Resolve image paths correctly

src/wireviz/DataClasses.py

@@ -31,7 +31,6 @@
 
 @dataclass
 class Image:
-    gv_dir: InitVar[Path] # Directory of .gv file injected as context during parsing
     # Attributes of the image object <img>:
     src: str
     scale: Optional[ImageScale] = None
@@ -43,7 +42,7 @@ class Image:
     caption: Optional[MultilineHypertext] = None
     # See also HTML doc at https://graphviz.org/doc/info/shapes.html#html
 
-    def __post_init__(self, gv_dir):
+    def __post_init__(self):
 
         if self.fixedsize is None:
             # Default True if any dimension specified unless self.scale also is specified.
@@ -59,10 +58,10 @@ def __post_init__(self, gv_dir):
             # because Graphviz requires both when fixedsize=True.
             if self.height:
                 if not self.width:
-                    self.width = self.height * aspect_ratio(gv_dir.joinpath(self.src))
+                    self.width = self.height * aspect_ratio(self.src)
             else:
                 if self.width:
-                    self.height = self.width / aspect_ratio(gv_dir.joinpath(self.src))
+                    self.height = self.width / aspect_ratio(self.src)
 
 
 @dataclass

src/wireviz/wireviz.py

@@ -17,7 +17,7 @@
 from wireviz.wv_helper import expand, open_file_read
 
 
-def parse(yaml_input: str, file_out: (str, Path) = None, return_types: (None, str, Tuple[str]) = None) -> Any:
+def parse(yaml_input: str, file_in: (str, Path) = None, file_out: (str, Path) = None, return_types: (None, str, Tuple[str]) = None) -> Any:
     """
     Parses yaml input string and does the high-level harness conversion
 
@@ -44,10 +44,11 @@ def parse(yaml_input: str, file_out: (str, Path) = None, return_types: (None, st
             if len(yaml_data[sec]) > 0:
                 if ty == dict:
                     for key, attribs in yaml_data[sec].items():
-                        # The Image dataclass might need to open an image file with a relative path.
-                        image = attribs.get('image')
-                        if isinstance(image, dict):
-                            image['gv_dir'] = Path(file_out if file_out else '').parent # Inject context
+                        if attribs.get('image'):
+                            image_path = attribs['image']['src']
+                            if not Path(image_path).is_absolute():  # resolve relative image path
+                                image_path = (Path(file_in).parent / image_path).resolve()
+                                attribs['image']['src'] = image_path
 
                         if sec == 'connectors':
                             if not attribs.get('autogenerate', False):
@@ -209,7 +210,7 @@ def parse_file(yaml_file: str, file_out: (str, Path) = None) -> None:
         file_out = fn
     file_out = os.path.abspath(file_out)
 
-    parse(yaml_input, file_out=file_out)
+    parse(yaml_input, file_in=Path(yaml_file).resolve(), file_out=file_out)
 
 
 def parse_cmdline():
@@ -251,7 +252,7 @@ def main():
         file_out = args.output_file
     file_out = os.path.abspath(file_out)
 
-    parse(yaml_input, file_out=file_out)
+    parse(yaml_input, file_in=Path(args.input_file).resolve(), file_out=file_out)
 
 
 if __name__ == '__main__':