test: cover real package read-write overlaps

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/dts-self-resolution/dist/index.d.ts

@@ -0,0 +1,3 @@
+export interface Existing {
+  value: string;
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/dts-self-resolution/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "dts-self-resolution-overlap",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
+    }
+  },
+  "scripts": {
+    "overlap": "tsdown --logLevel silent"
+  }
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/dts-self-resolution/src/index.ts

@@ -0,0 +1,3 @@
+import type { Existing } from 'dts-self-resolution-overlap';
+
+export type Public = Existing;

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/dts-self-resolution/tsconfig.json

@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "target": "ES2023"
+  },
+  "include": ["src"]
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/dts-self-resolution/tsdown.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+  clean: false,
+  dts: { emitDtsOnly: true },
+  entry: ['src/index.ts'],
+  fixedExtension: false,
+  format: 'esm',
+  logLevel: 'silent',
+  outDir: 'dist',
+});

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/oxfmt-in-place/.oxfmtrc.json

@@ -0,0 +1 @@
+{}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/oxfmt-in-place/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "oxfmt-in-place-overlap",
+  "private": true,
+  "scripts": {
+    "overlap": "oxfmt --threads=1 source.ts"
+  }
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/oxfmt-in-place/source.ts

@@ -0,0 +1 @@
+export const value={answer:42}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tailwind-output/dist/output.css

@@ -0,0 +1,3 @@
+.stale {
+  color: blue;
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tailwind-output/input.css

@@ -0,0 +1,3 @@
+.fixture {
+  color: red;
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tailwind-output/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "tailwind-output-overlap",
+  "private": true,
+  "scripts": {
+    "overlap": "tailwindcss -i input.css -o dist/output.css --minify"
+  }
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-clean/dist/index.js

@@ -0,0 +1 @@
+export const stale = true;

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-clean/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "tsdown-clean-overlap",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "overlap": "tsdown --logLevel silent"
+  }
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-clean/src/index.ts

@@ -0,0 +1 @@
+export const answer: number = 42;

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-clean/tsdown.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+  clean: true,
+  dts: false,
+  entry: ['src/index.ts'],
+  fixedExtension: false,
+  format: 'esm',
+  logLevel: 'silent',
+  outDir: 'dist',
+});

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-shebang/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "tsdown-shebang-overlap",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "overlap": "tsdown --logLevel silent"
+  }
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-shebang/src/index.ts

@@ -0,0 +1,3 @@
+#!/usr/bin/env node
+
+export const answer: number = 42;

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/cases/tsdown-shebang/tsdown.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'tsdown';
+
+export default defineConfig({
+  clean: false,
+  dts: false,
+  entry: ['src/index.ts'],
+  fixedExtension: false,
+  format: 'esm',
+  logLevel: 'silent',
+  outDir: 'dist',
+});

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "real-package-read-write-overlaps",
+  "private": true
+}

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/pnpm-workspace.yaml

@@ -0,0 +1,2 @@
+packages:
+  - cases/*

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots.toml

@@ -0,0 +1,44 @@
+[[e2e]]
+name = "tsdown_clean_reads_and_rewrites_dist"
+comment = """
+tsdown expands the configured clean paths with `tinyglobby` and removes every matched entry before the bundle writes its replacement. With an existing `dist/index.js`, the build therefore observes and removes that path before emitting `dist/index.js` again. See [`cleanOutDir`](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/features/clean.ts#L14-L45).
+"""
+cwd = "cases/tsdown-clean"
+ignore = true
+steps = [{ argv = ["vt", "run", "-v", "overlap"] }]
+
+[[e2e]]
+name = "tsdown_shebang_reads_and_changes_emitted_entry"
+comment = """
+After Rolldown writes a shebang entry, tsdown checks that emitted file with `access` and then changes its mode with `chmod`. The same `dist/index.js` is consequently read and mutated during one build. See [the shebang plugin](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/features/shebang.ts#L18-L34) and [`fsExists`](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/utils/fs.ts#L5-L9).
+"""
+cwd = "cases/tsdown-shebang"
+ignore = true
+steps = [{ argv = ["vt", "run", "-v", "overlap"] }]
+
+[[e2e]]
+name = "dts_self_resolution_reads_and_rewrites_declaration"
+comment = """
+The source imports a type through its own package name, whose `exports.types` target is the existing `dist/index.d.ts`. rolldown-plugin-dts delegates that import to TypeScript's bundler resolver and creates a TypeScript program, so the declaration is resolved and read before the declaration bundle replaces the same path. See [`tscResolve`](https://github.com/sxzz/rolldown-plugin-dts/blob/363cc09b660675e15ec8791ce0f05f1044a7048a/src/tsc/resolver.ts#L7-L38) and [the TypeScript program construction](https://github.com/sxzz/rolldown-plugin-dts/blob/363cc09b660675e15ec8791ce0f05f1044a7048a/src/tsc/emit-compiler.ts#L112-L128).
+"""
+cwd = "cases/dts-self-resolution"
+ignore = true
+steps = [{ argv = ["vt", "run", "-v", "overlap"] }]
+
+[[e2e]]
+name = "tailwind_reads_and_rewrites_output"
+comment = """
+Tailwind's CLI stats and reads an existing output file to compare its contents with the newly generated CSS, then writes the file when the contents differ. This makes `dist/output.css` both a read and a write in one command. See [`outputFile`](https://github.com/tailwindlabs/tailwindcss/blob/8a14a710102cae195f6811e8578bef9477bc6be9/packages/%40tailwindcss-cli/src/commands/build/utils.ts#L15-L34).
+"""
+cwd = "cases/tailwind-output"
+ignore = true
+steps = [{ argv = ["vt", "run", "-v", "overlap"] }]
+
+[[e2e]]
+name = "oxfmt_reads_and_rewrites_source"
+comment = """
+In write mode, oxfmt reads each source file, formats the text, and writes changed text back to that same path. The checked-in `source.ts` is intentionally unformatted, so the file is both read and written. See [the formatter service's read and write sequence](https://github.com/oxc-project/oxc/blob/5306f24d9e82ae36ad9c3c964f33075bc589c799/apps/oxfmt/src/cli/service.rs#L42-L82) and [`read_to_string`](https://github.com/oxc-project/oxc/blob/5306f24d9e82ae36ad9c3c964f33075bc589c799/apps/oxfmt/src/core/utils.rs#L50-L53).
+"""
+cwd = "cases/oxfmt-in-place"
+ignore = true
+steps = [{ argv = ["vt", "run", "-v", "overlap"] }]

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots/dts_self_resolution_reads_and_rewrites_declaration.md

@@ -0,0 +1,23 @@
+# dts_self_resolution_reads_and_rewrites_declaration
+
+The source imports a type through its own package name, whose `exports.types` target is the existing `dist/index.d.ts`. rolldown-plugin-dts delegates that import to TypeScript's bundler resolver and creates a TypeScript program, so the declaration is resolved and read before the declaration bundle replaces the same path. See [`tscResolve`](https://github.com/sxzz/rolldown-plugin-dts/blob/363cc09b660675e15ec8791ce0f05f1044a7048a/src/tsc/resolver.ts#L7-L38) and [the TypeScript program construction](https://github.com/sxzz/rolldown-plugin-dts/blob/363cc09b660675e15ec8791ce0f05f1044a7048a/src/tsc/emit-compiler.ts#L112-L128).
+
+## `vt run -v overlap`
+
+```
+~/cases/dts-self-resolution$ tsdown --logLevel silent
+
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+    Vite+ Task Runner • Execution Summary
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Statistics:   1 tasks • 0 cache hits • 1 cache misses
+Performance:  0% cache hit rate
+
+Task Details:
+────────────────────────────────────────────────
+  [1] dts-self-resolution-overlap#overlap: ~/cases/dts-self-resolution$ tsdown --logLevel silent ✓
+      → Not cached: read and wrote 'cases/dts-self-resolution/dist/index.d.ts'
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots/oxfmt_reads_and_rewrites_source.md

@@ -0,0 +1,24 @@
+# oxfmt_reads_and_rewrites_source
+
+In write mode, oxfmt reads each source file, formats the text, and writes changed text back to that same path. The checked-in `source.ts` is intentionally unformatted, so the file is both read and written. See [the formatter service's read and write sequence](https://github.com/oxc-project/oxc/blob/5306f24d9e82ae36ad9c3c964f33075bc589c799/apps/oxfmt/src/cli/service.rs#L42-L82) and [`read_to_string`](https://github.com/oxc-project/oxc/blob/5306f24d9e82ae36ad9c3c964f33075bc589c799/apps/oxfmt/src/core/utils.rs#L50-L53).
+
+## `vt run -v overlap`
+
+```
+~/cases/oxfmt-in-place$ oxfmt --threads=1 source.ts
+Finished in <duration> on 1 files using <n> threads.
+
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+    Vite+ Task Runner • Execution Summary
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Statistics:   1 tasks • 0 cache hits • 1 cache misses
+Performance:  0% cache hit rate
+
+Task Details:
+────────────────────────────────────────────────
+  [1] oxfmt-in-place-overlap#overlap: ~/cases/oxfmt-in-place$ oxfmt --threads=1 source.ts ✓
+      → Not cached: read and wrote 'cases/oxfmt-in-place/source.ts'
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots/tailwind_reads_and_rewrites_output.md

@@ -0,0 +1,26 @@
+# tailwind_reads_and_rewrites_output
+
+Tailwind's CLI stats and reads an existing output file to compare its contents with the newly generated CSS, then writes the file when the contents differ. This makes `dist/output.css` both a read and a write in one command. See [`outputFile`](https://github.com/tailwindlabs/tailwindcss/blob/8a14a710102cae195f6811e8578bef9477bc6be9/packages/%40tailwindcss-cli/src/commands/build/utils.ts#L15-L34).
+
+## `vt run -v overlap`
+
+```
+~/cases/tailwind-output$ tailwindcss -i input.css -o dist/output.css --minify
+≈ tailwindcss v4.3.1
+
+Done in <duration>
+
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+    Vite+ Task Runner • Execution Summary
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Statistics:   1 tasks • 0 cache hits • 1 cache misses
+Performance:  0% cache hit rate
+
+Task Details:
+────────────────────────────────────────────────
+  [1] tailwind-output-overlap#overlap: ~/cases/tailwind-output$ tailwindcss -i input.css -o dist/output.css --minify ✓
+      → Not cached: read and wrote 'cases/tailwind-output/dist/output.css'
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots/tsdown_clean_reads_and_rewrites_dist.md

@@ -0,0 +1,23 @@
+# tsdown_clean_reads_and_rewrites_dist
+
+tsdown expands the configured clean paths with `tinyglobby` and removes every matched entry before the bundle writes its replacement. With an existing `dist/index.js`, the build therefore observes and removes that path before emitting `dist/index.js` again. See [`cleanOutDir`](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/features/clean.ts#L14-L45).
+
+## `vt run -v overlap`
+
+```
+~/cases/tsdown-clean$ tsdown --logLevel silent
+
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+    Vite+ Task Runner • Execution Summary
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Statistics:   1 tasks • 0 cache hits • 1 cache misses
+Performance:  0% cache hit rate
+
+Task Details:
+────────────────────────────────────────────────
+  [1] tsdown-clean-overlap#overlap: ~/cases/tsdown-clean$ tsdown --logLevel silent ✓
+      → Not cached: read and wrote 'cases/tsdown-clean/dist/index.js'
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/snapshots/tsdown_shebang_reads_and_changes_emitted_entry.md

@@ -0,0 +1,23 @@
+# tsdown_shebang_reads_and_changes_emitted_entry
+
+After Rolldown writes a shebang entry, tsdown checks that emitted file with `access` and then changes its mode with `chmod`. The same `dist/index.js` is consequently read and mutated during one build. See [the shebang plugin](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/features/shebang.ts#L18-L34) and [`fsExists`](https://github.com/rolldown/tsdown/blob/49cc5f953f1b6ab13968fef8509d69767373253b/src/utils/fs.ts#L5-L9).
+
+## `vt run -v overlap`
+
+```
+~/cases/tsdown-shebang$ tsdown --logLevel silent
+
+
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+    Vite+ Task Runner • Execution Summary
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+Statistics:   1 tasks • 0 cache hits • 1 cache misses
+Performance:  0% cache hit rate
+
+Task Details:
+────────────────────────────────────────────────
+  [1] tsdown-shebang-overlap#overlap: ~/cases/tsdown-shebang$ tsdown --logLevel silent ✓
+      → Not cached: read and wrote 'cases/tsdown-shebang/dist/index.js'
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+```

crates/vite_task_bin/tests/e2e_snapshots/fixtures/real_package_read_write_overlaps/vite-task.json

@@ -0,0 +1,3 @@
+{
+  "cache": true
+}

packages/tools/package.json

@@ -4,6 +4,7 @@
   "type": "module",
   "dependencies": {
     "@playwright/browser-chromium": "catalog:",
+    "@tailwindcss/cli": "catalog:",
     "@vitest/browser-playwright": "catalog:",
     "@voidzero-dev/vite-task-client": "workspace:*",
     "bun": "catalog:",
@@ -13,6 +14,8 @@
     "oxlint": "catalog:",
     "oxlint-tsgolint": "catalog:",
     "playwright": "catalog:",
+    "rolldown-plugin-dts": "catalog:",
+    "tsdown": "catalog:",
     "vite": "catalog:",
     "vitest": "catalog:"
   }