error downloading doctest: "Couldn't resolve host name"

[Petross404]

Hi there, I found out lexy and I wanted to try it. For this to happen I wrote an ebuild for my Gentoo system but configuration fails with this error:

 Emerging (1 of 1) dev-util/lexy-9999::testing
 * dev-util/lexy will not be compiled with PGO.
>>> Unpacking source...
Initialized empty Git repository in /mnt/distfiles/git3-src/foonathan_lexy.git/
 * Repository id: foonathan_lexy.git
 * To override fetched repository properties, use:
 *   EGIT_OVERRIDE_REPO_FOONATHAN_LEXY
 *   EGIT_OVERRIDE_BRANCH_FOONATHAN_LEXY
 *   EGIT_OVERRIDE_COMMIT_FOONATHAN_LEXY
 *   EGIT_OVERRIDE_COMMIT_DATE_FOONATHAN_LEXY
 * 
 * Fetching https://github.com/foonathan/lexy.git ...
git fetch https://github.com/foonathan/lexy.git +HEAD:refs/git-r3/HEAD
remote: Enumerating objects: 374, done.
remote: Counting objects: 100% (374/374), done.
remote: Compressing objects: 100% (200/200), done.
remote: Total 2953 (delta 187), reused 292 (delta 143), pack-reused 2579
Receiving objects: 100% (2953/2953), 574.83 KiB | 900.00 KiB/s, done.
Resolving deltas: 100% (2004/2004), done.
From https://github.com/foonathan/lexy
 * [new ref]                    -> refs/git-r3/HEAD
git symbolic-ref refs/git-r3/dev-util/lexy/0/__main__ refs/git-r3/HEAD
 * Checking out https://github.com/foonathan/lexy.git to /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999 ...
git checkout --quiet refs/git-r3/HEAD
GIT NEW branch -->
   repository:               https://github.com/foonathan/lexy.git
   at the commit:            3003acc03fd3ae5c2830de4de20c6da09ab32054
>>> Source unpacked in /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work
>>> Preparing source in /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999 ...
>>> Source prepared.
>>> Configuring source in /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999 ...
>>> Working in BUILD_DIR: "/mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999_build"
cmake -C /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999_build/gentoo_common_config.cmake -G Ninja -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Gentoo -DCMAKE_TOOLCHAIN_FILE=/mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999_build/gentoo_toolchain.cmake  /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999
loading initial cache file /mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999_build/gentoo_common_config.cmake
-- The CXX compiler identification is GNU 10.2.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/x86_64-pc-linux-gnu-g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Error at tests/CMakeLists.txt:19 (message):
  error downloading doctest: "Couldn't resolve host name"Could not resolve
  host: raw.githubusercontent.com

  Closing connection 0



-- Configuring incomplete, errors occurred!
See also "/mnt/Volume_3/Gentoo/temp/portage/dev-util/lexy-9999/work/lexy-9999_build/CMakeFiles/CMakeOutput.log".
 * ERROR: dev-util/lexy-9999::testing failed (configure phase):
 *   cmake failed
 * 
 * Call stack:
 *     ebuild.sh, line  125:  Called src_configure
 *   environment, line 2770:  Called cmake-utils_src_configure
 *   environment, line 1188:  Called die
 * The specific snippet of code:
 *       "${CMAKE_BINARY}" "${cmakeargs[@]}" "${CMAKE_USE_DIR}" || die "cmake failed";

When I clone and build manually lexy there is no problem. Any pointer on what I am looking to fix?
Thank you!

[foonathan]

As a quick workaround, you can manually download doctest.h (from https://raw.githubusercontent.com/onqtam/doctest/master/doctest/doctest.h) and save it under your build directory. Then create a copy and rename it to doctest_main.h. That way CMake doesn't try to download it.

I'll see what I can do about it.

[Petross404]

Is it related to any testing? Because if it is I could possibly turn off any tests as a workaround. But I looked with cmake-gui and I don't recall finding any lexy-related flag for tests.

[foonathan]

Yes, it is only for the tests. I currently don't have an option to disable tests; they're automatically disabled if it is a subdirectory.

[foonathan]

I've switched to FetchContent to get doctest and tests can be disabled using LEXY_BUILD_TESTS. Let me know if that works for you.