From cf421aeff4faa15a2a80495345ae76023830ca86 Mon Sep 17 00:00:00 2001
From: Sadeep Madurange <sadeep@asciimx.com>
Date: Sat, 4 Apr 2026 11:55:08 +0800
Subject: Unit tests and fix hash collisions, deletions.

---
 vcx | 42 ++++++++++++++++++++++++++++++++----------
 1 file changed, 32 insertions(+), 10 deletions(-)

(limited to 'vcx')

diff --git a/vcx b/vcx
index 11ba10d..e872961 100644
--- a/vcx
+++ b/vcx
@@ -2,7 +2,6 @@
 
 use strict;
 use warnings;
-
 use File::Path qw(make_path);
 use File::Copy qw(copy);
 use File::Find;
@@ -15,9 +14,9 @@ use Digest::SHA qw(sha1_hex);
 use POSIX qw(strftime);
 
 use constant VCX_DIR	=> '.vcx';
-use constant HEAD       => VCX_DIR . '/head';	# Current commit ID
-use constant OBJ_DIR	=> VCX_DIR . '/objs';	# Latest version of a file
-use constant REV_DIR	=> VCX_DIR . '/revs';	# Commits
+use constant HEAD       => VCX_DIR . '/head';  # Current commit ID
+use constant OBJ_DIR	=> VCX_DIR . '/obj';   # Latest version of a file
+use constant REV_DIR	=> VCX_DIR . '/rev';   # Commits
 
 # Staging area
 use constant TMP_DIR	=> VCX_DIR . '/index';
@@ -160,10 +159,10 @@ sub run_add {
 
 	my $next_id_hex = to_hex_id(from_hex_id($head) + 1);
 
-	my @entries;
+	my %entries;
 	open my $afh, '>>', TMP_META_FILE or die $!;
 
-	init_stage($latest_tree_dir, \@entries);
+	init_stage($latest_tree_dir, \%entries);
 
 	foreach my $input (@targets) {
 		my @expanded = bsd_glob($input);
@@ -178,7 +177,7 @@ sub run_add {
 					return if -d $_;
 
 					my $rel = $File::Find::name =~ s|^\./||r;
-					push @entries, $rel;
+					$entries{$rel} = 1;
 
 					my $staged_path = File::Spec->catfile(TMP_TREE, $rel);
 					my $prev_link = File::Spec->catfile($latest_tree_dir, $rel);
@@ -197,7 +196,7 @@ sub run_add {
 						my $obj_path = File::Spec->catfile(OBJ_DIR, $obj_name);
 
 						if (-e $obj_path) {
-							my $p_path = File::Spec->catfile(TMP_DIFF, "$obj_name.$next_id_hex.patch");
+							my $p_path = File::Spec->catfile(TMP_DIFF, "$obj_name.patch");
 							if (-T $_) {
 								if (compare($_, $obj_path) != 0) {
 									unless (-d TMP_DIFF) { make_path(TMP_DIFF); }
@@ -231,9 +230,32 @@ sub run_add {
 			}, $t);
 		}
 	}
+
+	# Pass 2: History -> Workspace (Detects Deletions)	
+	foreach my $path (keys %entries) {
+		if (!-e $path && !-l $path) {
+			delete $entries{$path};
+			my $staged_path = File::Spec->catfile(TMP_TREE, $path);
+			if (-e $staged_path || -l $staged_path) {
+				unlink($staged_path) or die "Could not unlink staged $path: $!";
+				my $parent = dirname($staged_path);
+				while ($parent ne TMP_TREE && -d $parent) {
+					last if bsd_glob("$parent/*"); # Stop if not empty
+					rmdir($parent);
+					$parent = dirname($parent);
+				}
+			}
+			print "[D] $path (staged for deletion)\n";
+		}
+	}
+
 	close $afh;
 
-	my $tree_data = join("\n", sort @entries);
+	my @sorted_paths = sort keys %entries;
+	my $tree_ents    = join("\n", @sorted_paths);	
+	my $tree_header  = "tree " . scalar(@sorted_paths) . "\n";
+	my $tree_data    = $tree_header . $tree_ents;
+
 	my $tree_hash = sha1_hex($tree_data);
 	my $tree_file = File::Spec->catfile(TMP_DIR, "tree-$tree_hash");
 	open my $fh, '>', $tree_file or die $!; close $fh;
@@ -514,7 +536,7 @@ sub init_stage {
 			my $target = readlink($_);
 			symlink($target, $staged_path) or die "Failed to link $rel: $!";
 			
-			push @$entries_ref, $rel;
+			$entries_ref->{$rel} = 1;
 		},
 		no_chdir => 1
 	}, $latest_tree_dir);
-- 
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