scripts/rust_is_available_test.py

   1 #!/usr/bin/env python3
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 """Tests the `rust_is_available.sh` script.
   5
   6 Some of the tests require the real programs to be available in `$PATH`
   7 under their canonical name (and with the expected versions).
   8 """
   9
  10 import enum
  11 import os
  12 import pathlib
  13 import stat
  14 import subprocess
  15 import tempfile
  16 import unittest
  17
  18 class TestRustIsAvailable(unittest.TestCase):
  19     @enum.unique
  20     class Expected(enum.Enum):
  21         SUCCESS = enum.auto()
  22         SUCCESS_WITH_WARNINGS = enum.auto()
  23         SUCCESS_WITH_EXTRA_OUTPUT = enum.auto()
  24         FAILURE = enum.auto()
  25
  26     @classmethod
  27     def generate_executable(cls, content):
  28         path = pathlib.Path(cls.tempdir.name)
  29         name = str(len(tuple(path.iterdir())))
  30         path = path / name
  31         with open(path, "w") as file_:
  32             file_.write(content)
  33         os.chmod(path, os.stat(path).st_mode | stat.S_IXUSR)
  34         return path
  35
  36     @classmethod
  37     def generate_clang(cls, stdout):
  38         return cls.generate_executable(f"""#!/usr/bin/env python3
  39 import sys
  40 if "-E" in " ".join(sys.argv):
  41     print({repr("Clang " + " ".join(cls.llvm_default_version.split(" ")))})
  42 else:
  43     print({repr(stdout)})
  44 """)
  45
  46     @classmethod
  47     def generate_rustc(cls, stdout):
  48         return cls.generate_executable(f"""#!/usr/bin/env python3
  49 import sys
  50 if "--print sysroot" in " ".join(sys.argv):
  51     print({repr(cls.rust_default_sysroot)})
  52 else:
  53     print({repr(stdout)})
  54 """)
  55
  56     @classmethod
  57     def generate_bindgen(cls, version_stdout, libclang_stderr):
  58         return cls.generate_executable(f"""#!/usr/bin/env python3
  59 import sys
  60 if "rust_is_available_bindgen_libclang.h" in " ".join(sys.argv):
  61     print({repr(libclang_stderr)}, file=sys.stderr)
  62 else:
  63     print({repr(version_stdout)})
  64 """)
  65
  66     @classmethod
  67     def generate_bindgen_version(cls, stdout):
  68         return cls.generate_bindgen(stdout, cls.bindgen_default_bindgen_libclang_stderr)
  69
  70     @classmethod
  71     def generate_bindgen_libclang(cls, stderr):
  72         return cls.generate_bindgen(cls.bindgen_default_bindgen_version_stdout, stderr)
  73
  74     @classmethod
  75     def setUpClass(cls):
  76         cls.tempdir = tempfile.TemporaryDirectory()
  77
  78         cls.missing = pathlib.Path(cls.tempdir.name) / "missing"
  79
  80         cls.nonexecutable = pathlib.Path(cls.tempdir.name) / "nonexecutable"
  81         with open(cls.nonexecutable, "w") as file_:
  82             file_.write("nonexecutable")
  83
  84         cls.unexpected_binary = "true"
  85
  86         cls.rustc_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "rustc")).decode().strip()
  87         cls.bindgen_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "bindgen")).decode().strip()
  88         cls.llvm_default_version = subprocess.check_output(("scripts/min-tool-version.sh", "llvm")).decode().strip()
  89         cls.rust_default_sysroot = subprocess.check_output(("rustc", "--print", "sysroot")).decode().strip()
  90
  91         cls.bindgen_default_bindgen_version_stdout = f"bindgen {cls.bindgen_default_version}"
  92         cls.bindgen_default_bindgen_libclang_stderr = f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {cls.llvm_default_version} [-W#pragma-messages], err: false"
  93
  94         cls.default_rustc = cls.generate_rustc(f"rustc {cls.rustc_default_version}")
  95         cls.default_bindgen =  cls.generate_bindgen(cls.bindgen_default_bindgen_version_stdout, cls.bindgen_default_bindgen_libclang_stderr)
  96         cls.default_cc = cls.generate_clang(f"clang version {cls.llvm_default_version}")
  97
  98     def run_script(self, expected, override_env):
  99         env = {
 100             "RUSTC": self.default_rustc,
 101             "BINDGEN": self.default_bindgen,
 102             "CC": self.default_cc,
 103         }
 104
 105         for key, value in override_env.items():
 106             if value is None:
 107                 del env[key]
 108                 continue
 109             env[key] = value
 110
 111         result = subprocess.run("scripts/rust_is_available.sh", env=env, capture_output=True)
 112
 113         # The script should never output anything to `stdout`.
 114         self.assertEqual(result.stdout, b"")
 115
 116         if expected == self.Expected.SUCCESS:
 117             # When expecting a success, the script should return 0
 118             # and it should not output anything to `stderr`.
 119             self.assertEqual(result.returncode, 0)
 120             self.assertEqual(result.stderr, b"")
 121         elif expected == self.Expected.SUCCESS_WITH_EXTRA_OUTPUT:
 122             # When expecting a success with extra output (that is not warnings,
 123             # which is the common case), the script should return 0 and it
 124             # should output at least something to `stderr` (the output should
 125             # be checked further by the test).
 126             self.assertEqual(result.returncode, 0)
 127             self.assertNotEqual(result.stderr, b"")
 128         elif expected == self.Expected.SUCCESS_WITH_WARNINGS:
 129             # When expecting a success with warnings, the script should return 0
 130             # and it should output at least the instructions to `stderr`.
 131             self.assertEqual(result.returncode, 0)
 132             self.assertIn(b"Please see Documentation/rust/quick-start.rst for details", result.stderr)
 133         else:
 134             # When expecting a failure, the script should return non-0
 135             # and it should output at least the instructions to `stderr`.
 136             self.assertNotEqual(result.returncode, 0)
 137             self.assertIn(b"Please see Documentation/rust/quick-start.rst for details", result.stderr)
 138
 139         # The output will generally be UTF-8 (i.e. unless the user has
 140         # put strange values in the environment).
 141         result.stderr = result.stderr.decode()
 142
 143         return result
 144
 145     def test_rustc_unset(self):
 146         result = self.run_script(self.Expected.FAILURE, { "RUSTC": None })
 147         self.assertIn("Environment variable 'RUSTC' is not set.", result.stderr)
 148         self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
 149
 150     def test_bindgen_unset(self):
 151         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": None })
 152         self.assertIn("Environment variable 'BINDGEN' is not set.", result.stderr)
 153         self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
 154
 155     def test_cc_unset(self):
 156         result = self.run_script(self.Expected.FAILURE, { "CC": None })
 157         self.assertIn("Environment variable 'CC' is not set.", result.stderr)
 158         self.assertIn("This script is intended to be called from Kbuild.", result.stderr)
 159
 160     def test_rustc_missing(self):
 161         result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.missing })
 162         self.assertIn(f"Rust compiler '{self.missing}' could not be found.", result.stderr)
 163
 164     def test_bindgen_missing(self):
 165         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.missing })
 166         self.assertIn(f"Rust bindings generator '{self.missing}' could not be found.", result.stderr)
 167
 168     def test_rustc_nonexecutable(self):
 169         result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.nonexecutable })
 170         self.assertIn(f"Running '{self.nonexecutable}' to check the Rust compiler version failed with", result.stderr)
 171
 172     def test_rustc_unexpected_binary(self):
 173         result = self.run_script(self.Expected.FAILURE, { "RUSTC": self.unexpected_binary })
 174         self.assertIn(f"Running '{self.unexpected_binary}' to check the Rust compiler version did not return", result.stderr)
 175
 176     def test_rustc_unexpected_name(self):
 177         rustc = self.generate_rustc(f"unexpected {self.rustc_default_version} (a8314ef7d 2022-06-27)")
 178         result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
 179         self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
 180
 181     def test_rustc_unexpected_version(self):
 182         rustc = self.generate_rustc("rustc unexpected (a8314ef7d 2022-06-27)")
 183         result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
 184         self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
 185
 186     def test_rustc_no_minor(self):
 187         rustc = self.generate_rustc(f"rustc {'.'.join(self.rustc_default_version.split('.')[:2])} (a8314ef7d 2022-06-27)")
 188         result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
 189         self.assertIn(f"Running '{rustc}' to check the Rust compiler version did not return", result.stderr)
 190
 191     def test_rustc_old_version(self):
 192         rustc = self.generate_rustc("rustc 1.60.0 (a8314ef7d 2022-06-27)")
 193         result = self.run_script(self.Expected.FAILURE, { "RUSTC": rustc })
 194         self.assertIn(f"Rust compiler '{rustc}' is too old.", result.stderr)
 195
 196     def test_rustc_new_version(self):
 197         rustc = self.generate_rustc("rustc 1.999.0 (a8314ef7d 2099-06-27)")
 198         result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "RUSTC": rustc })
 199         self.assertIn(f"Rust compiler '{rustc}' is too new. This may or may not work.", result.stderr)
 200
 201     def test_bindgen_nonexecutable(self):
 202         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.nonexecutable })
 203         self.assertIn(f"Running '{self.nonexecutable}' to check the Rust bindings generator version failed with", result.stderr)
 204
 205     def test_bindgen_unexpected_binary(self):
 206         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": self.unexpected_binary })
 207         self.assertIn(f"Running '{self.unexpected_binary}' to check the bindings generator version did not return", result.stderr)
 208
 209     def test_bindgen_unexpected_name(self):
 210         bindgen = self.generate_bindgen_version(f"unexpected {self.bindgen_default_version}")
 211         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 212         self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
 213
 214     def test_bindgen_unexpected_version(self):
 215         bindgen = self.generate_bindgen_version("bindgen unexpected")
 216         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 217         self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
 218
 219     def test_bindgen_no_minor(self):
 220         bindgen = self.generate_bindgen_version(f"bindgen {'.'.join(self.bindgen_default_version.split('.')[:2])}")
 221         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 222         self.assertIn(f"Running '{bindgen}' to check the bindings generator version did not return", result.stderr)
 223
 224     def test_bindgen_old_version(self):
 225         bindgen = self.generate_bindgen_version("bindgen 0.50.0")
 226         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 227         self.assertIn(f"Rust bindings generator '{bindgen}' is too old.", result.stderr)
 228
 229     def test_bindgen_new_version(self):
 230         bindgen = self.generate_bindgen_version("bindgen 0.999.0")
 231         result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "BINDGEN": bindgen })
 232         self.assertIn(f"Rust bindings generator '{bindgen}' is too new. This may or may not work.", result.stderr)
 233
 234     def test_bindgen_libclang_failure(self):
 235         for env in (
 236             { "LLVM_CONFIG_PATH": self.missing },
 237             { "LIBCLANG_PATH": self.missing },
 238             { "CLANG_PATH": self.missing },
 239         ):
 240             with self.subTest(env=env):
 241                 result = self.run_script(self.Expected.FAILURE, env | { "PATH": os.environ["PATH"], "BINDGEN": "bindgen" })
 242                 self.assertIn("Running 'bindgen' to check the libclang version (used by the Rust", result.stderr)
 243                 self.assertIn("bindings generator) failed with code ", result.stderr)
 244
 245     def test_bindgen_libclang_unexpected_version(self):
 246         bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version unexpected [-W#pragma-messages], err: false")
 247         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 248         self.assertIn(f"Running '{bindgen}' to check the libclang version (used by the Rust", result.stderr)
 249         self.assertIn("bindings generator) did not return an expected output. See output", result.stderr)
 250
 251     def test_bindgen_libclang_old_version(self):
 252         bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version 10.0.0 [-W#pragma-messages], err: false")
 253         result = self.run_script(self.Expected.FAILURE, { "BINDGEN": bindgen })
 254         self.assertIn(f"libclang (used by the Rust bindings generator '{bindgen}') is too old.", result.stderr)
 255
 256     def test_clang_matches_bindgen_libclang_different_bindgen(self):
 257         bindgen = self.generate_bindgen_libclang("scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version 999.0.0 [-W#pragma-messages], err: false")
 258         result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "BINDGEN": bindgen })
 259         self.assertIn("version does not match Clang's. This may be a problem.", result.stderr)
 260
 261     def test_clang_matches_bindgen_libclang_different_clang(self):
 262         cc = self.generate_clang("clang version 999.0.0")
 263         result = self.run_script(self.Expected.SUCCESS_WITH_WARNINGS, { "CC": cc })
 264         self.assertIn("version does not match Clang's. This may be a problem.", result.stderr)
 265
 266     def test_rustc_src_core_krustflags(self):
 267         result = self.run_script(self.Expected.FAILURE, { "PATH": os.environ["PATH"], "RUSTC": "rustc", "KRUSTFLAGS": f"--sysroot={self.missing}" })
 268         self.assertIn("Source code for the 'core' standard library could not be found", result.stderr)
 269
 270     def test_rustc_src_core_rustlibsrc(self):
 271         result = self.run_script(self.Expected.FAILURE, { "RUST_LIB_SRC": self.missing })
 272         self.assertIn("Source code for the 'core' standard library could not be found", result.stderr)
 273
 274     def test_success_cc_unknown(self):
 275         result = self.run_script(self.Expected.SUCCESS_WITH_EXTRA_OUTPUT, { "CC": self.missing })
 276         self.assertIn("unknown C compiler", result.stderr)
 277
 278     def test_success_cc_multiple_arguments_ccache(self):
 279         clang = self.generate_clang(f"""Ubuntu clang version {self.llvm_default_version}-1ubuntu1
 280 Target: x86_64-pc-linux-gnu
 281 Thread model: posix
 282 InstalledDir: /usr/bin
 283 """)
 284         result = self.run_script(self.Expected.SUCCESS, { "CC": f"{clang} clang" })
 285
 286     def test_success_rustc_version(self):
 287         for rustc_stdout in (
 288             f"rustc {self.rustc_default_version} (a8314ef7d 2022-06-27)",
 289             f"rustc {self.rustc_default_version}-dev (a8314ef7d 2022-06-27)",
 290             f"rustc {self.rustc_default_version}-1.60.0 (a8314ef7d 2022-06-27)",
 291         ):
 292             with self.subTest(rustc_stdout=rustc_stdout):
 293                 rustc = self.generate_rustc(rustc_stdout)
 294                 result = self.run_script(self.Expected.SUCCESS, { "RUSTC": rustc })
 295
 296     def test_success_bindgen_version(self):
 297         for bindgen_stdout in (
 298             f"bindgen {self.bindgen_default_version}",
 299             f"bindgen {self.bindgen_default_version}-dev",
 300             f"bindgen {self.bindgen_default_version}-0.999.0",
 301         ):
 302             with self.subTest(bindgen_stdout=bindgen_stdout):
 303                 bindgen = self.generate_bindgen_version(bindgen_stdout)
 304                 result = self.run_script(self.Expected.SUCCESS, { "BINDGEN": bindgen })
 305
 306     def test_success_bindgen_libclang(self):
 307         for stderr in (
 308             f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (https://github.com/llvm/llvm-project.git 4a2c05b05ed07f1f620e94f6524a8b4b2760a0b1) [-W#pragma-messages], err: false",
 309             f"/home/jd/Documents/dev/kernel-module-flake/linux-6.1/outputs/dev/lib/modules/6.1.0-development/source/scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version}  [-W#pragma-messages], err: false",
 310             f"scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (Fedora 13.0.0-3.fc35) [-W#pragma-messages], err: false",
 311             f"""
 312 /nix/store/dsd5gz46hdbdk2rfdimqddhq6m8m8fqs-bash-5.1-p16/bin/bash: warning: setlocale: LC_ALL: cannot change locale (c)
 313 scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version}  [-W#pragma-messages], err: false
 314 """,
 315             f"""
 316 /nix/store/dsd5gz46hdbdk2rfdimqddhq6m8m8fqs-bash-5.1.0-p16/bin/bash: warning: setlocale: LC_ALL: cannot change locale (c)
 317 /home/jd/Documents/dev/kernel-module-flake/linux-6.1/outputs/dev/lib/modules/6.1.0-development/source/scripts/rust_is_available_bindgen_libclang.h:2:9: warning: clang version {self.llvm_default_version} (Fedora 13.0.0-3.fc35) [-W#pragma-messages], err: false
 318 """
 319         ):
 320             with self.subTest(stderr=stderr):
 321                 bindgen = self.generate_bindgen_libclang(stderr)
 322                 result = self.run_script(self.Expected.SUCCESS, { "BINDGEN": bindgen })
 323
 324     def test_success_clang_version(self):
 325         for clang_stdout in (
 326             f"clang version {self.llvm_default_version} (https://github.com/llvm/llvm-project.git 4a2c05b05ed07f1f620e94f6524a8b4b2760a0b1)",
 327             f"clang version {self.llvm_default_version}-dev",
 328             f"clang version {self.llvm_default_version}-2~ubuntu20.04.1",
 329             f"Ubuntu clang version {self.llvm_default_version}-2~ubuntu20.04.1",
 330         ):
 331             with self.subTest(clang_stdout=clang_stdout):
 332                 clang = self.generate_clang(clang_stdout)
 333                 result = self.run_script(self.Expected.SUCCESS, { "CC": clang })
 334
 335     def test_success_real_programs(self):
 336         for cc in ["gcc", "clang"]:
 337             with self.subTest(cc=cc):
 338                 result = self.run_script(self.Expected.SUCCESS, {
 339                     "PATH": os.environ["PATH"],
 340                     "RUSTC": "rustc",
 341                     "BINDGEN": "bindgen",
 342                     "CC": cc,
 343                 })
 344
 345 if __name__ == "__main__":
 346     unittest.main()