license creation failing because of wrong path (#58)

* changed doc string of generate_copyright_file

---------

Signed-off-by: Anton Utz <uta5fe@bosch.com>
Co-authored-by: Christian Henkel <christian.henkel2@de.bosch.com>

pyproject.toml

@@ -28,7 +28,7 @@ dependencies = [
     "gitpython",
     "rospkg",
     "scancode-toolkit>=32.0.8",
-    "spdx-tools"
+    "spdx-tools<=0.7.1"
 ]
 requires-python = ">=3.7"
 

src/ros_license_toolkit/main.py

@@ -98,15 +98,13 @@ def main(args: Optional[Sequence[str]] = None) -> int:
         results_per_package.update(
             process_one_pkg(rll_print, package))
 
-    # Generate copyright file
-    if parsed_args.generate_copyright_file:
-        if len(packages) == 1:
-            package = packages[0]
-            package.write_copyright_file(
-                os.path.join(os.getcwd(), 'copyright'))
+    if max(results_per_package.values()) != Status.FAILURE:
+        if parsed_args.generate_copyright_file:
+            generate_copyright_file(packages, rll_print)
         else:
             rll_print(red(
-                "Can only generate copyright file for single package"),
+                "Copyright file will not be generated "
+                + "because there were linter errors."),
                 Verbosity.QUIET)
 
     stop = timeit.default_timer()
@@ -123,6 +121,22 @@ def main(args: Optional[Sequence[str]] = None) -> int:
     return os.EX_DATAERR
 
 
+def generate_copyright_file(packages, rll_print):
+    """Generate copyright file. In case more than one package
+    is provided, display error message."""
+    if len(packages) == 1:
+        package = packages[0]
+        try:
+            package.write_copyright_file(
+                os.path.join(os.getcwd(), 'copyright'))
+        except AssertionError as error:
+            rll_print(red(str(error)))
+    else:
+        rll_print(red(
+            "Can only generate copyright file for single package"),
+            Verbosity.QUIET)
+
+
 def process_one_pkg(rll_print, package):
     """Perform checks on one package, print results and return them."""
     results_per_package = {}

src/ros_license_toolkit/package.py

@@ -263,11 +263,13 @@ def get_copyright_file_contents(self) -> str:
             cpr_str += f"\nLicense: {pkg_license.id}\n"
             assert pkg_license.license_text_file, \
                 "License text file must be defined."
-            with open(os.path.join(
-                self.abspath,
-                pkg_license.license_text_file),
-                encoding="utf-8"
-            ) as f:
+            license_path = os.path.join(self.abspath,
+                                        pkg_license.license_text_file)
+            if not os.path.exists(license_path):
+                raise FileExistsError(
+                    ('Cannot create copyright file.'
+                     f'File {license_path} does not exist.'))
+            with open(license_path, encoding="utf-8") as f:
                 license_lines = f.readlines()
             for line in license_lines:
                 cpr_str += f" {line}"