denoland-deno/cli/tests/single_compile_with_reload_dyn.ts at 6453cb75670b6aefbfc712c7d05b1135bee6226c - foster/denoland-deno - Foster's Laboratory

foster/denoland-deno

mirror of https://github.com/denoland/deno.git synced 2024-12-25 00:29:09 -05:00

Bartek Iwańczuk 3cbd1075c7

Incremental compilation for TypeScript (#6428 )

This commit adds incremental compilation capabilities to internal TS compiler.

Instead of using "ts.createProgram()" API for compilation step (during deno 
startup), "ts.createIncrementalProgram()" API is used instead.

Thanks to TS' ".tsbuildinfo" file that already stores all necessary metadata
for compilation I was able to remove our own invention that is ".graph" file. 
".tsbuildinfo" file is stored alongside compiled source and is used to 
cache-bust outdated dependencies, facilitated by the "version" field. 
The value for "version" field is computed in Rust during loading of module 
graph and is basically a hash of the file contents.

Please keep in mind that incremental compilation is only used for initial 
compilation (or dynamic imports compilation) - bundling and runtime compiler 
APIs haven't been changed at all.

Due to problems with source map I changed compilation settings to inline 
source map (inlineSourceMap instead of sourceMap).

2020-06-24 16:59:12 +02:00

11 lines

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TypeScript

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 import { returnsHi, returnsFoo2, printHello3 } from "./subdir/mod1.ts";
 printHello3();
 if (returnsHi() !== "Hi") {
   throw Error("Unexpected");
 }
 if (returnsFoo2() !== "Foo") {
   throw Error("Unexpected");
 }