $print;
}
# use the trie to find the unique prefixes
for (my $i = 0; $i < @return; $i++) {
my $ret = $return[$i];
my @letters = split //, $ret;
my %search = %trie;
my ($prefix, $remainder);
my $j;
for ($j = 0; $j < @letters; $j++) {
my $letter = $letters[$j];
if ($search{$letter}{COUNT} == 1) {
$prefix = substr $ret, 0, $j + 1;
$remainder = substr $ret, $j + 1;
last;
}
else {
my $prefix = substr $ret, 0, $j;
return ()
if ($hard_limit && $j + 1 > $hard_limit);
}
%search = %{$search{$letter}};
}
if (ord($letters[0]) > 127 ||
($soft_limit && $j + 1 > $soft_limit)) {
$prefix = undef;
$remainder = $ret;
}
$return[$i] = [$prefix, $remainder];
}
return @return;
}
# filters out prefixes which have special meaning to list_and_choose()
sub is_valid_prefix {
my $prefix = shift;
return (defined $prefix) &&
!($prefix =~ /[\s,]/) && # separators
!($prefix =~ /^-/) && # deselection
!($prefix =~ /^\d+/) && # selection
($prefix ne '*') && # "all" wildcard
($prefix ne '?'); # prompt help
}
# given a prefix/remainder tuple return a string with the prefix highlighted
# for now use square brackets; later might use ANSI colors (underline, bold)
sub highlight_prefix {
my $prefix = shift;
my $remainder = shift;
if (!defined $prefix) {
return $remainder;
}
if (!is_valid_prefix($prefix)) {
return "$prefix$remainder";
}
if (!$menu_use_color) {
return "[$prefix]$remainder";
}
return "$prompt_color$prefix$normal_color$remainder";
}
sub error_msg {
print STDERR colored $error_color, @_;
}
sub list_and_choose {
my ($opts, @stuff) = @_;
my (@chosen, @return);
if (!@stuff) {
return @return;
}
my $i;
my @prefixes = find_unique_prefixes(@stuff) unless $opts->{LIST_ONLY};
TOPLOOP:
while (1) {
my $last_lf = 0;
if ($opts->{HEADER}) {
if (!$opts->{LIST_FLAT}) {
print " ";
}
print colored $header_color, "$opts->{HEADER}\n";
}
for ($i = 0; $i < @stuff; $i++) {
my $chosen = $chosen[$i] ? '*' : ' ';
my $print = $stuff[$i];
my $ref = ref $print;
my $highlighted = highlight_prefix(@{$prefixes[$i]})
if @prefixes;
if ($ref eq 'ARRAY') {
$print = $highlighted || $print->[0];
}
elsif ($ref eq 'HASH') {
my $value = $highlighted || $print->{VALUE};
$print = sprintf($status_fmt,
$print->{INDEX},
$print->{FILE},
$value);
}
else {
$print = $highlighted || $print;
}
printf("%s%2d: %s", $chosen, $i+1, $print);
if (($opts->{LIST_FLAT}) &&
(($i + 1) % ($opts->{LIST_FLAT}))) {
print "\t";
$last_lf = 0;
}
else {
print "\n";
$last_lf = 1;
}
}
if (!$last_lf) {
print "\n";
}
return if ($opts->{LIST_ONLY});
print colored $prompt_color, $opts->{PROMPT};
if ($opts->{SINGLETON}) {
print "> ";
}
else {
print ">> ";
}
my $line = <STDIN>;
if (!$line) {
print "\n";
$opts->{ON_EOF}->() if $opts->{ON_EOF};
last;
}
chomp $line;
last if $line eq '';
if ($line eq '?') {
$opts->{SINGLETON} ?
singleton_prompt_help_cmd() :
prompt_help_cmd();
next TOPLOOP;
}
for my $choice (split(/[\s,]+/, $line)) {
my $choose = 1;
my ($bottom, $top);
# Input that begins with '-'; unchoose
if ($choice =~ s/^-//) {
$choose = 0;
}
# A range can be specified like 5-7 or 5-.
if ($choice =~ /^(\d+)-(\d*)$/) {
($bottom, $top) = ($1, length($2) ? $2 : 1 + @stuff);
}
elsif ($choice =~ /^\d+$/) {
$bottom = $top = $choice;
}
elsif ($choice eq '*') {
$bottom = 1;
$top = 1 + @stuff;
}
else {
$bottom = $top = find_unique($choice, @stuff);
if (!defined $bottom) {
error_msg sprintf(__("Huh (%s)?\n"), $choice);
next TOPLOOP;
}
}
if ($opts->{SINGLETON} && $bottom != $top) {
error_msg sprintf(__("Huh (%s)?\n"), $choice);
next TOPLOOP;
}
for ($i = $bottom-1; $i <= $top-1; $i++) {
next if (@stuff <= $i || $i < 0);
$chosen[$i] = $choose;
}
}
last if ($opts->{IMMEDIATE} || $line eq '*');
}
for ($i = 0; $i < @stuff; $i++) {
if ($chosen[$i]) {
push @return, $stuff[$i];
}
}
return @return;
}
sub singleton_prompt_help_cmd {
print colored $help_color, __ <<'EOF' ;
Prompt help:
1 - select a numbered item
foo - select item based on unique prefix
- (empty) select nothing
EOF
}
sub prompt_help_cmd {
print colored $help_color, __ <<'EOF' ;
Prompt help:
1 - select a single item
3-5 - select a range of items
2-3,6-9 - select multiple ranges
foo - select item based on unique prefix
-... - unselect specified items
* - choose all items
- (empty) finish selecting
EOF
}
sub status_cmd {
list_and_choose({ LIST_ONLY => 1, HEADER => $status_head },
list_modified());
print "\n";
}
sub say_n_paths {
my $did = shift @_;
my $cnt = scalar @_;
if ($did eq 'added') {
printf(__n("added %d path\n", "added %d paths\n",
$cnt), $cnt);
} elsif ($did eq 'updated') {
printf(__n("updated %d path\n", "updated %d paths\n",
$cnt), $cnt);
} elsif ($did eq 'reverted') {
printf(__n("reverted %d path\n", "reverted %d paths\n",
$cnt), $cnt);
} else {
printf(__n("touched %d path\n", "touched %d paths\n",
$cnt), $cnt);
}
}
sub update_cmd {
my @mods = list_modified('file-only');
return if (!@mods);
my @update = list_and_choose({ PROMPT => __('Update'),
HEADER => $status_head, },
@mods);
if (@update) {
system(qw(git update-index --add --remove --),
map { $_->{VALUE} } @update);
say_n_paths('updated', @update);
}
print "\n";
}
sub revert_cmd {
my @update = list_and_choose({ PROMPT => __('Revert'),
HEADER => $status_head, },
list_modified());
if (@update) {
if (is_initial_commit()) {
system(qw(git rm --cached),
map { $_->{VALUE} } @update);
}
else {
my @lines = run_cmd_pipe(qw(git ls-tree HEAD --),
map { $_->{VALUE} } @update);
my $fh;
open $fh, '| git update-index --index-info'
or die;
for (@lines) {
print $fh $_;
}
close($fh);
for (@update) {
if ($_->{INDEX_ADDDEL} &&
$_->{INDEX_ADDDEL} eq 'create') {
system(qw(git update-index --force-remove --),
$_->{VALUE});
printf(__("note: %s is untracked now.\n"), $_->{VALUE});
}
}
}
refresh();
say_n_paths('reverted', @update);
}
print "\n";
}
sub add_untracked_cmd {
my @add = list_and_choose({ PROMPT => __('Add untracked') },
list_untracked());
if (@add) {
system(qw(git update-index --add --), @add);
say_n_paths('added', @add);
} else {
print __("No untracked files.\n");
}
print "\n";
}
sub run_git_apply {
my $cmd = shift;
my $fh;
open $fh, '| git ' . $cmd . " --allow-overlap";
print $fh @_;
return close $fh;
}
sub parse_diff {
my ($path) = @_;
my @diff_cmd = split(" ", $patch_mode_flavour{DIFF});
if (defined $diff_algorithm) {
splice @diff_cmd, 1, 0, "--diff-algorithm=${diff_algorithm}";
}
if (defined $patch_mode_revision) {
push @diff_cmd, get_diff_reference($patch_mode_revision);
}
my @diff = run_cmd_pipe("git", @diff_cmd, "--", $path);
my @colored = ();
if ($diff_use_color) {
my @display_cmd = ("git", @diff_cmd, qw(--color --), $path);
if (defined $diff_filter) {
# quotemeta is overkill, but sufficient for shell-quoting
my $diff = join(' ', map { quotemeta } @display_cmd);
@display_cmd = ("$diff | $diff_filter");
}
@colored = run_cmd_pipe(@display_cmd);
}
my (@hunk) = { TEXT => [], DISPLAY => [], TYPE => 'header' };
if (@colored && @colored != @diff) {
print STDERR
"fatal: mismatched output from interactive.diffFilter\n",
"hint: Your filter must maintain a one-to-one correspondence\n",
"hint: between its input and output lines.\n";
exit 1;
}
for (my $i = 0; $i < @diff; $i++) {
if ($diff[$i] =~ /^@@ /) {
push @hunk, { TEXT => [], DISPLAY => [],
TYPE => 'hunk' };
}
push @{$hunk[-1]{TEXT}}, $diff[$i];
push @{$hunk[-1]{DISPLAY}},
(@colored ? $colored[$i] : $diff[$i]);
}
return @hunk;
}
sub parse_diff_header {
my $src = shift;
my $head = { TEXT => [], DISPLAY => [], TYPE => 'header' };
my $mode = { TEXT => [], DISPLAY => [], TYPE => 'mode' };
my $deletion = { TEXT => [], DISPLAY => [], TYPE => 'deletion' };
for (my $i = 0; $i < @{$src->{TEXT}}; $i++) {
my $dest =
$src->{TEXT}->[$i] =~ /^(old|new) mode (\d+)$/ ? $mode :
$src->{TEXT}->[$i] =~ /^deleted file/ ? $deletion :
$head;
push @{$dest->{TEXT}}, $src->{TEXT}->[$i];
push @{$dest->{DISPLAY}}, $src->{DISPLAY}->[$i];
}
return ($head, $mode, $deletion);
}
sub hunk_splittable {
my ($text) = @_;
my @s = split_hunk($text);
return (1 < @s);
}
sub parse_hunk_header {
my ($line) = @_;
my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) =
$line =~ /^@@ -(\d+)(?:,(\d+))? \+(\d+)(?:,(\d+))? @@/;
$o_cnt = 1 unless defined $o_cnt;
$n_cnt = 1 unless defined $n_cnt;
return ($o_ofs, $o_cnt, $n_ofs, $n_cnt);
}
sub format_hunk_header {
my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) = @_;
return ("@@ -$o_ofs" .
(($o_cnt != 1) ? ",$o_cnt" : '') .
" +$n_ofs" .
(($n_cnt != 1) ? ",$n_cnt" : '') .
" @@\n");
}
sub split_hunk {
my ($text, $display) = @_;
my @split = ();
if (!defined $display) {
$display = $text;
}
# If there are context lines in the middle of a hunk,
# it can be split, but we would need to take care of
# overlaps later.
my ($o_ofs, undef, $n_ofs) = parse_hunk_header($text->[0]);
my $hunk_start = 1;
OUTER:
while (1) {
my $next_hunk_start = undef;
my $i = $hunk_start - 1;
my $this = +{
TEXT => [],
DISPLAY => [],
TYPE => 'hunk',
OLD => $o_ofs,
NEW => $n_ofs,
OCNT => 0,
NCNT => 0,
ADDDEL => 0,
POSTCTX => 0,
USE => undef,
};
while (++$i < @$text) {
my $line = $text->[$i];
my $display = $display->[$i];
if ($line =~ /^\\/) {
push @{$this->{TEXT}}, $line;
push @{$this->{DISPLAY}}, $display;
next;
}
if ($line =~ /^ /) {
if ($this->{ADDDEL} &&
!defined $next_hunk_start) {
# We have seen leading context and
# adds/dels and then here is another
# context, which is trailing for this
# split hunk and leading for the next
# one.
$next_hunk_start = $i;
}
push @{$this->{TEXT}}, $line;
push @{$this->{DISPLAY}}, $display;
$this->{OCNT}++;
$this->{NCNT}++;
if (defined $next_hunk_start) {
$this->{POSTCTX}++;
}
next;
}
# add/del
if (defined $next_hunk_start) {
# We are done with the current hunk and
# this is the first real change for the
# next split one.
$hunk_start = $next_hunk_start;
$o_ofs = $this->{OLD} + $this->{OCNT};
$n_ofs = $this->{NEW} + $this->{NCNT};
$o_ofs -= $this->{POSTCTX};
$n_ofs -= $this->{POSTCTX};
push @split, $this;
redo OUTER;
}
push @{$this->{TEXT}}, $line;
push @{$this->{DISPLAY}}, $display;
$this->{ADDDEL}++;
if ($line =~ /^-/) {
$this->{OCNT}++;
}
else {
$this->{NCNT}++;
}
}
push @split, $this;
last;
}
for my $hunk (@split) {
$o_ofs = $hunk->{OLD};
$n_ofs = $hunk->{NEW};
my $o_cnt = $hunk->{OCNT};
my $n_cnt = $hunk->{NCNT};
my $head = format_hunk_header($o_ofs, $o_cnt, $n_ofs, $n_cnt);
my $display_head = $head;
unshift @{$hunk->{TEXT}}, $head;
if ($diff_use_color) {
$display_head = colored($fraginfo_color, $head);
}
unshift @{$hunk->{DISPLAY}}, $display_head;
}
return @split;
}
sub find_last_o_ctx {
my ($it) = @_;
my $text = $it->{TEXT};
my ($o_ofs, $o_cnt) = parse_hunk_header($text->[0]);
my $i = @{$text};
my $last_o_ctx = $o_ofs + $o_cnt;
while (0 < --$i) {
my $line = $text->[$i];
if ($line =~ /^ /) {
$last_o_ctx--;
next;
}
last;
}
return $last_o_ctx;
}
sub merge_hunk {
my ($prev, $this) = @_;
my ($o0_ofs, $o0_cnt, $n0_ofs, $n0_cnt) =
parse_hunk_header($prev->{TEXT}[0]);
my ($o1_ofs, $o1_cnt, $n1_ofs, $n1_cnt) =
parse_hunk_header($this->{TEXT}[0]);
my (@line, $i, $ofs, $o_cnt, $n_cnt);
$ofs = $o0_ofs;
$o_cnt = $n_cnt = 0;
for ($i = 1; $i < @{$prev->{TEXT}}; $i++) {
my $line = $prev->{TEXT}[$i];
if ($line =~ /^\+/) {
$n_cnt++;
push @line, $line;
next;
} elsif ($line =~ /^\\/) {
push @line, $line;
next;
}
last if ($o1_ofs <= $ofs);
$o_cnt++;
$ofs++;
if ($line =~ /^ /) {
$n_cnt++;
}
push @line, $line;
}
for ($i = 1; $i < @{$this->{TEXT}}; $i++) {
my $line = $this->{TEXT}[$i];
if ($line =~ /^\+/) {
$n_cnt++;
push @line, $line;
next;
} elsif ($line =~ /^\\/) {
push @line, $line;
next;
}
$ofs++;
$o_cnt++;
if ($line =~ /^ /) {
$n_cnt++;
}
push @line, $line;
}
my $head = format_hunk_header($o0_ofs, $o_cnt, $n0_ofs, $n_cnt);
@{$prev->{TEXT}} = ($head, @line);
}
sub coalesce_overlapping_hunks {
my (@in) = @_;
my @out = ();
my ($last_o_ctx, $last_was_dirty);
my $ofs_delta = 0;
for (@in) {
if ($_->{TYPE} ne 'hunk') {
push @out, $_;
next;
}
my $text = $_->{TEXT};
my ($o_ofs, $o_cnt, $n_ofs, $n_cnt) =
parse_hunk_header($text->[0]);
unless ($_->{USE}) {
$ofs_delta += $o_cnt - $n_cnt;
# If this hunk has been edited then subtract
# the delta that is due to the edit.
if ($_->{OFS_DELTA}) {
$ofs_delta -= $_->{OFS_DELTA};
}
next;
}
if ($ofs_delta) {
if ($patch_mode_flavour{IS_REVERSE}) {
$o_ofs -= $ofs_delta;
} else {
$n_ofs += $ofs_delta;
}
$_->{TEXT}->[0] = format_hunk_header($o_ofs, $o_cnt,
$n_ofs, $n_cnt);
}
# If this hunk was edited then adjust the offset delta
# to reflect the edit.