Fix MacOS hdiutil CMake parallelization issue

* Make CMake builds better parallelized
* Update CI Build script parallelization
* Make `repeat_hdiutil.sh` take longer between repeats
* Make sure that bash is the latest version on CI builds.

Signed-off-by: Emily Mabrey <emabrey@tenacityaudio.org>
Reference-to: https://github.com/tenacityteam/tenacity/pull/391

scripts/ci/build.sh

@@ -18,8 +18,12 @@ else # Linux & others
 
 fi
 
+export CMAKE_BUILD_PARALLEL_LEVEL=$(( ${cpus} > 2 ? $((${cpus} - 2)) : ${cpus} ))
+
+echo "Using ${CMAKE_BUILD_PARALLEL_LEVEL} processors for cmake build"
+
 # Build Audacity
-cmake --build build -j "${cpus}" --config "${AUDACITY_BUILD_TYPE}"
+cmake --build build --config "${AUDACITY_BUILD_TYPE}"
 
 BIN_OUTPUT_DIR=build/bin/${AUDACITY_BUILD_TYPE}
 SYMBOLS_OUTPUT_DIR=debug
@@ -29,7 +33,7 @@ mkdir ${SYMBOLS_OUTPUT_DIR}
 if [[ "${OSTYPE}" == msys* ]]; then # Windows
     # copy PDBs to debug folder...
     find ${BIN_OUTPUT_DIR} -name '*.pdb' | xargs -I % cp % ${SYMBOLS_OUTPUT_DIR}
-    # and remove debug symbol files from the file tree before archieving
+    # and remove debug symbol files from the file tree before archiving
     find ${BIN_OUTPUT_DIR} -name '*.iobj' -o -name '*.ipdb' -o -name '*.pdb' -o -name '*.ilk' | xargs rm -f
 elif [[ "${OSTYPE}" == darwin* ]]; then # macOS
     find ${BIN_OUTPUT_DIR} -name '*.dSYM' | xargs -J % mv % ${SYMBOLS_OUTPUT_DIR}

scripts/ci/dependencies.sh

@@ -10,7 +10,7 @@ if [[ "${OSTYPE}" == msys* ]]; then # Windows
 
         # Chocolatey packages
         choco_packages=(
-            sccache 
+            sccache
             conan
         )
 
@@ -44,6 +44,7 @@ else # Linux & others
             g++
             git
             wget
+            bash
 
             # GitHub Actions
             libasound2-dev
@@ -53,7 +54,7 @@ else # Linux & others
         )
         sudo apt-get update -y
         sudo apt-get install -y --no-install-recommends "${apt_packages[@]}"
-        
+
         # Download Conan from github
         wget "https://github.com/conan-io/conan/releases/latest/download/conan-ubuntu-64.deb" -nv -O /tmp/conan.deb
         sudo dpkg -i /tmp/conan.deb

scripts/ci/macos/repeat_hdiutil.sh

@@ -6,7 +6,7 @@ set -uo pipefail
 
 max_retry=5
 counter=0
-num_secs_await_retry=1
+num_secs_await_retry=5
 
 echo "Trying: " /usr/bin/hdiutil "$@"