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feat: race countdown support and language version selection (#346)

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## Problem

Two gaps in the plugin: (1) contest pickers have no way to know whether
a contest supports countdown (race), so the UI can't surface that
affordance; (2) `:CP submit` hardcodes a single language ID per platform
with no way to choose C++ standard or override the platform ID.

## Solution

**Race countdown** (`4e709c8`): Add `supports_countdown` boolean to
`ContestListResult` and wire it through CSES/USACO scrapers, cache, race
module, and pickers.

**Language version selection** (`b90ac67`): Add `LANGUAGE_VERSIONS` and
`DEFAULT_VERSIONS` tables in `constants.lua`. Config gains `version` and
`submit_id` fields validated at setup time. `submit.lua` resolves the
effective config to a platform ID (priority: `submit_id` > `version` >
default). Helpdocs add `*cp-submit-language*` section. Tests cover
`LANGUAGE_IDS` completeness.
This commit is contained in:
Barrett Ruth 2026-03-06 18:18:21 -05:00 • committed by GitHub
parent 592f977296
commit 58b6840815
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13 changed files with 265 additions and 46 deletions
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6
lua/cp/pickers/init.lua
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@ -48,8 +48,10 @@ function M.get_platform_contests(platform, refresh)
{ level = vim.log.levels.INFO, override = true, sync = true }
)
local contests = scraper.scrape_contest_list(platform)
cache.set_contest_summaries(platform, contests)
local result = scraper.scrape_contest_list(platform)
local contests = result and result.contests or {}
local sc = result and result.supports_countdown
cache.set_contest_summaries(platform, contests, { supports_countdown = sc })
picker_contests = cache.get_contest_summaries(platform)
logger.log(