[engineering] sourcemap issues

描述

❯ npm run gulp compile-build-without-mangling

❯ cat out-build/main.js.map | jq .sourceRoot
"file:///Users/tmm1/code/vscode/src"

❯ cat out-build/main.js.map | jq .sources
[
  "file:///Users/tmm1/code/vscode/src/main.ts",
  "main.ts"
]

❯ npm run gulp minify-vscode

❯ cat out-vscode/main.js.map | jq '.sources[0,1]'
"../file:/Users/tmm1/code/vscode/src/vs/base/common/performance.ts"
"../vs/base/common/performance.ts"

❯ cat out-vscode-min/main.js.map | jq '.sources[0,1]'
"./file:/Users/tmm1/code/vscode/src/vs/base/common/performance.ts"
"vs/base/common/performance.ts"

贡献者指南

技术栈

typescriptnodejs

领域

build systemdeveloper experience

议题类型

bug

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

4

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

3-5 days

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

blocked

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

understanding of sourcemapsfamiliarity with gulp build systemknowledge of TypeScript compilation

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

20

研究方向

The issue reports two problems: duplicate source file entries in generated sourcemaps and path corruption during minification. The reproduction steps are clearly given using gulp commands and jq queries. To investigate, start by examining the gulpfile build scripts, especially the 'compile build without mangling' and 'minify vscode' tasks. Look at the source map generation configuration, possibly in the TypeScript compiler options or a dedicated sourcemap plugin. The assignee may have insights; check the comments for any progress or hints. Consider proposing a fix that deduplicates source paths in the map generation step or normalizes paths before minification.