rp-pack: never overwrite base resourcepack sounds/paintings (v0.3.5)

If the base resourcepack already has audio files under
assets/musicquiz/sounds/ or entries in assets/musicquiz/sounds.json,
the build now PRESERVES them and skips any new track that would
collide. Same policy for painting textures: existing cover_*.png
in the base are not overwritten by new ones.

Per-track collision is logged so the user can see exactly what was
preserved and what was skipped. Summary counts (added / skipped)
are also logged.

Requested by 사금향: "기존에 있는걸 삭제하거나 이상하게 엎어쓰지
말것" — preserve base assets unconditionally.

src/installer-rp/pack.ts

@@ -131,6 +131,10 @@ export async function buildResourcepackZip(opts: BuildResourcepackOptions): Prom
   opts.log?.(t('log.packFormatRange', { min: minFmt, max: maxFmt }))
 
   // 2) 음악 파일 복사 + sounds.json 생성/병합
+  // 핵심 정책: 베이스 리소스팩에 이미 있는 자산은 절대 덮어쓰지 않는다.
+  // - 베이스 sounds.json 의 엔트리는 그대로 보존하고, 우리 트랙은 그 위에 "추가" 만 한다.
+  // - 베이스 sounds/track_NN.ogg 가 이미 있으면 덮어쓰지 않고 건너뛴다.
+  // - 키나 파일명이 충돌하면 우리 트랙을 스킵하고 로그로 알린다.
   const musicFiles = (await fs.readdir(opts.musicDir))
     .filter((n) => n.toLowerCase().endsWith('.ogg'))
     .sort()
@@ -147,28 +151,62 @@ export async function buildResourcepackZip(opts: BuildResourcepackOptions): Prom
   } catch {
     // 없으면 새로 생성.
   }
+  let musicAdded = 0
+  const musicSkipped: string[] = []
   for (const fname of musicFiles) {
     throwIfCancelled(cancel)
     // NN.ogg → track_NN.ogg 로 리네임해 패키지.
     const stem = path.basename(fname, path.extname(fname)) // "01"
     const trackId = `track_${stem}`
-    await fs.copyFile(path.join(opts.musicDir, fname), path.join(soundsDir, `${trackId}.ogg`))
+    const destFile = path.join(soundsDir, `${trackId}.ogg`)
+    // 베이스에 같은 trackId 의 엔트리/파일이 있으면 보존 (덮어쓰지 않음).
+    let collides = soundsJson[trackId] !== undefined
+    if (!collides) {
+      try { await fs.access(destFile); collides = true } catch { /* 없음 → OK */ }
+    }
+    if (collides) {
+      musicSkipped.push(trackId)
+      opts.log?.(t('log.trackCollisionSkipped', { trackId }))
+      continue
+    }
+    await fs.copyFile(path.join(opts.musicDir, fname), destFile)
     soundsJson[trackId] = {
       sounds: [
         { name: `${NAMESPACE}:${trackId}`, stream: true }
       ]
     }
+    musicAdded++
   }
   await fs.writeFile(soundsJsonPath, JSON.stringify(soundsJson, null, 2) + '\n')
+  opts.log?.(t('log.tracksAdded', { count: musicAdded }))
+  if (musicSkipped.length > 0) {
+    opts.log?.(t('log.tracksCollisionSummary', { count: musicSkipped.length, list: musicSkipped.join(', ') }))
+  }
   throwIfCancelled(cancel)
 
-  // 3) painting 텍스처 복사 (이미 cover_NN.png 형태). 같은 파일명은 덮어씀.
+  // 3) painting 텍스처 복사 (이미 cover_NN.png 형태).
+  // 음악과 동일한 정책: 베이스에 같은 파일명이 이미 있으면 덮어쓰지 않고 건너뛴다.
   const paintingFiles = (await fs.readdir(opts.paintingDir))
     .filter((n) => n.toLowerCase().endsWith('.png'))
     .sort()
+  let paintingAdded = 0
+  const paintingSkipped: string[] = []
   for (const fname of paintingFiles) {
     throwIfCancelled(cancel)
-    await fs.copyFile(path.join(opts.paintingDir, fname), path.join(paintingOutDir, fname))
+    const destFile = path.join(paintingOutDir, fname)
+    let collides = false
+    try { await fs.access(destFile); collides = true } catch { /* 없음 → OK */ }
+    if (collides) {
+      paintingSkipped.push(fname)
+      opts.log?.(t('log.paintingCollisionSkipped', { name: fname }))
+      continue
+    }
+    await fs.copyFile(path.join(opts.paintingDir, fname), destFile)
+    paintingAdded++
+  }
+  opts.log?.(t('log.paintingsAdded', { count: paintingAdded }))
+  if (paintingSkipped.length > 0) {
+    opts.log?.(t('log.paintingsCollisionSummary', { count: paintingSkipped.length, list: paintingSkipped.join(', ') }))
   }
   throwIfCancelled(cancel)