* feat(#323): fish-shell support in post-install PATH suggestion
Two additive changes to the post-install PATH-suggestion seam, both scoped
to existing functions.
A. Projection: add a fish entry to the persist-mode shell-action list in
projectPathActionProjection() (src/shell-command-projection.cts). fish has
no `export`/`$PATH`-list syntax, so the existing zsh/bash `export PATH=...`
commands are inert when pasted. The new entry emits the fish-native
`fish_add_path '<dir>'` (fish 3.2+, persists via the universal-variable
store, de-duplicating). The directory is single-quoted with the same POSIX
literal escaping as the zsh/bash siblings; verified round-tripping through
real fish 3.7.0 for paths containing quotes, spaces, `$`, `*`, backticks
and unicode.
B. Detection: add homePathCoveredByFishConfig() in bin/install.js, called
from maybeSuggestPathExport() alongside homePathCoveredByRc(). fish does
not use sh-style `export PATH=` rc files, so a fish user whose
fish_user_paths already covers the global bin would otherwise get a
false-positive "not on your PATH" warning on every install. Two
side-effect-free detection routes (no fish subprocess):
1. The universal-variable store (~/.config/fish/fish_variables). fish
serializes this with `full_escape`: every byte outside [A-Za-z0-9/_]
becomes `\xHH` (space -> \x20, `-` -> \x2d, `.` -> \x2e, `$` -> \x24,
unicode -> \uXXXX) and list elements are joined by the literal 4-char
token `\x1e` (NOT a raw 0x1e byte). The detector splits on `\x1e`,
decodes the escapes, then compares each as an absolute literal — a
decoded `$` is part of the directory name, not an unexpanded variable.
Verified against real fish 3.7.0 output.
2. config.fish (`fish_add_path`, `set -gx PATH`, `set -Ux fish_user_paths`)
— plain shell tokens: HOME forms ($HOME/${HOME}/~) are expanded and a
token still holding `$` (e.g. `$PATH`, `$fish_user_paths`) is skipped.
Honours $XDG_CONFIG_HOME and always also checks ~/.config/fish.
No behaviour change for bash/zsh/PowerShell/cmd/Git-Bash users: their entries
and command strings are unchanged; the fish entry is additive and the fish
detector only narrows the set of cases that warn.
Tests: update the projection length assertion (2 -> 3) and fish escaping in
bug-3441; add fish detection + suppression cases in install-path-detection
(uvar store with real fish escaping, dot/hyphen/space/$-literal decode
regressions, config.fish routes, commented-out, relative-segment guard,
unreadable-file fault injection, suppression and emission via
maybeSuggestPathExport).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* chore(changeset): add Changed fragment for #323 fish PATH support (#727)
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* fix(#323): address review — action-only fish docs, decoder property test, win32 guard
Addresses @trek-e's review on #727:
- docs (blocker): keep the how-to action-only (Diátaxis). Drop the
`# fish — persists via …` comment and the internal-mechanism clause
naming fish_variables/config.fish; leave one command + the exec-fish
directive.
- tests (minor): extract decodeFishUniversalValue to a pure, exported
module function and add fast-check round-trip properties
(decode(fishEscape(p)) === p over arbitrary unicode, abs-path variant,
totality). Consolidated into install-path-detection.test.cjs to respect
the install test-file-count ratchet.
- tests (follow-up): port #721's win32 negative-projection test (no fish
action on win32; persist projection is PowerShell/cmd.exe/Git Bash).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* fix(#323): address review — drop unused 'after' import, clarify escaping comment
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Co-authored-by: Tom Boucher <trekkie@nomorestars.com>
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