worker を追加（yt-dlp によるダウンロード、段階別進捗、ffprobe 検査、実行中の取り消し）

internal/worker/testdata/fake-ffprobe.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+set -eu
+case "${FAKE_FFPROBE_MODE:-valid}" in
+  invalid|bad-container)
+    echo '{"format":{"format_name":"matroska"},"streams":[{"codec_type":"video","codec_name":"h264"},{"codec_type":"audio","codec_name":"aac"}]}' ;;
+  bad-video)
+    echo '{"format":{"format_name":"mp4"},"streams":[{"codec_type":"video","codec_name":"vp9"},{"codec_type":"audio","codec_name":"aac"}]}' ;;
+  bad-audio)
+    echo '{"format":{"format_name":"mp4"},"streams":[{"codec_type":"video","codec_name":"h264"},{"codec_type":"audio","codec_name":"opus"}]}' ;;
+  non-json)
+    echo 'not JSON' ;;
+  failure)
+    echo 'probe failed' >&2
+    exit 1 ;;
+  *)
+    echo '{"format":{"format_name":"mov,mp4,m4a,3gp,3g2,mj2"},"streams":[{"codec_type":"video","codec_name":"h264"},{"codec_type":"audio","codec_name":"aac"}]}' ;;
+esac

internal/worker/testdata/fake-yt-dlp.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+set -eu
+
+[ -z "${FAKE_ARGS_FILE:-}" ] || printf '%s\n' "$@" > "$FAKE_ARGS_FILE"
+
+output_template=
+episode_url=
+while [ "$#" -gt 0 ]; do
+  if [ "$1" = "-o" ]; then
+    output_template=$2
+    shift 2
+    continue
+  fi
+  case "$1" in
+    https://tver.jp/episodes/*) episode_url=$1 ;;
+  esac
+  shift
+done
+
+mode=${FAKE_YTDLP_MODE:-success}
+if [ "$mode" = "mixed" ]; then
+  case "$episode_url" in
+    */ep-fail) mode=unknown ;;
+    *) mode=success ;;
+  esac
+fi
+case "$mode" in
+  drm) echo 'ERROR: This video is DRM protected token=secret-value' >&2; exit 1 ;;
+  geo) echo 'ERROR: This video is not available from your location due to geo restriction' >&2; exit 1 ;;
+  network) echo 'ERROR: Unable to download JSON metadata: [Errno 61] Connection refused' >&2; exit 1 ;;
+  unavailable) echo 'ERROR: MEDIA_NOT_FOUND: episode does not exist' >&2; exit 1 ;;
+  extract) echo 'ERROR: Unable to extract player data' >&2; exit 1 ;;
+  unknown) echo 'ERROR: surprising failure' >&2; exit 1 ;;
+  hang|hang-drm)
+    [ -z "${FAKE_READY_FILE:-}" ] || : > "$FAKE_READY_FILE"
+    if [ "$mode" = "hang-drm" ]; then
+      trap 'echo "ERROR: DRM protected" >&2; [ -z "${FAKE_TERM_FILE:-}" ] || : > "$FAKE_TERM_FILE"; exit 143' TERM INT
+    else
+      trap '[ -z "${FAKE_TERM_FILE:-}" ] || : > "$FAKE_TERM_FILE"; exit 143' TERM INT
+    fi
+    while :; do sleep 1; done
+    ;;
+esac
+
+output=$(printf '%s' "$output_template" | sed 's/%(id)s/fake/g; s/%(ext)s/mp4/g')
+mkdir -p "$(dirname "$output")"
+printf 'fake mp4' > "$output"
+if [ "$mode" = "symlink" ]; then
+  rm "$output"
+  ln -s "$FAKE_OUTSIDE_FILE" "$output"
+fi
+
+if [ "$mode" = "burst" ]; then
+  i=1
+  while [ "$i" -le 20 ]; do
+    printf '{"event":"download","format_id":"hls-698-1","progress":{"status":"downloading","downloaded_bytes":%s,"total_bytes":100,"speed":10,"eta":2,"fragment_index":%s,"fragment_count":20}}\n' "$i" "$i"
+    i=$((i + 1))
+  done
+  sleep 0.12
+else
+  echo '{"event":"download","format_id":"hls-698-1","progress":{"status":"downloading","downloaded_bytes":1024,"fragment_index":0,"fragment_count":50,"filename":"/private/tmp/tver-spike/epq432nee4.fhls-698-1.mp4","tmpfilename":"/private/tmp/tver-spike/epq432nee4.fhls-698-1.mp4.part","max_progress":null,"progress_idx":null,"elapsed":0,"total_bytes_estimate":29798400.0,"speed":4834.271158821972,"eta":null,"_eta_str":"Unknown","_speed_str":"   4.72KiB/s","_percent":0.003436426116838488,"_percent_str":"  0.0%","_total_bytes_str":"       N/A","_total_bytes_estimate_str":"  28.42MiB","_downloaded_bytes_str":"   1.00KiB","_elapsed_str":"00:00:00","_default_template":"  0.0% of ~  28.42MiB at    4.72KiB/s ETA Unknown (frag 0/50)"}}'
+  sleep 0.02
+  echo '{"event":"download","format_id":"hls-ts_AUDIO-0_2","progress":{"status":"finished","downloaded_bytes":50,"total_bytes":50,"speed":20,"eta":0}}'
+  sleep 0.02
+  echo '{"event":"postprocess","progress":{"status":"started","postprocessor":"Merger"}}' >&2
+fi
+printf '{"event":"after_move","filepath":"%s"}\n' "$output"