build: add support for building for FreeBSD under Sourcehut [skip ci]

.builds/freebsd.yml

@@ -0,0 +1,40 @@
+image: freebsd/12.x
+
+packages:
+- cmake
+- gmake
+- ninja
+- libtool
+- sha
+- automake
+- pkgconf
+- unzip
+- wget
+- gettext
+- python
+- libffi
+
+sources:
+- https://github.com/neovim/neovim
+
+environment:
+  SOURCEHUT: 1
+  LANG: en_US.UTF-8
+  CMAKE_EXTRA_FLAGS: -DTRAVIS_CI_BUILD=ON -DMIN_LOG_LEVEL=3
+
+tasks:
+- build-deps: |
+    cd neovim
+    gmake deps
+- build: |
+    cd neovim
+    gmake CMAKE_BUILD_TYPE=Release CMAKE_EXTRA_FLAGS="${CMAKE_EXTRA_FLAGS}" nvim
+- test: |
+    cd neovim
+    gmake unittest functionaltest
+
+# Unfortunately, oldtest is tanking hard on sourcehut's FreeBSD instance
+# and not producing any logs as a result. So don't do this task for now.
+# - test-oldtest: |
+#     cd neovim
+#     gmake oldtest

test/helpers.lua

@@ -715,11 +715,14 @@ end
 
 function module.isCI(name)
   local any = (name == nil)
-  assert(any or name == 'appveyor' or name == 'quickbuild' or name == 'travis')
+  assert(any or name == 'appveyor' or name == 'quickbuild' or name == 'travis'
+    or name == 'sourcehut')
   local av = ((any or name == 'appveyor') and nil ~= os.getenv('APPVEYOR'))
   local tr = ((any or name == 'travis') and nil ~= os.getenv('TRAVIS'))
   local qb = ((any or name == 'quickbuild') and nil ~= lfs.attributes('/usr/home/quickbuild'))
-  return tr or av or qb
+  local sh = ((any or name == 'sourcehut') and nil ~= os.getenv('SOURCEHUT'))
+  return tr or av or qb or sh
+
 end
 
 -- Gets the contents of $NVIM_LOG_FILE for printing to the build log.