fix: put some default options to stack group (#568)

Global options `--token` and `--github-server` are related to the `stack` group and should not have their defaults computed for other groups since they may break others commands.

--debug is still a global option:

$ `mergify --debug stack push`

This does not work anymore:

$ `mergify --token foobar stack push`

Global `stack` options are to be passed like this:

$ `mergify stack --token foobar push`

mergify_cli/cli.py

@@ -15,80 +15,28 @@
 
 from __future__ import annotations
 
-import asyncio
-import os
-from urllib import parse
-
 import click
 import click.decorators
 import click_default_group
 
 from mergify_cli import VERSION
-from mergify_cli import console
-from mergify_cli import utils
 from mergify_cli.ci import cli as ci_cli_mod
 from mergify_cli.stack import cli as stack_cli_mod
 
 
-async def get_default_github_server() -> str:
-    try:
-        result = await utils.git("config", "--get", "mergify-cli.github-server")
-    except utils.CommandError:
-        result = ""
-
-    url = parse.urlparse(result or "https://api.github.com/")
-    url = url._replace(scheme="https")
-
-    if url.hostname == "api.github.com":
-        url = url._replace(path="")
-    else:
-        url = url._replace(path="/api/v3")
-    return url.geturl()
-
-
-async def get_default_token() -> str:
-    token = os.environ.get("GITHUB_TOKEN", "")
-    if not token:
-        try:
-            token = await utils.run_command("gh", "auth", "token")
-        except utils.CommandError:
-            console.print(
-                "error: please make sure that gh client is installed and you are authenticated, or set the "
-                "'GITHUB_TOKEN' environment variable",
-            )
-    if utils.is_debug():
-        console.print(f"[purple]DEBUG: token: {token}[/]")
-    return token
-
-
 @click.group(
     cls=click_default_group.DefaultGroup,
     default="stack",
     default_if_no_args=True,
 )
 @click.option("--debug", is_flag=True, default=False, help="debug mode")
 @click.version_option(VERSION)
-@click.option(
-    "--github-server",
-    default=lambda: asyncio.run(get_default_github_server()),
-)
-@click.option(
-    "--token",
-    default=lambda: asyncio.run(get_default_token()),
-    help="GitHub personal access token",
-)
 @click.pass_context
 def cli(
     ctx: click.Context,
     debug: bool,
-    github_server: str,
-    token: str,
 ) -> None:
-    ctx.obj = {
-        "debug": debug,
-        "github_server": github_server,
-        "token": token,
-    }
+    ctx.obj = {"debug": debug}
 
 
 cli.add_command(stack_cli_mod.stack)

mergify_cli/stack/cli.py

@@ -1,8 +1,11 @@
 import asyncio
+import os
+from urllib import parse
 
 import click
 import click_default_group
 
+from mergify_cli import console
 from mergify_cli import utils
 from mergify_cli.stack import checkout as stack_checkout_mod
 from mergify_cli.stack import edit as stack_edit_mod
@@ -25,11 +28,68 @@ def trunk_type(
     return result[0], result[1]
 
 
+async def get_default_github_server() -> str:
+    try:
+        result = await utils.git("config", "--get", "mergify-cli.github-server")
+    except utils.CommandError:
+        result = ""
+
+    url = parse.urlparse(result or "https://api.github.com/")
+    url = url._replace(scheme="https")
+
+    if url.hostname == "api.github.com":
+        url = url._replace(path="")
+    else:
+        url = url._replace(path="/api/v3")
+    return url.geturl()
+
+
+async def get_default_token() -> str:
+    token = os.environ.get("GITHUB_TOKEN", "")
+    if not token:
+        try:
+            token = await utils.run_command("gh", "auth", "token")
+        except utils.CommandError:
+            console.print(
+                "error: please make sure that gh client is installed and you are authenticated, or set the "
+                "'GITHUB_TOKEN' environment variable",
+            )
+    if utils.is_debug():
+        console.print(f"[purple]DEBUG: token: {token}[/]")
+    return token
+
+
+def token_to_context(ctx: click.Context, _param: click.Parameter, value: str) -> None:
+    ctx.obj["token"] = value
+
+
+def github_server_to_context(
+    ctx: click.Context,
+    _param: click.Parameter,
+    value: str,
+) -> None:
+    ctx.obj["github_server"] = value
+
+
 stack = click_default_group.DefaultGroup(
     "stack",
     default="push",
     default_if_no_args=True,
     help="Manage pull requests stack",
+    params=[
+        click.Option(
+            param_decls=["--token"],
+            default=lambda: asyncio.run(get_default_token()),
+            help="GitHub personal access token",
+            callback=token_to_context,
+        ),
+        click.Option(
+            param_decls=["--github-server"],
+            default=lambda: asyncio.run(get_default_github_server()),
+            help="GitHub API server",
+            callback=github_server_to_context,
+        ),
+    ],
 )