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ci: probe Blacksmith stimulus audio and display (scratch, not for merge)
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‎.github/workflows/bs-recording-probe.yml‎

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name: Blacksmith recording probe (scratch)
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on:
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push:
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branches: [scratch/verify-recording-bs-probe]
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permissions:
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contents: read
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jobs:
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real-capture:
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strategy:
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fail-fast: false
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matrix:
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runner: [blacksmith-6vcpu-macos-15, blacksmith-6vcpu-macos-26]
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runs-on: ${{ matrix.runner }}
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timeout-minutes: 45
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env:
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CAP_VERIFY_CAPTURE: display
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CAP_VERIFY_REQUIRE_CAPTURE: "1"
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CAP_VERIFY_TIER: ${{ inputs.tier || 'fast' }}
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CAP_VERIFY_REPEAT: ${{ inputs.repeat || '5' }}
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CAP_VERIFY_CASE: ${{ inputs.case_filter || '' }}
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CAP_VERIFY_KEEP: ${{ inputs.keep_artifacts && '1' || '' }}
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CAP_VERIFY_SCRATCH: ${{ github.workspace }}/verify-scratch
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CAP_VERIFY_REPORT_DIR: ${{ github.workspace }}/verify-report
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CAP_VERIFY_DUMP: ${{ github.workspace }}/verify-dump
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# Hosted macos-26 has a virtual output device that gives
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# ScreenCaptureKit only silence, so system audio is not required
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# there; Blacksmith gets BlackHole (set up below), which carries the
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# stimulus's audio to ScreenCaptureKit, so system audio is required
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# and the system-only case runs.
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CAP_VERIFY_AUDIO_OUTPUT: ${{ startsWith(matrix.runner, 'blacksmith-') && 'BlackHole 2ch' || matrix.runner == 'macos-26' && 'Null Audio Device' || '' }}
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CAP_VERIFY_REQUIRE_SYSTEM_AUDIO: ${{ startsWith(matrix.runner, 'blacksmith-') && '1' || '' }}
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steps:
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- uses: actions/checkout@v4
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- uses: dtolnay/rust-toolchain@1.88.0
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- uses: ./.github/actions/setup-rust-cache
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with:
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target: aarch64-apple-darwin
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prefix-key: v1-rust-verify-recording-${{ matrix.runner }}
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save-cache: "false"
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- uses: ./.github/actions/install-desktop-deps
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- uses: actions/setup-node@v4
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with:
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node-version: 24
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- name: Native dependencies
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env:
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RUST_TARGET_TRIPLE: aarch64-apple-darwin
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run: node scripts/setup.js
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- name: Runner devices
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run: |
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sw_vers
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system_profiler SPDisplaysDataType SPAudioDataType 2>/dev/null | sed -n 1,80p
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sysctl hw.memsize hw.ncpu
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# Spotlight indexes the build and every recording the suite writes:
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# mds (priority 50) plus a dozen mdworkers averaged 1 to 1.8 of the 3
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# cores during the tests (ps samples, run 38736744971).
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- name: Disable Spotlight indexing
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run: |
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sudo mdutil -a -i off || true
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sudo mdutil -as || true
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- name: Build
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run: |
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start=$(date +%s)
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cargo test --locked -p cap-verify --test recording --no-run
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echo "build seconds: $(( $(date +%s) - start ))"
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# Blacksmith runs a logged-in GUI session with SIP disabled, but
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# ScreenCaptureKit is denied until TCC grants the responsible process
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# (Runner.Worker), so grant Screen Recording (and Microphone) to every
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# binary that captures plus the whole runner ancestry, then restart
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# tccd. It has no audio device: BlackHole provides input and output.
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- name: Blacksmith capture permissions and audio device
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if: startsWith(matrix.runner, 'blacksmith-')
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run: |
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set -euo pipefail
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brew install --cask blackhole-2ch
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brew install switchaudio-osx
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sudo killall coreaudiod || true
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for i in $(seq 1 30); do
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SwitchAudioSource -a -t output | grep -qx "BlackHole 2ch" && break
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sleep 1
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done
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SwitchAudioSource -s "BlackHole 2ch" -t output
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SwitchAudioSource -s "BlackHole 2ch" -t input
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echo "outputs:"; SwitchAudioSource -a -t output
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echo "default output: $(SwitchAudioSource -c -t output)"
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cargo test --locked -p cap-verify --test recording --no-run --message-format=json 2>/dev/null \
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| python3 -c 'import json, sys
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for line in sys.stdin:
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m = json.loads(line)
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if m.get("reason") == "compiler-artifact" and m.get("executable") and m["target"]["name"] in ("recording", "cap-verify-stimulus"):
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print(m["executable"])' > "$RUNNER_TEMP/capture-binaries"
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test "$(wc -l < "$RUNNER_TEMP/capture-binaries")" -ge 2
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p=$$
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while [ "$p" -gt 1 ]; do
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ps -o comm= -p "$p"
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p=$(ps -o ppid= -p "$p" | tr -d ' ')
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done >> "$RUNNER_TEMP/capture-binaries"
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for c in "$(rustup which cargo)" "$HOME/.cargo/bin/cargo"; do echo "$c"; done >> "$RUNNER_TEMP/capture-binaries"
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db="/Library/Application Support/com.apple.TCC/TCC.db"
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approvals="$HOME/Library/Group Containers/group.com.apple.replayd/ScreenCaptureApprovals.plist"
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mkdir -p "$(dirname "$approvals")"
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now=$(date +%s)
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until=$(date -u -v+1y '+%a %b %d %H:%M:%S GMT %Y')
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sort -u "$RUNNER_TEMP/capture-binaries" | grep '^/' | while read -r client; do
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for service in kTCCServiceScreenCapture kTCCServiceMicrophone; do
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sudo sqlite3 "$db" "INSERT OR REPLACE INTO access (service,client,client_type,auth_value,auth_reason,auth_version,indirect_object_identifier,flags,last_modified) VALUES ('$service','$client',1,2,4,1,'UNUSED',0,$now);"
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done
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/usr/libexec/PlistBuddy -c "Add :$client date $until" "$approvals" >/dev/null 2>&1 || true
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echo "granted $client"
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done
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sudo killall tccd || true
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sleep 2
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- name: Probe displays and ScreenCaptureKit
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run: |
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cat > /tmp/disp.swift <<'SWIFT'
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import CoreGraphics
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import ScreenCaptureKit
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import Foundation
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print("CGMainDisplayID", CGMainDisplayID(), "preflight", CGPreflightScreenCaptureAccess())
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var ids = [CGDirectDisplayID](repeating: 0, count: 8); var n: UInt32 = 0
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CGGetActiveDisplayList(8, &ids, &n)
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for i in 0..<Int(n) { print("active", ids[i], CGDisplayBounds(ids[i])) }
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let sem = DispatchSemaphore(value: 0)
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SCShareableContent.getWithCompletionHandler { c, e in
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if let e = e { print("sck error", e) }
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for d in c?.displays ?? [] { print("sck display", d.displayID, d.width, d.height, d.frame) }
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print("sck windows", c?.windows.count ?? -1)
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sem.signal()
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}
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sem.wait()
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SWIFT
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swiftc -O /tmp/disp.swift -o /tmp/disp
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/tmp/disp
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sudo sqlite3 "/Library/Application Support/com.apple.TCC/TCC.db" "select client from access where service='kTCCServiceScreenCapture';" | head -3
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/tmp/disp_bin_dummy 2>/dev/null || true
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- name: Probe stimulus audio start
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run: |
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stim=$(grep cap-verify-stimulus "$RUNNER_TEMP/capture-binaries" | head -1)
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spec='{"fps":15.0,"seconds":4.0,"holds":[],"busy":true,"warmup":1.0,"audio":true,"audio_period":0.5,"audio_origin":0,"window":null}'
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for variant in blackhole default; do
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echo "=== variant $variant"
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if [ "$variant" = default ]; then unset CAP_VERIFY_AUDIO_OUTPUT; fi
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( sleep 100000 | "$stim" "$spec" /tmp/stim-$variant.jsonl > /tmp/stim-$variant.out 2>&1 ) &
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sleep 12
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pid=$(pgrep -f "cap-verify-stimulus" | head -1)
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echo "pid $pid"; cat /tmp/stim-$variant.out; echo "log:"; cat /tmp/stim-$variant.jsonl | head -5
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if [ -n "$pid" ]; then sample "$pid" 2 -file /tmp/sample-$variant.txt >/dev/null 2>&1; grep -A45 "Thread_.*DispatchQueue_1: com.apple.main-thread" /tmp/sample-$variant.txt | cut -c1-160 | head -60; pkill -f cap-verify-stimulus || true; fi
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sleep 2
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done
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- name: Probe one capture case
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run: |
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RUST_LOG=cap_recording=debug,scap_targets=debug CAP_VERIFY_CASE=recording/instant/late-mic CAP_VERIFY_TIER=full CAP_VERIFY_REPEAT=1 \
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cargo test --locked -p cap-verify --test recording real_capture -- --nocapture 2>&1 | grep -iE "display|content filter|AsContentFilter|FAIL|pass|xfail|shareable" | head -40 || true

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