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pantsbuild / pants / 20974506033

13 Jan 2026 10:14PM UTC coverage: 43.251% (-37.0%) from 80.269%
20974506033

Pull #22976

github

web-flow
Merge a16a40040 into c12556724
Pull Request #22976: WIP: Add the ability to set stdin for a Process

2 of 4 new or added lines in 2 files covered. (50.0%)

17213 existing lines in 540 files now uncovered.

26146 of 60452 relevant lines covered (43.25%)

0.86 hits per line

Source File
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45.95
/src/python/pants/backend/go/util_rules/embedcfg.py
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# Copyright 2021 Pants project contributors (see CONTRIBUTORS.md).
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# Licensed under the Apache License, Version 2.0 (see LICENSE).
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from __future__ import annotations
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import json
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from collections.abc import Iterable, Mapping
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from dataclasses import dataclass
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from typing import Any
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from pants.util.frozendict import FrozenDict
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from pants.util.strutil import strip_prefix
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@dataclass(frozen=True)
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class EmbedConfig:
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    patterns: FrozenDict[str, tuple[str, ...]]
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    files: FrozenDict[str, str]
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    def __init__(self, patterns: Mapping[str, Iterable[str]], files: Mapping[str, str]) -> None:
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        """Configuration passed to the Go compiler to configure file embedding.
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        The compiler relies entirely on the caller to map embed patterns to actual filesystem
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        paths. All embed patterns
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        contained in the package must be mapped. Consult
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        `FirstPartyPkgAnalysis.embed_patterns` for the embed patterns obtained from analysis.
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        :param patterns: Maps each pattern provided via a //go:embed directive to a list of file
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          paths relative to the package directory for files to embed for that pattern. When the
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          embedded variable is an `embed.FS`, those relative file paths define the virtual
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          directory hierarchy exposed by the embed.FS filesystem abstraction. The relative file
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          paths are resolved to actual filesystem paths for their content by consulting the
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          `files` dictionary.
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        :param files: Maps each virtual, relative file path used as a value in the `patterns`
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          dictionary to the actual filesystem path with that file's content.
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        """
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        object.__setattr__(self, "patterns", FrozenDict({k: tuple(v) for k, v in patterns.items()}))
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        object.__setattr__(self, "files", FrozenDict(files))
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    @classmethod
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    def from_json_dict(
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        cls, d: dict[str, Any], prefix_to_strip: str | None = None
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    ) -> EmbedConfig | None:
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        patterns = d.get("Patterns", {})
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        files = d.get("Files", {})
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        if prefix_to_strip:
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            files = {key: strip_prefix(value, prefix_to_strip) for key, value in files.items()}
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        result = cls(
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            patterns=FrozenDict({key: tuple(value) for key, value in patterns.items()}),
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            files=FrozenDict(files),
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        )
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        return result if result else None
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    def to_embedcfg(self) -> bytes:
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        data = {
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            "Patterns": dict(self.patterns),
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            "Files": dict(self.files),
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        }
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        return json.dumps(data).encode("utf-8")
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    def __bool__(self) -> bool:
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        return bool(self.patterns) or bool(self.files)
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    def merge(self, other: EmbedConfig) -> EmbedConfig:
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        """Merge two EmbedConfig's into one.
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        Overlapping keys must have the same values.
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        """
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        overlapping_patterns_keys = set(self.patterns.keys()) & set(other.patterns.keys())
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        for key in overlapping_patterns_keys:
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            if self.patterns[key] != other.patterns[key]:
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                raise AssertionError(
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                    "Unable to merge conflicting golang file embed configurations. This should not have occurred. "
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                    "Please open an issue at https://github.com/pantsbuild/pants/issues/new/choose "
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                    "with the following information: "
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                    f"Patterns Key: {key}; Left: {self.patterns[key]}; Right: {other.patterns[key]} "
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                )
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        overlapping_files_keys = set(self.files.keys()) & set(other.files.keys())
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        for key in overlapping_files_keys:
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            if self.files[key] != other.files[key]:
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                raise AssertionError(
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                    "Unable to merge conflicting golang file embed configurations. This should not have occurred. "
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                    "Please open an issue at https://github.com/pantsbuild/pants/issues/new/choose "
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                    "with the following information: "
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                    f"Files Key: {key}; Left: {self.patterns[key]}; Right: {other.patterns[key]} "
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                )
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        return EmbedConfig(
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            patterns={**self.patterns, **other.patterns},
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            files={**self.files, **other.files},
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        )
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