Support out-of-source build

Until this moment, it was impossible to build `luatest` by out-of-source
mean which is a common practice. Now it is fixed.

Author: ylobankov

.github/workflows/test_on_push.yaml

@@ -22,15 +22,15 @@ jobs:
 
       - name: Install requirements for community
         run: |
-          cmake .
-          make bootstrap
+          cmake -S . -B build
+          make -C build bootstrap
 
       # This server starts and listen on 8084 port that is used for tests
       - name: Stop Mono server
         run: sudo kill -9 $(sudo lsof -t -i tcp:8084) || true
 
       - name: Run linter
-        run: make lint
+        run: make -C build lint
 
       - name: Run tests
         run: bin/luatest -v --shuffle group

.luacheckrc

@@ -1,4 +1,4 @@
 include_files = {"**/*.lua", "*.rockspec", "*.luacheckrc"}
-exclude_files = {"lua_modules/", ".luarocks/", ".rocks/", "tmp/"}
+exclude_files = {"build.luarocks/", "lua_modules/", "tmp/", ".luarocks/", ".rocks/"}
 
 max_line_length = 120

CMakeLists.txt

@@ -37,30 +37,41 @@ set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES build)
 
 set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES .rocks)
 add_custom_command(
-  OUTPUT .rocks
+  OUTPUT ${PROJECT_SOURCE_DIR}/.rocks
   DEPENDS ${PROJECT_NAME}-scm-1.rockspec
   COMMAND tarantoolctl rocks make ./${PROJECT_NAME}-scm-1.rockspec
   COMMAND tarantoolctl rocks install http 1.1.0
   COMMAND tarantoolctl rocks install luacheck 0.25.0
   COMMAND tarantoolctl rocks install luacov 0.13.0
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
 )
 
-add_custom_target(bootstrap DEPENDS .rocks)
+add_custom_target(bootstrap DEPENDS ${PROJECT_SOURCE_DIR}/.rocks)
 
 add_custom_command(
-  OUTPUT .rocks/bin/ldoc
+  OUTPUT ${PROJECT_SOURCE_DIR}/.rocks/bin/ldoc
   DEPENDS bootstrap
   COMMAND tarantoolctl rocks install ldoc --server=http://rocks.moonscript.org
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
 )
 
 set_property(DIRECTORY APPEND PROPERTY ADDITIONAL_MAKE_CLEAN_FILES doc)
 add_custom_target(doc
-  DEPENDS .rocks/bin/ldoc
+  DEPENDS ${PROJECT_SOURCE_DIR}/.rocks/bin/ldoc
   COMMAND .rocks/bin/ldoc -t ${PROJECT_NAME}-scm-1 -p ${PROJECT_NAME} --all .
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
 )
 
-add_custom_target(lint DEPENDS bootstrap COMMAND .rocks/bin/luacheck .)
-add_custom_target(selftest DEPENDS bootstrap COMMAND bin/luatest --shuffle group)
+add_custom_target(lint
+  DEPENDS bootstrap
+  COMMAND .rocks/bin/luacheck .
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+)
+add_custom_target(selftest
+  DEPENDS bootstrap
+  COMMAND bin/luatest --shuffle group
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+)
 
 add_custom_target(test_with_coverage_report
   DEPENDS bootstrap
@@ -69,6 +80,7 @@ add_custom_target(test_with_coverage_report
   COMMAND .rocks/bin/luacov .
   COMMAND echo
   COMMAND grep -A999 '^Summary' tmp/luacov.report.out
+  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
 )
 
 ## Test #######################################################################