feat(script): gen screenshot for cli helps

Author: Ellie-Yen

scripts/tasks.py

@@ -0,0 +1,46 @@
+import os
+from pathlib import Path
+
+from invoke import task
+from invoke.context import Context
+from rich.console import Console
+
+from commitizen.cli import data
+
+project_root = Path(__file__).parent.parent.absolute()
+images_root = project_root / Path("docs") / Path("images") / Path("cli_help")
+
+
+@task
+def task_generate_help_screenshots(ctx: Context) -> None:
+    """Generate the screenshot for help message on each tasks"""
+    if not os.path.exists(images_root):
+        os.makedirs(images_root)
+        print(f'created {images_root}')
+
+    with ctx.cd(project_root):
+        help_cmds = _list_help_cmds()
+        for cmd in help_cmds:
+            file_name = f"{cmd.replace(' ', '_').replace('-', '_')}.svg"
+            _export_cmd_as_svg(ctx, cmd, f"{images_root}/{file_name}")
+
+def _list_help_cmds() -> list[str]:
+    cmds = [
+        f"{data['prog']} --help"
+    ] + list(
+        map(lambda sub_c: f"{data['prog']} {sub_c['name'] if isinstance(sub_c['name'], str) else sub_c['name'][0]} --help",
+            data['subcommands']['commands'])
+        )
+
+    return cmds
+
+def _export_cmd_as_svg(ctx: Context, cmd: str, file_name: str) -> None:
+    stdout = ctx.run(cmd, hide="both").stdout
+    console = Console(record=True, width=80)
+    console.print(f"$ {cmd}\n{stdout}")
+    console.save_svg(file_name, title="")
+
+# entry point
+def run_generate_help_screenshots():
+    ctx = Context()
+    task_generate_help_screenshots(ctx)