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| """Nice output for Black. | |
| The double calls are for patching purposes in tests. | |
| """ | |
| import json | |
| import tempfile | |
| from typing import Any, Optional | |
| from click import echo, style | |
| from mypy_extensions import mypyc_attr | |
| def _out(message: Optional[str] = None, nl: bool = True, **styles: Any) -> None: | |
| if message is not None: | |
| if "bold" not in styles: | |
| styles["bold"] = True | |
| message = style(message, **styles) | |
| echo(message, nl=nl, err=True) | |
| def _err(message: Optional[str] = None, nl: bool = True, **styles: Any) -> None: | |
| if message is not None: | |
| if "fg" not in styles: | |
| styles["fg"] = "red" | |
| message = style(message, **styles) | |
| echo(message, nl=nl, err=True) | |
| def out(message: Optional[str] = None, nl: bool = True, **styles: Any) -> None: | |
| _out(message, nl=nl, **styles) | |
| def err(message: Optional[str] = None, nl: bool = True, **styles: Any) -> None: | |
| _err(message, nl=nl, **styles) | |
| def ipynb_diff(a: str, b: str, a_name: str, b_name: str) -> str: | |
| """Return a unified diff string between each cell in notebooks `a` and `b`.""" | |
| a_nb = json.loads(a) | |
| b_nb = json.loads(b) | |
| diff_lines = [ | |
| diff( | |
| "".join(a_nb["cells"][cell_number]["source"]) + "\n", | |
| "".join(b_nb["cells"][cell_number]["source"]) + "\n", | |
| f"{a_name}:cell_{cell_number}", | |
| f"{b_name}:cell_{cell_number}", | |
| ) | |
| for cell_number, cell in enumerate(a_nb["cells"]) | |
| if cell["cell_type"] == "code" | |
| ] | |
| return "".join(diff_lines) | |
| def diff(a: str, b: str, a_name: str, b_name: str) -> str: | |
| """Return a unified diff string between strings `a` and `b`.""" | |
| import difflib | |
| a_lines = a.splitlines(keepends=True) | |
| b_lines = b.splitlines(keepends=True) | |
| diff_lines = [] | |
| for line in difflib.unified_diff( | |
| a_lines, b_lines, fromfile=a_name, tofile=b_name, n=5 | |
| ): | |
| # Work around https://bugs.python.org/issue2142 | |
| # See: | |
| # https://www.gnu.org/software/diffutils/manual/html_node/Incomplete-Lines.html | |
| if line[-1] == "\n": | |
| diff_lines.append(line) | |
| else: | |
| diff_lines.append(line + "\n") | |
| diff_lines.append("\\ No newline at end of file\n") | |
| return "".join(diff_lines) | |
| def color_diff(contents: str) -> str: | |
| """Inject the ANSI color codes to the diff.""" | |
| lines = contents.split("\n") | |
| for i, line in enumerate(lines): | |
| if line.startswith("+++") or line.startswith("---"): | |
| line = "\033[1m" + line + "\033[0m" # bold, reset | |
| elif line.startswith("@@"): | |
| line = "\033[36m" + line + "\033[0m" # cyan, reset | |
| elif line.startswith("+"): | |
| line = "\033[32m" + line + "\033[0m" # green, reset | |
| elif line.startswith("-"): | |
| line = "\033[31m" + line + "\033[0m" # red, reset | |
| lines[i] = line | |
| return "\n".join(lines) | |
| def dump_to_file(*output: str, ensure_final_newline: bool = True) -> str: | |
| """Dump `output` to a temporary file. Return path to the file.""" | |
| with tempfile.NamedTemporaryFile( | |
| mode="w", prefix="blk_", suffix=".log", delete=False, encoding="utf8" | |
| ) as f: | |
| for lines in output: | |
| f.write(lines) | |
| if ensure_final_newline and lines and lines[-1] != "\n": | |
| f.write("\n") | |
| return f.name | |