Automate interactive add asciicast generation - #1395
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dfetch.terminal.is_tty (and the copies imported by value into dfetch.terminal.prompt/screen) don't see a patch on dfetch.terminal.keys.is_tty, since "from .keys import is_tty" binds a separate name at import time. Under asciinema's real pty this left is_tty() returning True, so the wizard opened the raw-terminal tree browser/ghost prompts instead of the mocked rich prompts, stalling on real keypresses. Patch sys.stdin.isatty() instead, which every is_tty() copy reads from directly. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
dfetch add -i's tree browser and ghost-text prompts read raw keypresses directly from the terminal (documented in adding-a-project.rst and shown in the current interactive-add.cast), so there is nothing at the Python level to mock -- the previous is_tty patch could only force a different, undocumented plain-text fallback UI instead. Spawn dfetch inside its own pty via pexpect and feed it the same choices already shown in the current cast (pick tag v3.4, keep the whole repo as src, ignore examples/ and tests/), draining and mirroring the pty's output continuously so the recorded timing looks the way a human driving it would. Verified end to end: the resulting dfetch.yaml matches the current cast's byte for byte, with zero human input. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
The original human-driven recording paused ~1.3-1.4s before accepting a default, ~0.15-1.1s between tree navigation steps, and ~2.3s while reading the source-path tree before accepting the repo root. Widen the helper's delays to match that cadence instead of the much brisker defaults used for the first automated pass. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
Recorded with asciinema + agg for the PR description: before.gif shows the previous helper stalling on the wizard's first prompt (waiting on a human keystroke that a scripted recording never provides), after.gif shows the current pty-driven helper completing the whole wizard unattended. Not meant as permanent documentation assets. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
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WalkthroughThe cast helper now launches ChangesCast automation
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The PR changes local cast-generation automation, but fixed tree offsets can select the wrong tag or ignore paths for repositories with different tree ordering, and the documented installation command fails when run from doc/generate-casts. These are bounded workflow correctness issues, so the PR is mergeable with explicit owner follow-up. Sequence Diagram(s)sequenceDiagram
participant interactive_add_helper.py
participant dfetch_add_interactive
participant Terminal
interactive_add_helper.py->>dfetch_add_interactive: Spawn in a real pty
dfetch_add_interactive-->>interactive_add_helper.py: Emit wizard output
interactive_add_helper.py->>Terminal: Mirror output
interactive_add_helper.py->>dfetch_add_interactive: Send recorded keypresses
dfetch_add_interactive-->>interactive_add_helper.py: Complete with exit status
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Full details: Docstring CoverageExplanation Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 1 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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In `@doc/generate-casts/interactive_add_helper.py`:
- Around line 46-88: Update the docstrings for _terminal_size, _pump, _press,
_navigate, and _drive_wizard to follow Google-style conventions: document
_terminal_size’s tuple result in a Returns: section, and add Args: sections
describing each parameter for the other four helpers, including _drive_wizard’s
child argument.
- Around line 95-107: Validate the interactive tree selections before confirming
them in the helper using child and the _navigate/_press flow. Replace fixed
cursor offsets with label-based selection where possible, or verify the tree
contains the expected v3.4, examples/, and tests/ entries and reject otherwise
before writing dfetch.yaml.
In `@doc/generate-casts/README.md`:
- Around line 9-11: Update the setup command in the README to install the casts
extra from the repository root while running in doc/generate-casts, using the
correct relative editable-install path and retaining the existing script usage
context.
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Rename interactive_add_helper.py to interactive_helper.py and take the dfetch subcommand/args on the command line instead of hardcoding 'add --interactive <url>', so recordings for other interactive commands can reuse the same pty-driving machinery later. Extract the add -i scripted keystrokes into an explicit INTERACTIVE_ADD_KEYSTROKES list of (expect-pattern, keys, delay) entries, looked up by subcommand, replacing the inline _drive_wizard control flow. This keeps the generic pty/expect/pump plumbing separate from the per-command timing/keys, so either can be tuned independently. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
interactive_helper.py no longer knows anything about 'add' specifically:
INTERACTIVE_ADD_KEYSTROKES and its subcommand lookup table are gone, and
the script now reads a small keystroke DSL from stdin instead --
[WAIT "<regex>"] SEND <keys> DELAY <seconds> [REPEAT <count>]
interactive-add-demo.sh now owns the actual choices (accept the
default name/destination, pick tag v3.4, ignore examples/ and tests/)
as a heredoc piped into the helper, so a future interactive command's
demo script can reuse the same generic pty-driving machinery with its
own keystroke script, without touching interactive_helper.py at all.
Verified end to end: both the piped-helper invocation and the full
interactive-add-demo.sh (via demo-magic) still produce the same
dfetch.yaml as before.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
- Guard the version/ignore tree confirmations with a WAIT on the actually highlighted entry (v3.4, examples, tests) before sending Enter/Space. The demo script picks these by a fixed count of Down-presses, which would otherwise silently lock in the wrong tag or ignore path if cpputest's upstream branch/tag order ever changes -- now a mismatch times out loudly instead of writing a wrong dfetch.yaml. Verified both that the happy path is unaffected and that a deliberately wrong expectation (v9.9) does time out rather than proceeding. - Clarify in the README that `pip install -e .[casts]` is run from the repository root, not from doc/generate-casts where the README lives. - Add Args/Returns sections to interactive_helper.py's docstrings. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018L8LELgMvNRvxVPWGGhzFC
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Summary
doc/generate-casts/interactive_add_helper.py(used bygenerate-casts.shto recorddoc/asciicasts/interactive-add.cast) was supposed to drivedfetch add -ifully unattended, but a human still had to sit at the keyboard:dfetch.terminal.keys.is_tty, butdfetch/terminal/__init__.py,prompt.py, andscreen.pyeach dofrom .keys import is_tty— a value copy, not a live reference — so the patch never reached theterminal.is_tty()calladd.pyactually uses.asciinema rec's real pty,is_tty()still returnedTrue, so the wizard opened its real tree-browser/ghost-prompt UI, which reads raw keypresses straight from the terminal — the exact UI documented indoc/howto/adding-a-project.rstand shown in the currentdoc/asciicasts/interactive-add.cast. That UI has nothing to mock at the Python level; a human had to actually press the keys.Changes
interactive_add_helper.pyto spawndfetch add --interactive <url>inside its own pty viapexpect, then feed it the same choices the current cast shows: accept the default name/destination, pick tagv3.4in the version tree, accept the whole repo assrc, and use the ignore tree to excludeexamples/andtests/. The inner pty's output is continuously drained and mirrored to stdout in real time, so pacing stays faithful when this script itself runs underasciinema rec -c._PRE_DELAY,_STEP_DELAY,_CONFIRM_DELAY,_READ_DELAY) to match the original human-driven recording's cadence (~1.3s before accepting a default, ~0.35s between tree steps, ~1.8s while "reading" the source-path tree).pexpectto thecastsextra inpyproject.tomland documented the new requirement indoc/generate-casts/README.md.Verified end to end (see gifs below): the resulting
dfetch.yamlmatches the current committed cast's content byte for byte —tag: v3.4,ignore: [examples, tests], nodst:— with zero human input.Before / after
Before — the wizard opens and then just sits there, waiting for a keystroke that a scripted
asciinema recnever provides:After — the same wizard runs to completion unattended, picking the tag and ignore paths through the real tree-browser UI:
(
doc/generate-casts/pr-demo/*.gifare throwaway demo assets for this PR description, not permanent documentation — happy to drop them from history after review if preferred.)Test plan
cpputestrepo withstdinredirected from/dev/null; it completed with no human inputdfetch.yamlmatches the currentdoc/asciicasts/interactive-add.cast's content (tagv3.4,ignore: [examples, tests], nodst:)black --checkpasses on the changed file./generate-casts.shrun to regenerate the actualdoc/asciicasts/interactive-add.cast(not run here; asciinema/pexpect aren't part of the sandbox this PR was authored in beyond ad hoc verification)Generated by Claude Code
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Documentation
castsoption.Chores