feat(ux): add error better ux for hash not found

src/poetry/console/exceptions.py

@@ -1,11 +1,65 @@
 from __future__ import annotations
 
+import dataclasses
+
+from typing import TYPE_CHECKING
+
 from cleo.exceptions import CleoError
 
 
+if TYPE_CHECKING:
+    from cleo.io.io import IO
+
+
 class PoetryConsoleError(CleoError):
     pass
 
 
 class GroupNotFoundError(PoetryConsoleError):
     pass
+
+
+@dataclasses.dataclass
+class ConsoleMessage:
+    text: str
+    debug: bool = False
+
+    @property
+    def stripped(self) -> str:
+        from cleo._utils import strip_tags
+
+        return strip_tags(self.text)
+
+
+class PoetryRuntimeError(PoetryConsoleError):
+    def __init__(
+        self,
+        reason: str,
+        messages: list[ConsoleMessage] | None = None,
+        exit_code: int = 1,
+    ) -> None:
+        super().__init__(reason)
+        self.exit_code = exit_code
+        self._messages = messages or []
+        self._messages.insert(0, ConsoleMessage(reason + ("\n" if messages else "")))
+
+    def write(self, io: IO) -> None:
+        io.write_error_line(self.get_text(debug=io.is_verbose(), strip=False))
+
+    def get_text(
+        self, debug: bool = False, indent: str = "", strip: bool = False
+    ) -> str:
+        text = ""
+        for message in self._messages:
+            if message.debug and not debug:
+                continue
+
+            message_text = message.stripped if strip else message.text
+            if indent:
+                message_text = f"\n{indent}".join(message_text.splitlines())
+            text += f"{indent}{message_text}\n{indent}\n"
+
+        return text.rstrip(f"{indent}\n")
+
+    def __str__(self) -> str:
+        return self._messages[0].stripped.strip()

src/poetry/installation/chooser.py

@@ -8,6 +8,8 @@
 
 from poetry.config.config import Config
 from poetry.config.config import PackageFilterPolicy
+from poetry.console.exceptions import ConsoleMessage
+from poetry.console.exceptions import PoetryRuntimeError
 from poetry.repositories.http_repository import HTTPRepository
 from poetry.utils.helpers import get_highest_priority_hash_type
 from poetry.utils.wheel import Wheel
@@ -134,11 +136,28 @@ def _get_links(self, package: Package) -> list[Link]:
             selected_links.append(link)
 
         if links and not selected_links:
-            links_str = ", ".join(f"{link}({h})" for link, h in skipped)
-            raise RuntimeError(
-                f"Retrieved digests for links {links_str} not in poetry.lock"
-                f" metadata {locked_hashes}"
-            )
+            reason = f"Downloaded distributions for <b>{package.pretty_name} ({package.pretty_version})</> did not match any known checksums in your lock file."
+            link_hashes = "\n".join(f"  - {link}({h})" for link, h in skipped)
+            known_hashes = "\n".join(f"  - {h}" for h in locked_hashes)
+            messages = [
+                ConsoleMessage(
+                    "<options=bold>Causes:</>\n"
+                    "  - invalid or corrupt cache either during locking or installation\n"
+                    "  - network interruptions or errors causing corrupted downloads\n\n"
+                    "<b>Solutions:</>\n"
+                    "  1. Try running your command again using the <c1>--no-cache</> global option enabled.\n"
+                    "  2. Try regenerating your lock file using (<c1>poetry lock --no-cache --regenerate</>).\n\n"
+                    "If any of those solutions worked, you will have to clear your caches using (<c1>poetry cache clear --all CACHE_NAME</>)."
+                ),
+                ConsoleMessage(
+                    f"Poetry retrieved the following links:\n"
+                    f"{link_hashes}\n\n"
+                    f"The lockfile contained only the following hashes:\n"
+                    f"{known_hashes}",
+                    debug=True,
+                ),
+            ]
+            raise PoetryRuntimeError(reason, messages)
 
         return selected_links
 

src/poetry/installation/executor.py

@@ -16,6 +16,7 @@
 
 from poetry.core.packages.utils.link import Link
 
+from poetry.console.exceptions import PoetryRuntimeError
 from poetry.installation.chef import Chef
 from poetry.installation.chooser import Chooser
 from poetry.installation.operations import Install
@@ -333,6 +334,10 @@ def _execute_operation(self, operation: Operation) -> None:
                             f" for {pkg.pretty_name}."
                             "</error>"
                         )
+                    elif isinstance(e, PoetryRuntimeError):
+                        message = e.get_text(io.is_verbose(), indent="    | ").rstrip()
+                        message = f"<warning>{message}</>"
+                        with_trace = False
                     else:
                         message = f"<error>Cannot install {pkg.pretty_name}.</error>"
 

tests/installation/test_chooser.py

@@ -8,6 +8,7 @@
 from packaging.tags import Tag
 from poetry.core.packages.package import Package
 
+from poetry.console.exceptions import PoetryRuntimeError
 from poetry.installation.chooser import Chooser
 from poetry.repositories.legacy_repository import LegacyRepository
 from poetry.repositories.pypi_repository import PyPiRepository
@@ -366,9 +367,15 @@ def test_chooser_throws_an_error_if_package_hashes_do_not_match(
 
     package.files = files
 
-    with pytest.raises(RuntimeError) as e:
+    with pytest.raises(PoetryRuntimeError) as e:
         chooser.choose_for(package)
-    assert files[0]["hash"] in str(e)
+
+    reason = f"Downloaded distributions for {package.name} ({package.version}) did not match any known checksums in your lock file."
+    assert str(e.value) == reason
+
+    text = e.value.get_text(debug=True, strip=True)
+    assert reason in text
+    assert files[0]["hash"] in text
 
 
 def test_chooser_md5_remote_fallback_to_sha256_inline_calculation(