Add package hint

setup.py

@@ -9,6 +9,17 @@ setup(
     version='0.4',
     description='A lightweight network emulator embedded in a small '
                 'python library.',
+    long_description=open('README.md').read(),
+    long_description_content_type='text/markdown',
+    classifiers=[
+        'Development Status :: 4 - Beta',
+        'Environment :: Console',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: GNU General Public License v2 (GPLv2)',
+        'Operating System :: POSIX :: Linux',
+        'Programming Language :: Python :: 3',
+        'Topic :: System :: Networking',
+    ],
     author='Martina Ferrari, Alina Quereilhac, Tom Niget',
     author_email='tina@tina.pm, aquereilhac@gmail.com, tom.niget@nexedi.com',
     url='https://lab.nexedi.com/nexedi/nemu3',
@@ -16,5 +27,6 @@ setup(
     platforms='Linux',
     packages=['nemu'],
     install_requires=['unshare', 'six', 'attrs'],
-    package_dir={'': 'src'}
+    package_dir={'': 'src'},
+    python_requires='>=3.11',
 )

src/nemu/environ.py

@@ -58,18 +58,18 @@ def find_bin(name: str, extra_path: Optional[list[str]] = None) -> Optional[str]
     return None
 
 
-def find_bin_or_die(name: str, extra_path: Optional[list[str]] = None) -> str:
+def find_bin_or_die(name: str, hint: str, extra_path: Optional[list[str]] = None) -> str:
     """Try hard to find the location of needed programs; raise on failure."""
     res = find_bin(name, extra_path)
     if not res:
-        raise RuntimeError("Cannot find `%s', impossible to continue." % name)
+        raise RuntimeError(f"Cannot find `{name}', impossible to continue. Try installing the `{hint}` package.")
     return res
 
 
-IP_PATH = find_bin_or_die("ip")
-TC_PATH = find_bin_or_die("tc")
-BRCTL_PATH = find_bin_or_die("brctl")
-SYSCTL_PATH = find_bin_or_die("sysctl")
+IP_PATH = find_bin_or_die("ip", "iproute2")
+TC_PATH = find_bin_or_die("tc", "iproute2")
+BRCTL_PATH = find_bin_or_die("brctl", "bridge-utils")
+SYSCTL_PATH = find_bin_or_die("sysctl", "procps")
 
 # Optional tools
 TCPDUMP_PATH = find_bin("tcpdump")