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float-time was captured in the outer let* before the async fetch.
The callback used this stale value, making cache entries appear
slightly older than they are. Move the float-time call into the
callback so the timestamp reflects when the data actually arrived.
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Update copyright headers across all 37 .el files to include 2026.
Add missing Author field to testutil-wttrin.el for consistency.
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Replace TTL-based cache invalidation with proactive scheduled refresh.
Both mode-line and buffer systems now follow: timer refreshes cache,
display reads from cache, staleness indicated when data is old.
Phase 1 - Mode-line cache formalization + staleness display:
- Replace wttrin--mode-line-tooltip-data with wttrin--mode-line-cache
as (timestamp . data) cons cell matching buffer cache pattern
- Add wttrin--format-age helper for human-readable age strings
- Rewrite wttrin--mode-line-update-display to take no arguments,
read from cache, compute staleness (age > 2x refresh interval),
dim emoji gray when stale, show staleness info in tooltip
- Rewrite wttrin--mode-line-fetch-weather to write cache on success,
show stale display on failure with cache, error placeholder without
- Add wttrin--mode-line-update-placeholder-error for first-launch failure
Phase 2 - Remove TTL, add proactive buffer refresh:
- Rename wttrin-cache-ttl to wttrin-refresh-interval (default 3600s)
with define-obsolete-variable-alias for backward compatibility
- Change wttrin-mode-line-refresh-interval default from 900 to 3600
- Remove TTL check from wttrin--get-cached-or-fetch; serve cached data
regardless of age, background timer keeps it fresh
- Add buffer refresh timer (wttrin--buffer-cache-refresh)
Phase 3 - Buffer staleness display:
- Add wttrin--format-staleness-header for buffer age display
- Insert staleness line in wttrin--display-weather before instructions
Phase 4 - Cleanup:
- Remove all references to wttrin--mode-line-tooltip-data
- Update README.org cache settings and mode-line documentation
- Update tests for new API (198 tests across 21 files, all passing)
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Critical bug fix: On fresh Emacs launch, weather displayed with only
double quotes colored blue, all other text white. Pressing 'g' to
refresh brought colors back.
Root cause: wttrin-mode (derived mode) calls kill-all-local-variables
internally. The code was setting xterm-color--state buffer-local BEFORE
calling wttrin-mode, so the state was immediately wiped out. On refresh,
the mode was already active (no-op), so the state survived.
Fix: Call wttrin-mode FIRST, then set buffer-local variables after.
This ensures kill-all-local-variables runs before we set any state.
Changes:
- Reorder initialization in wttrin--display-weather (wttrin.el:277-285)
- Add regression tests for mode initialization order (2 new tests)
Test results: 65 tests, all passing
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