Step 5 · Initialize development
Build the toolchain and cache directories with reproducible scripts
Put the setup process in a script or internal runbook. The goal is not merely a successful one-time installation, but for the team to understand where every tool comes from, how versions are pinned, where caches live, and which logs to inspect when something fails.
Toolchain
Install only components required by the current project
Check version requirements for macOS, Xcode, command-line tools, runtimes, and package-manager dependencies. Install the minimum set first, then add debugging and analysis tools after the test build passes.
Repository access
Pull code with least-privilege credentials
Configure restricted repository access for the machine and verify that read-only or read-write scope matches the task. Key files must not enter the repository, build artifacts, or publicly readable log directories.
Signing materials
Separate import, use, and backup paths
Import only the signing materials required for the current build, restrict file permissions, and record the owner and rotation process. When outputting logs, hide sensitive content beyond certificate fingerprints.
Cache strategy
Separate dependencies, derived data, and archives
Use separate directories for dependency caches, derived data, temporary builds, and final archives. Define capacity thresholds and cleanup order so cleanup scripts do not remove artifacts that still need to be retained.
bootstrap / validation
mkdir -p "$HOME/workspace"
mkdir -p "$HOME/build-cache"
mkdir -p "$HOME/build-artifacts"
git clone "$REPOSITORY_URL" "$HOME/workspace/project"
cd "$HOME/workspace/project"
xcodebuild -version
sw_vers
df -h "$HOME"
xcodebuild \
-workspace "$WORKSPACE_NAME" \
-scheme "$SCHEME_NAME" \
-configuration Debug \
-derivedDataPath "$HOME/build-cache/DerivedData" \
build | tee "$HOME/build-artifacts/test-build.log"
Environment details recorded
LOG SAVED
Test build acceptance criteria: The repository can be cloned, dependencies resolve, the target scheme is recognized, the build completes without unexplained errors, artifacts enter the designated directory, and logs contain no complete credentials or unredacted business data. If the build fails, preserve a copy of the original log before retrying.