feat(rust): port ci scopes-send to native Rust (Phase 1.4)

[jd]

First ci command to go native. Straight HTTP POST to Mergify
carrying the scopes detected for a pull request, no new
infrastructure needed beyond what the config pilot already
established.

What ports natively

mergify ci scopes-send [-r REPO] [-p NUMBER] [-t TOKEN] [-u URL] [-s SCOPE...] [--scopes-json FILE] [--scopes-file FILE]:

1. Resolves the repository: --repository flag → GITHUB_REPOSITORY
   env → error.
2. Resolves the pull-request number: --pull-request flag →
   GITHUB_EVENT_PATH JSON (.pull_request.number) → None.
   When None the command prints a skip message to stderr and
   returns 0 — matches Python's "no PR, nothing to send".
3. Resolves the token: --token flag → MERGIFY_TOKEN →
   GITHUB_TOKEN → error.
4. Resolves the API URL: --api-url flag → MERGIFY_API_URL →
   https://api.mergify.com.
5. Collects scopes from up to three sources (combined in order):
   --scope repeated flags, --scopes-json (Pydantic
   DetectedScope dump), --scopes-file (plain text).
6. POSTs {"scopes": [...]} to
   /v1/repos/<repo>/pulls/<number>/scopes via the HTTP client.

--file is a hidden deprecated alias for --scopes-json.
When used, the command prints a deprecation warning to stderr
and proceeds — matches Python's click.echo(..., err=True).

Layout

New mergify-ci crate under crates/. The scopes_send
module is self-contained (duplicates resolve_token /
resolve_api_url from mergify-config::simulate for now —
they factor into mergify-core in a follow-up refactor PR
once another command needs them).

The binary's dispatch gains a Ci subcommand group, with
scopes-send as its only native variant today. Everything else
under ci (git-refs, scopes, scopes-send siblings)
still falls through to the Python shim. The native-intent
heuristic in detect_native now recognizes both the config
and ci prefixes.

Tests

11 new unit tests in mergify-ci::scopes_send:

• Repository resolution: flag, env fallback, error
• Pull-request resolution: explicit, from event JSON, missing
• JSON file parsing (DetectedScope shape)
• Text file parsing (trims + strips blanks)
• End-to-end wiremock: combined scopes from all three sources
• End-to-end wiremock: deprecated --file emits warning
• End-to-end wiremock: skip-on-no-PR early-out

PORT_STATUS.toml flips ci scopes-send from shimmed to
native. The port-guard test stays green.

Binary size: 8.3 MB → 8.4 MB. 51 Rust tests total.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

Depends-On: #1298

[jd]

This pull request is part of a Mergify stack:

#	Pull Request	Link
1	feat(rust): add mergify-py-shim with embedded Python fallback	#1272
2	feat(rust): add mergify-core foundation types (Phase 1.2a)	#1280
3	feat(rust): add mergify-core::http with retry + typed errors (Phase 1.2b)	#1281
4	feat(rust): port config validate to native Rust (Phase 1.3)	#1282
5	test: add port-inventory guard to catch un-ported Python commands	#1296
6	ci: add Rust release workflow targeting GitHub Release assets	#1297
7	feat(rust): port config simulate to native Rust (Phase 1.3b)	#1298
8	feat(rust): port ci scopes-send to native Rust (Phase 1.4)	#1300	👈
9	feat(rust): port queue pause and unpause to native Rust (Phase 1.5)	#1301
10	feat(rust): port ci git-refs and ci queue-info to native Rust (Phase 1.6)	#1302

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[jd]

Revision history

#	Type	Changes	Date
1	initial	86a41aa	2026-04-23 19:02 UTC
2	rebase	86a41aa → 0bbac0d	2026-04-23 19:02 UTC