Clean cli output

src/python_inspector/resolution.py

@@ -633,6 +633,7 @@ def get_resolved_dependencies(
     repos: Sequence[PypiSimpleRepository] = tuple(),
     as_tree: bool = False,
     max_rounds: int = 200000,
+    debug: bool = False,
 ):
     """
     Return resolved dependencies of a ``requirements`` list of Requirement for
@@ -642,10 +643,16 @@ def get_resolved_dependencies(
     Used the provided ``repos`` list of PypiSimpleRepository.
     If empty, use instead the PyPI.org JSON API exclusively instead
     """
-    resolver = Resolver(
-        provider=PythonInputProvider(environment=environment, repos=repos),
-        reporter=BaseReporter(),
-    )
-    results = resolver.resolve(requirements=requirements, max_rounds=max_rounds)
-    results = format_resolution(results, as_tree=as_tree, environment=environment, repos=repos)
-    return results
+    try:
+        resolver = Resolver(
+            provider=PythonInputProvider(environment=environment, repos=repos),
+            reporter=BaseReporter(),
+        )
+        results = resolver.resolve(requirements=requirements, max_rounds=max_rounds)
+        results = format_resolution(results, as_tree=as_tree, environment=environment, repos=repos)
+        return results
+    except Exception as e:
+        if debug:
+            import click
+
+            click.secho(f"{e!r}", err=True)

src/python_inspector/resolve_cli.py

@@ -161,8 +161,8 @@ def resolve_dependencies(
 
         dad --spec "flask==2.1.2" --json -
     """
-
-    click.secho(f"Resolving dependencies...")
+    if debug:
+        click.secho(f"Resolving dependencies...")
 
     netrc = None
     if netrc_file:
@@ -184,7 +184,8 @@ def resolve_dependencies(
         direct_dependencies.append(dep)
 
     if not direct_dependencies:
-        click.secho("Error: no requirements requested.")
+        if debug:
+            click.secho("Error: no requirements requested.")
         sys.exit(1)
 
     if debug:
@@ -235,6 +236,7 @@ def resolve_dependencies(
         repos=repos,
         as_tree=False,
         max_rounds=max_rounds,
+        debug=debug,
     )
 
     cli_options = [f"--requirement {rf}" for rf in requirement_files]
@@ -271,7 +273,9 @@ def resolve_dependencies(
         click.secho("done!")
 
 
-def resolve(direct_dependencies, environment, repos=tuple(), as_tree=False, max_rounds=200000):
+def resolve(
+    direct_dependencies, environment, repos=tuple(), as_tree=False, max_rounds=200000, debug=False
+):
     """
     Resolve dependencies given a ``direct_dependencies`` list of
     DependentPackage and return a tuple of (initial_requirements,
@@ -288,6 +292,7 @@ def resolve(direct_dependencies, environment, repos=tuple(), as_tree=False, max_
         repos=repos,
         as_tree=as_tree,
         max_rounds=max_rounds,
+        debug=debug,
     )
 
     initial_requirements = [d.to_dict() for d in direct_dependencies]