2020-07-22 12:03:46 -04:00
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# tsc
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2020-12-17 11:37:57 -05:00
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This directory contains the typescript compiler and a small compiler host for
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the runtime snapshot.
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2022-11-25 18:29:48 -05:00
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## How to upgrade TypeScript.
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The files in this directory are mostly from the TypeScript repository. We
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currently (unfortunately) have a rather manual process for upgrading TypeScript.
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It works like this currently:
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1. Checkout denoland/TypeScript repo in a separate directory.
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1. Add Microsoft/TypeScript as a remote and fetch its latest tags
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1. Checkout a new branch based on this tag.
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1. Cherry pick the custom commit we made in a previous release to the new one.
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1. This commit has a "deno.ts" file in it. Read the instructions in it.
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1. Copy typescript.js into Deno repo.
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1. Copy d.ts files into dts directory.
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So that might look something like this:
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```
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git clone https://github.com/denoland/TypeScript.git
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cd typescript
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git remote add upstream https://github.com/Microsoft/TypeScript
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git fetch upstream
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git checkout v3.9.7
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git checkout -b branch_v3.9.7
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git cherry pick <previous-release-branch-commit-we-did>
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npm install
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gulp local
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rsync lib/typescript.js ~/src/deno/cli/tsc/00_typescript.js
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rsync --exclude=protocol.d.ts --exclude=tsserverlibrary.d.ts --exclude=typescriptServices.d.ts lib/*.d.ts ~/src/deno/cli/tsc/dts/
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```
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