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actions/cache@v2 doesn't work on windows-2016 images, since those
contain the GNU tar, which cannot work with \ as path separator. This
was fixed in package @actions/cache v1.0.5, which is used by action
actions/cache@v2.1.4 [1][2].
In addition, it simply couldn't find tar.exe on those images thanks to
my action cleanup-path, which removed the corresponding directory (I
think it was Git's bin/) from PATH. It worked for windows-2019 images
thanks to them containing tar.exe in System32. Solved by turning
cleanup-path into a JavaScript action with a "post" step, which restores
the original PATH value.
[1]: https://github.com/actions/virtual-environments/issues/480
[2]: https://github.com/actions/toolkit/issues/632
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OK, this is epic. I was basically just trying to a) support Clang and
b) add more test coverage. _THREE MONTHS_ and a few hundred CI runs
later, this is what I came up with. I don't know how it ended up being
what it is, but here we go.
Some highlights of the changes:
1) CI builds has been moved to GitHub Actions,
2) the entire notion of a toolchain has been reworked; it now supports
Clang on all platforms.
* .github: this directory contains the GitHub Actions workflow
scripts/actions. In the process, I created like 6 external GitHub
actions, but it's still pretty massive. An upside is that it covers
much more platform/toolchain combinations _and_ check a lot of the
expected post-conditions. TODO: .ci/Makefile is obsolete now, as well
as .travis.yml and .appveyor.yml.
* common.cmake: added Clang support. In the process, a great deal has
been learned about how CMake works; in particular, static runtime
support has been reworked to be more robust.
* project: the entire notion of a "toolchain" has been reworked.
Instead of a measly --mingw parameter, there's now a separate --toolset
parameter, which allows you to choose between GCC, Clang, MSVC, etc.
Both Boost and CMake build scripts were enhanced greatly to support
Clang and other toolchains in a more robust way.
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