Wrap long lines to comply with flake8 E501 (#4985)

* Update flake8 settings

* Add poetry to isort namespace packages

* Ignore flake8 E501 for long test names

* Run automatic string formatting on tests

* Run automatic string formatting on src

* Fix typo "already exits"

* Ignore long URLs, hashes, and paths

* Fix in-line comments

* Fix in-line comments in tests

* Fix docstrings

* Ignore misc

* Fix f-strings in src

* Fix f-strings in tests

* Fix multi-line strings in src

* Fix multi-line strings in tests

* Fix some oddly autoformatted code

* Replace some strings by multi-line strings

* Revert namespace change

* Add black string processing to pre-commit

* Move black pre-commit config to pyproject.toml

* Autoformat install scripts

* Manual line wrapping for install scripts

* Disable black formatting for expected strings

* Replace strings by constant

.flake8

@@ -12,8 +12,6 @@ enable-extensions = TC, TC2
 type-checking-exempt-modules = typing, typing-extensions
 eradicate-whitelist-extend = ^-.*;
 extend-ignore =
-    # E501: Line too long (FIXME: long string constants)
-    E501,
     # E203: Whitespace before ':' (pycqa/pycodestyle#373)
     E203,
     # SIM106: Handle error-cases first

get-poetry.py

@@ -458,21 +458,21 @@ def _is_supported(x):
             print(
                 colorize(
                     "error",
-                    "Version {version} does not support this installation method. Please specify a version prior to "
-                    "1.2.0a1 explicitly using the '--version' option.\n"
-                    "Please see "
-                    "https://python-poetry.org/blog/announcing-poetry-1-2-0a1.html#deprecation-of-the-get-poetry-py-script "
-                    "for more information.".format(version=version),
+                    "Version {version} does not support this installation method."
+                    " Please specify a version prior to 1.2.0a1 explicitly using the"
+                    " '--version' option.\nPlease see"
+                    " https://python-poetry.org/blog/announcing-poetry-1-2-0a1.html#deprecation-of-the-get-poetry-py-script"
+                    " for more information.".format(version=version),
                 )
             )
             return None, None
 
         print(
             colorize(
                 "warning",
-                "This installer is deprecated. "
-                "Poetry versions installed using this script will not be able to use 'self update' command to upgrade to "
-                "1.2.0a1 or later.",
+                "This installer is deprecated. Poetry versions installed using this"
+                " script will not be able to use 'self update' command to upgrade to"
+                " 1.2.0a1 or later.",
             )
         )
 
@@ -685,7 +685,8 @@ def _which_python(self):
                 return executable
 
             if fallback is None:
-                # keep this one as the fallback; it was the first valid executable we found.
+                # keep this one as the fallback; it was the first valid executable we
+                # found.
                 fallback = executable
 
         if fallback is None:
@@ -773,7 +774,8 @@ def add_to_fish_path(self):
             print(
                 colorize(
                     "warning",
-                    "\nUnable to get the PATH value. It will not be updated automatically.",
+                    "\nUnable to get the PATH value. It will not be updated"
+                    " automatically.",
                 )
             )
             self._modify_path = False
@@ -808,7 +810,8 @@ def add_to_windows_path(self):
             print(
                 colorize(
                     "warning",
-                    "Unable to get the PATH value. It will not be updated automatically",
+                    "Unable to get the PATH value. It will not be updated"
+                    " automatically",
                 )
             )
             self._modify_path = False
@@ -1074,8 +1077,10 @@ def main():
         "--file",
         dest="file",
         action="store",
-        help="Install from a local file instead of fetching the latest version "
-        "of Poetry available online.",
+        help=(
+            "Install from a local file instead of fetching the latest version "
+            "of Poetry available online."
+        ),
     )
 
     args = parser.parse_args()

install-poetry.py

@@ -273,7 +273,8 @@ def __init__(self, return_code: int = 0, log: Optional[str] = None):
 class VirtualEnvironment:
     def __init__(self, path: Path) -> None:
         self._path = path
-        # str is required for compatibility with subprocess run on CPython <= 3.7 on Windows
+        # str is required for compatibility with subprocess run on CPython <= 3.7 on
+        # Windows
         self._python = str(
             self._path.joinpath("Scripts/python.exe" if WINDOWS else "bin/python")
         )
@@ -313,7 +314,8 @@ def make(cls, target: Path) -> "VirtualEnvironment":
 
         env = cls(target)
 
-        # we do this here to ensure that outdated system default pip does not trigger older bugs
+        # we do this here to ensure that outdated system default pip does not trigger
+        # older bugs
         env.pip("install", "--disable-pip-version-check", "--upgrade", "pip")
 
         return env
@@ -480,7 +482,8 @@ def _is_self_upgrade_supported(x):
             mx = self.VERSION_REGEX.match(x)
 
             if mx is None:
-                # the version is not semver, perhaps scm or file, we assume upgrade is supported
+                # the version is not semver, perhaps scm or file, we assume upgrade is
+                # supported
                 return True
 
             vx = tuple(int(p) for p in mx.groups()[:3]) + (mx.group(5),)
@@ -490,8 +493,9 @@ def _is_self_upgrade_supported(x):
             self._write(
                 colorize(
                     "warning",
-                    f"You are installing {version}. When using the current installer, this version does not support "
-                    f"updating using the 'self update' command. Please use 1.1.7 or later.",
+                    f"You are installing {version}. When using the current installer,"
+                    " this version does not support updating using the 'self update'"
+                    " command. Please use 1.1.7 or later.",
                 )
             )
             if not self._accept_all:
@@ -883,7 +887,10 @@ def main():
                 text=True,
             )
             installer._write(colorize("error", f"See {path} for error logs."))
-            text = f"{e.log}\nTraceback:\n\n{''.join(traceback.format_tb(e.__traceback__))}"
+            text = (
+                f"{e.log}\n"
+                f"Traceback:\n\n{''.join(traceback.format_tb(e.__traceback__))}"
+            )
             Path(path).write_text(text)
 
         return e.return_code
@@ -893,8 +900,9 @@ def main():
     sys.stdout.write(
         colorize(
             "warning",
-            "The canonical source for Poetry's installation script is now https://install.python-poetry.org. "
-            "Please update your usage to reflect this.\n",
+            "The canonical source for Poetry's installation script is now"
+            " https://install.python-poetry.org. Please update your usage to reflect"
+            " this.\n",
         )
     )
     sys.exit(main())

pyproject.toml

@@ -89,6 +89,7 @@ extend_skip = ["setup.py"]
 
 [tool.black]
 target-version = ['py36']
+experimental_string_processing = true
 force-exclude = '''
 .*/setup\.py$
 '''

src/poetry/__init__.py

@@ -1 +1 @@
-__path__ = __import__("pkgutil").extend_path(__path__, __name__)  # type: ignore[has-type]
+__path__ = __import__("pkgutil").extend_path(__path__, __name__)  # type: ignore[has-type]  # noqa: E501

src/poetry/console/application.py

@@ -353,7 +353,7 @@ def _get_solution_provider_repository(self) -> "SolutionProviderRepository":
             SolutionProviderRepository,
         )
 
-        from poetry.mixology.solutions.providers.python_requirement_solution_provider import (
+        from poetry.mixology.solutions.providers.python_requirement_solution_provider import (  # noqa: E501
             PythonRequirementSolutionProvider,
         )
 

src/poetry/console/commands/about.py

@@ -9,8 +9,11 @@ class AboutCommand(Command):
 
     def handle(self) -> None:
         self.line(
-            """<info>Poetry - Package Management for Python</info>
+            """\
+<info>Poetry - Package Management for Python</info>
 
-<comment>Poetry is a dependency manager tracking local dependencies of your projects and libraries.
-See <fg=blue>https://github.com/python-poetry/poetry</> for more information.</comment>"""
+<comment>Poetry is a dependency manager tracking local dependencies of your projects\
+ and libraries.
+See <fg=blue>https://github.com/python-poetry/poetry</> for more information.</comment>\
+"""
         )

src/poetry/console/commands/add.py

@@ -54,24 +54,31 @@ class AddCommand(InstallerCommand, InitCommand):
         option(
             "dry-run",
             None,
-            "Output the operations but do not execute anything (implicitly enables --verbose).",
+            "Output the operations but do not execute anything (implicitly enables"
+            " --verbose).",
         ),
         option("lock", None, "Do not perform operations (only update the lockfile)."),
     ]
-    help = (
-        "The add command adds required packages to your <comment>pyproject.toml</> and installs them.\n\n"
-        "If you do not specify a version constraint, poetry will choose a suitable one based on the available package versions.\n\n"
-        "You can specify a package in the following forms:\n"
-        "  - A single name (<b>requests</b>)\n"
-        "  - A name and a constraint (<b>requests@^2.23.0</b>)\n"
-        "  - A git url (<b>git+https://github.com/python-poetry/poetry.git</b>)\n"
-        "  - A git url with a revision (<b>git+https://github.com/python-poetry/poetry.git#develop</b>)\n"
-        "  - A git SSH url (<b>git+ssh://github.com/python-poetry/poetry.git</b>)\n"
-        "  - A git SSH url with a revision (<b>git+ssh://github.com/python-poetry/poetry.git#develop</b>)\n"
-        "  - A file path (<b>../my-package/my-package.whl</b>)\n"
-        "  - A directory (<b>../my-package/</b>)\n"
-        "  - A url (<b>https://example.com/packages/my-package-0.1.0.tar.gz</b>)\n"
-    )
+    help = """\
+The add command adds required packages to your <comment>pyproject.toml</> and installs\
+ them.
+
+If you do not specify a version constraint, poetry will choose a suitable one based on\
+ the available package versions.
+
+You can specify a package in the following forms:
+  - A single name (<b>requests</b>)
+  - A name and a constraint (<b>requests@^2.23.0</b>)
+  - A git url (<b>git+https://github.com/python-poetry/poetry.git</b>)
+  - A git url with a revision\
+ (<b>git+https://github.com/python-poetry/poetry.git#develop</b>)
+  - A git SSH url (<b>git+ssh://github.com/python-poetry/poetry.git</b>)
+  - A git SSH url with a revision\
+ (<b>git+ssh://github.com/python-poetry/poetry.git#develop</b>)
+  - A file path (<b>../my-package/my-package.whl</b>)
+  - A directory (<b>../my-package/</b>)
+  - A url (<b>https://example.com/packages/my-package-0.1.0.tar.gz</b>)
+"""
 
     loggers = ["poetry.repositories.pypi_repository", "poetry.inspection.info"]
 
@@ -244,11 +251,13 @@ def get_existing_packages_from_input(
 
     def notify_about_existing_packages(self, existing_packages: List[str]) -> None:
         self.line(
-            "The following packages are already present in the pyproject.toml and will be skipped:\n"
+            "The following packages are already present in the pyproject.toml and will"
+            " be skipped:\n"
         )
         for name in existing_packages:
             self.line(f"  • <c1>{name}</c1>")
         self.line(
-            "\nIf you want to update it to the latest compatible version, you can use `poetry update package`.\n"
-            "If you prefer to upgrade it to the latest available version, you can use `poetry add package@latest`.\n"
+            "\nIf you want to update it to the latest compatible version, you can use"
+            " `poetry update package`.\nIf you prefer to upgrade it to the latest"
+            " available version, you can use `poetry add package@latest`.\n"
         )

src/poetry/console/commands/cache/clear.py

@@ -42,8 +42,7 @@ def handle(self) -> int:
         if len(parts) == 1:
             if not self.option("all"):
                 raise RuntimeError(
-                    "Add the --all option if you want to clear all "
-                    f"{parts[0]} caches"
+                    f"Add the --all option if you want to clear all {parts[0]} caches"
                 )
 
             if not os.path.exists(str(cache_dir)):

src/poetry/console/commands/env/info.py

@@ -40,12 +40,15 @@ def _display_complete_info(self, env: "Env") -> None:
         listing = [
             f"<info>Python</info>:         <comment>{env_python_version}</>",
             f"<info>Implementation</info>: <comment>{env.python_implementation}</>",
-            f"<info>Path</info>:           <comment>{env.path if env.is_venv() else 'NA'}</>",
-            f"<info>Executable</info>:     <comment>{env.python if env.is_venv() else 'NA'}</>",
+            "<info>Path</info>:          "
+            f" <comment>{env.path if env.is_venv() else 'NA'}</>",
+            "<info>Executable</info>:    "
+            f" <comment>{env.python if env.is_venv() else 'NA'}</>",
         ]
         if env.is_venv():
             listing.append(
-                f"<info>Valid</info>:          <{'comment' if env.is_sane() else 'error'}>{env.is_sane()}</>"
+                "<info>Valid</info>:         "
+                f" <{'comment' if env.is_sane() else 'error'}>{env.is_sane()}</>"
             )
         self.line("\n".join(listing))
 

src/poetry/console/commands/env/remove.py

@@ -12,17 +12,18 @@ class EnvRemoveCommand(Command):
     arguments = [
         argument(
             "python",
-            "The python executables associated with, or names of the virtual environments which are to "
-            "be removed.",
+            "The python executables associated with, or names of the virtual"
+            " environments which are to be removed.",
             optional=True,
             multiple=True,
         )
     ]
     options = [
         option(
             "all",
-            description="Remove all managed virtual environments associated with the "
-            "project.",
+            description=(
+                "Remove all managed virtual environments associated with the project."
+            ),
         ),
     ]
 

src/poetry/console/commands/init.py

@@ -54,7 +54,8 @@ class InitCommand(Command):
     ]
 
     help = """\
-The <c1>init</c1> command creates a basic <comment>pyproject.toml</> file in the current directory.
+The <c1>init</c1> command creates a basic <comment>pyproject.toml</> file in the\
+ current directory.
 """
 
     def __init__(self) -> None:
@@ -76,13 +77,15 @@ def handle(self) -> int:
         if pyproject.file.exists():
             if pyproject.is_poetry_project():
                 self.line(
-                    "<error>A pyproject.toml file with a poetry section already exists.</error>"
+                    "<error>A pyproject.toml file with a poetry section already"
+                    " exists.</error>"
                 )
                 return 1
 
             if pyproject.data.get("build-system"):
                 self.line(
-                    "<error>A pyproject.toml file with a defined build-system already exists.</error>"
+                    "<error>A pyproject.toml file with a defined build-system already"
+                    " exists.</error>"
                 )
                 return 1
 
@@ -91,7 +94,8 @@ def handle(self) -> int:
         if self.io.is_interactive():
             self.line("")
             self.line(
-                "This command will guide you through creating your <info>pyproject.toml</> config."
+                "This command will guide you through creating your"
+                " <info>pyproject.toml</> config."
             )
             self.line("")
 
@@ -165,16 +169,18 @@ def handle(self) -> int:
             )
 
         question = "Would you like to define your main dependencies interactively?"
-        help_message = (
-            "You can specify a package in the following forms:\n"
-            "  - A single name (<b>requests</b>)\n"
-            "  - A name and a constraint (<b>requests@^2.23.0</b>)\n"
-            "  - A git url (<b>git+https://github.com/python-poetry/poetry.git</b>)\n"
-            "  - A git url with a revision (<b>git+https://github.com/python-poetry/poetry.git#develop</b>)\n"
-            "  - A file path (<b>../my-package/my-package.whl</b>)\n"
-            "  - A directory (<b>../my-package/</b>)\n"
-            "  - A url (<b>https://example.com/packages/my-package-0.1.0.tar.gz</b>)\n"
-        )
+        help_message = """\
+You can specify a package in the following forms:
+  - A single name (<b>requests</b>)
+  - A name and a constraint (<b>requests@^2.23.0</b>)
+  - A git url (<b>git+https://github.com/python-poetry/poetry.git</b>)
+  - A git url with a revision\
+ (<b>git+https://github.com/python-poetry/poetry.git#develop</b>)
+  - A file path (<b>../my-package/my-package.whl</b>)
+  - A directory (<b>../my-package/</b>)
+  - A url (<b>https://example.com/packages/my-package-0.1.0.tar.gz</b>)
+"""
+
         help_displayed = False
         if self.confirm(question, True):
             if self.io.is_interactive():
@@ -280,11 +286,13 @@ def _determine_requirements(
                         choices.append(found_package.pretty_name)
 
                     self.line(
-                        f"Found <info>{len(matches)}</info> packages matching <c1>{package}</c1>"
+                        f"Found <info>{len(matches)}</info> packages matching"
+                        f" <c1>{package}</c1>"
                     )
 
                     package = self.choice(
-                        "\nEnter package # to add, or the complete package name if it is not listed",
+                        "\nEnter package # to add, or the complete package name if it"
+                        " is not listed",
                         choices,
                         attempts=3,
                     )
@@ -310,7 +318,8 @@ def _determine_requirements(
                         )
 
                         self.line(
-                            f"Using version <b>{package_constraint}</b> for <c1>{package}</c1>"
+                            f"Using version <b>{package_constraint}</b> for"
+                            f" <c1>{package}</c1>"
                         )
 
                     constraint["version"] = package_constraint