feat(rust): port freeze create/update/delete to native Rust

[jd]

Round-trip the three remaining freeze mutations:

• freeze create — POST /v1/repos/<r>/scheduled_freeze with
  the Python CreateScheduledFreezePayload shape: start/end
  always present (null for open-ended emergency freezes),
  matching_conditions/exclude_conditions keys omitted when
  the user passed no -c/-e flags. When --timezone is left
  off, falls back to iana-time-zone::get_timezone() — same
  role as Python's tzlocal.get_localzone_name().
• freeze update — PATCH /v1/repos/<r>/scheduled_freeze/<id>
  with skip-if-none on every field so PATCH semantics work
  correctly: a flag the user didn't pass doesn't touch the
  stored field.
• freeze delete — POST /v1/repos/<r>/scheduled_freeze/<id>/delete
  with delete_reason in the body only when supplied (the API
  requires it for active freezes; the CLI lets the server
  reject a missing reason rather than pre-validating).

Adds Client::patch on the core HTTP client, a shared
mergify-freeze::common module (wire-format struct, naive-DT
parser, system-timezone detection, per-freeze human printer
used by create and update), and iana-time-zone as a new
dependency. The Python implementation of each command is left
in place but no longer reachable via the binary, since clap now
dispatches the whole freeze group natively.

Co-Authored-By: Claude Opus 4.7 noreply@anthropic.com

[jd]

This pull request is part of a Mergify stack:

#	Pull Request	Link
1	feat(rust): port freeze create/update/delete to native Rust	#1437	👈
2	refactor(rust): dedupe emit-helper boilerplate across command crates	#1438
3	refactor(rust): share test scaffolding via mergify-test-support crate	#1439
4	refactor(core): introduce CommandContext for the queue+freeze prelude	#1441
5	refactor(ci): consolidate the CI-env scrubber into a shared testing module	#1442
6	refactor: drop stale Phase X.Y doc markers and one inline color branch	#1443
7	refactor(tui): share StyledGlyph across queue show/status renderers	#1444
8	refactor(queue): drop indexmap, group_by_scope returns a Vec<(K, V)>	#1445
9	refactor(ci): swap uuid for getrandom in the GHA heredoc delimiter	#1446
10	refactor(config): standardize the workspace on serde_yaml_ng for YAML parsing	#1447

[mergify]

Merge Protections

Your pull request matches the following merge protections and will not be merged until they are valid.

🟢 🤖 Continuous Integration

Wonderful, this rule succeeded.

• all of:
  • check-success=ci-gate

🟢 👀 Review Requirements

Wonderful, this rule succeeded.

• any of:
  • #approved-reviews-by>=2
  • author = dependabot[bot]
  • author = mergify-ci-bot
  • author = renovate[bot]

🟢 Enforce conventional commit

Wonderful, this rule succeeded.

Make sure that we follow https://www.conventionalcommits.org/en/v1.0.0/

• title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert|ui)(?:\(.+\))?:

🟢 🔎 Reviews

Wonderful, this rule succeeded.

• #changes-requested-reviews-by = 0
• #review-requested = 0
• #review-threads-unresolved = 0

🟢 📕 PR description

Wonderful, this rule succeeded.

• body ~= (?ms:.{48,})

[jd]

Revision history

#	Type	Changes	Reason	Date
1	initial	be2b24a		2026-05-19 08:56 UTC
2	rebase	be2b24a → f0eb260 (rebase only)		2026-05-19 08:56 UTC
3	content	f0eb260 → 56f3cf1 (raw)		2026-05-19 12:06 UTC
4	rebase	56f3cf1 → 50fcb0d (rebase only)		2026-05-19 13:04 UTC
5	rebase	50fcb0d → f322a06 (rebase only)		2026-05-19 14:15 UTC
6	rebase	f322a06 → 7aefa73 (rebase only)		2026-05-20 08:42 UTC
7	rebase	7aefa73 → 622f895 (rebase only)		2026-05-20 09:05 UTC
8	rebase	622f895 → 032f043 (rebase only)		2026-05-21 07:25 UTC
9	content	032f043 → fcc43ed		2026-05-21 07:56 UTC
10	rebase	fcc43ed → a2bd0dd (rebase only)		2026-05-21 12:39 UTC
11	content	a2bd0dd → 659f960		2026-05-22 07:10 UTC
12	content	659f960 → 9f504f7 (raw)		2026-05-22 14:40 UTC

[mergify]

@jd this pull request is now in conflict 😩

[Copilot]

Pull request overview

Ports the remaining mergify freeze mutations (create, update, delete) from the Python implementation to native Rust, aligning wire formats and human output with the existing CLI behavior while extending the core HTTP client with a PATCH verb.

Changes:

• Add native Rust implementations for freeze create/update/delete plus a shared common module for wire structs, datetime parsing, timezone detection, and human formatting.
• Extend mergify-core HTTP client with Client::patch and route freeze subcommands through Rust clap dispatch (no Python fallback).
• Add iana-time-zone (timezone detection) and a direct chrono dependency to mergify-cli for typed datetime CLI args.

Reviewed changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
crates/mergify-freeze/src/create.rs	Implements freeze create POST payload + human output and wiremock tests.
crates/mergify-freeze/src/update.rs	Implements freeze update PATCH payload with optional fields + tests for omitted fields.
crates/mergify-freeze/src/delete.rs	Implements freeze delete POST-to-/delete semantics + tests for optional reason body.
crates/mergify-freeze/src/common.rs	Introduces shared wire struct, datetime parsing, timezone detection, and freeze pretty-printer.
crates/mergify-freeze/src/list.rs	Refactors list rendering to reuse common helpers/structs.
crates/mergify-freeze/src/lib.rs	Exposes new freeze subcommand modules and shared common.
crates/mergify-freeze/Cargo.toml	Adds iana-time-zone dependency for system timezone detection.
crates/mergify-core/src/http.rs	Adds Client::patch + unit test coverage.
crates/mergify-cli/src/main.rs	Wires freeze create/update/delete into native dispatch and adds clap parsing for new args.
crates/mergify-cli/Cargo.toml	Adds direct chrono dependency for clap-parsed NaiveDateTime.
Cargo.lock	Locks new dependencies (chrono for cli, iana-time-zone for freeze).

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-05-26 07:19 UTC · Rule: default
• ✅ Checks skipped · PR is already up-to-date
• ✅ Merged — 2026-05-26 07:19 UTC · at 9f504f7dbecdd932f35d69118bbae1cb65e710b8 · squash

This pull request spent 17 seconds in the queue, including 3 seconds running CI.

Required conditions to merge

• all of [🛡 Merge Protections rule Enforce conventional commit]:
  • title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert|ui)(?:\(.+\))?:
    • feat(rust): port freeze create/update/delete to native Rust #1437
• all of [🛡 Merge Protections rule 👀 Review Requirements]:
  • any of:
    • #approved-reviews-by>=2
      • feat(rust): port freeze create/update/delete to native Rust #1437
    • author = dependabot[bot]
      • feat(rust): port freeze create/update/delete to native Rust #1437
    • author = mergify-ci-bot
      • feat(rust): port freeze create/update/delete to native Rust #1437
    • author = renovate[bot]
      • feat(rust): port freeze create/update/delete to native Rust #1437
• all of [🛡 Merge Protections rule 📕 PR description]:
  • body ~= (?ms:.{48,})
    • feat(rust): port freeze create/update/delete to native Rust #1437
• all of [🛡 Merge Protections rule 🔎 Reviews]:
  • #changes-requested-reviews-by = 0
    • feat(rust): port freeze create/update/delete to native Rust #1437
  • #review-requested = 0
    • feat(rust): port freeze create/update/delete to native Rust #1437
  • #review-threads-unresolved = 0
    • feat(rust): port freeze create/update/delete to native Rust #1437
• all of [🛡 Merge Protections rule 🤖 Continuous Integration]:
  • all of:
    • check-success=ci-gate