allow disabling "use strict" emit in SWC when you reeeally want to #1537
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This PR contains the following updates: | Package | Type | Update | Change | |---|---|---|---| | [ts-node](https://typestrong.org/ts-node) ([source](https://github.com/TypeStrong/ts-node)) | devDependencies | minor | [`10.4.0` -> `10.5.0`](https://renovatebot.com/diffs/npm/ts-node/10.4.0/10.5.0) | --- ### Release Notes <details> <summary>TypeStrong/ts-node</summary> ### [`v10.5.0`](https://github.com/TypeStrong/ts-node/releases/v10.5.0) [Compare Source](TypeStrong/ts-node@v10.4.0...v10.5.0) <!-- I don't make a discussion thread for every release. Github has a button to make a discussion thread for a release. Then I update the discussion thread to remove the release notes and instead link to the release. --> Questions about this release? Ask in the official discussion thread: [#​1634](TypeStrong/ts-node#1634) **Added** - Eliminate "Emit Skipped" errors ([#​693](TypeStrong/ts-node#693), [#​1345](TypeStrong/ts-node#1345), [#​1629](TypeStrong/ts-node#1629)) - Avoids all "Emit Skipped" errors by performing a fallback `transpileOnly`-style transformation. - Does not affect typechecking. Type errors are still detected and thrown. - Fallback has the same limitations as `isolatedModules`. This will only affect rare cases such as using `const enums` with `preserveConstEnums` disabled. - Fixes [#​693](TypeStrong/ts-node#693) - Graduate swc transpiler out of experimental; add `swc: true` convenience option ([docs](https://typestrong.org/ts-node/docs/transpilers)) ([#​1487](TypeStrong/ts-node#1487), [#​1536](TypeStrong/ts-node#1536), [#​1613](TypeStrong/ts-node#1613), [#​1627](TypeStrong/ts-node#1627)) - `"swc": true` or `--swc` will use swc for faster execution - This feature is no longer marked "experimental." Thank you to everyone who filed bugs! - swc transpiler attempts to load `@swc/core` or `@swc/wasm` dependencies from your project before falling-back to global installations ([#​1613](TypeStrong/ts-node#1613), [#​1627](TypeStrong/ts-node#1627)) - global fallback only occurs when using a global installation of ts-node - Add support for TypeScript's `traceResolution` output ([docs](https://www.typescriptlang.org/tsconfig/#traceResolution)) ([#​1128](TypeStrong/ts-node#1128), [#​1491](TypeStrong/ts-node#1491)) [@​TheUnlocked](https://github.com/TheUnlocked) - Support import assertions in ESM loader ([docs](https://nodejs.org/dist/latest-v17.x/docs/api/esm.html#import-assertions)) ([#​1557](TypeStrong/ts-node#1557), [#​1558](TypeStrong/ts-node#1558), [#​1559](TypeStrong/ts-node#1559), [#​1573](TypeStrong/ts-node#1573)) [@​Pokute](https://github.com/Pokute), [@​geigerzaehler](https://github.com/geigerzaehler) - Allows importing JSON files from ESM with the requisite flag ([docs](https://nodejs.org/dist/latest-v17.x/docs/api/esm.html#json-modules)) - `ts-node -vvv` also logs absolute paths to `ts-node` and `typescript`, to make it more obvious when you're accidentally using globally-installed versions ([#​1323](TypeStrong/ts-node#1323), [#​1620](TypeStrong/ts-node#1620)) - Add swc target "es2022" ([#​1535](TypeStrong/ts-node#1535), [#​1540](TypeStrong/ts-node#1540)) - When you have target es2022 in tsconfig, will use swc's es2022 target **Changed** - Initialize TypeScript compiler before starting REPL prompt ([#​1498](TypeStrong/ts-node#1498)) [@​TheUnlocked](https://github.com/TheUnlocked) - Improves responsiveness for first line of REPL input - Use `v8-compile-cache-lib` to load typescript - improves startup time ([#​1339](TypeStrong/ts-node#1339), [#​1603](TypeStrong/ts-node#1603)) - Support both `--camelCase` and `--hyphen-case` for all CLI flags; update documentation to use `--camelCase` ([#​1598](TypeStrong/ts-node#1598), [#​1599](TypeStrong/ts-node#1599)) - Not a breaking change; CLI continues to accept both forms - Make `TSError` `diagnosticText` property non-enumerable to prevent it from being logged below the stack ([#​1632](TypeStrong/ts-node#1632)) **Fixed** - Fix [#​1538](TypeStrong/ts-node#1538): REPL inputs fail to transpile via swc ([#​1538](TypeStrong/ts-node#1538), [#​1541](TypeStrong/ts-node#1541), [#​1602](TypeStrong/ts-node#1602)) - Fix [#​1478](TypeStrong/ts-node#1478): REPL erroneously logged `undefined` for all inputs after the first when using swc transpiler ([#​1478](TypeStrong/ts-node#1478), [#​1580](TypeStrong/ts-node#1580), [#​1602](TypeStrong/ts-node#1602)) - Fix [#​1389](TypeStrong/ts-node#1389): In `--showConfig` output, emit accurate `moduleTypes` paths resolved relative to the `tsconfig.json` which declared them ([#​1389](TypeStrong/ts-node#1389), [#​1619](TypeStrong/ts-node#1619)) - Fix: Remove indentation from `ts-node --help` output ([#​1597](TypeStrong/ts-node#1597), [#​1600](TypeStrong/ts-node#1600)) - Fix [#​1425](TypeStrong/ts-node#1425): Merged definitions correctly into `tsconfig.schemastore-schema.json` ([#​1425](TypeStrong/ts-node#1425), [#​1618](TypeStrong/ts-node#1618)) - Fix: Allow disabling `"use strict"` emit in SWC transpiler ([#​1531](TypeStrong/ts-node#1531), [#​1537](TypeStrong/ts-node#1537)) - Fix: Add missing `ERR_UNKNOWN_FILE_EXTENSION` constructor; was throwing `ERR_UNKNOWN_FILE_EXTENSION is not a constructor` ([#​1562](TypeStrong/ts-node#1562)) [@​bluelovers](https://github.com/bluelovers) - Fix [#​1565](TypeStrong/ts-node#1565): entrypoint resolution failed on node v12.0.x and v12.1.x ([#​1565](TypeStrong/ts-node#1565), [#​1566](TypeStrong/ts-node#1566)) [@​davidmurdoch](https://github.com/davidmurdoch) #### Docs - Explain `env -S` flag for shebangs ([docs](https://typestrong.org/ts-node/docs/usage#shebang)) ([#​1448](TypeStrong/ts-node#1448), [#​1545](TypeStrong/ts-node#1545)) [@​sheeit](https://github.com/sheeit), [@​chee](https://github.com/chee) - Suggest `skipIgnore` when you want to compile files in node_modules ([docs](https://typestrong.org/ts-node/docs/how-it-works)) ([#​1553](TypeStrong/ts-node#1553)) [@​webstrand](https://github.com/webstrand) - Fix typo in `moduleTypes` on options page ([docs](https://typestrong.org/ts-node/docs/options)) ([#​1630](TypeStrong/ts-node#1630), [#​1633](TypeStrong/ts-node#1633)) #### Misc - Adds experimental `experimentalResolverFeatures` option, but it does not do anything yet ([#​1514](TypeStrong/ts-node#1514), [#​1614](TypeStrong/ts-node#1614)) https://github.com/TypeStrong/ts-node/milestone/4 </details> --- ### Configuration 📅 **Schedule**: At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox. --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate). Co-authored-by: cabr2-bot <cabr2.help@gmail.com> Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1156 Reviewed-by: crapStone <crapstone@noreply.codeberg.org> Co-authored-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org> Co-committed-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
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Fixes #1531
Tell swc to emit "use strict" in all cases except when both
alwaysStrictis disabled andnoImplicitUseStrictis enabled.tsc, by default, will add"use strict"whenever you use any sort of import or export. Additionally, ifstrict: trueis configured, it will always emit"use strict".I expect that most node scripts, even standalone ones, will have at least one import, for example
import {} from 'fs';TS is bending over backwards to allow scripts with zero imports or exports to run in non-strict mode. I suspect this behavior only exists for backwards compatibility, and users generally want "use strict" enabled when working with node.swc is not as nuanced as TS. We can either tell it to always emit use strict, or never emit.
Given this limitation of swc, I'm going to pragmatically assume that all node scripts have an import or export, and set swc's options to emit
"use strict".If a user really really needs to avoid strict mode, they will likely have
alwaysStrict: false, noImplicitUseStrict: true. We can detect this and tell swc not to emit"use strict"