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…storing crates they never use The cargo cache cost every Windows and macOS row 21 to 60 seconds, most of it Windows tar unpacking 13,000 extracted crate sources, and in the runs looked at it was never read: every port came from the binary cache, so cargo never ran. The one port built with cargo, Velopack, is built only when that cache misses it, and then fetching its crates takes about ten seconds. Linux, which does not build Velopack, restored it too. vpk is a 147 MB package, and dotnet tool restore took 21 seconds of each Windows packaging job. setup-dotnet now caches the NuGet packages folder, keyed on the tool manifest, and the jobs point that folder into the workspace so the cache holds the two tools and nothing the image carries. pip stays uncached: the wheels download in under a second, and the time goes to starting pip and unpacking CMake, which a cache does not save. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…talls them pip took 10 to 14 seconds of every Windows row, and the time was not the download: the wheels came down in under a second, and the rest went to starting pip and unpacking CMake's 4,255 files. A download cache saves none of that. The tools now live in a venv in the runner's temp directory, restored whole from the Actions cache, so a row with a hit runs no pip at all. A restore costs what unpacking costs, file by file on Windows, so the venv carries no more files than it needs: no pip, since the setup's own pip installs into it, and none of CMake's documentation, which no build reads. That is 1,834 files where a plain venv holds 5,284. It is keyed on the runner, the exact interpreter it points at and the pinned requirements, and saved as soon as it is built, so a job that later fails still leaves it for the next. The venv is also the Python root. setup-python names its own interpreter in Python3_ROOT_DIR, which CMake's FindPython takes ahead of an active venv, and the tests that spawn a Python peer would have run on an interpreter without llsd. The setup's list gains sentry-cli, which the Sentry step installed for itself, and pins llsd, since a reused venv keeps whatever version it first got. The macOS packaging job takes CMake and dmgbuild the same way, CMake pinned there too. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The Python tools at their latest releases, but for Linux's CMake, which stays at the floor the Linux build holds to. Ninja, llsd and dmgbuild are current already. vcpkg hashes the CMake version into every package ABI, so Windows and macOS miss the whole binary cache once, until a protected build fills it with the 4.4.4 packages; pull requests only read it, and build every port until then. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
…port that runs cargo velopack_libc, the C API the viewer calls, is velopack's src/lib-cpp, which is not published; the velopack crate under it is. Its sources and headers now sit in indra/rust unchanged from 1.2.161, in a Cargo workspace whose lock pins every crate at the version velopack's own lock does, with only velopack itself taken from crates.io. Corrosion, a new port in the registry, imports it: a DLL on Windows, staged and installed with the viewer's other runtime DLLs, and a static library on macOS. The release build serves every configuration, as before, and only the viewer's link builds it. The port ran cargo inside vcpkg, where vcpkg's ABI hash never saw the Rust toolchain, rustup added targets from inside a port build, and every target triple came from a table the port kept, which mapped every Linux to x86-64. Corrosion takes the target from the CMake toolchain, and from CMAKE_OSX_ARCHITECTURES on a Mac, which it would otherwise not read. The build uses cargo's default release profile rather than velopack's, which optimised for size with LTO into one code unit: 16 seconds here where that took 74, now that every build tree builds it. The 36 functions it exports are the prebuilt library's. On macOS it needs only libSystem, as rustc reports, so the nine frameworks the port listed are gone, and so is the -lSystem Corrosion would add, which ld warns of as a duplicate. Rust is needed only where Velopack is, Windows and macOS: the Linux package lists drop rustup, and the macOS steps follow Homebrew's rustup, which no longer provides rustup-init and keeps its proxies off the path. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Corrosion runs cargo in every Windows and macOS build now, and fetching the crates cold takes nine seconds. They come from the Actions cache, keyed on indra/rust/Cargo.lock: the index and the .crate archives only, 330 files, since cargo unpacks the sources itself and the 8,000 unpacked files would be most of a restore on Windows. On a miss they are fetched and saved at once rather than when the job ends, as the rows that build no viewer never run cargo and finish first, and would save an empty registry under the key. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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WalkthroughThis change adds a Rust-backed Velopack C API and C++ wrapper, integrates the Rust library with CMake, and updates CI workflows to cache Rust, Python, and .NET tools. ChangesVelopack Rust Integration
Python Tool Cache and Packaging Workflows
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Refactor Sequence Diagram(s)sequenceDiagram
participant Caller as C API caller
participant CAbi as vpkc_* C ABI
participant UpdateManager as Velopack UpdateManager
Caller->>CAbi: Create manager
CAbi->>UpdateManager: Construct with update source
Caller->>CAbi: Check for updates
CAbi->>UpdateManager: Check for updates
UpdateManager-->>CAbi: Update result
CAbi-->>Caller: Status and update data
Merge Risk: ⚪ Minimal · up to The change builds the Velopack C API through Corrosion and adds cached Python tooling for CI. The previously reported buffer-termination and venv-sharing issues are addressed, and no blocking risk is evident from the review. Windows remains untested, so watch the first Windows CI run. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The viewer retains its existing check, download, and apply path; the new C++ wrapper is not used by the inspected viewer integration. No newly exploitable path was established. Equivalence of package validation and interrupted-update recovery remains unverified. Retained concerns Security review detailsSecurity Blast Radius
Trust Boundaries and Controls
Resilience and Maintainability Implications
Hardening Proposals
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 51.28% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 234 functions across 10 files. (4 skipped: 4 unsupported.)
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Inline comments:
Review comments at @indra/rust/velopack_libc/src/lib.rs:
- Around line 856-861: Add the missing Test.Squirrel-App.nuspec fixture at the
path resolved by the test setup in vpkc_new_update_manager_flow, or place it
beside the crate and update that setup to point to it. Ensure the manifest
exists at the configured ManifestPath so the update-manager flow can succeed.
Review comments at @indra/rust/velopack_libc/src/types.rs:
- Around line 98-110: Fix the off-by-one overflow consistently across the Rust
helper and its C++ callers. In return_cstr, copy at most c - 1 bytes from
s.as_bytes(), write the terminator at psz[len], and remove
CString::new(s).unwrap() to avoid panicking on interior NULs. In
throw_last_error, allocate neededSize + 1 bytes, pass that capacity, then resize
to neededSize. Apply the same allocation and resize pattern in GetCurrentVersion
and GetAppId.
Review comments at @scripts/ci/python_tools.py:
- Line 60: Update the environment path returned by the helper containing `return
temp / "python-tools"` so it is derived from the cache key, giving each
requirements set a separate virtual environment while preserving the
requirements-file path.
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.github/actions/python-tools/action.yaml.github/actions/setup-build/action.yaml.github/workflows/build.yaml.gitignoreCLAUDE.mddoc/ARCHITECTURE.mddoc/BUILD.mdindra/CMakeLists.txtindra/cmake/Dependencies.cmakeindra/cmake/Velopack.cmakeindra/rust/Cargo.tomlindra/rust/velopack_libc/Cargo.tomlindra/rust/velopack_libc/LICENSEindra/rust/velopack_libc/include/Velopack.hindra/rust/velopack_libc/include/Velopack.hppindra/rust/velopack_libc/src/csource.rsindra/rust/velopack_libc/src/lib.rsindra/rust/velopack_libc/src/raw.rsindra/rust/velopack_libc/src/statics.rsindra/rust/velopack_libc/src/types.rsindra/vcpkg-configuration.jsonindra/vcpkg.jsonscripts/ci/python_tools.pyscripts/ci/test_python_tools.py
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… the path Both Windows viewer rows failed building proc-macro2's and quote's build scripts: rustc runs link.exe by name, and the build step runs under Git Bash, whose /usr/bin, holding coreutils' link, comes first on the path. CMake's own links name the linker by its path. cargo now does the same, through CARGO_TARGET_<triple>_LINKER, which covers the build scripts too, since they are built for the target the crate is. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
return_cstr, behind vpkc_get_last_error, vpkc_get_current_version and vpkc_get_app_id, copied the string and its terminator up to the buffer's size and then wrote another terminator after them: one byte past the buffer whenever the string did not leave two bytes spare. The viewer's 512-byte error buffers overflowed on a message of 511 characters. It now copies at most size - 1 bytes and terminates inside, and no longer panics on an interior NUL. Velopack.hpp's wrappers, which passed the string's length as the size and let the stray terminator land in std::string's, give it room for one. Checked with a canary after the buffer, clobbered before and intact after, at the exact length and at one more. The viewer's version read took the whole length returned even when the version had not fit its 64 bytes; it takes what was written. The lines are marked Alchemy, and the vendored copy's notes say to keep them until velopack fixes it. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Every call of the python-tools action used one python-tools directory, so a job that asked for two lists would build the second over the first, and save the first's tools under the second's key. The venv and its requirements file are now named for the list. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Description
Faster CI setup through caches that actually get used, and Velopack's C API built in the viewer's own CMake through Corrosion instead of a vcpkg port that ran cargo. Six commits:
1. The packaging jobs cache their .NET tools, and the build rows stop restoring crates they never use
The old cargo cache cost every Windows and macOS row 21–60 s (mostly Windows
tarunpacking 13,000 extracted crate sources), and in the runs looked at it was never read: every port came from R2, so cargo never ran.vpkis a 147 MB nupkg;setup-dotnetnow caches the NuGet folder, keyed ondotnet-tools.json, pointed into the workspace so it holds only the two tools.2. The Python tools come back from the cache as a venv
pip's 10–14 s per Windows row was pip start-up and unpacking CMake's 4,255 files, not downloading. A new
python-toolsaction restores a venv whole, keyed on the runner, the exact interpreter and the pinned requirements, so a hit runs no pip. The venv has no pip and none of CMake's documentation: 1,834 files instead of 5,284. It is saved as soon as it is built. It is also made the Python root: setup-python'sPython3_ROOT_DIRwould otherwise win over the venv in FindPython, and the Python-peer tests would run withoutllsd.sentry-clijoins it; the macOS packaging job's CMake and dmgbuild use it too.3. CMake 4.4.4 on Windows and macOS, and sentry-cli 3.8.0
Every pip pin at its latest except Linux's CMake floor. vcpkg hashes the CMake version into every package ABI, so Windows and macOS miss the R2 cache once, until a protected build fills it.
4. Corrosion builds Velopack's C API from the crates.io
velopackvelopack_libc(velopack'ssrc/lib-cpp, unpublished) is vendored unchanged from 1.2.161 intoindra/rust, a Cargo workspace whose lock keeps velopack's own crate versions, withvelopackitself from crates.io.cmake/Velopack.cmakeimports it with Corrosion (new port, AlchemyViewer/alchemy-registry@c6aa624): a DLL on Windows, installed with the other runtime DLLs, a static library on macOS, the release build for every configuration, built only by the viewer's link. The Rust target comes from the toolchain, and fromCMAKE_OSX_ARCHITECTURESon a Mac, replacing the port's table (which mapped every Linux target to x86-64). Cargo's default release profile builds it in 16 s where velopack's took 74. On macOS it needs only libSystem, so the port's nine frameworks are gone. Docs: Rust is Windows/macOS only, and the macOS steps follow Homebrew's rustup, which no longer providesrustup-init.5. Windows and macOS rows restore the crates Velopack's C API builds from
Index and
.cratearchives only (330 files, 37 MB), keyed onindra/rust/Cargo.lock, fetched and saved immediately on a miss — the Tests rows never run cargo and finish first, so a save at job end would store an empty registry.Related Issues
Issue Link: none
Checklist
c6aa624)Additional Notes
Tested on macOS arm64: actionlint, the
python_toolsunit tests, both venvs built, round-tripped and run; FindPython picking the venv over a competingPython3_ROOT_DIR; the viewer configured from the pushed registry with Velopack on;llvelopack.cppcompiled against the vendored header; a program linked throughVelopack.cmakeresolving all 36vpkc_*functions (the same 36 the prebuilt 1.2.161 library exports) and running, without linker warnings.Not run anywhere yet: Windows. Worth watching on the first run:
aarch64-pc-windows-msvcwith rustup and cross-compiles, as the old port did.🤖 Generated with Claude Code