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Name the closure's own context where the framework now demands one

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Stage 4 of decision 0023, finished. The dependency swap itself compiled the
whole closure on the first attempt; what did not compile was `apps/lumbridge`,
and the entire API delta across a ten-month jump turned out to be three
signatures over 19 call sites.

`Window::focus` is now `focus(&mut self, handle: &FocusHandle, cx: &mut App)`
-- 16 sites. `flex_shrink()` takes the factor it used to assume, so it is
`flex_shrink(1.0)` -- 2 sites. `Application::new()` is gone with the rest of
the entry point, and is `gpui_platform::application()` -- 1 site. That is all
of it. Nothing else in the framework's surface moved under this product in ten
months.

The interesting failure was in the fix, not the framework. Adding `, cx` to
every `window.focus` site is right in a method that owns a `cx` parameter and
wrong inside `cx.listener(...)`, whose closure is handed its own context as a
fourth argument that this code discarded as `_`. One such site capturing the
outer `cx` produced 35 errors -- E0596, two E0521s, an E0500, thirty E0501s and
two E0524s -- none of which named the actual mistake, and all of which vanished
when the discarded parameter was given the name it should have had. Worth
recording: a borrow-checker avalanche after a dependency bump is far more
likely to be one wrong capture than a framework that changed its ownership
model.

No crate outside `apps/lumbridge` needed a single change, because none of them
imports a gpui type. That boundary was not designed for this and paid for
itself anyway.

`scripts/workspace-guard.sh` now asserts what it exists to assert. It compared
`gpui` against version 0.2.2 from the crates.io registry, which after the swap
was a guard that would have failed on the correct state of the tree. It now
checks that `gpui` and `gpui_platform` both carry
git+https://github.com/zed-industries/zed.git at rev ce48461e -- the same rev,
because the pair are one framework snapshot and a disagreement between them
would compile against two. Their versions (0.2.2 and 0.1.0) are deliberately
not asserted; neither has been bumped upstream in ten months and neither means
anything. Both failure modes were induced before being trusted: a wrong
expected rev fails on both packages, and a lockfile where only gpui_platform's
rev is altered fails on that package alone.

One thing to fix next, not here: `cargo deny check sources` now fails. Decision
0023 predicted the move would bring two Git sources; the resolved graph brings
four. wasm_thread (via gpui_web and scheduler) and xim-rs, which supplies
zed-xim, xim-ctext and xim-parser to gpui_linux, are both unallowed, and
zed-industries/scap is in the lockfile too. deny.toml is named in AGENTS.md as
a file a decision record governs, so it is left alone and reported rather than
edited underneath this commit.

The UI gate is green: workspace-guard, fmt, clippy with -D warnings over
--all-targets --all-features, and 79 tests passing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SPYebLiN2w4TqnHUYGdECq
This commit is contained in:
Metal Agent
2026-09-01 13:22:50 -07:00
co-authored by Claude Opus 5
parent 378e3eb0eb
commit 3cb5e1002c
5 changed files with 1683 additions and 1677 deletions
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scripts/workspace-guard.sh
+28 -16
View File
@@ -49,30 +49,42 @@ done < <(find apps crates tools -mindepth 2 -maxdepth 2 -name Cargo.toml 2>/dev/
#
# Checked against Cargo.lock rather than the manifest, because the manifest
# states an intent and the lockfile states what would actually be compiled --
# and a caret requirement in the manifest silently accepts a version nobody
# and a manifest `rev` can drift from the revision that was actually resolved,
# just as the caret requirement it replaced silently accepted a version nobody
# decided on. Asserted in the fast headless job so it gates every push, and not
# in the UI job, which is `continue-on-error` and therefore cannot fail one.
#
# Changing this line means writing a decision record. See AGENTS.md,
# Decision 0023 moved this from published crates.io 0.2.2 to a full-SHA
# revision of Zed. Two packages arrive from it, and they must arrive from the
# SAME revision: `gpui` is the framework, `gpui_platform` is the entry point and
# the Linux backends that the publishable crate no longer contains. A pair that
# disagreed would compile against two different framework snapshots. Their
# `version` fields differ (0.2.2 and 0.1.0) and mean nothing here -- neither has
# been bumped upstream in ten months -- so the revision is what is asserted.
#
# Changing these lines means writing a decision record. See AGENTS.md,
# "Dependencies that are not an agent's decision".
expected_gpui_source='registry+https://github.com/rust-lang/crates.io-index'
expected_gpui_version='0.2.2'
expected_gpui_git='https://github.com/zed-industries/zed.git'
expected_gpui_rev='ce48461eaadd16c65c31f835511ab96bd3b6e746'
expected_gpui_source="git+$expected_gpui_git?rev=$expected_gpui_rev#$expected_gpui_rev"
gpui_block="$(awk '/^name = "gpui"$/{found=1} found{print} found&&/^$/{exit}' Cargo.lock)"
if [ -z "$gpui_block" ]; then
echo "workspace-guard: no gpui package in Cargo.lock; the shell cannot build." >&2
status=1
else
actual_version="$(printf '%s' "$gpui_block" | sed -n 's/^version = "\(.*\)"$/\1/p')"
actual_source="$(printf '%s' "$gpui_block" | sed -n 's/^source = "\(.*\)"$/\1/p')"
if [ "$actual_version" != "$expected_gpui_version" ] || [ "$actual_source" != "$expected_gpui_source" ]; then
echo "workspace-guard: the gpui dependency is not the one the decision record chose." >&2
echo " expected $expected_gpui_version from $expected_gpui_source" >&2
echo " found $actual_version from $actual_source" >&2
for pkg in gpui gpui_platform; do
block="$(awk -v pkg="$pkg" '$0 == "name = \"" pkg "\""{found=1} found{print} found&&/^$/{exit}' Cargo.lock)"
if [ -z "$block" ]; then
echo "workspace-guard: no $pkg package in Cargo.lock; the shell cannot build." >&2
status=1
continue
fi
actual_source="$(printf '%s' "$block" | sed -n 's/^source = "\(.*\)"$/\1/p')"
if [ "$actual_source" != "$expected_gpui_source" ]; then
echo "workspace-guard: the $pkg dependency is not the one the decision record chose." >&2
echo " expected $expected_gpui_source" >&2
echo " found ${actual_source:-<no source: a path or workspace override>}" >&2
echo " Both gpui crates must carry rev $expected_gpui_rev." >&2
echo " A bump is a decision record, not a commit. See AGENTS.md." >&2
status=1
fi
fi
done
if [ "$status" = 0 ]; then
echo "workspace-guard: crate membership and the pinned UI dependency are as recorded."