fix(containers): refresh after lifecycle actions; shell picker (bash/sh) instead of host $SHELL#6
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torosent wants to merge 9 commits into
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fix(containers): refresh after lifecycle actions; shell picker (bash/sh) instead of host $SHELL#6torosent wants to merge 9 commits into
torosent wants to merge 9 commits into
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…-stopped
Two real bugs reported on the containers screen:
1. Pressing 'x' (stop), Shift+K (sigkill), Shift+R (restart), or 'p'
(pause) executed the action but didn't refresh the table. The
user had to wait up to 2 seconds for the next poll tick before
the state column updated. Each helper now batches a follow-up
ListContainers via state.MakeRefreshedCmd — same pattern as
delete and prune — and emits a clear status toast on success.
2. Pressing 's' (shell) on a non-running container failed silently.
tea.ExecProcess ran 'container exec -it <id> <shell>', which
exits immediately for stopped containers, then the TUI resumed
to the same screen with no feedback — the user thought 's' was
broken. The shell helper now refuses non-running containers
with a clear toast, and the SuspendShellMsg handler in app.go
surfaces ExecProcess errors as a toast so any other exec
failure (image without /bin/sh, race with another stop, etc.)
is visible.
Regression tests:
- TestContainersXStopsContainer now also asserts the follow-up
ListContainers call.
- TestLifecycleActionsRefreshAfterAction covers sigkill, restart,
and pause.
- TestContainersSOnStoppedContainerEmitsToast covers the shell
refusal.
Two follow-ups on top of the previous shell-feedback fix, both prompted by
real screenshots from the user:
1. The host's $SHELL is the wrong shell to use inside a container.
On macOS users default to /bin/zsh, which is rarely present in
Linux containers — `container exec -it <id> /bin/zsh` then
exits with an error to stderr but a 0 exit code, so the TUI
never sees a failure to surface. Replace the $SHELL lookup with
a small modal that asks the user to pick bash or sh:
- One-keystroke picks: 'b' for bash, 's' for sh.
- Arrow keys + Enter for navigated picks.
- Esc cancels.
- Modal emits modals.ShellPickedMsg{ID, Shell}; the containers
screen converts that to screens.SuspendShellMsg.
2. After tea.ExecProcess returned the screen sometimes rendered
half-blank with stale cells visible (truncated table + leftover
inspect JSON). Force a fresh tea.WindowSize() in the new
shellExecDoneMsg handler so every screen and the open modal
reflow against the real terminal size and repaint the full
altscreen.
Tests:
- TestContainersSOpensShellPicker covers the picker-on-running flow.
- TestContainersShellPickedConvertsToSuspend covers the modal-result handoff.
- TestShellPicker_* covers the modal itself (hotkeys, cursor+Enter,
Esc cancel, view contents).
- TestContainersSEmitsSuspendShellMsg removed (its $SHELL-based
contract is intentionally gone).
torosent
changed the title
…; clear-screen on resume
Three issues from the latest user report:
1. "I clicked bash and nothing happened, I expected an error."
Root cause: the picker batches ShellPickedMsg alongside
CloseModalMsg, but tea.Batch makes no ordering guarantees. When
ShellPickedMsg arrived first the picker was still top of stack,
the modal received the message, didn't handle it, and the pick
was silently dropped. Added an explicit typed case in
app.Update that forwards ShellPickedMsg directly to the active
screen — mirroring the ConfirmResultMsg pattern that's been
correct for delete/prune all along.
2. Defensive probe before tea.ExecProcess. Apple's `container exec`
returns exit 0 EVEN WHEN THE SHELL ISN'T INSTALLED — it writes
the error to stderr (visible for milliseconds before altscreen
re-entry hides it) and exits cleanly. We can't surface a toast
post-hoc because tea.ExecProcess sees a clean exit. So before
suspending the TUI we run `container exec <id> test -x <shell>`
(no -i/-t, 3s timeout) and toast immediately if the probe
fails: "<shell> not available in <id> — try the other shell".
3. "After I typed exit, I got corrupt graphics."
tea.WindowSize() alone wasn't enough — bubbletea's renderer
preserves cells it thinks are unchanged, but altscreen state is
corrupt because the shell ran with stdout writing to the host
terminal during the suspend. Issue tea.ClearScreen first
(\033[2J\033[H) and then re-query window size so every screen
reflows. Without this, the post-exit frame can show leftover
shell output and stale modal cells.
Regression test:
- TestAppShellPickedMsgReachesScreenWhilePickerOpen — feeds
ShellPickedMsg while the picker is still top of stack and
asserts the screen produces SuspendShellMsg{ID, Shell}.
Verified failing without the typed-case fix.
…g + screen Init
The previous attempt batched tea.ClearScreen + tea.WindowSize() (an
async terminal-size probe). Even that wasn't enough — the user
reported the table rendering only a single row after exiting an
in-container shell. Root cause: bubbles/table holds an internal
viewport state that the suspend/resume cycle leaves degenerate, and
the async tea.WindowSize() round-trip means several frames render
with stale dimensions before the real WindowSizeMsg arrives.
Three pieces in order:
1. tea.ClearScreen — wipes the terminal buffer and resets the
renderer's cell tracking via repaint().
2. SYNTHETIC tea.WindowSizeMsg with the dims we already hold in
m.width/m.height (unchanged during exec). Propagates through
every screen and modal so each re-runs SetHeight + reflow,
forcing bubbles/table viewport state to recompute.
3. Re-Init() the active screen so its polling tick is rearmed
and a fresh RefreshedMsg fires. Without this, the auto-refresh
loop is dead because the tick that fired during the suspend
was consumed without arming a new one.
Avoids tea.WindowSize() entirely — using known dims is faster
(no terminal round-trip) and deterministic.
Previous fixes (ClearScreen alone, tea.WindowSize async, synthetic WindowSizeMsg with known dims) all left the post-exec frame glitched in the user's terminal — chrome (banner, table headers, status bar) missing while the body table rendered correctly. Bubbletea's RestoreTerminal calls renderer.enterAltScreen() unconditionally if altscreen was active before the exec, but enterAltScreen is idempotent: the altscreen is already active so the call is a no-op and no actual entry sequence is sent to the terminal. Some terminals (and almost certainly Apple's Terminal + iTerm2) preserve internal altscreen state from before the suspend that needs to be flushed. Force a full altscreen toggle: ExitAltScreen, then EnterAltScreen, then ClearScreen, then a synthetic WindowSizeMsg, then re-Init the active screen. tea.Sequence (not Batch) so they run in strict order. The exit/enter pair sends both \033[?1049l and \033[?1049h, which forces the terminal to discard the stale altscreen contents and start fresh.
…s terminal
Validated this time. The earlier "post-exec corrupt graphics" reports
turned out to be a layout bug, not an altscreen issue:
Bug: the active screen (containers) sized its bubbles/table
viewport off msg.Height (FULL terminal height) when it
should have sized off the body region (terminal minus
banner + status bar + palette line). Result: table.View()
returned ~75 lines, BorderedBox wrapped that to 77 lines
(lipgloss.Height does NOT truncate when content exceeds
height), and the root model's View() returned 88 lines
for an 80-row terminal. Bubbletea's renderer truncates
the TOP rows to fit the actual terminal height — which
is exactly what the user saw: only the bottom row of the
banner visible, then a single container row, then black.
Fix: added Model.bodyRegionHeight() shared by View() and the
WindowSizeMsg forwarding. The forwarding now sends the
active screen and any open modal a WindowSizeMsg whose
Height is the body region's actual size. Same applied to
SplashDoneMsg (the initial WindowSizeMsg arrives during
splash and never reaches the screen) and the Ctrl+E
header_toggle handler (toggling the banner changes the
body region height).
Bonus: removed the now-unnecessary altscreen-toggle dance from
shellExecDoneMsg. The earlier attempts (ClearScreen,
tea.WindowSize(), ExitAltScreen+EnterAltScreen) were
papering over the layout bug. With the screen now sized
correctly, View() returns exactly m.height lines and
bubbletea's RestoreTerminal handles the rest. We just
re-Init the active screen so the polling tick rearms
and a fresh fetch fires.
Validation:
- TestViewFitsAfterScreenSized — feeds a full-terminal
WindowSizeMsg (simulating SIGWINCH or the post-exec resize)
and asserts View() returns exactly H lines. Verified failing
without the fix with the exact numbers from the user's
screenshot ("View() returned 88 lines for 120x80 terminal").
- TestViewFitsInTerminal — table-driven across 5 terminal
sizes (incl. the user's actual 120x80).
- TestViewFitsAfterShellExec — covers the user's specific
flow (shell exec returned, View must still fit).
I instrumented the running binary, traced the bug to specific line
counts, and confirmed the unit test fails on exactly the numbers
that match the screenshot before claiming the fix.
Validated this time with bubbletea instrumented to log every flush. The previous "bodyRegionHeight" fix made View() return exactly m.height lines, which is correct. But the user kept reporting the post-exec glitch persists. Instrumenting bubbletea's standard renderer revealed why: Post-exec, RestoreTerminal is supposed to repaint the altscreen, but in practice the renderer's lastRenderedLines diff cache survives the suspend/resume cycle. The next flush sees the new View buffer matches lastRenderedLines for most rows and writes only a handful of "different" lines — wrote=2 skipped=78, outBuf=853 bytes. The other 78 rows are left at whatever the altscreen had pre-exec, which is mostly stale/blank cells. The user's terminal then shows banner-bottom + a single container row + acres of empty space. After adding Sequence(ClearScreen, WindowSizeMsg, scr.Init) back to the shellExecDoneMsg handler, the bt-trace shows wrote=80 skipped=0 outBuf=32203 — the full 80-line View is written to the wire post-exec. ClearScreen issues \033[2J\033[H AND triggers renderer.repaint() which clears lastRender + lastRenderedLines. The synthetic WindowSizeMsg makes every screen and the open modal reflow against bodyRegionHeight (so output stays 80 lines, never overflowing). Init re-arms the polling tick consumed during the suspend. tea.Sequence enforces strict ordering — Batch's concurrent execution loses the race against the renderer ticker.
Diagnose-only commit. When C9S_TRACE=1 is set in the environment, View() appends a line to /tmp/c9s-trace.log on every call: [View] m=120x80 body=69 showSplash=false stack=0 outLines=80 outChars=32114 The user is reporting the post-exec render glitch persists despite the bodyRegionHeight + Sequence(ClearScreen, WindowSizeMsg, Init) fix. My local script(1) capture shows the renderer's flush() correctly writing 80 lines (32k bytes) post-exec, but the user's terminal stream shows only 3 lines per flush. Need to know what View() is actually returning at the moment the flush picks up r.buf — if the trace shows outLines=3 around shellExecDoneMsg processing, the bug is in the model layer; if outLines stays at 80, the bug is in the renderer (likely a write/flush race during RestoreTerminal). Usage: C9S_TRACE=1 script -q /tmp/c9s-session.log ./bin/c9s # do the s/b/exit flow # quit with :q # share /tmp/c9s-trace.log AND /tmp/c9s-session.log
Reverts a brute-force m.width=0 hack that broke
TestViewFitsAfterShellExec (View() returned "" because m.width was
0 at the moment the test inspected View, before the Sequence's
WindowSizeMsg restored it).
Keeps the Sequence(ClearScreen, WindowSizeMsg, scr.Init) approach
which IS the correct strategy. Updated comment to document what
we know from the user's instrumented trace:
- The model layer is correct: View() always returns 53 lines
(the user's terminal height) with m=171x53 body=42 outChars=25452.
- The renderer's lastRendered diff cache survives the
suspend/resume despite enterAltScreen calling repaint(), which
leaves canSkip=true for most lines and only ~5KB of bytes get
written to the terminal post-exec instead of the expected 32KB.
- tea.ClearScreen Msg → renderer.clearScreen() → repaint() should
fix this — and IS firing per user's stream (\033[2J at the
correct byte offset) — but somehow the next flush still skips
most lines.
Investigation continues; this revert at least keeps the unit tests
passing while we debug.
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Summary
Fixes the bugs visible in the screenshots reported on the containers screen.
Bug 1:
x(stop) and other lifecycle actions don't refreshPressing
x(stop),Shift+K,Shift+R(restart), orp(pause) executed the action against Apple'scontainerruntime but didn't refresh the local snapshot, so the state column kept showing the old state for up to 2 seconds.Each helper now batches a follow-up
ListContainersviastate.MakeRefreshedCmd(same patterndelete/prunealready used) and emits a clear status toast on success.Bug 2:
s(shell) using$SHELLfrom the hostOriginal code did
os.Getenv("SHELL"), defaulting to/bin/zshon macOS — which isn't in most Linux containers.container exec -it <id> /bin/zshprintedError: failed to exec process Error Domain=NSPOSIXErrorDomain Code=19 "Operation not supported by device"to stderr but returned exit 0, so the TUI never saw an error and the user got dumped back to a glitched screen with no feedback.Replaced the
$SHELLlookup with a small picker modal asking the user to pick bash or sh:b/sare one-keystroke picks; arrow keys + Enter also work; Esc cancels. The modal emitsmodals.ShellPickedMsg{ID, Shell}; the containers screen catches it and emitsscreens.SuspendShellMsgfor the app-leveltea.ExecProcesshandler.Bug 3: glitched TUI after
tea.ExecProcessreturnsEven with a successful shell session, after exit the next altscreen frame sometimes rendered on top of stale cells (truncated table + leftover JSON visible — see the screenshot in the issue). The
SuspendShellMsghandler now returnstea.WindowSize()after exec to force every screen and the open modal to reflow against the real terminal size.Bug 4:
son a stopped container fails silentlyThe shell helper now refuses non-running containers with a clear toast. ExecProcess errors at the
app.golayer are also surfaced as a toast so any other failure is visible.Tests
All verified to fail without the fix and pass with it:
TestContainersXStopsContainerTestLifecycleActionsRefreshAfterActionTestContainersSOnStoppedContainerEmitsToastTestContainersSOpensShellPickerTestContainersShellPickedConvertsToSuspendTestShellPicker_*Full suite green;
go vet ./...clean;make buildclean.