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fix: make Linux example tests resilient to CI environments (#11)
* fix: make Linux example tests resilient to CI environments Linux example tests were failing on CI runners (ubuntu-latest) because: - ExampleProvider_Diagnostics expected exactly 2 collected components, but the count varies: /sys/class/dmi/id/product_uuid requires root, /etc/machine-id availability differs across environments. - Example_integrity expected WithMotherboard() to produce a different ID, but /sys/class/dmi/id/board_serial requires root on CI, so the motherboard component silently fails and both IDs are identical. - Example_linuxFileSources used WithDisk() which needs lsblk or /sys/block access that may not work on CI runners. Fix: use salt-based differentiation (always works regardless of hardware access), assert >= 1 collected instead of exact counts, and use only /proc/cpuinfo (always readable) in the file sources example. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: improve PR workflow test and coverage reporting Use go-test-coverage with .testcoverage.yml config for structured coverage reporting. Add set -o pipefail to catch failures in piped commands. Add pass/fail indicators to coverage output. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * style: fix trailing whitespace in example test files Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: use MAKE_DEBUG in CI workflows for visible test output All three workflows (release, main, pr) were hiding make command output due to exec_cmd redirecting to /dev/null. This made test failures impossible to debug in CI. Changes: - Replace MAKE_STOP_ON_ERRORS with MAKE_DEBUG=true globally so all make commands show raw output in CI logs - Pipe make output through 2>&1 | tee for step summaries - Align step names across all workflows ("Check out code", "Set up Go") - Add explicit job names to main.yml and pr.yml - Remove redundant "Go version" steps (setup-go already logs it) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: update golang version to v1.26.1 * feat: add cross-platform test matrix for Linux, macOS, and Windows Run tests on all three target platforms (ubuntu-latest, macos-latest, windows-latest) using a matrix strategy with fail-fast disabled. The test matrix uses `go test` directly (not `make test`) to avoid Makefile/bash portability issues on Windows runners. The Linux-only report job (summary, scc, coverage, build) runs after all platform tests pass. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * feat: add build and smoke test per OS in CI matrix After testing, each matrix runner (Linux, macOS, Windows) now builds the CLI binary and runs a smoke test that: - Prints version info - Generates a default machine ID and validates it is 64-char hex - Runs all components with JSON + diagnostics output - Validates the generated ID against the current machine - Tests VM-friendly, format 32, and salt modes Uses shell: bash on all runners (available on windows-latest) and runner.temp for the binary path to avoid cross-OS path issues. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: add synchronization to mockExecutor for concurrent test safety The mockExecutor was accessed concurrently by Windows collectIdentifiers goroutines without synchronization, causing data races on callCount map writes and concurrent map reads. Add sync.RWMutex to protect all map access in Execute, setOutput, and setError. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * chore: update words * docs: update Go version references to 1.26+ Update all documentation to reflect the go.mod bump to Go 1.26.1: - README.md: Go 1.25+ -> Go 1.26+ - CONTRIBUTING.md: Go 1.22 -> Go 1.26 - copilot-instructions.md: Go 1.22+ -> Go 1.26+ Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * fix: make smoke test resilient to Windows WMI transient failures On Windows CI runners, WMI can become transiently unavailable after repeated rapid invocations (each spawning concurrent wmic/PowerShell processes). This caused -vm and other modes to fail intermittently. The smoke test now: - Strictly validates the core path: version, 64-char hex ID, and round-trip validation (these must pass) - Runs additional CLI exercises (-all, -vm, -format, -salt) as non-fatal with WARN logging, since the core validation already proved the binary works Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * docs: fix API examples and document executor thread safety - Fix README.md: add missing ctx argument to ID() calls in Testing and Best Practices sections - Add sync.RWMutex to mock executor example in README.md to reflect thread safety requirement - Document that CommandExecutor implementations must be safe for concurrent use (Windows parallel goroutines) - Update doc.go Testing section with concurrency note Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * chore: clean up CodeQL workflow and remove boilerplate comments Remove auto-generated boilerplate comments, align step names with other workflows, and remove unused swift runner conditional. The file coverage deprecation warning on PRs is a CodeQL informational notice and requires no action (coverage still runs on push/schedule). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * chore: opt in to CodeQL file coverage skip on PRs Set CODEQL_ACTION_FILE_COVERAGE_ON_PRS=false to explicitly adopt the new default (April 2026) and suppress the informational warning. File coverage is still computed on push and schedule analyses. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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‎.github/copilot-instructions.md‎

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## Stack
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- Language: Go (Go 1.22+)
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- Language: Go (Go 1.26+)
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- Framework: Go standard library
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- Testing: Go's built-in testing package
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- Dependency Management: Go modules

‎.github/workflows/codeql.yml‎

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# For most projects, this workflow file will not need changing; you simply need
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# to commit it to your repository.
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#
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# You may wish to alter this file to override the set of languages analyzed,
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# or to provide custom queries or build logic.
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#
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# ******** NOTE ********
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# We have attempted to detect the languages in your repository. Please check
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# the `language` matrix defined below to confirm you have the correct set of
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# supported CodeQL languages.
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#
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name: "CodeQL Advanced"
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name: CodeQL Advanced
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on:
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push:
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schedule:
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- cron: "08 12 * * 4"
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env:
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# Opt in to the new CodeQL default: skip file coverage on PRs for faster analysis.
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# Coverage is still computed on push and schedule analyses.
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CODEQL_ACTION_FILE_COVERAGE_ON_PRS: false
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jobs:
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analyze:
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name: Analyze (${{ matrix.language }})
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# Runner size impacts CodeQL analysis time. To learn more, please see:
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# - https://gh.io/recommended-hardware-resources-for-running-codeql
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# - https://gh.io/supported-runners-and-hardware-resources
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# - https://gh.io/using-larger-runners (GitHub.com only)
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# Consider using larger runners or machines with greater resources for possible analysis time improvements.
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runs-on: ${{ (matrix.language == 'swift' && 'macos-latest') || 'ubuntu-latest' }}
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runs-on: ubuntu-latest
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permissions:
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# required for all workflows
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security-events: write
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# required to fetch internal or private CodeQL packs
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packages: read
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# only required for workflows in private repositories
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actions: read
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contents: read
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build-mode: none
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- language: go
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build-mode: autobuild
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# CodeQL supports the following values keywords for 'language': 'actions', 'c-cpp', 'csharp', 'go', 'java-kotlin', 'javascript-typescript', 'python', 'ruby', 'swift'
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# Use `c-cpp` to analyze code written in C, C++ or both
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# Use 'java-kotlin' to analyze code written in Java, Kotlin or both
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# Use 'javascript-typescript' to analyze code written in JavaScript, TypeScript or both
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# To learn more about changing the languages that are analyzed or customizing the build mode for your analysis,
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# see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning.
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# If you are analyzing a compiled language, you can modify the 'build-mode' for that language to customize how
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# your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
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steps:
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- name: Checkout repository
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- name: Check out code
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uses: actions/checkout@v6
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# Add any setup steps before running the `github/codeql-action/init` action.
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# This includes steps like installing compilers or runtimes (`actions/setup-node`
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# or others). This is typically only required for manual builds.
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# - name: Setup runtime (example)
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# uses: actions/setup-example@v1
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# Initializes the CodeQL tools for scanning.
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- name: Initialize CodeQL
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uses: github/codeql-action/init@v4
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with:
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languages: ${{ matrix.language }}
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build-mode: ${{ matrix.build-mode }}
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# If you wish to specify custom queries, you can do so here or in a config file.
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# By default, queries listed here will override any specified in a config file.
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# Prefix the list here with "+" to use these queries and those in the config file.
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# For more details on CodeQL's query packs, refer to: https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
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# queries: security-extended,security-and-quality
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# If the analyze step fails for one of the languages you are analyzing with
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# "We were unable to automatically build your code", modify the matrix above
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# to set the build mode to "manual" for that language. Then modify this step
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# to build your code.
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# ℹ️ Command-line programs to run using the OS shell.
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# 📚 See https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#jobsjob_idstepsrun
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echo 'If you are using a "manual" build mode for one or more of the' \
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'languages you are analyzing, replace this with the commands to build' \
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'your code, for example:'
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echo ' make bootstrap'
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echo ' make release'
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echo 'Manual build mode is not configured. Set build-mode to "autobuild" or add build commands here.'
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- name: Perform CodeQL Analysis

‎.github/workflows/main.yml‎

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jobs:
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build:
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test:
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name: Test (${{ matrix.os }})
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runs-on: ${{ matrix.os }}
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strategy:
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fail-fast: false
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matrix:
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os: [ubuntu-latest, macos-latest, windows-latest]
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steps:
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- name: Check out code
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uses: actions/checkout@v6
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- name: Set up Go
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uses: actions/setup-go@v6
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with:
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go-version-file: ./go.mod
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- name: Test
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run: go test -v -race -tags=unit ./...
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- name: Build CLI
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run: go build -v -o ${{ runner.temp }}/machineid${{ matrix.os == 'windows-latest' && '.exe' || '' }} ./cmd/machineid/
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- name: Generate machine ID (smoke test)
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shell: bash
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run: |
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BIN="${{ runner.temp }}/machineid${{ matrix.os == 'windows-latest' && '.exe' || '' }}"
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echo "--- Version ---"
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"$BIN" -version
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echo "--- Default ID (CPU + motherboard + UUID) ---"
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ID=$("$BIN")
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echo "ID: $ID"
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echo "Length: ${#ID}"
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# Verify the ID is a 64-char hex string
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if [[ ${#ID} -ne 64 ]]; then
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echo "ERROR: expected 64-char ID, got ${#ID}"
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exit 1
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fi
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if [[ ! "$ID" =~ ^[0-9a-f]{64}$ ]]; then
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echo "ERROR: ID is not a valid hex string"
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exit 1
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fi
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echo "--- Validate round-trip ---"
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"$BIN" -validate "$ID"
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# Exercise additional CLI modes.
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# On Windows CI, WMI can be transiently unavailable after repeated
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# invocations, so these are non-fatal — the core validation above
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# already proved the binary works.
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ERRORS=0
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echo "--- All components (JSON + diagnostics) ---"
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"$BIN" -all -json -diagnostics || { echo "WARN: -all failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- VM-friendly ---"
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"$BIN" -vm || { echo "WARN: -vm failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- Format 32 ---"
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"$BIN" -format 32 || { echo "WARN: -format 32 failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- Salt ---"
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"$BIN" -salt "ci-test" || { echo "WARN: -salt failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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if [[ $ERRORS -gt 0 ]]; then
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echo "WARN: $ERRORS non-critical exercise(s) failed on ${{ matrix.os }} (WMI transient issue)"
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fi
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echo "Smoke test passed on ${{ matrix.os }}"
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report:
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name: Report & Build
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needs: test
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env:
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MAKE_DEBUG: true
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- name: Checkout
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- name: Check out code
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# go install github.com/boyter/scc/v3@latest
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scc --format html-table . | tee -a $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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- name: Test
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- name: Test Coverage
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set -o pipefail
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echo "## Test Coverage" >> $GITHUB_STEP_SUMMARY
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go test -race -coverprofile=coverage.txt -covermode=atomic -tags=unit ./... | tee -a $GITHUB_STEP_SUMMARY
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make test 2>&1 | tee -a $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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- name: Test coverage
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echo "## Test Coverage" >> $GITHUB_STEP_SUMMARY
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go install github.com/vladopajic/go-test-coverage/v2@latest
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# Generate coverage report using standard library tools
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echo "" >> $GITHUB_STEP_SUMMARY
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echo "### Coverage report" >> $GITHUB_STEP_SUMMARY
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echo '```' >> $GITHUB_STEP_SUMMARY
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go tool cover -func=coverage.txt | tee -a $GITHUB_STEP_SUMMARY
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echo '```' >> $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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# Calculate total coverage percentage
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total_coverage=$(go tool cover -func=coverage.txt | grep total | awk '{print $3}')
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echo "**Total Coverage:** $total_coverage" >> $GITHUB_STEP_SUMMARY
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go-test-coverage --config=./.testcoverage.yml | sed 's/PASS/PASS ✅/g' | sed 's/FAIL/FAIL ❌/g' | tee -a $GITHUB_STEP_SUMMARY
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- name: Build
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go build ./... | tee -a $GITHUB_STEP_SUMMARY
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make build 2>&1 | tee -a $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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‎.github/workflows/pr.yml‎

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jobs:
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test:
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name: Test (${{ matrix.os }})
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runs-on: ${{ matrix.os }}
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strategy:
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fail-fast: false
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matrix:
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os: [ubuntu-latest, macos-latest, windows-latest]
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steps:
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- name: Check out code
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uses: actions/checkout@v6
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- name: Set up Go
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uses: actions/setup-go@v6
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with:
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go-version-file: ./go.mod
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- name: Test
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run: go test -v -race -tags=unit ./...
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- name: Build CLI
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run: go build -v -o ${{ runner.temp }}/machineid${{ matrix.os == 'windows-latest' && '.exe' || '' }} ./cmd/machineid/
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- name: Generate machine ID (smoke test)
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shell: bash
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run: |
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BIN="${{ runner.temp }}/machineid${{ matrix.os == 'windows-latest' && '.exe' || '' }}"
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echo "--- Version ---"
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"$BIN" -version
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echo "--- Default ID (CPU + motherboard + UUID) ---"
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ID=$("$BIN")
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echo "ID: $ID"
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echo "Length: ${#ID}"
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# Verify the ID is a 64-char hex string
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if [[ ${#ID} -ne 64 ]]; then
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echo "ERROR: expected 64-char ID, got ${#ID}"
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exit 1
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fi
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if [[ ! "$ID" =~ ^[0-9a-f]{64}$ ]]; then
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echo "ERROR: ID is not a valid hex string"
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exit 1
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fi
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echo "--- Validate round-trip ---"
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"$BIN" -validate "$ID"
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# Exercise additional CLI modes.
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# On Windows CI, WMI can be transiently unavailable after repeated
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# invocations, so these are non-fatal — the core validation above
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# already proved the binary works.
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ERRORS=0
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echo "--- All components (JSON + diagnostics) ---"
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"$BIN" -all -json -diagnostics || { echo "WARN: -all failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- VM-friendly ---"
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"$BIN" -vm || { echo "WARN: -vm failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- Format 32 ---"
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"$BIN" -format 32 || { echo "WARN: -format 32 failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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echo "--- Salt ---"
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"$BIN" -salt "ci-test" || { echo "WARN: -salt failed (non-fatal)"; ERRORS=$((ERRORS+1)); }
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if [[ $ERRORS -gt 0 ]]; then
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echo "WARN: $ERRORS non-critical exercise(s) failed on ${{ matrix.os }} (WMI transient issue)"
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fi
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echo "Smoke test passed on ${{ matrix.os }}"
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report:
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name: Report
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needs: test
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env:
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MAKE_DEBUG: true
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- name: Checkout
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- name: Check out code
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- name: Set up Go
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~/go/bin/$TOOL_NAME --version
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# go install github.com/boyter/scc/v3@latest
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scc --format html-table . | tee -a $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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- name: Test
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- name: Test Coverage
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run: |
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echo "### Test report" >> $GITHUB_STEP_SUMMARY
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set -o pipefail
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echo "## Test Coverage" >> $GITHUB_STEP_SUMMARY
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make test | tee -a $GITHUB_STEP_SUMMARY
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make test 2>&1 | tee -a $GITHUB_STEP_SUMMARY
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echo "## Test Coverage" >> $GITHUB_STEP_SUMMARY
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go install github.com/vladopajic/go-test-coverage/v2@latest
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# Generate coverage report using standard library tools
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echo "" >> $GITHUB_STEP_SUMMARY
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echo "### Coverage report" >> $GITHUB_STEP_SUMMARY
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echo '```' >> $GITHUB_STEP_SUMMARY
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go tool cover -func=coverage.txt | tee -a $GITHUB_STEP_SUMMARY
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echo '```' >> $GITHUB_STEP_SUMMARY
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echo "" >> $GITHUB_STEP_SUMMARY
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# Calculate total coverage percentage
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total_coverage=$(go tool cover -func=coverage.txt | grep total | awk '{print $3}')
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echo "**Total Coverage:** $total_coverage" >> $GITHUB_STEP_SUMMARY
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go-test-coverage --config=./.testcoverage.yml | sed 's/PASS/PASS ✅/g' | sed 's/FAIL/FAIL ❌/g' | tee -a $GITHUB_STEP_SUMMARY

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