ci(gitlab): disable sccache

We disable sccache in GitLab base venv building to save some extra time.
Because we now use cached artifacts and incremental builds, the use of
sccache in those jobs has become redundant. By not installing sccache we
now save some extra bit of time.

Author: P403n1x87

scripts/gen_ext_cache_scripts.py

@@ -12,7 +12,7 @@
 
 # Get extension information from setup.py
 output = subprocess.check_output([sys.executable, ROOT / "setup.py", "ext_hashes", "--inplace"])
-cached_files = set()
+cached_files: t.Set[t.Tuple[str, str]] = set()
 for line in output.decode().splitlines():
     if not line.startswith("#EXTHASH:"):
         continue
@@ -41,7 +41,7 @@
         "\n".join(
             [
                 f"    test -f {cached_file} && (cp {cached_file} {dest} && touch {dest} "
-                f"&& echo 'Restored {cached_file} -> {dest}') || true"
+                f"&& echo '- restored {Path(cached_file).relative_to(CACHE)} -> {Path(dest).relative_to(ROOT)}')||true"
                 for cached_file, dest in cached_files
             ]
         )
@@ -52,7 +52,7 @@
         "\n".join(
             [
                 f"    test -f {cached_file} || mkdir -p {Path(cached_file).parent} && (cp {dest} {cached_file} "
-                f"&& echo 'Saved {dest} -> {cached_file}' || true)"
+                f"&& echo '- saved {Path(dest).relative_to(ROOT)} -> {Path(cached_file).relative_to(CACHE)}' || true)"
                 for cached_file, dest in cached_files
             ]
         )

scripts/gen_gitlab_config.py

@@ -268,21 +268,12 @@ def gen_build_base_venvs() -> None:
     CMAKE_BUILD_PARALLEL_LEVEL: '12'
     PIP_VERBOSE: '0'
     DD_PROFILING_NATIVE_TESTS: '1'
-    DD_USE_SCCACHE: '1'
     PIP_CACHE_DIR: '${{CI_PROJECT_DIR}}/.cache/pip'
-    SCCACHE_DIR: '${{CI_PROJECT_DIR}}/.cache/sccache'
-    DD_FAST_BUILD: '1'
     DD_CMAKE_INCREMENTAL_BUILD: '1'
     DD_SETUP_CACHE_DOWNLOADS: '1'
     EXT_CACHE_VENV: '${{CI_PROJECT_DIR}}/.cache/ext_cache_venv'
-  rules:
-    - if: '$CI_COMMIT_REF_NAME == "main"'
-      variables:
-        DD_FAST_BUILD: '0'
-    - when: always
   script: |
     set -e -o pipefail
-    apt update && apt install -y sccache
     pip install riot==0.20.1
     if [ ! -d $EXT_CACHE_VENV ]; then
         python$PYTHON_VERSION -m venv $EXT_CACHE_VENV
@@ -293,16 +284,18 @@ def gen_build_base_venvs() -> None:
     fi
     python scripts/gen_ext_cache_scripts.py
     deactivate
+    echo "Restoring native extensions"
     $SHELL scripts/restore-ext-cache.sh
     riot -P -v generate --python=$PYTHON_VERSION
     echo "Running smoke tests"
     riot -v run -s --python=$PYTHON_VERSION smoke_test
     source $EXT_CACHE_VENV/bin/activate
     python scripts/gen_ext_cache_scripts.py
     deactivate
+    echo "Saving native extensions"
     $SHELL scripts/save-ext-cache.sh
   cache:
-    # Share pip/sccache between jobs of the same Python version
+    # Share pip between jobs of the same Python version
     - key: v1-build_base_venvs-${{PYTHON_VERSION}}-cache-{current_month}
       paths:
         - .cache