Really aggressive confirmation prompt

kiwi_scp/commands/cli.py

@@ -7,6 +7,7 @@ from typing import List, Tuple, Iterable, Type, Optional, TypeVar
 import click
 
 from ..instance import Instance, Project
+from ..wstring import WParagraph, WAlignment
 
 
 class KiwiCLI(click.MultiCommand):
@@ -84,6 +85,39 @@ class KiwiCommand:
             except Exception as e:
                 click.echo(f"Invalid input: {e}")
 
+    @staticmethod
+    def danger_confirm(*prompt_lines: str, default: Optional[bool] = None) -> bool:
+        if default is True:
+            suffix = "[YES|no]"
+        elif default is False:
+            suffix = "[yes|NO]"
+        else:
+            suffix = "[yes|no]"
+
+        dumb = WParagraph.from_strings(
+            click.style("WARNING", bold=True, underline=True, blink=True, fg="red"),
+            click.style("ここにゴミ", fg="cyan"),
+            click.style("を捨てないで下さい", fg="cyan"),
+            click.style("DO NOT DUMB HERE", fg="yellow"),
+            click.style("NO DUMB AREA", fg="yellow"),
+        ).align().surround("!")
+
+        prompt = WParagraph.from_strings(*prompt_lines).align(WAlignment.LEFT).emphasize(3)
+
+        answer = input(
+            f"{dumb}\n\n"
+            f"{prompt}\n\n"
+            f"Are you sure you want to proceed? {suffix} "
+        ).strip().lower()
+
+        if answer == '':
+            answer = default
+
+        while answer not in ['yes', 'no']:
+            answer = input("Please type 'yes' or 'no' explicitly: ").strip().lower()
+
+        return answer == 'yes'
+
     @classmethod
     def run_for_instance(cls, instance: Instance, **kwargs) -> None:
         for project_config in instance.config.projects:

kiwi_scp/wstring.py

@@ -0,0 +1,104 @@
+import re
+from enum import Enum, auto
+from typing import List
+
+import attr
+import wcwidth
+
+
+class WAlignment(Enum):
+    LEFT = auto()
+    RIGHT = auto()
+    CENTER = auto()
+
+
+@attr.s
+class WString:
+    s: str = attr.ib()
+
+    # from https://stackoverflow.com/a/38662876
+    ANSI_ESCAPES = re.compile(r"(?:\x1B[@-_]|[\x80-\x9F])[0-?]*[ -/]*[@-~]")
+
+    def __str__(self) -> str:
+        return self.s
+
+    def __len__(self) -> int:
+        return wcwidth.wcswidth(WString.ANSI_ESCAPES.sub("", self.s))
+
+    def pad(self, alignment: WAlignment = WAlignment.CENTER, wlen: int = 0, char: str = " ") -> "WString":
+        char = char[0]
+
+        if alignment is WAlignment.LEFT:
+            return WString(f"{self}{char * wlen}")
+        elif alignment is WAlignment.RIGHT:
+            return WString(f"{char * wlen}{self}")
+        else:
+            pad_l, pad_r = wlen // 2, wlen - (wlen // 2)
+            return WString(f"{char * pad_l}{self}{char * pad_r}")
+
+
+@attr.s
+class WParagraph:
+    lines: List[WString] = attr.ib()
+
+    def __str__(self) -> str:
+        return "\n".join(
+            str(line)
+            for line
+            in self.lines
+        )
+
+    @classmethod
+    def from_strings(cls, *source: str) -> "WParagraph":
+        return cls([
+            WString(line)
+            for line
+            in source
+        ])
+
+    def align(self, alignment: WAlignment = WAlignment.CENTER, padding: int = 0, char: str = " ") -> "WParagraph":
+        total_length = max(
+            len(line)
+            for line
+            in self.lines
+        ) + padding
+        pad_lengths = (
+            total_length - len(line)
+            for line
+            in self.lines
+        )
+
+        return WParagraph([
+            line.pad(alignment, wlen, char)
+            for line, wlen
+            in zip(self.lines, pad_lengths)
+        ])
+
+    def surround(self, char: str, padding: int = 1) -> "WParagraph":
+        char = char[0]
+        padding = " " * padding
+
+        l_border, r_border = char + padding, padding + char
+
+        lines = [
+            WString(f"{l_border}{line}{r_border}")
+            for line
+            in self.lines
+        ]
+        extra_line = char * len(lines[0])
+
+        return WParagraph([
+            extra_line,
+            *lines,
+            extra_line,
+        ])
+
+    def emphasize(self, count: int = 3, padding: int = 1) -> "WParagraph":
+        padding = " " * padding
+        l_border, r_border = (">" * count) + padding, padding + ("<" * count)
+
+        return WParagraph([
+            WString(f"{l_border}{line}{r_border}")
+            for line
+            in self.lines
+        ])

poetry.lock

@@ -57,7 +57,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "6.0.2"
+version = "6.1.2"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -323,6 +323,14 @@ six = ">=1.9.0,<2"
 docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)"]
 testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)"]
 
+[[package]]
+name = "wcwidth"
+version = "0.2.5"
+description = "Measures the displayed width of unicode strings in a terminal"
+category = "main"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "zipp"
 version = "3.6.0"
@@ -338,7 +346,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.6.1"
-content-hash = "631c4b1d21036305a2e9c891a631e66106549e1873b91264f481ba29207789fd"
+content-hash = "9083370030b96548400ebb4f9f2a82a3f5dd3a55bd83a9377df492180dc59c3e"
 
 [metadata.files]
 atomicwrites = [
@@ -362,39 +370,53 @@ colorama = [
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
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+    {file = "coverage-6.1.2-cp39-cp39-win32.whl", hash = "sha256:fae3fe111670e51f1ebbc475823899524e3459ea2db2cb88279bbfb2a0b8a3de"},
+    {file = "coverage-6.1.2-cp39-cp39-win_amd64.whl", hash = "sha256:af45eea024c0e3a25462fade161afab4f0d9d9e0d5a5d53e86149f74f0a35ecc"},
+    {file = "coverage-6.1.2-pp36.pp37.pp38-none-any.whl", hash = "sha256:eab14fdd410500dae50fd14ccc332e65543e7b39f6fc076fe90603a0e5d2f929"},
+    {file = "coverage-6.1.2.tar.gz", hash = "sha256:d9a635114b88c0ab462e0355472d00a180a5fbfd8511e7f18e4ac32652e7d972"},
 ]
 dataclasses = [
     {file = "dataclasses-0.8-py3-none-any.whl", hash = "sha256:0201d89fa866f68c8ebd9d08ee6ff50c0b255f8ec63a71c16fda7af82bb887bf"},
@@ -520,6 +542,10 @@ virtualenv = [
     {file = "virtualenv-20.9.0-py2.py3-none-any.whl", hash = "sha256:1d145deec2da86b29026be49c775cc5a9aab434f85f7efef98307fb3965165de"},
     {file = "virtualenv-20.9.0.tar.gz", hash = "sha256:bb55ace18de14593947354e5e6cd1be75fb32c3329651da62e92bf5d0aab7213"},
 ]
+wcwidth = [
+    {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},
+    {file = "wcwidth-0.2.5.tar.gz", hash = "sha256:c4d647b99872929fdb7bdcaa4fbe7f01413ed3d98077df798530e5b04f116c83"},
+]
 zipp = [
     {file = "zipp-3.6.0-py3-none-any.whl", hash = "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"},
     {file = "zipp-3.6.0.tar.gz", hash = "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832"},

pyproject.toml

@@ -10,6 +10,7 @@ attrs = "^21.2.0"
 click = "^8.0.3"
 pydantic = "^1.8.2"
 "ruamel.yaml" = "^0.17.16"
+wcwidth = "^0.2.5"
 
 [tool.poetry.dev-dependencies]
 pytest = "^6.2.5"