diff --git a/src/htmlcmp/compare_output_server.py b/src/htmlcmp/compare_output_server.py
index 8ad8c80..e54c762 100755
--- a/src/htmlcmp/compare_output_server.py
+++ b/src/htmlcmp/compare_output_server.py
@@ -272,6 +272,30 @@ def root():
has_comparator = Config.comparator is not None
+ def collect_one_sided(existing: Path, root: Path, message: str) -> list[dict]:
+ """Walk a directory present on only one side.
+
+ Emits one row per comparable file inside it so each file stays viewable
+ (on the present side) and copyable to the reference, just like a missing
+ file. Recurses into nested directories.
+ """
+ entries = []
+
+ for child in sorted(existing.iterdir(), key=lambda p: p.name):
+ if child.is_dir():
+ entries.extend(collect_one_sided(child, root, message))
+ elif child.is_file() and comparable_file(child):
+ entries.append(
+ {
+ "path": str(child.relative_to(root)),
+ "comparable": True,
+ "message": message,
+ "result": "different",
+ }
+ )
+
+ return entries
+
def collect(a: Path, b: Path) -> list[dict]:
"""Single O(n) walk producing flat leaf rows.
@@ -311,7 +335,7 @@ def collect(a: Path, b: Path) -> list[dict]:
entries.append(
{
"path": str(rel),
- "comparable": False,
+ "comparable": True,
"message": "missing in reference (A)",
"result": "different",
}
@@ -320,23 +344,25 @@ def collect(a: Path, b: Path) -> list[dict]:
entries.append(
{
"path": str(rel),
- "comparable": False,
+ "comparable": True,
"message": "missing in monitored (B)",
"result": "different",
}
)
for name in sorted(left_dirs ^ right_dirs):
- rel = common_path / name
- where = "reference (A)" if name in right_dirs else "monitored (B)"
- entries.append(
- {
- "path": str(rel) + "/",
- "comparable": False,
- "message": f"directory missing in {where}",
- "result": "different",
- }
- )
+ if name in left_dirs:
+ entries.extend(
+ collect_one_sided(
+ a / name, Config.path_a, "missing in monitored (B)"
+ )
+ )
+ else:
+ entries.extend(
+ collect_one_sided(
+ b / name, Config.path_b, "missing in reference (A)"
+ )
+ )
for name in sorted(left_dirs & right_dirs):
entries.extend(collect(a / name, b / name))
@@ -638,6 +664,9 @@ def image_diff(path: str):
if Config.driver is None:
return "Image diff not available without browser driver", 404
+ if not (Config.path_a / path).is_file() or not (Config.path_b / path).is_file():
+ return "Image diff not available: file missing on one side", 404
+
diff, _ = html_render_diff(
Config.path_a / path,
Config.path_b / path,
@@ -659,6 +688,16 @@ def file(variant: str, path: str):
raise ValueError("Variant must be 'a' or 'b'")
variant_root = Config.path_a if variant == "a" else Config.path_b
+
+ if not (variant_root / path).is_file():
+ side = "reference (A)" if variant == "a" else "monitored (B)"
+ return (
+ ""
+ f"file missing in {side}
"
+ )
+
return send_from_directory(variant_root, path)