Nix-based support for building with MSVS on Linux.
This repo allows to build QEMU VM image with installed MSVS as a sandbox-compatible Nix derivation, in fully automatic fashion.
This repository is not meant to be used directly. Please see Coil Toolchain for Windows project for a usage example.
The script runs in two stages.
First, MSVS packages are fetched using Nix-based reimplementation of VS installer fetching logic (inspired by vsdownload.py from mstorsjo/msvc-wine). Downloaded packages are combined into "VS layout" package cache directory, as expected by VS installer.
Second, actual installation is performed, by running VS installer in VM in offline mode.
By downloading packages purely in Nix we avoid the need for online connection when running the installer, which would require the dreaded fixed-hash derivation hack, which is not possible anyway, as the resulting image is non-deterministic. Nix also allows for more granular caching, in case you try different workloads with overlapping package sets.
The fetching logic is surprisingly not very complicated. VS manifest file provides URLs and SHA256 hashes, so the script mostly just feeds those to fetchurl calls. The set of hardcoded hashes is small enough to be maintainable, see fixeds.json.
This repo is made available under MIT license, but note that it's only about the script itself. The proprietary stuff it downloads is subject to Microsoft's EULA.