兩個壓縮包檔案為何蓋在同一個目標？

先核來源與已訂規則

本例用 ASCII 路徑名稱，並明訂目標是否分大小寫。不分時 A.txt、a.txt 是同一目標鍵；兩原項及位元組仍須分得開。撞鍵便停整包，不選最後項頂上。

已填假設輸入
紀錄	輸入 JSON
原例輸入	{"caseSensitive":false,"entries":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}]}

下載可編輯 CSV ↓

比較兩條實際路徑

錯目標集合只剩 a.txt 的 66；更正保 A.txt 的 65、a.txt 的 66，列碰撞，沒有預定寫入項。

錯誤與更正路徑的輸出
路徑	輸出 JSON
錯誤路徑	{"accepted":true,"files":[{"destination":"/import/a.txt","source":"a.txt","bytes":[66]}]}
更正路徑	{"accepted":false,"sources":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}],"collisions":[{"destination":"/import/a.txt","sources":["A.txt","a.txt"]}],"files":[]}

下載可編輯 CSV ↓

本地 Node.js 程序：22.23.3 或 24.14.1

import {DatabaseSync} from 'node:sqlite';
import {TextDecoder} from 'node:util';
import {inflateSync} from 'node:zlib';
import {posix} from 'node:path';
import {createHash} from 'node:crypto';
const rows=(db,sql)=>db.prepare(sql).all().map(r=>({...r}));
const failed=(action)=>{try{action();return null;}catch(e){return {code:e.errcode??e.code??e.name};}};

import assert from 'node:assert/strict';
const run=function run(i,corrected=true){
    const groups=new Map();const sourceEntries=structuredClone(i.entries);
    for(const e of i.entries){const path=posix.resolve('/import',e.name);const destination=i.caseSensitive?path:path.toLowerCase();
      if(!groups.has(destination))groups.set(destination,[]);groups.get(destination).push(e);}
    if(!corrected)return {accepted:true,files:[...groups].map(([destination,entries])=>{const e=entries.at(-1);return {destination,source:e.name,bytes:e.bytes};})};
    const collisions=[...groups].filter(([,es])=>es.length>1).map(([destination,es])=>({destination,sources:es.map(e=>e.name)}));
    return {accepted:collisions.length===0,sources:sourceEntries,collisions,files:collisions.length?[]:[...groups].map(([destination,es])=>({destination,source:es[0].name,bytes:es[0].bytes}))};
  };
const cases=[{"label":"misleading base","input":{"caseSensitive":false,"entries":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}]},"expected":{"accepted":true,"files":[{"destination":"/import/a.txt","source":"a.txt","bytes":[66]}]},"corrected":false},{"label":"corrected base","input":{"caseSensitive":false,"entries":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}]},"expected":{"accepted":false,"sources":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}],"collisions":[{"destination":"/import/a.txt","sources":["A.txt","a.txt"]}],"files":[]},"corrected":true},{"label":"declared case-sensitive destination","input":{"caseSensitive":true,"entries":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}]},"expected":{"accepted":true,"sources":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}],"collisions":[],"files":[{"destination":"/import/A.txt","source":"A.txt","bytes":[65]},{"destination":"/import/a.txt","source":"a.txt","bytes":[66]}]},"corrected":true},{"label":"single destination entry","input":{"caseSensitive":false,"entries":[{"name":"A.txt","bytes":[65]}]},"expected":{"accepted":true,"sources":[{"name":"A.txt","bytes":[65]}],"collisions":[],"files":[{"destination":"/import/a.txt","source":"A.txt","bytes":[65]}]},"corrected":true}];
for(const test of cases){
  const actual=run(test.input,test.corrected);
  assert.deepEqual(actual,test.expected,test.label);
  console.log(test.label,actual);
}

下載可執行例子 ↓

下次載入前核邊界

明訂分大小寫便有兩個目標；不分模式只得一項時也沒有碰撞。

可編輯邊界紀錄及預期輸出
情況	輸入 JSON	預期輸出 JSON
明訂分大小寫目標	{"caseSensitive":true,"entries":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}]}	{"accepted":true,"sources":[{"name":"A.txt","bytes":[65]},{"name":"a.txt","bytes":[66]}],"collisions":[],"files":[{"destination":"/import/A.txt","source":"A.txt","bytes":[65]},{"destination":"/import/a.txt","source":"a.txt","bytes":[66]}]}
只有一個來源項目	{"caseSensitive":false,"entries":[{"name":"A.txt","bytes":[65]}]}	{"accepted":true,"sources":[{"name":"A.txt","bytes":[65]}],"collisions":[],"files":[{"destination":"/import/a.txt","source":"A.txt","bytes":[65]}]}

下載可編輯 CSV ↓

此約定可否靜靜以最後項勝出？

查看參考答案

不可，兩來源都留，共同目標暫停，另作明確處理。

先核來源與已訂規則

比較兩條實際路徑

下次載入前核邊界

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