better errors

src/release_by_changelog/cmds/_release.py

@@ -80,6 +80,10 @@ def _project(
         if e.response_code == http.HTTPStatus.UNAUTHORIZED:
             raise release_by_changelog.exc.UnauthorizedError from e
         raise e
+    except gitlab.GitlabGetError as e:
+        if e.response_code == http.HTTPStatus.NOT_FOUND:
+            raise release_by_changelog.exc.ProjectNotFoundError from e
+        raise e
     project_name = f"{project_.namespace.get('full_path')}/{project_.name}"
     console.print(
         f"[bold green]Project found:[/bold green] [bold cyan]{project_name}[bold cyan]"

src/release_by_changelog/cmds/release.py

@@ -76,6 +76,13 @@ def release(
     except release_by_changelog.exc.UnauthorizedError:
         err_console.print("Error: Unauthorized", style="bold red")
         raise typer.Exit(code=1)
+    except release_by_changelog.exc.ProjectNotFoundError:
+        err_console.print(
+            "Error: Project not found.",
+            "Possible remediation: Provide the full path to the project.",
+            style="bold red",
+        )
+        raise typer.Exit(code=1)
 
     console.print(f"Processing [bold cyan]{changelog_path}[/bold cyan]")
     changelog_entry = _last_changelog(changelog_path)
@@ -84,7 +91,29 @@ def release(
         f"[bold cyan]{changelog_entry.version}[/bold cyan]"
     )
 
-    project_, project_name = _project(token, host, project, console)
+    try:
+        project_, project_name = _project(token, host, project, console)
+    except release_by_changelog.exc.UnauthorizedError:
+        err_console.print("Error: Unauthorized", style="bold red")
+        raise typer.Exit(code=1)
+    except release_by_changelog.exc.ProjectNotFoundError:
+        err_console.print(
+            "Error: Project not found.",
+            "Possible remediation:",
+            "\t- Provide the project ID. To find the project ID, go to the project page"
+            ", click on the three vertical dot button on the top right corner and press"
+            " the 'Copy project ID: XXXX' button.",
+            "\t- Provide the full path to the project. To find it, go to the project "
+            "page, check at the url and copy the path after the host. "
+            "If the following link doesn't point to your project, you got the "
+            f"namespace wrong: 'https://{host}/{project}'",
+            "\t- Check if the host is correct. If you are using a self-hosted GitLab, "
+            "you need to provide the correct host. Current host: "
+            f"'https://{host}', is that where your project is hosted?",
+            style="bold red",
+            sep="\n",
+        )
+        raise typer.Exit(code=1)
 
     if interact:
         typer.confirm("Do you confirm release?", default=True, abort=True)

src/release_by_changelog/exc.py

@@ -4,3 +4,7 @@ class UnauthorizedError(Exception):
 
 class ReleaseAlreadyExistError(Exception):
     pass
+
+
+class ProjectNotFoundError(Exception):
+    pass