Restructure Gitlab CI to prevent race-condition

.gitlab-ci.yml

@@ -11,9 +11,15 @@ stages:
 - build_clang
 - test_clang
 
+cache:
+  key: "$CI_COMMIT_SHA"
+  paths:
+    - build/
+    - XerusTest
+
 job_build_homepage:
   stage: build_homepage
-  script: "cp .config.mk.ci.gcc config.mk; make -C doc doc && scp -r doc/html xerusweb:libxerus.org-443"
+  script: "cp .gitlab-ci-configs/.config.mk.ci.gcc config.mk; make -C doc doc && scp -r doc/html xerusweb:libxerus.org-443"
   when: always
   only: 
     - master
@@ -21,34 +27,34 @@ job_build_homepage:
 
 job_make_gcc:
   stage: build_gcc
-  script: "g++ --version; cp .config.mk.ci.gcc config.mk; make XerusTest; cp XerusTest ../"
+  script: "g++ --version; cp .gitlab-ci-configs/.config.mk.ci.gcc config.mk; make XerusTest"
   when: always
 
 job_test_gcc:
   stage: test_gcc
-  script: "cp ../XerusTest .; ./XerusTest all"
+  script: "./XerusTest all"
 
 job_make_gcc_nocheck:
   stage: build_gcc_nocheck
-  script: "g++ --version; cp .config.mk.ci.gcc.nocheck config.mk; make XerusTest; cp XerusTest ../"
+  script: "g++ --version; cp .gitlab-ci-configs/.config.mk.ci.gcc.nocheck config.mk; make XerusTest"
 
 job_test_gcc_nocheck:
   stage: test_gcc_nocheck
-  script: "cp ../XerusTest .; ./XerusTest all"
+  script: "./XerusTest all"
 
 job_build_python2:
   stage: build_python2
-  script: "g++ --version; cp .config.mk.ci.gcc.python config.mk; make python2"
+  script: "g++ --version; cp .gitlab-ci-configs/.config.mk.ci.gcc.python config.mk; make python2"
   when: always
 
 job_build_python3:
   stage: build_python3
-  script: "g++ --version; cp .config.mk.ci.gcc.python config.mk; make python3"
+  script: "g++ --version; cp .gitlab-ci-configs/.config.mk.ci.gcc.python config.mk; make python3"
   when: always
 
 job_test_python2:
   stage: test_python2
-  script: "g++ --version; cp .config.mk.ci.gcc.python config.mk; make test_python2"
+  script: "g++ --version; cp .gitlab-ci-configs/.config.mk.ci.gcc.python config.mk; make test_python2"
   when: always
 
 #job_test_python3:
@@ -58,10 +64,10 @@ job_test_python2:
 
 job_make_clang:
   stage: build_clang
-  script: "clang++ --version; cp .config.mk.ci.clang config.mk; make XerusTest; cp XerusTest ../"
+  script: "clang++ --version; cp .gitlab-ci-configs/.config.mk.ci.clang config.mk; make XerusTest"
   when: always
 
 job_test_clang:
   stage: test_clang
-  script: "cp ../XerusTest .; ./XerusTest all"
+  script: "./XerusTest all"