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#!/usr/bin/perl
use strict;
use warnings;
use File::Path qw(make_path remove_tree);
use File::Copy qw(copy);
use File::Find;
use File::Basename;
use File::Glob qw(:bsd_glob);
use File::Spec;
use constant VCX_DIR => '.vcx';
use constant BSE_DIR => VCX_DIR . '/bse';
use constant OBJ_DIR => VCX_DIR . '/obj';
use constant TMP_DIR => VCX_DIR . '/tmp';
my $cmd = $ARGV[0] // '';
my $path = $ARGV[1] // '';
if ($cmd eq 'init') {
init_repo();
} elsif ($cmd eq 'status') {
run_status();
} elsif ($cmd eq 'add') {
die "Usage: $0 add [path]\n" unless $path;
run_add($path);
} else {
print "Usage: $0 [init|status]\n";
exit 1;
}
sub init_repo {
make_path(OBJ_DIR, BSE_DIR, TMP_DIR);
print "Repository ready\n";
}
sub run_status {
my $diff_cmd = "diff -x " . VCX_DIR . " -rq " . BSE_DIR . " .";
$diff_cmd .= " -X .vcxignore" if -e ".vcxignore";
my @output = `$diff_cmd`;
foreach my $line (@output) {
chomp $line;
# Format output
if ($line =~ /^Only in \Q@{[BSE_DIR]}\E: (.+)$/) {
print "[D] $1\n";
} elsif ($line =~ /^Only in \.: (.+)$/) {
print "[N] $1\n";
} elsif ($line =~ /^Files \Q@{[BSE_DIR]}\E\/(.+) and \.\/(.+) differ$/) {
print "[M] $1\n";
}
}
}
sub run_add {
my ($target) = @_;
# Copy BSE_DIR to TMP_DIR
remove_tree(TMP_DIR);
make_path(TMP_DIR);
if (glob(BSE_DIR . "/*")) {
system("cp -R '" . BSE_DIR . "/.' '" . TMP_DIR . "/'");
}
my @targets = ($target eq '.') ? ('.') : bsd_glob($target);
foreach my $t (@targets) {
find({
wanted => sub {
# Skip VCX directory
return if $File::Find::name =~ /^\.\/\Q${\VCX_DIR}\E/;
my $rel_path = File::Spec->abs2rel($File::Find::name, '.');
my $local_path = $File::Find::name;
my $base_path = BSE_DIR . "/$rel_path";
my $obj_path = OBJ_DIR . "/$rel_path";
my $tmp_link = TMP_DIR . "/$rel_path";
# Regular file
if (-f $local_path) {
if (!-e $base_path) {
_sync_new_file($local_path, $obj_path, $tmp_link);
} elsif (!-l $base_path && system("diff -q '$local_path' '$base_path' > /dev/null") != 0) {
_sync_modified_file($local_path, $obj_path, $tmp_link);
}
}
# Symlink
elsif (-l $local_path) {
if (-l $base_path) {
# Both are symlinks: compare the targets (where they point)
if (readlink($local_path) ne readlink($base_path)) {
_sync_modified_file($local_path, $obj_path, $tmp_link);
}
} else {
# Local is a symlink, but base isn't: treat as modification
_sync_modified_file($local_path, $obj_path, $tmp_link);
}
}
},
follow => 0,
no_chdir => 1,
}, $t) if -e $t;
_handle_deletions($t);
}
}
sub _sync_new_file {
my ($src, $obj, $tmp) = @_;
make_path(dirname($obj));
make_path(dirname($tmp));
copy($src, $obj);
# Symlink from tmp/path/to/file to obj/path/to/file
# Note: symlink target is relative to the symlink's location
symlink("../../obj/" . $src, $tmp);
print "[Add New] $src\n";
}
sub _sync_modified_file {
my ($src, $obj, $tmp) = @_;
my $tmp_obj = "$obj.tmp";
make_path(dirname($tmp_obj));
copy($src, $tmp_obj);
unlink($tmp) if -l $tmp;
symlink("../../obj/" . $src . ".tmp", $tmp);
print "[Add Mod] $src\n";
}
sub _handle_deletions {
my ($target) = @_;
my $search_base = ($target eq '.') ? BSE_DIR : BSE_DIR . "/$target";
return unless -d $search_base || -e $search_base;
find({
wanted => sub {
return if -d $_;
my $rel_path = File::Spec->abs2rel($File::Find::name, BSE_DIR);
# If file exists in BSE_DIR but NOT in current directory (.)
if (!-e $rel_path) {
unlink(OBJ_DIR . "/$rel_path");
unlink(BSE_DIR . "/$rel_path");
print "[Deleted] $rel_path\n";
}
},
no_chdir => 1,
}, $search_base);
}
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